A moving mold ejection structure for a die casting mold

Abstract

This invention relates to the field of die-casting mold technology, and discloses a moving mold ejection structure for a die-casting mold, comprising: a moving mold frame; an ejection plate; a first ejector pin; a sliding plate and a driving component, wherein a second ejector pin is provided on the sliding plate; the first ejector pin is capable of at least two ejections: during the first ejection, the second ejector pin is offset from the first ejector pin, the ejection plate moves from the lower limit position to the upper limit position side, and pushes against the force input end through the ejection plate or the sliding plate, causing the first ejector pin to eject once; after the first ejector pin completes the first ejection, the ejection plate moves to the lower limit position side, and the driving component drives the sliding plate to align the second ejector pin with the first ejector pin; during the second ejection, the ejection plate moves to the upper limit position side, and pushes against the force input end through the second ejector pin, causing the first ejector pin to eject a second time. The advantage of this invention is that the moving mold ejection structure can effectively increase the ejection stroke, reduce the thickness of the die-casting mold, and ensure that the die-casting mold can be used on a small-tonnage die-casting machine.

Description

Technical Field

[0001] This invention relates to the field of die casting mold technology, and in particular to a moving mold ejection structure for a die casting mold. Background Technology

[0002] For some castings whose height dimension is much larger than their length and width dimensions, such as cylindrical castings, in order to ensure the flow of molten metal during die casting, the height dimension of the casting is set along the thickness of the die casting mold. Correspondingly, this setting requires the moving mold ejection mechanism of the die casting mold to have a large ejection stroke (generally required to be greater than the height dimension of the casting). Otherwise, after the casting is die-cast, the moving mold ejection mechanism will not be able to completely eject the casting.

[0003] Small-tonnage die-casting machines can only accommodate die-casting molds of limited thickness and have limited ejection stroke. For die-casting molds with larger thickness or requiring a large ejection stroke, die-casting cannot be performed on small-tonnage die-casting machines and must be transferred to large-tonnage die-casting machines, leading to increased die-casting costs. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by the present invention is to propose a moving mold ejection structure for a die casting mold that can effectively increase the ejection stroke and reduce the thickness of the die casting mold.

[0005] The technical solution adopted by this invention to solve its technical problem is to propose a moving mold ejection structure for a die-casting mold, comprising:

[0006] Moving model frame;

[0007] An ejector plate is disposed on the moving mold frame and has an upper limit position and a lower limit position on the moving mold frame. The ejector plate can move between the upper limit position and the lower limit position.

[0008] A first ejector rod is inserted into the moving mold frame. The end of the first ejector rod away from the ejector plate is set as the ejector end, and the end of the first ejector rod close to the ejector plate is set as the power input end.

[0009] A sliding plate and a drive unit, wherein the sliding plate is slidably disposed on the top plate and a second top rod is provided on the sliding plate; the drive unit is disposed on the top plate and connected to the sliding plate, and the drive unit is configured to drive the sliding plate to slide such that the second top rod is misaligned with or aligned with the first top rod.

[0010] The first push rod is configured to be able to push out at least twice:

[0011] During one ejection, the second ejector rod is misaligned with the first ejector rod, the ejector plate moves from the lower limit position to the upper limit position, and pushes against the power input end through the ejector plate or the sliding plate, so that the first ejector rod is ejected once;

[0012] After the first push rod completes one push-out, the push-out plate moves toward the lower limit position side, and the driving member drives the sliding plate to align the second push rod with the first push rod;

[0013] During the second ejection, the ejection plate moves toward the upper limit position and pushes against the power input end through the second ejector rod, causing the first ejector rod to eject a second time.

[0014] Furthermore, the length of the second push rod is less than or equal to the length of the first push rod, and the stroke of the first push rod in one push is greater than the stroke of the first push rod in two pushes.

[0015] Furthermore, the ejector plate is provided with a limiting block, and the limiting block is located on the sliding path of the slide plate;

[0016] When the driving member drives the slide plate to slide against the limiting block, the second push rod is aligned with the first push rod. At this time, the center line of the second push rod coincides with the center line of the first push rod.

[0017] Furthermore, a guide strip is provided on each side of the skateboard;

[0018] The ejector plate is provided with a plurality of spaced guide blocks along the length of the two guide protrusions. When the slide plate slides relative to the ejector plate, the guide protrusions and the plurality of guide blocks move against each other, and the guide blocks restrict the slide plate from detaching from the ejector plate.

[0019] Furthermore, the ejector plate is provided with a through groove along the sliding direction of the slide plate, the through groove extending from one side of the ejector plate to the other side of the ejector plate, and the through groove is located below the slide plate.

