Metal die casting forming die

Abstract

The utility model discloses a metal die casting forming die, a lower die comprises a lower die holder and a lower die core embedded in the lower die holder, the lower die core comprises a lower die core and a plurality of groups of exhaust modules arranged around the lower die core, a plurality of reinforcing rib grooves are concavely arranged on the lower die core, and each group of exhaust modules extends from the lower die core to the edge of the lower die core; an upper mold comprises an upper mold base and an upper mold core embedded in the upper mold base, the upper mold core comprises an upper mold core and a pouring gate penetrating through the upper mold core, the upper mold core and a lower mold core are matched to form a forming cavity, and the forming cavity is communicated with each group of exhaust modules. The pouring gate of the mold adopts a large-nozzle feeding mode, so that the thickness of the main wall at the position where the reinforcing rib is arranged on the product is increased, the filling and pressure transfer feeding of the thick and solid wall position of the product are improved, and the filling speed is increased, so that the problem of shrinkage of the surface of the product is effectively solved, and the appearance of the surface of the product is free of shrinkage marks; and the plurality of groups of exhaust modules have the effects of exhausting and discharging cold materials, so that the periphery and the surface of the product are free of cold materials and cold lines.

Description

Technical Field

[0001] The utility model relates to the technical field of mold processing, in particular to a metal die-casting forming mold which can ensure that the product appearance has no shrinkage effect. Background Art

[0002] With the development of new electronic technologies, the quality and assembly requirements for electronic central control screens are becoming increasingly stringent, and product structures are becoming increasingly complex. For example, in-vehicle central control screens are pursuing large screen sizes to meet sensory and visual comfort requirements. At the same time, the design and production of decorative metal hardware components, such as the screen bracket, are also subject to higher standards to meet visual aesthetic requirements. Currently, lightweight magnesium alloy die-cast screen brackets are commonly used for in-vehicle central control screens. When these die-cast screen brackets are installed in the vehicle, they not only require high mechanical performance but also high visual comfort.

[0003] However, the existing metal die casting products, the wall thickness of the reinforcing rib structure and the main wall thickness of the product are not uniform, the main wall thickness of the product is relatively thin, see Figure 15 As shown. The forming mold adopts a small nozzle feeding method, so the feeding is small, resulting in the main wall thickness of the product cooling and solidifying quickly during the die casting process, and the filling of the thick wall with reinforcing ribs and the insufficient pressure transmission and shrinkage compensation, resulting in obvious shrinkage marks on the product surface and concave shrinkage marks on the product. Figure 16 In addition, the exhaust fins of the existing forming mold are arranged in a ring shape around the forming cavity, which has a poor effect of discharging cold materials, causing the product to have pores and affecting the quality.

[0004] Therefore, it is necessary to provide a metal die casting forming die that can enable the product to meet customer assembly requirements and reduce shrinkage to meet visual appearance requirements to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a metal die-casting forming die which can make the product meet the customer's assembly requirements and reduce shrinkage to meet the visual appearance requirements.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows: to provide a metal die-casting forming mold, which includes a matching upper mold and a lower mold; wherein, the lower mold includes a lower mold base and a lower mold core embedded in the lower mold base, the lower mold core includes a lower mold core and multiple groups of exhaust modules arranged around the lower mold core, the lower mold core is recessed with multiple reinforcing rib grooves, and each group of the exhaust modules extends from the lower mold core to the edge of the lower mold core; the upper mold includes an upper mold base and an upper mold core embedded in the upper mold base, the upper mold core includes an upper mold core and a gate passing through the upper mold core; the upper mold core and the lower mold core cooperate to form a molding cavity, and the molding cavity is connected to each group of the exhaust modules.

[0007] Preferably, the lower mold core includes a first molding surface and a raised portion protruding from the first molding surface, the raised portion is surrounded by a groove, and the reinforcing rib groove is at least recessed in the raised portion and connected to the groove.

[0008] Preferably, part of the reinforcing rib groove extends from the protruding portion to the first forming surface.

[0009] Preferably, each of the reinforcing rib grooves is radially arranged around the protrusion, that is, extending from the protrusion to the edge of the lower mold core.

