阅读说明：本技术 压铸模具、终端结构件的压铸成型方法及终端 (Die-casting die, die-casting forming method of terminal structural part and terminal ) 是由 万伟舰 周启琛 李琦 于 2021-06-30 设计创作，主要内容包括：本申请属于终端结构件制造技术领域,尤其涉及一种压铸模具、终端结构件的压铸成型方法及终端。压铸模具包括模具主体和阻流件,模具主体具有型腔,所述阻流件形成于所述型腔的内壁上,并用于迟滞金属熔液在型腔内对应于结构件的厚壁位置处的流动。阻流件的存在便能够在结构件压铸成型后,对结构件的厚壁处的组织状态起到改良作用,使得结构件的厚壁处的内部组织的结构强度更强,能够避免或较佳地降低内部组织出现冷料缺陷的几率。同时,阻流件的存在也能够避免或较佳地降低结构件厚壁处的表层组织的缩孔、气孔、冷料以及沙眼等缺陷产生的几率,较佳地提高了结构件的成型塑性和强度。(The application belongs to the technical field of terminal structural part manufacturing, and particularly relates to a die-casting die, a die-casting forming method of a terminal structural part and a terminal. The die-casting die comprises a die main body and a flow resisting piece, wherein the die main body is provided with a die cavity, and the flow resisting piece is formed on the inner wall of the die cavity and is used for delaying the flow of molten metal in the die cavity at the position corresponding to the thick wall of a structural part. Due to the existence of the flow resisting part, the structural state of the thick wall of the structural component can be improved after the structural component is subjected to die-casting forming, so that the structural strength of the internal structure of the thick wall of the structural component is higher, and the probability of cold material defect of the internal structure can be avoided or preferably reduced. Meanwhile, due to the existence of the flow resisting part, the probability of generating defects such as shrinkage cavities, air holes, cold materials, sand holes and the like of surface tissues at the thick wall of the structural part can be avoided or preferably reduced, and the molding plasticity and the strength of the structural part are preferably improved.)

1. The utility model provides a die casting die, is applied to the die-casting shaping of structure (20), its characterized in that: the die-casting die (10) comprises a die main body (11) and a flow blocking piece (12), wherein the die main body (11) is provided with a die cavity (111), and the flow blocking piece (12) is formed on the inner wall of the die cavity (111) and is used for delaying the flow of molten metal at a thick-wall position corresponding to the structural piece (20) in the die cavity (111).

2. The die casting mold of claim 1, wherein: the choked flow piece (12) is arranged on the inner wall of the cavity (111) corresponding to the thick wall position of the structural part (20), and the choked flow piece (12) is close to the position of the inner wall of the cavity (111) corresponding to the thin wall of the structural part (20).

3. The die casting mold of claim 1, wherein: the cross section of the flow resisting part (12) along the wall thickness direction of the structural part (20) is rectangular;

or the cross section of the flow resisting part (12) along the wall thickness direction of the structural part (20) is trapezoidal;

or the cross section of the flow resisting part (12) along the wall thickness direction of the structural part (20) is triangular;

alternatively, the contour of the cross section of the spoiler (12) in the wall thickness direction of the structural part (20) is at least partially curved.

4. The die casting mold of claim 1, wherein: a drainage notch (13) is formed in the flow resisting part (12), the drainage notch (13) is used for draining molten metal to a region of the cavity (111) corresponding to the thin wall of the structural part (20), and the drainage notch (13) is formed towards the position of the cavity (111) corresponding to the thin wall of the structural part (20);

or, the choke piece (12) is provided with a guide surface (14), the guide surface (14) is used for guiding molten metal to a region of the cavity (111) corresponding to the thin wall of the structural component (20), and the guide surface (14) is opened towards the position of the cavity (111) corresponding to the thin wall of the structural component (20).

5. A die casting mould as claimed in any one of claims 1 to 4, wherein: the distance between the choke piece (12) and the position of the inner wall of the cavity (111) corresponding to the junction of the thin wall and the thick wall of the structural part (20) satisfies the following relation:

0.2mm≤D≤5mm；

wherein D represents the distance between the spoiler (12) and the inner wall of the cavity (111) at a position corresponding to the interface of the thin wall and the thick wall of the structural member (20).