[0020] Furthermore, the top surface of the slide is set as a plane, the top surface of the second push rod is set as a plane, and the bottom surface of the first push rod is set as a plane;

[0021] The diameter of the second push rod is greater than or equal to the diameter of the first push rod, and the width of the slide plate is greater than the diameter of the first push rod and also greater than the diameter of the second push rod.

[0022] Furthermore, the moving mold frame includes a moving template, a first support leg, and a second support leg. The first support leg and the second support leg are supported at intervals below the moving template and are detachably and fixedly connected to the moving template; the ejector plate is located between the first support leg and the second support leg.

[0023] The moving template is provided with a limiting post below it that is detachably and fixedly connected to it. The first support foot and / or the second support foot is provided with a limiting plate. When the ejector plate is in the upper limit position, the ejector plate abuts against the limiting post; when the ejector plate is in the lower limit position, the ejector plate abuts against the limiting plate.

[0024] Furthermore, the ejector plate includes a base plate and a panel, the panel being disposed on the base plate and detachably and fixedly connected to the base plate; the sliding plate is movably disposed on the panel.

[0025] Multiple guide sleeves are provided between the base plate and the panel, and multiple guide posts are provided on the moving template. Each guide post corresponds to one of the multiple guide sleeves, and the guide posts pass through the guide sleeves.

[0026] A connecting joint is provided between the base plate and the panel. The connecting joint has a first threaded rod that extends from the base plate toward the side away from the panel. The first threaded rod is configured to be connected to the push-pull rod of the die-casting machine.

[0027] Furthermore, a second threaded rod is provided at one end of the second push rod near the slide plate, and the slide plate is provided with a threaded hole corresponding to the second threaded rod, and the second threaded rod is detachably connected to the threaded hole.

[0028] Furthermore, the driving component is configured as a hydraulic cylinder, which is detachably fixedly installed on the side of the ejector plate, and the height of the hydraulic cylinder is higher than the height of the bottom surface of the ejector plate.

[0029] The sliding plate is connected to the telescopic end of the hydraulic cylinder.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] In this invention, a slide plate is slidably mounted on the ejector plate, and a drive component for driving the slide plate is provided. A second push rod is mounted on the slide plate, and the drive component, by driving the slide plate to slide, can cause the second push rod to be misaligned with or aligned with the first push rod. The first push rod is configured to eject at least twice. During the first ejection, the second push rod is misaligned with the first push rod, and the ejector plate moves from a lower limit position to an upper limit position, pushing against the power input end of the first push rod via the ejector plate or the slide plate, causing the first push rod to eject once. After the first ejection, the ejector plate moves to a lower limit position, while the first push rod remains stationary. The drive component drives the slide plate to slide, aligning the second push rod with the first push rod, preparing for the second ejection. During the second ejection, the ejector plate moves to its upper limit position, pushing against the power input end of the first push rod via the second push rod, causing the first push rod to eject a second time. The total ejection stroke of the first push rod is equivalent to the sum of the ejection stroke of the first ejection and the ejection stroke of the second ejection. When the maximum ejection stroke of a small-tonnage die-casting machine cannot meet the ejection stroke requirements of the casting, the ejection stroke requirements can be met by superimposing two ejection strokes. This allows castings with large stroke requirements to be die-cast using a small-tonnage die-casting machine. Furthermore, the first ejector pin is designed to perform at least two ejections, which effectively reduces the thickness of the die-casting mold. The thickness of the first and second support legs in the moving mold frame can at least reduce the length of the second ejector pin. This also prevents the die-casting mold from being too thick to be die-cast on a small-tonnage die-casting machine, effectively reducing die-casting costs.

[0032] In this invention, the length of the second push rod is less than or equal to the length of the first push rod, and the first push rod's single push stroke is greater than its second push stroke, ensuring that the first push is primary and the second push is secondary. This also allows the push plate to not fully reset to its lower limit position after the first push, saving push time and improving push efficiency. The top surfaces of the sliding plate, the second push rod, and the first push rod are all planar, ensuring that both pushes occur with planar surfaces touching and pushing against each other, guaranteeing reliable push action. Furthermore, the diameter of the second push rod is greater than or equal to the diameter of the first push rod, and the width of the sliding plate is greater than both the diameters of the first and second push rods. The push force is transmitted from the sliding plate or the second push rod to the power input end of the first push rod, ensuring reliable force transmission.