[0010] Preferably, the raised portion includes a first side wall, a second side wall arranged inside the first side wall, and a top wall connected between the first side wall and the second side wall. The interior of the second side wall forms the groove, and the reinforcing rib groove is formed by being recessed downward perpendicular to the top wall.

[0011] Preferably, the first side wall is arranged at an angle, and the connection position between the first side wall and the first forming surface is an arc-shaped transition.

[0012] Preferably, the second side wall is arranged vertically.

[0013] Preferably, the upper mold core includes a second molding surface, a recessed portion recessed in the second molding surface, a protrusion is provided in the recessed portion, the second molding surface cooperates with the first molding surface, the recessed portion cooperates with the raised portion, and the protrusion cooperates with the groove.

[0014] Preferably, the gate is arranged corresponding to the groove, and the reinforcing rib groove extends from the raised portion to the edge of the lower mold core. Therefore, the gate with a larger diameter feeds from the middle of the molding cavity and forms a large nozzle feeding method, thereby increasing the main wall thickness of the position where the reinforcing rib is set on the product. At the same time, during molding, the filling of the thick main wall position of the product and the pressure transmission and shrinkage compensation are improved, thereby increasing the filling speed, thereby effectively solving the shrinkage problem of the product surface, making the product surface appearance without shrinkage marks, and improving product quality.

[0015] Preferably, each group of the exhaust modules includes a plurality of exhaust strips arranged at intervals, and each of the exhaust strips is connected to the forming cavity and extends from the edge of the lower mold core to the edge of the lower mold core, that is, the extension direction of each exhaust strip is consistent with the extension direction of the reinforcing rib groove, so that under the large nozzle feeding method, the exhaust and cold material discharge effects of each exhaust strip are better, so that there is no cold material or cold lines around and on the surface of the product, thereby improving product quality.

[0016] Compared with the prior art, the metal die-casting mold of the present invention expands the outer diameter of the gate, thereby forming a large-mouth feeding method. When forming the product, the main wall thickness of the product where the reinforcing ribs are set is thickened, and the filling of the thick wall area of the product and the pressure transmission compensation are improved, thereby increasing the filling speed, thereby effectively solving the shrinkage problem of the product surface and making the product surface appearance without shrinkage marks. At the same time, multiple groups of exhaust modules are arranged around the lower mold core. Each group of exhaust modules is connected to the molding cavity and extends from the lower mold core to the edge of the lower mold core, thereby improving the exhaust and cold material removal effect under the large-mouth feeding method, and eliminating cold material and cold lines around the product and on the surface. As a result, the die-cast products have higher quality, not only solving the problem of poor paint appearance, but also meeting customer assembly and visual appearance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a metal die-casting forming die of the present utility model.

[0018] Figure 2 yes Figure 1 Exploded diagram of .

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle and upper mold core.

[0020] Figure 4 yes Figure 3 Schematic diagram of the structure from another angle.

[0021] Figure 5 yes Figure 2 Schematic diagram of the structure of the middle and lower mold cores.

[0022] Figure 6 yes Figure 5 Schematic diagram of the structure from another angle.

[0023] Figure 7 yes Figure 6 Schematic diagram of the structure of the middle raised part.

[0024] Figure 8 yes Figure 1 sectional view of .

[0025] Figure 9 is through Figure 1 Schematic diagram of the front structure of the shell obtained by mold forming.

[0026] Figure 10 yes Figure 9 Schematic diagram of the back structure of the middle shell.

[0027] Figure 11 yes Figure 9 Top view of .

[0028] Figure 12 It is along Figure 11 Sectional view along line AA.

[0029] Figure 13 yes Figure 12 A partial enlarged schematic diagram.

[0030] Figure 14 is through Figure 1 The product effect diagram of the shell obtained by mold forming in the figure.

[0031] Figure 15 It is a partial cross-sectional view of a shell in the prior art.