6. A die casting mould as claimed in any one of claims 1 to 5, wherein: the ratio of the height of the spoiler (12) in the direction of the wall thickness of the structural part (20) to the wall thickness of the structural part (20) satisfies the following relationship:

0.1≤D1/D2≤10；

wherein D1 represents the height value of the spoiler (12) in the wall thickness direction of the structural part (20), and D2 represents the wall thickness value at the thick wall of the structural part (20).

7. A die-casting forming method of a terminal structural part is characterized by comprising the following steps: the method comprises the following steps:

providing the die-casting die (10) as claimed in any one of claims 1 to 6, wherein a flow resisting part (12) is formed on the inner wall of a cavity (111) of the die-casting die (10);

placing the die-casting die (10) in a die-casting machine, and preheating the die-casting die (10) so that the die-casting die (10) reaches a preset die-casting temperature;

after the die-casting die (10) reaches the die-casting temperature, the die-casting die (10) is closed, molten metal is injected into the cavity (111), and the flow blocking piece (12) is used for delaying the flow of the molten metal at a position, corresponding to the thick wall of the structural part (20), in the cavity (111).

8. A terminal comprising a structural member (20), characterized in that: the structural member (20) is manufactured by the die-casting method of the terminal structural member (20) according to claim 7.

9. The terminal of claim 8, wherein: the structural part (20) is a shell, the shell is provided with a frame (21) and a panel (22) arranged in the frame (21), the thickness direction of the panel (22) is followed, the thickness of the frame (21) is larger than that of the panel (22), and a follow-up groove (23) formed by filling the die-casting forming space of the frame (21) with the flow resisting part (12) is formed at the position, close to the panel (22), of the frame (21).

10. The terminal of claim 9, wherein: the follower groove (23) is arranged close to the panel (22).

11. The terminal of claim 9, wherein: the following grooves (23) are arranged along the length direction of the frame (21).

12. A terminal according to any of claims 9 to 11, wherein: the ratio of the groove depth value of the following-shaped groove (23) to the wall thickness value of the frame (21) satisfies the following relation:

0.1≤D3/D4≤10；

wherein D3 represents the groove depth value of the following-shaped groove (23), and D4 represents the wall thickness value of the frame (21).

13. A terminal according to any of claims 9 to 11, wherein: the distance between the boundary of the panel (22) and the frame (21) and the groove wall of the following-shaped groove (23) on the side facing the boundary satisfies the following relation:

0.2mm≤D5≤5mm；

wherein D5 represents the distance between the boundary of the panel (22) and the frame (21) and the groove wall of the following groove (23) on the side facing the boundary.

14. A terminal according to any of claims 9 to 13, wherein: the ratio of the thickness value of the panel (22) to the thickness value of the rim (21) in the thickness direction of the panel (22) satisfies the following relationship:

0.05≤D6/D4≤2；

wherein D6 represents a thickness value of the panel (22).

Technical Field

The application belongs to the technical field of terminal structural part manufacturing, and particularly relates to a die-casting die, a die-casting forming method of a terminal structural part and a terminal.

Background

With the development of technology, mobile terminals such as mobile phones are also developing in a direction of light weight and thin profile. Due to the light and thin design, the metal structural members such as the housing in the mobile terminal often have large thickness differences at different positions.

In the prior art, metal structural members such as a housing in a mobile terminal are usually formed by a die-casting process, and in the process of die-casting, because the flow rate of molten metal is extremely fast, the structural members have a large thickness difference, the molten metal can be quickly filled in the relatively thin positions of the corresponding structural members in a die, and is difficult to be fully filled in the relatively thick positions of the corresponding structural members in the die in a short time, so that the relatively thick positions of the structural members have the defects of shrinkage cavities, air holes, cold materials, sand holes and the like.

Disclosure of Invention

An object of the embodiments of the present application is to provide a die-casting mold, a die-casting molding method for a terminal structural member, and a terminal, which can fully fill molten metal in a relatively thick position of a corresponding structural member in the die-casting mold, and preferably reduce the probability of occurrence of a structural defect in the relatively thick position of the structural member.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

in a first aspect: the die-casting die comprises a die main body and a flow resisting piece, wherein the die main body is provided with a die cavity, and the flow resisting piece is formed on the inner wall of the die cavity and used for delaying the flowing of molten metal in the die cavity corresponding to the thick-wall position of the structural piece.