[0033] In this invention, a limiting block is provided on the ejector plate, and the limiting block is located on the sliding path of the slide plate. When the driving component drives the slide plate to slide until it abuts against the limiting block, the second push rod aligns with the first push rod, and their center lines coincide. The limiting block provides a guarantee for the alignment of the second push rod and the first push rod, ensuring that the slide plate does not slide excessively. Multiple spaced guide sliders are provided on the ejector plate along the length of the two guide ridges of the slide plate. These guide sliders not only provide guidance for the sliding of the slide plate but also prevent the slide plate from detaching from the ejector plate, ensuring reliable sliding of the slide plate. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the moving mold ejection structure of the die-casting mold in this invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the ejector section of the moving mold after an explosion;

[0036] Figure 3 for Figure 2 A schematic diagram after removing the moving mold frame and its upper part;

[0037] Figure 4 for Figure 3 A half-section diagram;

[0038] Figure 5 for Figure 1 A schematic diagram of the structure after the top plate moves to its upper limit position;

[0039] Figure 6 for Figure 5 A schematic diagram of the structure after the top plate retracts to the lower limit position;

[0040] Figure 7 for Figure 6 A schematic diagram showing the second push rod aligned with the first push rod after the middle drive component drives the slide plate.

[0041] Figure 8 for Figure 7 A schematic diagram after removing the moving mold frame and its upper part;

[0042] Figure 9 for Figure 7 A schematic diagram of the structure after the first push rod has been pushed out for the second time;

[0043] Figure 10 for Figure 9 A schematic diagram after removing the first support foot, the second support foot, and the upper part of the moving mold frame.

[0044] In the picture:

[0045] 1. Moving mold frame; 10. Moving mold plate; 11. First support leg; 12. Second support leg; 101. Limiting post; 102. Guide post; 120. Limiting plate;

[0046] 2. Ejector plate; 21. Base plate; 22. Panel; 23. Guide sleeve; 24. Connecting joint; 220. Through groove; 221. Limiting block; 222. Guide slider; 240. First threaded rod;

[0047] 3. First ejector rod; 30. Ejector end; 31. Power input end;

[0048] 4. Slide plate; 40. Second push rod; 41. Guide slide protrusion; 42. Threaded hole; 401. Second threaded rod;

[0049] 5. Drive components. Detailed Implementation

[0050] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0052] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0055] like Figures 1-10 As shown in this embodiment, the moving mold ejection structure of a die-casting mold mainly includes:

[0056] The moving mold frame 1 is a support structure for the moving mold part of the die-casting mold, which facilitates the installation of other components to the moving mold part. It mainly includes: a first support leg 11, a second support leg 12, and at least one moving template 10. The first support leg 11 and the second support leg 12 are supported below the moving template 10. The specific structure of the moving mold frame 1 will be described in detail later.

[0057] Ejector plate 2 is disposed on the moving mold frame 1, and has an upper limit position and a lower limit position on the moving mold frame 1. Ejector plate 2 can move between the upper limit position and the lower limit position. When ejector plate 2 moves from the lower limit position to the upper limit position, it performs an ejection action. When ejector plate 2 moves from the upper limit position to the lower limit position, it resets. When the die casting mold is in the mold closed state, ejector plate 2 is in the lower limit position. When the die casting mold moves from the lower limit position to the upper limit position, it performs an ejection action. Generally, in order to facilitate the fixing of other components (such as ejector rods) on ejector plate 2, ejector plate 2 is divided into a bottom plate 21 and a top plate 22. That is, ejector plate 2 is set as two detachable and fixedly connected top and bottom plates 22 and 21.

[0058] The first ejector rod 3 is inserted into the moving mold frame 1, and also into the moving mold core (not shown in the figure) on the moving mold frame 1 to facilitate ejecting the die-cast product after die casting. The end of the first ejector rod 3 away from the ejector plate 2 is set as the ejector end 30, and the end of the first ejector rod 3 close to the ejector plate 2 is set as the power input end 31. That is, with reference to the direction shown in the figure in the specification, the upper end of the first ejector rod 3 is the ejector end 30, and the lower end of the first ejector rod 3 is the power input end 31. Power is input from the power input end 31 of the first ejector rod 3 to drive the first ejector rod 3 to move. The first ejector rod 3 acts directly or indirectly on the formed casting through its ejector end 30 to eject the casting.