[0032] Figure 16 This is a product rendering of a shell in the prior art. DETAILED DESCRIPTION

[0033] The embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element numbers represent similar elements. It should be noted that the orientation descriptions involved in the present invention, such as the orientations or positional relationships indicated by up, down, left, right, front, and back, are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present application or / and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. The first, second, etc. described are only used to distinguish technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] Combine Figures 1-13 As shown, the metal die-casting mold 1 provided by the present invention is primarily used to form the metal die-casting front housing of a vehicle-mounted rotating screen. Of course, the mold 1 is not limited to the molding of housings used for vehicle-mounted central control screens; other similar metal die-casting parts can also be designed with reference to the mold 1 of the present invention.

[0035] The following combination Figures 1-8As shown in the figure, in the present invention, the metal die casting mold 1 includes an upper mold 100 and a lower mold 200 that match each other. The upper mold 100 includes an upper mold base 120 and an upper mold core 110 embedded in the upper mold base 120; the lower mold 200 includes a lower mold base 220 and a lower mold core 210 embedded in the lower mold base 220. When the upper mold 100 is pressed against the lower mold 200, the upper mold base 120 and the lower mold base 220 are pressed together, and the upper mold core 110 and the lower mold core 210 match to form a molding cavity 300, as shown in FIG. Figure 8 The molding cavity 300 is set according to the molding requirements of the product. In the present invention, the main wall thickness of the metal die casting 2 to be molded at the location where the reinforcing ribs are set needs to be thickened. Therefore, the molding cavity 300 is set accordingly.

[0036] Combine Figure 2-4 、 Figure 8 As shown, in the present invention, the upper mold core 110 includes an upper mold core 111 provided in the middle thereof, and the upper mold core 111 is provided with a gate 112 connected to the molding cavity 300, and the diameter of the gate 112 is larger than the gate of the mold in the prior art, so that the molding mold 1 of the present invention is designed as a large nozzle feeding method. Correspondingly, an injection port connected to the gate 112 is provided on the upper mold base 120. The components provided on the molding mold 1 for sealing the injection port and the gate 112 are conventional structures in the field and are not described in detail. When molding metal die-castings 2, the large nozzle feeding method can increase the filling speed of the position where the reinforcing ribs are set, and improve the filling and pressure transmission shrinkage compensation, thereby effectively solving the surface shrinkage problem of the metal die-castings 2, making the appearance of the metal die-castings 2 without shrinkage marks, and improving product quality.

[0037] The following combination Figure 2 、 Figure 5-7 As shown, in the present invention, the lower mold core 210 includes a lower mold core 211 and a plurality of exhaust modules 212 arranged around the lower mold core 211. The lower mold core 211 is provided with a plurality of reinforcing rib grooves 2114, each of which is arranged along the radial direction of the lower mold core 211. Specifically, the reinforcing rib grooves 2114 extend from the middle of the lower mold core 211 to its edge, and each of the reinforcing rib grooves 2114 is arranged radially around the gate 112. The lengths of the reinforcing rib grooves 2114 on the projection surface of the lower mold core 211 can be the same or different, and can be flexibly arranged according to specific needs. The reinforcing rib grooves 2114 are used to form reinforcing ribs.

[0038] More specifically, each set of exhaust modules 212 extends from the edge of the lower mold core 211 to the edge of the lower mold core 210. In other words, the extension direction of the exhaust modules 212 is consistent with the extension direction of the reinforcing rib grooves 2114. In addition, each set of exhaust modules 212 includes a plurality of exhaust strips 2121 arranged at intervals. Each exhaust strip 2121 is connected to the molding cavity 300. In other words, each exhaust strip 2121 extends from the edge of the lower mold core 211 to the edge of the lower mold core 210. This allows exhaust and cold material to be discharged from all sides of the molding cavity 300, and all exhaust is carried out in the radial direction of the molding cavity 300. This improves the exhaust and cold material discharge effect, eliminates cold material and cold lines around and on the surface of the metal die-casting 2, and thus improves product quality.

[0039] Continue to combine Figure 5-7 As shown, in one embodiment of the present invention, the lower mold core 210 and the lower mold core 211 are both roughly rectangular structures. Four sets of exhaust modules 212 are arranged around the lower mold core 211, corresponding to the four sides of the lower mold core 211. Furthermore, the ends of each exhaust strip 2121 of each exhaust module 212 are respectively connected to a side of the lower mold core 211 and the corresponding edge of the lower mold core 210. Within each exhaust module 212, each exhaust strip 2121 can be arranged in a long strip shape or a curved shape, without specific limitation herein.

