Ejection mechanism of sheet profile semi-solid die-casting die and die-casting die

Abstract

The utility model discloses an ejection mechanism of a sheet profile semi-solid die-casting mold and the die-casting mold. The ejection mechanism comprises an upper mold, a lower mold, a top mold plate, a plurality of first ejection rods, a plurality of second ejection rods and a driving unit, an upper concave position is formed on the lower surface of the upper die, a lower concave position is formed on the upper surface of the lower die, and a plurality of downwards concave grooves are distributed on the bottom surface of the lower concave position; the upper concave position and the lower concave position jointly form a cavity, and a runner is arranged between the lower die and the upper die; a plurality of first through holes and a plurality of second through holes are formed in the lower die; the lower ends of the first ejector rods and the lower ends of the second ejector rods are fixed to the top mold plate, the first ejector rods are connected into the first through holes in a penetrating mode in a one-to-one correspondence mode, the second ejector rods are connected into the second through holes in a penetrating mode in a one-to-one correspondence mode, the diameter of the top faces of the first ejector rods is R1, the diameter of the top faces of the second ejector rods is R2, and R1 is larger than R2. According to the utility model, the local deformation of the workpiece when the workpiece is ejected due to the bonding of the workpiece and the bottom surface of the concave position is avoided, and the workpiece is prevented from being ejected through.

Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, in particular to an ejection mechanism of a semi-solid die-casting die for a sheet-shaped profile and a die-casting die. Background Art

[0002] The metal die-casting process is to inject semi-solid metal slurry into the mold cavity by injection, and then cool the metal slurry in the mold cavity to form the workpiece. The metal die-casting process is widely used in the shell processing of electronic devices such as laptops and mobile phones in the 3C industry due to its advantages of good density, high strength, high surface flatness and less subsequent processing. When using die-casting molds to process sheet profiles such as electronic device shells, due to the relatively small thickness of the product, for example, the thickness of some laptop computer back panels is often less than 0.8mm, when the ejector mechanism is used to push the workpiece upward, it is very easy to penetrate the workpiece and cause damage to the workpiece. Utility Model Content

[0003] The main purpose of the utility model is to provide an ejection mechanism of a semi-solid die-casting die for sheet-shaped profiles and a die-casting die, so as to prevent the workpiece from being deformed or penetrated when being ejected, and to improve the yield of the workpiece.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An ejection mechanism of a semi-solid die-casting mold for sheet-shaped profiles, comprising an upper mold, a lower mold, an ejection mold plate, a plurality of first ejector rods, a plurality of second ejector rods, and a driving unit;

[0006] An upper concave is formed on the lower surface of the upper mold, and a lower concave is formed on the upper surface of the lower mold. A plurality of grooves are distributed on the bottom surface of the lower concave. After the upper mold and the lower mold are closed, the upper concave and the lower concave together form a cavity. A flow channel connecting the cavity is provided between the lower mold and the upper mold to inject the semi-solid metal slurry into the cavity. The lower mold is provided with a plurality of first through holes extending downward from the bottom surface of the lower concave to the lower surface of the lower mold, and a plurality of second through holes extending downward from the bottom surface of the groove to the lower surface of the lower mold.

[0007] The lower ends of multiple first push rods and second push rods are fixed on the top template, the multiple first push rods are connected to the multiple first through holes one by one, and the multiple second push rods are connected to the multiple second through holes one by one. The top surface diameter of the first push rods is R1, and the top surface diameter of the second push rods is R2, wherein R1 is greater than R2, and the driving unit is used to drive the top template to move up and down so that the first push rod moves between a first position extending into the lower recess and a second position accommodated in the first through hole, and so that the second push rod moves between a third position extending into the groove and a fourth position accommodated in the second through hole.

[0008] Preferably, the distance between the top surface of the upper concave position and the bottom surface of the lower concave position is D1, and the ratio of D1 to R1 is 0.1 to 0.16;

[0009] The distance between the top surface of the upper concave position and the bottom surface of the groove is D2, and the ratio of D2 to R2 is 1.2 to 1.5.