[0059] In this embodiment, the power input end 31 of the first ejector rod 3 is a free end, which ensures that when the ejector plate 2 retracts to reset, it will not drive the first ejector rod 3 to retract, thereby ensuring that the stroke of the first ejector rod 3 during the second ejection can be superimposed; after the casting is ejected, the reset of the first ejector rod 3 can be achieved when the die-casting mold is closed, the moving mold module moves closer to and abuts against the fixed mold module, so that the ejector end 30 of the first ejector rod 3 is abutted by the fixed mold module, forcing the first ejector rod 3 to reset;

[0060] The slide plate 4 and the drive component 5 are provided. The slide plate 4 is slidably mounted on the ejector plate 2. The slide plate 4 is provided with a second push rod 40, which moves with the movement of the slide plate 4. It can be understood that the second push rod 40 is fixedly mounted on the slide plate 4, so the second push rod 40 moves with the movement of the slide plate 4. The drive component 5 is mounted on the ejector plate 2 and connected to the slide plate 4. The drive component 5 is configured to drive the slide plate 4 to slide, so that the second push rod 40 is misaligned with the first push rod 3 or aligned with the first push rod 3. In use, when the second push rod 40 is not needed to participate in the ejection action, the drive component 5 drives the second push rod 40 to be misaligned with the first push rod 3; when the second push rod 40 is needed to participate in the ejection action, the drive component 5 drives the second push rod 40 to be aligned with the first push rod 3.

[0061] In actual use, the first push rod 3 is configured to be able to push out at least twice:

[0062] During one ejection, the driving component 5 drives the second ejector rod 40 to be misaligned with the first ejector rod 3, and the second ejector rod 40 does not participate in this ejection action; the ejector plate 2 moves from the lower limit position to the upper limit position side, and pushes the power input end 31 of the first ejector rod 3 through the ejector plate 2 or the sliding plate 4, so that the first ejector rod 3 performs one ejection; that is, in this embodiment, the power input end 31 of the first ejector rod 3 can be pushed directly by the ejector plate 2, or the power input end 31 of the first ejector rod 3 can be pushed by the sliding plate 4;

[0063] After the first ejector rod 3 completes one ejection, the ejector plate 2 moves towards the lower limit position, and the driving component 5 drives the sliding plate 4 to align the second ejector rod 40 with the first ejector rod 3. It should be explained that in this embodiment, during this process, the ejector plate 2 can be completely reset to its lower limit position, or it may not need to be completely reset to its lower limit position, but only a partial reset is required. However, it is necessary to ensure that when driving the second ejector rod 40 to align with the first ejector rod 3, the first ejector rod 3 will not interfere with the alignment movement of the second ejector rod 40. If the ejector plate 2 is reset only a partial distance instead of completely resetting to its lower limit position, the reset time of the ejector plate 2 can be saved, thereby improving the working efficiency of the die-casting mold and increasing the working cycle. If the ejector plate 2 is completely reset to its lower limit position, there is no need to strictly control the reset distance of the ejector plate 2; the ejector plate 2 only needs to move until it abuts against the limiting plate 120 below it, thus reaching its lower limit position and being unable to move further downwards.

[0064] During the second ejection, the ejector plate 2 moves towards the upper limit position and pushes against the power input end 31 via the second ejector rod 40, causing the first ejector rod 3 to eject a second time. The total ejection stroke of the first ejector rod 3 is the sum of the ejection stroke of the first ejection and the ejection stroke of the second ejection, that is, the second ejection stroke of the first ejector rod 3 is superimposed. Within one die-casting cycle, the first ejector rod 3 completes two ejection actions in sequence: the first ejection and the second ejection.

[0065] In this embodiment, a slide plate 4 is slidably mounted on the ejector plate 2, and a drive member 5 is provided for driving the slide plate 4. A second push rod 40 is provided on the slide plate 4, and the drive member 5 can cause the second push rod 40 to be misaligned with the first push rod 3 or aligned with the first push rod 3 by driving the slide plate 4 to slide. The first push rod 3 is configured to eject at least twice. During one ejection, the second push rod 40 is misaligned with the first push rod 3, and the second push rod 40 does not participate in the ejection action. Only the first push rod 3 participates in the ejection action. The ejector plate 2 moves from the lower limit position to the upper limit position side, and pushes the power input end 31 of the first push rod 3 through the ejector plate 2 or the slide plate 4, so that the first push rod 3 ejects once.

[0066] After one ejection is completed, the ejector plate 2 moves to its lower limit position, while the first ejector rod 3 remains stationary (i.e., the first ejector rod 3 will not reset as the ejector plate 2 resets). The drive component 5 drives the slide plate 4 to slide, so that the second ejector rod 40 is aligned with the first ejector rod 3, in preparation for the second ejection of the first ejector rod 3.

[0067] During the second ejection, the ejector plate 2 moves toward its upper limit position and pushes the power input end 31 of the first ejector rod 3 through the second ejector rod 40, causing the first ejector rod 3 to eject for the second time. Both the second ejector rod 40 and the first ejector rod 3 participate in this ejection action.

[0068] The total ejection stroke of the first ejector rod 3 is equivalent to the sum of the ejection stroke of the first ejector rod 3 during one ejection and the ejection stroke of the first ejector rod 3 during two ejections. When the maximum ejection stroke of a small-tonnage die-casting machine cannot meet the ejection stroke requirements of the casting, the ejection stroke requirements of the casting can be met by superimposing the two ejection strokes of the first ejector rod 3, thus enabling castings with large ejection stroke requirements to be die-cast using a small-tonnage die-casting machine.