[0040] Continue to combine Figure 5-7 As shown, in one embodiment of the present invention, the lower mold core 211 includes a first molding surface 2111 and a raised portion 2112 protruding from the first molding surface 2111. The raised portion 2112 defines a groove 2113. The reinforcing rib groove 2114 is recessed at least in the raised portion 2112 and communicates with the groove 2113. Specifically, the reinforcing rib groove 2114 is recessed downward perpendicular to the raised portion 2112, and the length of the reinforcing rib groove 2114 extends toward the edge of the lower mold core 210. The gate 112 provided on the upper mold core 111 is disposed corresponding to the groove 2113, thereby arranging the reinforcing rib grooves 2114 radially around the gate 112.

[0041] See Figure 7 As shown, in a specific embodiment, the raised portion 2112 includes a first side wall 2112a, a second side wall 2112b disposed within the first side wall 2112a, and a top wall 2112c connected between the first side wall 2112a and the second side wall 2112b, wherein the top wall 2112c has a relatively small width. The interior of the second side wall 2112b defines the groove 2113, and the reinforcing rib groove 2114 is formed perpendicular to the top wall 2112c and recessed downward.

[0042] Combine Figure 5-7As shown, in this specific embodiment, there are four first side walls 2112a and four second side walls 2112b. Among them, the four first side walls 2112a are connected in sequence, and the lengths of the four first side walls 2112a can be the same or different. In this embodiment, the lengths of the four first side walls 2112a are not exactly the same, so that the protrusion 2112 is roughly rectangular. And the four first side walls 2112a are inclined and protruded upward compared to the first molding surface 2111. Specifically, the four first side walls 2112a tend to converge upward, and the inclination angle between each first side wall 2112a and the first molding surface 2111 can be the same or different, and the connection position between each first side wall 2112a and the first molding surface 2111 is preferably an arc-shaped transition, as shown in FIG. Figure 7 The second side wall 2112b is a vertical plane structure, and the four second side walls 2112b are connected in sequence to form the rectangular groove 2113. The four second side walls 2112b correspond to the four first side walls 2112a, and each second side wall 2112b is connected to the corresponding first side wall 2112a through a top wall 2112c, as shown. Figure 7 shown.

[0043] Continue to combine Figure 5-7 As shown, each first side wall 2112a is provided with a plurality of spaced-apart reinforcing rib grooves 2114. Specifically, the reinforcing rib grooves 2114 are formed perpendicular to the top wall 2112c and are recessed downward, and the reinforcing rib grooves 2114 pass through the corresponding second side wall 2112b. The reinforcing rib grooves 2114 provided on the four first side walls 2112a are radially arranged around the protrusion 2112, that is, the reinforcing rib grooves 2114 provided on each first side wall 2112a extend from the first side wall 2112a to the side of the corresponding lower mold core 211, as shown in FIG. Figure 5-6 The reinforcing rib grooves 2114 provided on the four first side walls 2112a are used to form reinforcing ribs on the product, as will be described later.

[0044] Combine Figure 5-6 As shown, in a specific embodiment of the present invention, some of the reinforcing rib grooves 2114 are only provided on the raised portion 2112, while some of the reinforcing rib grooves 2114 extend from the raised portion 2112 to the first molding surface 2111. The length of each reinforcing rib groove 2114 extending to the first molding surface 2111 is not specifically limited. In other words, the length of the projection of each reinforcing rib groove 2114 on the lower mold core 211 is not specifically limited and can be flexibly set according to specific product requirements.

[0045] Continue to combine Figure 2-4 、 Figure 8As shown, in the present invention, the upper mold core 111 includes a second molding surface 1111, a recessed portion 1112 recessed in the second molding surface 1111, and a protrusion 1113 protruding from the recessed portion 1112. The second molding surface 1111 cooperates with the first molding surface 2111 of the lower mold core 211, the recessed portion 1112 cooperates with the raised portion 2112 of the lower mold core 211, and the protrusion 1113 cooperates with the groove 2113 of the lower mold core 211. Specifically, when the upper mold core 111 is pressed onto the lower mold core 211, the second molding surface 1111 is pressed onto the first molding surface 2111, the recessed portion 1112 is engaged with the raised portion 2112, and at the same time, the protrusion 1113 is accommodated in the groove 2113, so that the molding cavity 300 is formed between the upper mold core 111 and the lower mold core 211, as shown in FIG. Figure 8 shown.