[0010] Preferably, the lower ends of the first push rod and the second push rod are both provided with flanges protruding radially outward, the top template includes an upper top template and a lower top template, and the upper top template and the lower top template are fixed together by bolts; the first push rod and the second push rod are both inserted into the through holes preset on the upper top template, and the flanges are clamped and fixed between the upper top template and the lower top template.

[0011] Preferably, the lower recess includes a first edge, a second edge opposite to the first edge, and two side edges respectively connected between the two ends of the first edge and the second edge, and a feed port connected to the flow channel is provided on the first edge; a first venting groove is formed on the upper surface of the lower mold, one end of the first venting groove extends to the second edge to be connected to the cavity, and the other end extends to the edge of the lower mold, and an overflow groove formed by a downward depression is provided on the bottom surface of the first venting groove.

[0012] Preferably, the upper surface of the lower mold is provided with a second exhaust groove extending from the side of the lower recess to the edge of the lower mold.

[0013] Preferably, a lower mold insert is fixedly connected to the front end of the lower mold, an upper mold insert is fixedly connected to the front end of the upper mold, and the flow channel is located between the upper mold insert and the lower mold insert.

[0014] Preferably, in the direction from outside to inside of the flow channel, the height of the flow channel gradually decreases and the width of the flow channel gradually increases, and the inner end of the flow channel extends from one end of the first side of the lower recess to the other end of the first side.

[0015] Preferably, an upper guide slope is formed between the top surface of the flow channel and the feed port, and the upper guide slope gradually tilts downward in the direction of the flow channel from outside to inside; a lower guide slope is formed between the bottom surface of the flow channel and the feed port, and the lower guide slope gradually tilts upward in the direction of the flow channel from outside to inside.

[0016] Preferably, a plurality of protrusions are provided on the bottom surface of the first exhaust groove at a position located at the rear side of the overflow groove, and the plurality of protrusions are arranged at intervals along the width direction of the first exhaust groove.

[0017] A semi-solid die-casting mold for sheet-like profiles comprises the ejection mechanism of the semi-solid die-casting mold for sheet-like profiles.

[0018] In the utility model, a plurality of first ejector pins with a larger top surface diameter correspond to positions where the spacing between the top and the bottom of the cavity is relatively small, that is, positions where the thickness of the workpiece is relatively thin; a plurality of second ejector pins with a smaller top surface diameter correspond to positions where the spacing between the top and the bottom of the cavity is relatively large, that is, positions where the thickness of the workpiece is relatively thick. In this way, a plurality of first ejector pins and a plurality of second ejector pins can be densely distributed within the range covered by the cavity. When the workpiece is lifted upward from the cavity, adhesion between the workpiece and the bottom surface of the lower recess is avoided, resulting in local deformation of the workpiece when it is ejected. Moreover, the first ejector pin with a larger top surface diameter corresponds to a position where the thickness of the workpiece is thinner, and the contact surface between the first ejector pin and the workpiece is relatively large, which can prevent the thrust force applied to the surface of the workpiece when the first ejector pin contacts the workpiece from being too concentrated, and prevent the workpiece from being pierced through, so that the die-casting mold can be suitable for processing workpieces with thin thickness, thereby increasing the application range of the die-casting mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the assembly of the utility model;

[0022] Figure 3 for Figure 2 AA section view;

[0023] Figure 4 for Figure 3 Magnified view at B in the middle;

[0024] Figure 5 for Figure 3 Enlarged view at center C;

[0025] Figure 6 for Figure 2 Schematic diagram of the structure of the middle and lower molds;