So, through making die casting die include mould main part and choked flow piece, like this at the die-casting in-process, along with molten metal pours into the die cavity of mould main part into, molten metal just can receive the hindrance effect of choked flow piece, and the position that corresponds the thick wall of structure in the die cavity reduces the velocity of flow, so can make molten metal can fill the position that corresponds the thick wall of structure in the die cavity fully. Therefore, due to the existence of the flow resisting part, the structural state of the thick wall of the structural component can be improved after the structural component is subjected to die-casting forming, so that the structural strength of the internal structure of the thick wall of the structural component is stronger, and the probability of cold material defect of the internal structure can be avoided or better reduced. Meanwhile, due to the existence of the flow resisting part, the probability of generating defects such as shrinkage cavities, air holes, cold materials, sand holes and the like of surface tissues at the thick wall of the structural part can be avoided or preferably reduced, and the molding plasticity and the strength of the structural part are preferably improved.

Optionally, the choke is disposed on the inner wall of the cavity corresponding to the thick wall of the structural member, and the choke is close to the inner wall of the cavity corresponding to the thin wall of the structural member. Corresponding to the part of the structural member with larger thickness difference, the flow resisting piece can be arranged on the cavity wall corresponding to the part of the structural member with relatively thicker thickness and close to the position of the cavity wall corresponding to the part of the structural member with relatively thinner thickness.

Alternatively, the cross section of the spoiler in the direction of the wall thickness of the structural part may be rectangular, square or rectangular, etc.

Or the cross section of the flow resisting piece along the wall thickness direction of the structural part is in a trapezoid shape, and the cross section of the flow resisting piece can be in an isosceles trapezoid shape or a right-angle trapezoid shape.

Or the cross section of the flow resisting part along the wall thickness direction of the structural part is triangular, and the cross section of the flow resisting part can be an equilateral triangle, an isosceles triangle or a right-angled triangle.

Alternatively, the contour of the cross section of the flow resistance element in the wall thickness direction of the structural element is curved. The cross-section of the spoilers may be in a "domed" configuration or a semi-circular configuration, etc.

Optionally, the flow resisting part is provided with a drainage notch, the drainage notch is used for draining the molten metal to a thin-wall region of the structural part corresponding to the cavity, and the drainage notch is arranged towards the thin-wall position of the structural part corresponding to the cavity;

or the flow resisting part is provided with a guide surface, the guide surface is used for guiding the molten metal to the thin-wall area of the structural part corresponding to the cavity, and the guide surface is arranged at the position facing the thin wall of the structural part corresponding to the cavity.

Optionally, the distance between the choker and the position of the inner wall of the cavity at the intersection of the thin wall and the thick wall of the corresponding structural member satisfies the following relationship:

0.2mm≤D≤5mm；

wherein D represents the distance between the choked flow piece and the position of the junction of the thin wall and the thick wall of the corresponding structural part of the inner wall of the cavity.

Optionally, a ratio of a height value of the spoiler in a wall thickness direction of the structural part and a wall thickness value at a thick wall of the structural part satisfies the following relationship:

0.1≤D1/D2≤10；

wherein D1 represents the height value of the spoiler in the wall thickness direction of the structural part, and D2 represents the wall thickness value at the thick wall of the structural part.

In a second aspect: the die-casting forming method of the terminal structural part comprises the following steps:

providing the die-casting die, wherein a flow resisting part is formed on the inner wall of a cavity of the die-casting die;

placing the die-casting die in a die-casting machine, and preheating the die-casting die so as to enable the die-casting die to reach a preset die-casting temperature;

after the die-casting die reaches the die-casting temperature, the die-casting die is closed, molten metal is injected into the cavity, and the flow blocking piece is used for delaying the flow of the molten metal in the cavity corresponding to the thick-wall position of the structural piece.