[0046] The following combination Figures 1-13 As shown, the metal die casting mold 1 of the present invention is mainly used to shape magnesium alloy raw materials into a housing 2 for a vehicle-mounted rotating screen. Of course, it can also be used to shape metal die castings of other raw materials.

[0047] Combine Figure 1 、 Figure 8 As shown, when the molding die 1 is working, the upper mold 100 is pressed against the lower mold 200, so that the upper mold core 110 is pressed against the lower mold core 210, and the upper mold core 110 and the lower mold core 210 cooperate to form the molding cavity 300. Figure 8 As shown. At this time, the second molding surface 1111 of the upper mold core 110 is pressed onto the first molding surface 2111 of the lower mold core 210, and the recessed portion 1112 of the upper mold core 110 is engaged with the raised portion 2112 of the lower mold core 210. At the same time, the protrusion 1113 of the upper mold core 110 is accommodated in the groove 2113 of the lower mold core 210. The gate 112 on the upper mold core 111 is connected to the molding cavity 300, and the gate 112 corresponds to the groove 2113 of the lower mold core 210. The design of the molding cavity 300 thickens the main wall thickness of the position where the reinforcing rib 202 is provided on the shell 2, thereby making the ratio between the main wall thickness of the shell 2 and the thickness of the root of the reinforcing rib 202 more reasonable, as will be described later.

[0048] The semi-solid raw material of magnesium alloy is injected through the injection port on the upper mold base 120. Since the diameter of the gate 112 set on the upper mold core 110 is increased, a large nozzle feeding method is formed, thereby increasing the filling speed of the position where the reinforcing rib groove 2114 is provided on the lower mold core 211, and improving the filling and pressure transmission shrinkage compensation, that is, increasing the filling speed of the position where the reinforcing rib 202 is provided on the shell 2, and improving the filling and pressure transmission shrinkage compensation, thereby effectively solving the surface shrinkage problem of the shell 2 and making the appearance of the shell 2 have no shrinkage mark.

[0049] The following combination Figures 9-13 As shown, it is a shell 2 formed by using the metal die casting mold 1 of the present invention. The shell 2 specifically includes a main body 201 and a plurality of reinforcing ribs 202. The main body 201 has a first wall thickness H, such as Figure 13 Each reinforcing rib 202 is protruded from the back of the main body 201. Each reinforcing rib 202 includes a root portion 202a connected to the main body 201 and an end portion away from the main body 201. The root portion 202a has a second wall thickness h. Figure 13 As shown. Furthermore, the second wall thickness h is less than the first wall thickness H. Therefore, without changing the structure of the reinforcing rib 202, by changing the ratio between the thickness of the root portion 202a of the reinforcing rib 202 and the main wall thickness of the shell 2, the mechanical properties of the reinforcing rib 202 are ensured to meet the requirements, and the surface shrinkage problem of the shell 2 is effectively solved, so that the appearance of the shell 2 does not shrink.

[0050] See Figure 12-14 As shown, in one specific embodiment, the first wall thickness H of the main body 201 is designed to be 2.1 mm, and the second wall thickness h of the rib 202 at the root where it connects to the main body 201 is designed to be 1.68 mm, which conforms to the common rib wall thickness design concept for die-cast parts. The housing 2 molded according to this embodiment has no shrinkage marks on the front of the main body 201, as shown in Figure 14. That is, the surface of the housing 2 is free of shrinkage marks and has no shrinkage lines, giving it an appearance without shrinkage marks.

[0051] See Figure 15-16 As shown, in comparison, in an existing molding method, the first wall thickness H' of the shell 2' is designed to be 1.6 mm, and the second wall thickness h' of the root 202a' of the reinforcing rib 202' is designed to be 2.52 mm. The thickness of the root 202a' of the reinforcing rib 202' is greater than the main wall thickness of the shell 2'. The structural design is unreasonable, and the main wall thickness is thin. Therefore, the cooling and solidification are fast during molding, and the filling of the thick wall position of the reinforcing rib 202' and the pressure transmission and shrinkage compensation are insufficient, resulting in the back of the reinforcing rib 202' being prone to shrinkage, thereby making the shrinkage lines on the front of the shell 2' obvious, and the product shrinkage mark is concave, which cannot meet the customer's assembly and visual appearance requirements.