[0069] Furthermore, the first ejector rod 3 is designed to eject at least twice, which can effectively reduce the thickness of the die-casting mold. Because the thickness of the first support leg 11 and the second support leg 12 in the moving mold frame 1 can at least reduce the length of the second ejector rod 40, it can also prevent the die-casting mold from being unable to be die-cast on a small-tonnage die-casting machine due to excessive thickness, thus effectively reducing the die-casting cost.

[0070] Generally speaking, for the same product, the cost of die casting using a large-tonnage die casting machine is much higher than that of die casting using a small-tonnage die casting machine. Therefore, under the condition of ensuring the quality of die casting, small-tonnage die casting machines are selected as much as possible to reduce the die casting cost of a single casting.

[0071] In this embodiment, the length of the second ejector rod 40 is less than or equal to the length of the first ejector rod 3, and the stroke of the first ejector rod 3 in one ejection is greater than the stroke of the first ejector rod 3 in two ejections. This ensures that one ejection is the primary action, with two ejections as secondary actions. For example, in actual use, the stroke of the first ejector rod 3 in one ejection can be set to the maximum ejection stroke of a small-tonnage die-casting machine.

[0072] Furthermore, in this embodiment, the top surface of the slide plate 4 is set as a plane, the top surface of the second push rod 40 is set as a plane, and the bottom surface of the first push rod 3 is set as a plane. When the first push rod 3 pushes out once, the top surface (which is a plane) of the slide plate 4 pushes against the bottom surface (which is a plane) of the first push rod 3, ensuring that the slide plate 4 reliably pushes against the first push rod 3 and avoiding slippage during push-out. When the first push rod 3 pushes out a second time, the top surface (which is a plane) of the second push rod 40 pushes against the bottom surface (which is a plane) of the first push rod 3, ensuring that the second push rod 40 reliably pushes against the first push rod 3 and similarly avoiding slippage during push-out.

[0073] Furthermore, the diameter of the second push rod 40 is greater than or equal to the diameter of the first push rod 3, the width of the slide plate 4 is greater than the diameter of the first push rod 3, and the width of the slide plate 4 is greater than the diameter of the second push rod 40. This is also to ensure that the movement transmitted to the power input end 31 of the first push rod 3 is reliable during the push-out action, and to ensure the stability of the push-out action of the first push rod 3 during the first push-out and the second push-out.

[0074] In practical use, the length of the second push rod 40 in this embodiment is less than or equal to the length of the first push rod 3, and the first push stroke of the first push rod 3 is greater than the second push stroke of the first push rod 3, ensuring that the first push is the main push and the second push is the auxiliary push. This also ensures that after the first push is completed, the push plate 2 does not need to be completely reset to its lower limit position, saving push time and improving push efficiency. The top surfaces of the slide plate 4, the second push rod 40, and the bottom surface of the first push rod 3 are all set as planes, ensuring that during both pushes, the planes are in contact and push against each other, ensuring reliable push action. Furthermore, the diameter of the second push rod 40 is greater than or equal to the diameter of the first push rod 3, and the width of the slide plate 4 is greater than the diameters of both the first and second push rods. The push force is transmitted from the slide plate 4 or the second push rod 40 to the power input end 31 of the first push rod 3, ensuring reliable transmission of the push force.

[0075] like Figures 7-8 As shown, in this embodiment, the ejector plate 2 is provided with a limiting block 221, and the limiting block 221 is located on the sliding path of the slide plate 4, ensuring that the slide plate 4 can slide to abut against the limiting block 221. When the driving member 5 drives the slide plate 4 to slide to abut against the limiting block 221, the second push rod 40 is aligned with the first push rod 3. At this time, the center line of the second push rod 40 coincides with the center line of the first push rod 3. Thus, it is not necessary to strictly set the driving stroke of the driving member 5 to ensure that the positions of the second push rod 40 and the first push rod 3 are aligned. Because when the slide plate 4 moves to abut against the limiting block 221, the limiting block 221 restricts the slide plate 4 from continuing to slide, thus limiting the slide plate 4. At this time, the second push rod 40 is aligned with the first push rod 3 and their center lines coincide, ensuring that the alignment of the second push rod 40 and the first push rod 3 is simple.