[0026] Figure 7 for Figure 3 E-direction view.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] like Figure 1 , 2, 3, 4, 5, 6, and 7 show an ejection mechanism of a semi-solid die-casting mold for sheet-shaped profiles of the utility model, which includes an upper mold 20, a lower mold 10, an ejector mold plate, a plurality of first ejector rods 54, a plurality of second ejector rods 55, and an oil cylinder 51; the lower surface of the upper mold 20 is recessed upward to form an upper concave position 21, the upper surface of the lower mold 10 is recessed downward to form a lower concave position 11, and a plurality of concave bottom surfaces 111 of the lower concave position 11 are recessed downward to form a plurality of concave bottom surfaces 111 of the lower concave position 11. The groove 12, after the upper mold 20 and the lower mold 10 are molded together, the lower surface of the upper mold 20 is fitted with the upper surface of the lower mold 10, and the upper concave position 21 and the lower concave position 11 together constitute the cavity 30 of the die casting mold. At the same time, a flow channel 40 is formed between the upper mold 20 and the lower mold 10, and the flow channel 40 is connected with the cavity 30. The injection molding machine can inject the semi-solid metal slurry from the flow channel 40 into the cavity 30; the lower mold 10 is provided with a plurality of bottom surfaces 11 formed by the concave positions 11. 1 extends downward to the first through hole 13 in the lower surface of the lower mold 10, and at the same time, the lower mold 10 is also provided with a plurality of second through holes 14 extending downward from the bottom surface 121 of the groove 12 to the lower surface of the lower mold 10, and the inner diameter of the first through hole 13 is greater than the inner diameter of the second through hole 14; the top mold plate is located below the lower mold 10, and the lower ends of the plurality of first ejector pins 54 and the plurality of second ejector pins 55 are fixedly connected to the top mold plate, and the first ejector pins 54 and the second ejector pins 55 extend upward along the height direction, and the plurality of first ejector pins 54 are connected to the plurality of first through holes 13 one by one, and the plurality of second ejector pins 55 are connected to the plurality of second through holes 14 one by one, and the top surface of the first ejector pins 54 is flush with the bottom surface 111 of the lower recess 11 or slightly lower than the bottom surface 111 of the lower recess 11, and the top surface of the second ejector pins 55 is flush with the bottom surface 121 of the groove 12 or slightly lower than the bottom surface 121 of the groove 12; see Figure 4 , the top surface diameter of the first push rod 54 is R1, and the top surface diameter of the second push rod 55 is R2, wherein R1 is greater than R2; the oil cylinder 51 is used to drive the top template to move up and down, so that the first push rod 54 moves between a first position extending into the lower recess 11 and a second position received in the first through hole 13, and the second push rod 55 moves between a third position extending into the groove 12 and a fourth position received in the second through hole 14; specifically, it is placed below the top template, and its telescopic rod is fixedly connected to the top template upward, and after the metal slurry is solidified and formed inside the cavity 30, the upper mold 20 and the lower mold 20 are connected. The mold 10 is opened, and the cylinder 51 is started. The cylinder 51 is used to drive the top template to move upward, so that the multiple first push rods 54 and the second push rods 55 fixed on the top template move upward at the same time, until the top surface of the first push rod 54 exceeds the bottom surface 111 of the lower recess 11, and the top surface of the second push rod 55 exceeds the bottom surface 121 of the groove 12, so as to push the sheet profile formed in the cavity 30 upward out of the lower recess 11. After completing the ejection action, the cylinder 51 drives the top template to move downward, so that the first push rod 54 is accommodated in the first through hole 13, and the second push rod 55 is accommodated in the second through hole 14.

[0032] In the ejection mechanism of the utility model, the multiple first ejector pins 54 with larger top surface diameters correspond to the positions where the spacing between the top and the bottom of the cavity 30 is relatively small, that is, the positions where the thickness of the workpiece is relatively thin, and the multiple second ejector pins 55 with smaller top surface diameters correspond to the positions where the spacing between the top and the bottom of the cavity 30 is relatively large, that is, the positions where the thickness of the workpiece is relatively thick. In this way, the multiple first ejector pins 54 and the multiple second ejector pins 55 can be densely distributed within the range covered by the cavity 30, and when the workpiece is lifted upward from the cavity 30, it is avoided that the workpiece adheres to the bottom surface of the lower recess 11, causing local deformation of the workpiece when being ejected. In addition, the first ejector pins 54 with larger top surface diameters correspond to the positions where the thickness of the workpiece is thinner, and the contact surface between the first ejector pins 54 and the workpiece is relatively large, which can prevent the ejection force applied to the surface of the workpiece by the first ejector pins 54 from being too concentrated when contacting the workpiece, and prevent the workpiece from being pierced through, so that the die-casting mold can be suitable for the processing of thinner workpieces, thereby increasing the application range of the die-casting mold.