[0052] In summary, the metal die-casting forming mold 1 of the present invention expands the outer diameter of the gate 112, thereby forming a large-mouth feeding method. When forming the metal die-casting 2, the main wall thickness of the position where the reinforcing rib 202 is set on the metal die-casting 2 is thickened, and the filling of the thick wall position of the metal die-casting 2 and the pressure transmission and shrinkage compensation are improved, thereby increasing the filling speed, thereby effectively solving the shrinkage problem of the surface of the metal die-casting 2, and making the surface appearance of the metal die-casting 2 without shrinkage marks; at the same time, multiple groups of exhaust modules 212 are arranged around the lower mold core 211, and each group of exhaust modules 212 are connected to the molding cavity 300 and extend from the lower mold core 211 to the edge of the lower mold core 210, thereby improving the exhaust and cold material discharge effect under the large-mouth feeding method, so that there is no cold material or cold lines around and on the surface of the metal die-casting 2. Therefore, the die-cast metal die-casting 2 has a higher quality, which not only solves the problem of poor appearance of the spray paint, but also meets the customer's assembly and visual appearance requirements.

[0053] The structures and principles of other parts of the metal die-casting mold 1 involved in the present invention are conventional methods well known to those skilled in the art and will not be described in detail here.

[0054] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A metal die casting mold, comprising a matching upper mold and a lower mold, characterized in that: The lower mold includes a lower mold base and a lower mold core embedded in the lower mold base. The lower mold core includes a lower mold core and multiple sets of exhaust modules arranged around the lower mold core. The lower mold core is concavely provided with multiple reinforcing rib grooves, and each set of the exhaust modules extends from the lower mold core to the edge of the lower mold core. The upper mold includes an upper mold base and an upper mold core embedded in the upper mold base, and the upper mold core includes an upper mold core and a gate penetrating the upper mold core; The upper mold core cooperates with the lower mold core to form a molding cavity, and the molding cavity is communicated with each group of the exhaust modules.

2. The metal die casting mold according to claim 1, wherein: The lower mold core includes a first molding surface and a raised portion protruding from the first molding surface, the raised portion is surrounded by a groove, and the reinforcing rib groove is at least recessed in the raised portion and connected to the groove.

3. The metal die casting mold according to claim 2, wherein: Part of the reinforcing rib groove extends from the raised portion to the first forming surface.

4. The metal die casting mold according to claim 2, wherein: The reinforcing rib grooves are radially arranged around the raised portion.

5. The metal die casting mold according to claim 2, wherein: The raised portion includes a first side wall, a second side wall arranged inside the first side wall, and a top wall connected between the first side wall and the second side wall. The interior of the second side wall forms the groove, and the reinforcing rib groove is formed by being recessed downward perpendicular to the top wall.

6. The metal die casting mold according to claim 5, wherein: The first side wall is arranged obliquely, and the connection position between the first side wall and the first forming surface is an arc-shaped transition.

7. The metal die casting mold according to claim 5, wherein: The second side wall is arranged vertically.

8. The metal die casting mold according to claim 2, wherein: The upper mold core includes a second molding surface and a recessed portion concavely arranged on the second molding surface, a convex block is provided in the recessed portion, the second molding surface cooperates with the first molding surface, the recessed portion cooperates with the convex portion, and the convex block cooperates with the groove.

9. The metal die casting mold according to any one of claims 2 to 8, wherein: The gate is arranged corresponding to the groove, and the reinforcing rib groove extends from the protruding portion to the edge of the lower mold core.

10. The metal die casting mold according to any one of claims 1 to 8, characterized in that: Each group of the exhaust modules includes a plurality of exhaust strips arranged at intervals, and each of the exhaust strips is connected to the molding cavity and extends from the edge of the lower mold core to the edge of the lower mold core.

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