[0076] The slide plate 4 has a guide ridge 41 on each side, and the thickness of the guide ridge 41 is less than the thickness of the slide plate 4. The ejector plate 2 has a plurality of spaced guide blocks 222 along the length of the two guide ridges 41. That is, the ejector plate 2 has a plurality of spaced guide blocks 222 along the length of one guide ridge 41 and a plurality of spaced guide blocks 222 along the length of the other guide ridge 41. When the slide plate 4 slides relative to the ejector plate 2, the guide ridges 41 and the plurality of guide blocks 222 move against each other, and the guide blocks 222 restrict the slide plate 4 from detaching from the ejector plate 2. In actual use, multiple spaced guide blocks 222 are set along the length of the two guide strips 41 on both sides of the slide plate 4 instead of a whole guide block 222. This can reduce the contact area between the slide plate 4 and the guide block 222 when sliding, thereby ensuring that the slide plate 4 slides smoothly with little resistance, and can also reduce the machining accuracy requirements of the guide block 222.

[0077] Furthermore, a through groove 220 is provided on the ejector plate 2 along the sliding direction of the slide plate 4. The through groove 220 extends from one side of the ejector plate 2 to the other side of the ejector plate 2, and the through groove 220 is located below the slide plate 4. The through groove 220 allows air to pass through, which can further reduce the resistance when the slide plate 4 slides.

[0078] In practical use, this embodiment provides a limiting block 221 on the ejector plate 2, and the limiting block 221 is located on the sliding path of the slide plate 4. When the driving member 5 drives the slide plate 4 to slide to abut against the limiting block 221, the second push rod 40 aligns with the first push rod 3, and their center lines coincide. The limiting block 221 provides a guarantee for the alignment of the second push rod 40 and the first push rod 3, ensuring that the slide plate 4 does not slide excessively. Multiple spaced guide blocks 222 are provided on the ejector plate 2 along the length direction of the two guide ridges 41 of the slide plate 4. The multiple guide blocks 222 not only provide guidance for the sliding of the slide plate 4, but also restrict the slide plate 4 from detaching from the ejector plate 2, ensuring reliable sliding of the slide plate 4.

[0079] like Figures 1-2 as well as Figures 5-7As shown, in this embodiment, the moving mold frame 1 mainly includes a moving template 10, a first support leg 11, and a second support leg 12. The number of moving templates 10 can be set according to actual needs. The first support leg 11 and the second support leg 12 are supported at intervals below the moving template 10 and are detachably and fixedly connected to the moving template 10. The first support leg 11 and the second support leg 12 can support the weight of the entire die-casting mold. It can be understood that the first support leg 11 and the second support leg 12 are the mold feet of the die-casting mold. The ejector plate 2 is located between the first support leg 11 and the second support leg 12, that is, the ejector plate 2 moves in the area enclosed by the first support leg 11 and the second support leg 12, so as to avoid the movement of the ejector plate 2 being affected by the outside world.

[0080] The moving template 10 has a limiting post 101 detachably and fixedly connected to it at its lower part. The limiting post 101 extends downward from the lower part of the moving template 10. The first support leg 11 and / or the second support leg 12 are provided with a limiting plate 120, which is detachably and fixedly connected to the first support leg 11 and / or the second support leg 12. Preferably, a limiting plate 120 is provided at the bottom of the first support leg 11 and a limiting plate 120 is also provided at the bottom of the second support leg 12. This ensures that when the ejector plate 2 is lowered, the ejector plate 2 is less likely to be subjected to force on one side, ensuring that the force on the ejector plate 2 is balanced and that the die-casting mold is less likely to jam. When the ejector plate 2 is at the upper limit position, the ejector plate 2 abuts against the limiting post 101; when the ejector plate 2 is at the lower limit position, the ejector plate 2 abuts against the limiting plate 120. That is, the upper limit position of the ejector plate 2 is controlled by the limiting post 101, and the lower limit position of the ejector plate 2 is controlled by the limiting plate 120, so that the movement stroke of the ejector plate 2 can be strictly controlled.

[0081] The ejector plate 2 includes a base plate 21 and a panel 22. The panel 22 is disposed on the base plate 21 and is detachably and fixedly connected to the base plate 21. The slide plate 4 is movably disposed on the panel 22. Specifically, multiple guide sleeves 23 are provided between the base plate 21 and the panel 22. Multiple guide posts 102 are provided on the moving template 10. Each guide post 102 corresponds to one of the multiple guide sleeves 23. The guide posts 102 pass through the guide sleeves 23. The cooperation of the multiple guide posts 102 and the multiple guide sleeves 23 guides the lifting and lowering movement of the ejector plate 2 (i.e., the base plate 21 and the panel 22), ensuring reliable lifting and lowering movement of the ejector plate 2 and preventing jamming.