According to the terminal structural part die-casting forming method provided by the embodiment of the application, when the die-casting forming method is implemented, the flow blocking piece of the die-casting module can form the flow blocking effect on the molten metal at the wall thickness of the structural part when the molten metal is filled in the cavity of the die-casting die, so that the molten metal can be fully filled in the cavity at the position corresponding to the thick wall of the structural part. Therefore, due to the existence of the flow resisting part, the structural state of the thick wall of the structural component can be improved after the structural component is subjected to die-casting forming, so that the structural strength of the internal structure of the thick wall of the structural component is stronger, and the probability of cold material defect of the internal structure can be avoided or better reduced. Meanwhile, due to the existence of the flow resisting piece, the probability of generating defects such as shrinkage cavities, air holes, sand holes and the like of surface tissues at the thick wall of the structural member can be avoided or preferably reduced, and the molding plasticity and the strength of the structural member are preferably improved.

In a third aspect: the terminal comprises a structural part, and the structural part is manufactured by the die-casting forming method of the terminal structural part.

Optionally, the structural member is a housing, the housing has a frame and a panel disposed in the frame, the thickness of the frame is greater than that of the panel along the thickness direction of the panel, and a follow-up groove formed by filling a flow resisting element in a die-casting forming space of the frame is formed at a position of the frame close to the panel.

Optionally, the conformal slot is disposed proximate to the faceplate.

Optionally, the conformal grooves are arranged along the length direction of the frame.

Optionally, the ratio of the groove depth value of the random groove to the wall thickness value of the frame satisfies the following relationship:

0.1≤D3/D4≤10；

where D3 represents the groove depth value of the associated groove, and D4 represents the wall thickness value of the frame.

Optionally, the distance between the boundary of the panel and the frame and the groove wall of the conformal groove on the side facing the boundary satisfies the following relationship:

0.2mm≤D5≤5mm；

wherein D5 represents the distance between the boundary of the panel and the frame and the groove wall of the shape-following groove on the side facing the boundary.

Optionally, in the thickness direction of the panel, the thickness value of the panel and the thickness value of the bezel satisfy the following relationship:

0.05≤D6/D4≤2；

where D6 represents the thickness value of the panel.

According to the terminal provided by the embodiment of the application, because the structural part in the terminal is manufactured by the terminal structural part die-casting forming method, when the method is implemented, the existence of the flow resisting part in the die-casting die can improve the structure performance of the wall thickness of the structural part, the probability of the defects of shrinkage cavities, air holes, cold materials, sand holes and the like of the die-cast formed structural part is avoided or better reduced, the strength of the structural part is improved, and the overall strength and the use reliability of the terminal with the structural part are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a die casting mold provided in an embodiment of the present application;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cut-away view of a die casting mold and structural member provided by an embodiment of the present application;

FIG. 4 is another cut-away view of a die casting mold provided in accordance with an embodiment of the present application;

FIG. 5 is an enlarged partial view taken at B in FIG. 4;

FIG. 6 is a first schematic view of a portion of a first spoiler and a first mold body according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram ii of a portion of a flow resisting element and a mold main body according to an embodiment of the present application;

fig. 8 is a schematic structural view three of a portion of a flow resisting element and a mold body provided in an embodiment of the present application;

fig. 9 is a fourth schematic partial structural view of a spoiler and a mold body according to an embodiment of the present application;

fig. 10 is a partial schematic structural view five of a spoiler and a mold body according to an embodiment of the present application;

fig. 11 is a schematic partial structural view six of a spoiler and a mold body according to an embodiment of the present application;

fig. 12 is a schematic partial structural view seven of a spoiler and a mold body according to an embodiment of the present application;

fig. 13 is a schematic partial structural view eight of a spoiler and a mold main body according to an embodiment of the present application;

fig. 14 is a flowchart illustrating steps of a method for die-casting a terminal structural member according to an embodiment of the present disclosure;

fig. 15 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a structural member of a terminal according to an embodiment of the present disclosure;

FIG. 17 is a cross-sectional view taken along line C-C of FIG. 16;

FIG. 18 is an enlarged partial view at E of FIG. 17;

fig. 19 is another structural view of a structural member of a terminal according to an embodiment of the present disclosure;

fig. 20 is a partial enlarged view at F in fig. 19.

Wherein, in the figures, the respective reference numerals:

10-die casting die 11-die main body 12-flow resisting part

13-drainage notch 14-guide surface 15-moving die

16-fixed die 20-structural member 21-frame

22-panel 23-follower groove 30-terminal

111-cavity.

Detailed Description

Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1 to 20 are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

For the reader's understanding, the following explains the occurrence of terms in the present application:

die casting: the method is a precision casting method in which molten metal is forced into a mold under high pressure.