[0033] See also Figure 4 As shown, in a preferred embodiment, the distance between the top surface 211 of the upper concave position 21 and the bottom surface 111 of the lower concave position 11 of the utility model is D1, that is, the height of the position corresponding to the first ejector 54 inside the cavity 30 is D1, wherein the ratio of D1 to R1 is 0.1 to 0.16. For example, the thickness of the main part of the sheet profile to be processed is the above-mentioned D1. When D1 is specifically 0.8 mm, the diameter R1 of the top surface of the first ejector 54 is in the range of 5 to 8 mm; the distance between the top surface 211 of the upper concave position 21 and the bottom surface 121 of the groove 12 is D2 That is to say, the height of the cavity 30 at the position corresponding to the second ejector 55 is D2, wherein the ratio of D2 to R2 is 1.2 to 1.5, and the position where the groove 12 is arranged at the bottom of the lower recess 11 corresponds to the protruding structure on the sheet profile. When D2 is 3 mm, the top surface diameter R2 of the second ejector 55 is in the range of 2 to 2.5 mm. Reasonable setting of the top surface diameter R1 of the first ejector 54 and the top surface diameter R2 of the second ejector 55 can make the first ejector 54 and the second ejector 55 evenly arranged within the range covered by the cavity 30 to prevent the workpiece from being deformed when being ejected.

[0034] See also Figure 1 , 2As shown in Figure 4, in another preferred embodiment, the lower ends of the first push rod 54 and the second push rod 55 are both provided with flanges 56 protruding radially outward, and the top template includes an upper top template 53 and a lower top template 52. The upper top template 53 and the lower top template 52 are fixed together by multiple bolts, and the first push rod 54 and the second push rod 55 both pass through the preset through holes on the upper top template 53 from bottom to top. The flange 56 cannot pass through the through hole so that the flange 56 can be pressed against the bottom of the upper top template 53, and the flange 56 is clamped and fixed between the upper top template 53 and the lower top template 52, so that the first push rod 54 and the second push rod 55 are fixed together with the top template, and the top template is pushed up and down by the oil cylinder 51, so that the multiple first push rods 54 and the second push rods 55 move up and down synchronously with the top template. The second push rod 55 can be configured as a variable diameter structure, with the upper portion of the second push rod 55 penetrating into the second through hole 14 having a relatively small diameter, and the lower portion having the same diameter as the first push rod 54, thereby preventing the second push rod 55 from having a defect of being too small in diameter and being easily deformed. It should be noted that the driving unit of the utility model for driving the top template to move up and down is not limited to the above-mentioned cylinder 51, and it can also be other forms of hydraulic cylinders, oil cylinders or other driving units that can drive the top template to move up and down.

[0035] like Figure 3 , 5, 6, and 7, the lower concave portion 11 includes a first edge 113, a second edge 112 opposite to the first edge 113, and two side edges 114 respectively connected between the first edge 113 and the second edge 112 at both ends. The first edge 113 is provided with a feed port connected to the flow channel 40 so that the semi-solid metal slurry in the flow channel 40 can flow into the cavity 30; a first exhaust groove 115 is formed on the upper surface of the lower mold 10, one end of the first exhaust groove 115 extends to the second edge 112 to communicate with the cavity 30, and the other end extends to At the edge of the lower mold 10, the air inside the cavity 30 can be discharged to the external environment through the first exhaust groove 115. A downwardly recessed overflow groove 116 is provided on the bottom surface of the first exhaust groove 115. The overflow groove 116 is used to accommodate excess semi-solid metal slurry overflowing from the cavity 30. The overflow groove 116 extends downward from the bottom surface of the first exhaust groove 115, which can prevent the semi-solid metal slurry from flowing into the first exhaust groove 115, thereby ensuring that the first exhaust groove 115 can normally exhaust the air inside the cavity 30. A second exhaust groove 117 extending from the side 114 of the lower recess 11 to the edge of the lower mould 10 is further provided on the upper surface of the lower mould 10. In this way, the first exhaust groove 115 and the second exhaust grooves 117 on both sides of the lower recess 11 respectively exhaust the cavity 30 at the position where the cavity 30 is opposite to the runner 40 and on both sides of the cavity 30, thereby increasing the exhaust paths of the cavity 30. In addition, a plurality of exhaust paths are arranged around the periphery of the cavity 30 (except one side of the runner 40), so that all parts of the cavity can be evenly exhausted to prevent the formation of bubbles inside the workpiece after molding, thereby ensuring that the workpiece has better density.