[0082] As an optional implementation, both the base plate 21 and the panel 22 in this embodiment are rectangular, and a guide sleeve 23 is provided at each of the four corners of the base plate 21 and the panel 22, for a total of four guide sleeves 23. Four guide posts 102, corresponding one-to-one with the four guide sleeves 23, are provided on the moving template 10. The four guide posts 102 are movably inserted into the four guide sleeves 23 to guide the lifting and lowering movement of the ejector plate 2 (i.e., the base plate 21 and the panel 22).

[0083] A connecting joint 24 is provided between the base plate 21 and the panel 22. The connecting joint 24 has a first threaded rod 240, which extends from the base plate 21 away from the panel 22. The first threaded rod 240 is configured to connect to the push-pull rod of the die-casting machine. That is, the ejection power input of the entire die-casting mold comes from the push-pull rod on the die-casting machine, which drives the ejector plate 2 to move up and down through the connecting joint 24.

[0084] In this embodiment, a second threaded rod 401 is disposed at one end of the second push rod 40 near the slide plate 4. The slide plate 4 is provided with a threaded hole 42 corresponding to the second threaded rod 401. The second threaded rod 401 is detachably connected to the threaded hole 42, thereby realizing a detachable and fixed connection between the second push rod 40 and the slide plate 4. It can be understood that by replacing the second push rod 40 with different lengths, the stroke of the second push of the first push rod 3 can be controlled. The second push rod 40 is easy to install and remove from the slide plate 4, ensuring that the adjustment of the second push stroke of the first push rod 3 is simple.

[0085] As an alternative implementation, a third push rod (not shown) can also be provided on the slide plate 4 along the sliding direction of the slide plate 4. The length of the third push rod is less than the length of the second push rod 40, and the driving member 5 can drive the third push rod to align with the first push rod 3, or drive the second push rod 40 to align with the first push rod 3.

[0086] In actual use, the user can select the second push rod 40 or the third push rod to transmit the power when the first push rod 3 pushes out for the second time, according to the actual push stroke requirement of the first push rod 3. For example, if the stroke required for the second push stroke of the first push rod 3 is relatively large, the second push rod 40 is selected for transmission; if the stroke required for the second push stroke of the first push rod 3 is relatively small, the third push rod is selected for transmission.

[0087] In a preferred embodiment, the driving component 5 is configured as a hydraulic cylinder. The hydraulic cylinder is detachably and fixedly mounted on the side of the ejector plate 2, and its height is higher than the bottom surface of the ejector plate 2 to prevent the installation of the driving component 5 from affecting the upper mold of the die-casting mold. The sliding plate 4 is connected to the telescopic end of the hydraulic cylinder, and the hydraulic cylinder directly drives the sliding plate 4 to slide through the telescopic end.

[0088] Understandably, as an optional feature in this embodiment, the drive component 5 can also be configured as other power components, such as cylinders, gas springs, and other power components that can drive the slide plate 4 to slide.

[0089] The working principle of the moving mold ejection structure in this embodiment will be explained by combining the mold opening and closing actions of the die-casting mold:

[0090] When the die-casting mold is closed, the ejector plate 2 is in the lower limit position, and the panel 22 of the ejector plate 2 abuts against the limiting plates 120 on both the first support foot 11 and the second support foot 12. At this time, the second ejector rod 40 is in a state of being offset from the first ejector rod 3.

[0091] The die-casting machine forces molten metal into the die-casting mold, and the molten metal fills the cavity of the die-casting mold.

[0092] After the molten metal cools for a certain period of time, the moving mold of the die-casting mold moves away from the fixed mold, the die-casting mold opens, and the molded casting remains on the moving mold side of the die-casting mold.

[0093] After the mold is in place, the push rod on the die casting machine pushes the ejector plate 2, causing the ejector plate 2 to move from its lower limit position to its upper limit position. The first ejector rod 3 ejects once, pushing the formed casting a certain distance out.

[0094] The push-pull rod on the die-casting machine pulls the ejector plate 2, causing the ejector plate 2 to reset downwards a certain distance from its upper limit position, or to reset downwards to its lower limit position.

[0095] The driving component 5 drives the slide plate 4 to slide, which in turn drives the second push rod 40 on the slide plate 4. The slide plate 4 moves until it stops sliding when it abuts against the limit block 221 on the panel 22. At this time, the second push rod 40 on the slide plate 4 is aligned with the first push rod 3, and their center lines coincide.

[0096] The push-pull rod on the die-casting machine pushes the ejector plate 2, causing the ejector plate 2 to move towards its upper limit position. During this process, the upper end of the second ejector rod 40 abuts against the power input end of the first ejector rod 3, causing the first ejector rod 3 to eject a second time, further ejecting the formed casting a certain distance, so that the casting is completely ejected from the moving mold side of the die-casting mold.