Fixing a mold: the die casting die is fixedly arranged on a die of a fixed die plate of the die casting machine.

Moving the mold: the die is fixedly arranged on a movable die plate of the die casting machine in the die casting die, and the movable die and the fixed die are matched with each other along with the movement of the movable die plate so as to form the complete die casting die.

Terminal devices such as mobile phones, tablet computers, and notebook computers generally have a structural member (such as an aluminum alloy frame of a mobile phone) formed by a die-casting process. With the light and thin design of the terminal equipment, the structural member is also correspondingly light and thin, so that different positions of the structural member have larger thickness differences, and in the die-casting process, molten metal is difficult to be fully filled in the position, corresponding to the relatively thicker position of the structural member, of the die in a short time, so that the relatively thicker position of the structural member has the defects of shrinkage cavity, air hole, cold material, sand hole and the like.

Based on the above problems, the embodiment of the application provides a die-casting mold 10, a die-casting method for a terminal structural member 20, and a terminal 30, which can enable molten metal to be fully filled in a position, corresponding to a relatively thick position of the structural member 20, in the die-casting mold 10, and preferably reduce the probability of occurrence of a structural defect at the relatively thick position of the structural member 20.

Specifically, as shown in fig. 15, in the present embodiment, the terminal 30 refers to a mobile terminal 30 device such as a mobile phone, a tablet computer, a notebook computer, and the like, and may also refer to a large terminal 30 device such as a communication base station and the like. In the present embodiment, the structural component 20 may refer to the structural component 20 as a component of the terminal 30, and may be an object such as a metal frame or a housing in a mobile phone, a tablet computer, a notebook computer, or a large screen display. The structural member 20 may be made of aluminum alloy or magnesium aluminum alloy by a die casting process.

Referring to fig. 1 to 3, in particular, in a first aspect, embodiments of the present application provide a die-casting mold 10, where the die-casting mold 10 is applied to die-casting a structural member 20. The die casting mold 10 includes a mold main body 11 and a choke 12. The die body 11 has a die cavity 111, wherein the die body 11 may include a fixed die 16 and a movable die 15, the fixed die 16 is mounted on a fixed die 16 plate of the die casting machine, the movable die 15 is mounted on a movable die 15 plate of the die casting machine, the fixed die 16 is closed with the movable die 15 plate of the die casting machine as the movable die 15 plate of the die casting machine moves closer to complete a closing action, and the fixed die 16 and the movable die 15 surround the die cavity 111 of the die body 11.

More specifically, the choke piece 12 is formed on an inner wall of the cavity 111 and serves to retard the flow of the molten metal within the cavity 111 at a position corresponding to a thick wall of the structural member 20. The choke piece 12 may be integrally formed with the mold body 11 (as shown in fig. 4), or may be provided as an insert on the mold body 11 (as shown in fig. 2).

In the present embodiment, the thick-walled position of the structural member 20 refers to a thick portion of the structural member 20. In the present embodiment, the portion of the structural member 20 having a large thickness is compared to the portion of the structural member 20 having a small thickness. (for example, the thicker portion of the structural member 20 refers to a portion with a thickness of 5mm to 7mm, and the thinner portion of the structural member 20 refers to a portion with a thickness of 0.35 mm to 0.5 mm.) therefore, the thin-thick concept of the structural member 20 described in this embodiment is only a relative concept, and does not refer to a certain thickness value range.

Referring to fig. 3, the die casting mold 10 provided in the embodiment of the present application is further described as follows: the die casting die 10 provided by the embodiment of the application comprises the die main body 11 and the spoiler 12, so that in the die casting process, along with the injection of molten metal into the cavity 111 of the die main body 11, the molten metal can be hindered by the spoiler 12, the flow rate of the molten metal is reduced at the position corresponding to the thick wall of the structural part 20 in the cavity 111, and the molten metal can be fully filled in the position corresponding to the thick wall of the structural part 20 in the cavity 111. Therefore, the existence of the choke 12 can improve the structural state of the thick wall of the structural member 20 after the structural member 20 is die-cast, so that the structural strength of the internal structure of the thick wall of the structural member 20 is stronger, and the probability of cold material defect of the internal structure can be avoided or preferably reduced. Meanwhile, the existence of the choker 12 can also avoid or preferably reduce the probability of the defects of shrinkage cavities, air holes, cold materials, sand holes and the like of the surface layer tissue at the thick wall of the structural member 20, preferably improve the molding plasticity and strength of the structural member 20, and particularly improve the molding plasticity, strength and yield of the ultrathin structural member 20 with the overall average thickness of about 0.3mm to 0.5 mm.