[0036] A lower mold insert 13 is fixedly connected to the front end of the lower mold 10, and an upper mold insert 22 is fixedly connected to the front end of the upper mold 20. The flow channel 40 is located between the upper mold insert 22 and the lower mold insert 13. Specifically, the lower surface of the upper mold insert 22 is recessed upward to form a recess 221, and the upper surface of the lower mold insert 13 is recessed downward to form a recess 131. The recess 221 and the recess 131 together constitute the flow channel 40. In the direction from the outside to the inside of the runner 40 (i.e., from the outside of the die-casting mold to the direction of the cavity 30), the height of the runner 40 gradually decreases and the width of the runner 40 gradually increases, so that the inner end of the runner 40 extends from one end of the first side 113 of the lower concave position 11 to the other end of the first side 113 of the lower concave position 11, and the internal shape of the runner 40 is set to the above-mentioned gradual structure. The internal shape of the runner 40 can better guide the semi-solid metal slurry, and finally at the inner end of the runner 40, the semi-solid metal slurry flows evenly into the cavity 30 in the length direction of the first side 113, so that the semi-solid metal slurry entering the cavity 30 can be evenly distributed inside the cavity 30. Figure 7As shown in , the height of the flow channel 40 gradually decreases from the height H1 of the outer end to the height H2 of the inner end, and the width of the flow channel 40 gradually increases from the width W1 of the outer end to the width W2 of the inner end. An upper guide slope 222 is formed between the top surface of the flow channel 40 and the feed port. In the direction from the outside to the inside of the flow channel 40, the upper guide slope 222 is inclined downward. A lower guide slope 132 is formed between the bottom surface of the flow channel 40 and the feed port. In the direction from the outside to the inside of the flow channel, the lower guide slope 132 gradually inclines upward. Through the upper guide slope 222 and the lower guide slope 132, a necking portion is formed at the inner end of the flow channel 40, so that the change rate of the height of the flow channel 40 in the necking portion increases. When the semi-solid metal slurry is in the necking portion, the pressure increases, so that the semi-solid metal slurry can be injected into the cavity 30 in a manner similar to injection, so that the semi-solid metal slurry is evenly arranged inside the cavity 30.

[0037] A plurality of protrusions 1151 are provided on the bottom surface of the first exhaust groove 115, and the plurality of protrusions 1151 are located on the rear side of the overflow groove 116 and are arranged at intervals in the width direction of the first exhaust groove 115; when a large amount of semi-solid metal slurry overflows from the cavity 30, the liquid level of the semi-solid metal slurry inside the overflow groove 115 rises to be higher than the bottom surface of the first exhaust groove 115, and at this time, the plurality of protrusions 1151 can block the semi-solid metal slurry in the overflow groove 115, so as to slow down the speed at which the semi-solid metal slurry enters the first exhaust groove 115, so that the first exhaust groove 115 can normally discharge the air inside the cavity 30.

[0038] The semi-solid die-casting mold for sheet-like profiles of the utility model comprises the ejection mechanism of the semi-solid die-casting mold for sheet-like profiles described above, and other structures of the die-casting mold adopt the existing technology, so they are not described in detail here.