[0097] The robotic arm removes the ejected casting.

[0098] The die-casting mold is re-closed to allow for the next round of die-casting.

[0099] This process is repeated to mass-produce die-cast parts.

[0100] In this solution, the moving mold ejection structure of the die-casting mold can effectively increase the ejection stroke, reduce the thickness of the die-casting mold, and ensure that the die-casting mold can be used for die casting on a small-tonnage die-casting machine.

Claims

1. A moving mold ejection structure for a die-casting mold, characterized in that, include: Moving model frame; An ejector plate is disposed on the moving mold frame and has an upper limit position and a lower limit position on the moving mold frame. The ejector plate can move between the upper limit position and the lower limit position. A first ejector rod is inserted into the moving mold frame. The end of the first ejector rod away from the ejector plate is set as the ejector end, and the end of the first ejector rod close to the ejector plate is set as the power input end. A sliding plate and a drive unit, wherein the sliding plate is slidably disposed on the top plate and a second top rod is provided on the sliding plate; the drive unit is disposed on the top plate and connected to the sliding plate, and the drive unit is configured to drive the sliding plate to slide such that the second top rod is misaligned with or aligned with the first top rod. The first push rod is configured to be able to push out at least twice: During one ejection, the second ejector rod is misaligned with the first ejector rod, the ejector plate moves from the lower limit position to the upper limit position, and pushes against the power input end through the ejector plate or the sliding plate, so that the first ejector rod is ejected once; After the first push rod completes one push-out, the push-out plate moves toward the lower limit position side, and the driving member drives the sliding plate to align the second push rod with the first push rod; During the second ejection, the ejection plate moves toward the upper limit position and pushes against the power input end through the second ejector rod, causing the first ejector rod to eject a second time.

2. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The length of the second push rod is less than or equal to the length of the first push rod, and the stroke of the first push rod in one push is greater than the stroke of the first push rod in two pushes.

3. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The ejector plate is provided with a limiting block, and the limiting block is located on the sliding path of the slide plate; When the driving member drives the slide plate to slide against the limiting block, the second push rod is aligned with the first push rod. At this time, the center line of the second push rod coincides with the center line of the first push rod.

4. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The skateboard has a guide strip on each side; The ejector plate is provided with a plurality of spaced guide blocks along the length of the two guide protrusions. When the slide plate slides relative to the ejector plate, the guide protrusions and the plurality of guide blocks move against each other, and the guide blocks restrict the slide plate from detaching from the ejector plate.

5. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The ejector plate has a through groove along the sliding direction of the slide plate. The through groove extends from one side of the ejector plate to the other side of the ejector plate, and the through groove is located below the slide plate.

6. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The top surface of the skateboard is set as a plane, the top surface of the second push rod is set as a plane, and the bottom surface of the first push rod is set as a plane; The diameter of the second push rod is greater than or equal to the diameter of the first push rod, and the width of the slide plate is greater than the diameter of the first push rod and also greater than the diameter of the second push rod.

7. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The moving mold frame includes a moving template, a first support leg, and a second support leg. The first and second support legs are spaced apart and supported below the moving template, and are detachably and fixedly connected to the moving template. The ejector plate is located between the first and second support legs. The moving template is provided with a limiting post below it that is detachably and fixedly connected to it. The first support foot and / or the second support foot is provided with a limiting plate. When the ejector plate is in the upper limit position, the ejector plate abuts against the limiting post; when the ejector plate is in the lower limit position, the ejector plate abuts against the limiting plate.

8. The moving mold ejection structure of the die-casting mold according to claim 7, characterized in that, The top plate includes a base plate and a front plate. The front plate is disposed on the base plate and is detachably and fixedly connected to the base plate. The sliding plate is movably disposed on the front plate. Multiple guide sleeves are provided between the base plate and the panel, and multiple guide posts are provided on the moving template. Each guide post corresponds to one of the multiple guide sleeves, and the guide posts pass through the guide sleeves. A connecting joint is provided between the base plate and the panel. The connecting joint has a first threaded rod that extends from the base plate toward the side away from the panel. The first threaded rod is configured to be connected to the push-pull rod of the die-casting machine.

9. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The second push rod is provided with a second threaded rod at one end near the slide plate, and the slide plate is provided with a threaded hole corresponding to the second threaded rod, and the second threaded rod is detachably connected to the threaded hole.

10. The moving mold ejection structure of the die-casting mold according to claim 1, characterized in that, The driving component is configured as a hydraulic cylinder, which is detachably fixedly installed on the side of the top plate, and the height of the hydraulic cylinder is higher than the height of the bottom surface of the top plate. The sliding plate is connected to the telescopic end of the hydraulic cylinder.

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