[0039] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. The ejection mechanism of the semi-solid die-casting mold for sheet profiles is characterized by: It includes an upper mold, a lower mold, a top mold plate, a plurality of first ejector rods, a plurality of second ejector rods, and a driving unit; An upper concave is formed on the lower surface of the upper mold, and a lower concave is formed on the upper surface of the lower mold. A plurality of grooves are distributed on the bottom surface of the lower concave. After the upper mold and the lower mold are closed, the upper concave and the lower concave together form a cavity. A flow channel connecting the cavity is provided between the lower mold and the upper mold to inject the semi-solid metal slurry into the cavity. The lower mold is provided with a plurality of first through holes extending downward from the bottom surface of the lower concave to the lower surface of the lower mold, and a plurality of second through holes extending downward from the bottom surface of the groove to the lower surface of the lower mold. The lower ends of multiple first push rods and second push rods are fixed on the top template, the multiple first push rods are connected to the multiple first through holes one by one, and the multiple second push rods are connected to the multiple second through holes one by one. The top surface diameter of the first push rods is R1, and the top surface diameter of the second push rods is R2, wherein R1 is greater than R2, and the driving unit is used to drive the top template to move up and down so that the first push rod moves between a first position extending into the lower recess and a second position accommodated in the first through hole, and so that the second push rod moves between a third position extending into the groove and a fourth position accommodated in the second through hole.

2. The ejection mechanism of the semi-solid die-casting mold for sheet-like profiles according to claim 1, characterized in that: The distance between the top surface of the upper concave position and the bottom surface of the lower concave position is D1, and the ratio of D1 to R1 is 0.1-0.16; the distance between the top surface of the upper concave position and the bottom surface of the groove is D2, and the ratio of D2 to R2 is 1.2-1.

5.

3. The ejection mechanism of the semi-solid die-casting mold for sheet-like profiles according to claim 1, characterized in that: The lower ends of the first push rod and the second push rod are both provided with flanges protruding radially outward, and the top template includes an upper top template and a lower top template, and the upper top template and the lower top template are fixed together by bolts; the first push rod and the second push rod are both connected to the through holes preset on the upper top template, and the flanges are clamped and fixed between the upper top template and the lower top template.

4. The ejection mechanism of the semi-solid die-casting mold for sheet-like profiles according to claim 1, characterized in that: The lower recess includes a first edge, a second edge opposite to the first edge, and two side edges respectively connected between the two ends of the first edge and the second edge, and a feed port connected to the flow channel is provided on the first edge; a first venting groove is formed on the upper surface of the lower mold, one end of the first venting groove extends to the second edge to be connected to the cavity, and the other end extends to the edge of the lower mold, and an overflow groove formed by a downward depression is provided on the bottom surface of the first venting groove.

5. The ejection mechanism of the semi-solid die-casting mold for sheet-like profiles according to claim 4, characterized in that: The upper surface of the lower mold is provided with a second exhaust groove extending from the side of the lower concave position to the edge of the lower mold.

6. The ejection mechanism of the semi-solid die-casting mold for sheet-like profiles according to claim 4, characterized in that: The front end of the lower die is fixedly connected with a lower die insert, the front end of the upper die is fixedly connected with an upper die insert, and the flow channel is located between the upper die insert and the lower die insert.

7. The ejection mechanism of the semi-solid die-casting mold for sheet-like profiles according to claim 6, characterized in that: In the direction from outside to inside of the flow channel, the height of the flow channel gradually decreases and the width of the flow channel gradually increases, and the inner end of the flow channel extends from one end of the first side of the lower concave position to the other end of the first side.

8. The ejection mechanism of the semi-solid die-casting mold for sheet-like profiles according to claim 7, characterized in that: An upper guide slope is formed between the top surface of the flow channel and the feed port, and the upper guide slope gradually tilts downward in the direction of the flow channel from outside to inside; a lower guide slope is formed between the bottom surface of the flow channel and the feed port, and the lower guide slope gradually tilts upward in the direction of the flow channel from outside to inside.

9. The ejection mechanism of the semi-solid die-casting mold for sheet-shaped profiles according to claim 4, characterized in that: A plurality of protrusions are arranged on the bottom surface of the first exhaust groove at a position located at the rear side of the overflow groove, and the plurality of protrusions are arranged at intervals along the width direction of the first exhaust groove.

10. A semi-solid die-casting mold for sheet-shaped profiles, characterized in that: The invention comprises an ejection mechanism of a semi-solid die-casting mold for sheet-like profiles as described in any one of claims 1 to 9.

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