In other embodiments of the present application, as shown in fig. 3 and 5, the choke 12 is disposed on the inner wall of the cavity 111 corresponding to the thick wall of the structural member 20, and the choke 12 is close to the inner wall of the cavity 111 corresponding to the thin wall of the structural member 20. Specifically, in the present embodiment, corresponding to the portion of the structural member 20 with the larger thickness difference, the choke piece 12 may be disposed on the wall of the cavity 111 corresponding to the relatively thicker portion of the structural member 20, and close to the position of the wall of the cavity 111 corresponding to the relatively thinner portion of the structural member 20, so that in the die-casting process, since the choke piece 12 is close to the position of the wall of the cavity 111 corresponding to the relatively thinner portion of the structural member 20, the molten metal may be blocked by the choke piece 12 to slow down the flow rate, so that a portion of the molten metal may be fully retained in the space of the cavity 111 corresponding to the relatively thicker portion of the structural member 20, and further fully filled in the position of the cavity 111 corresponding to the thick wall of the structural member 20.

In other embodiments of the present application, as shown in fig. 3 and 5, the spoiler 12 has a rectangular cross-section in the direction of the wall thickness of the structural part 20. Specifically, by making the cross section of the choke 12 rectangular, on one hand, the contact area between the choke 12 and the molten metal can be increased, and thus a better flow blocking effect of the choke 12 on the molten metal can be achieved. On the other hand, by making the cross-section of the spoiler 12 rectangular, the manufacturing cost of the spoiler 12 can also be reduced.

For example, the cross-section of the spoiler 12 may be square, rectangular, etc. The thickness difference position in the structural member 20 may be a long step shape (for example, at the boundary between the panel 22 and the frame 21 of the housing), and at this time, the choke 12 may also be a cuboid strip shape corresponding to the long step shape and disposed on the inner wall of the cavity 111 of the mold main body 11.

In other embodiments of the present application, as shown in fig. 3, 6 and 7, the spoiler 12 has a trapezoidal cross-section in the direction of the wall thickness of the structural member 20. Specifically, by designing the cross-sectional configuration of the choke 12 to be trapezoidal, it is also possible to save manufacturing materials of the choke 12 and to achieve a weight reduction of the structure of the choke 12 while the choke 12 has a function of blocking the flow of molten metal.

Optionally, the cross-sectional configuration of the choke element 12 may be an isosceles trapezoid or a right-angled trapezoid, and whether the isosceles trapezoid or the right-angled trapezoid is an isosceles trapezoid or a right-angled trapezoid, a bevel edge of the trapezoid faces a space in the cavity 111 of the mold main body 11 corresponding to the thin-wall direction of the structural element 20, so that, from the perspective structure of the choke element 12, a surface of the choke element 12 having a bevel edge is an inclined surface, and the inclined surface can play a role in guiding the molten metal when the molten metal flows toward the space in the cavity 111 of the mold main body 11 corresponding to the thin-wall direction of the structural element 20. In this way, by designing the cross-sectional configuration of the choke 12 to be an isosceles trapezoid or a right-angled trapezoid, the choke 12 has a function of retarding the flow of the molten metal, and at the same time, the choke 12 has a function of guiding the molten metal to flow toward the space of the mold cavity 111 of the mold main body 11 corresponding to the thin-wall direction of the structural member 20.

Illustratively, when the die casting mold 10 is in a flat state as shown in fig. 2, the width dimension of the spoiler 12 in the width direction thereof ranges from 0.3mm to 10 mm. The height dimension of the choke 12 in the height direction of the die casting mold 10 ranges from 0.3mm to 10 mm.

In other embodiments of the present application, as shown in fig. 3, 8 and 9, the spoiler 12 has a triangular cross-section in the direction of the wall thickness of the structural member 20. Specifically, on the one hand, in order to further save the manufacturing material of the choke 12, the cross section of the choke 12 along the wall thickness direction of the structural component 20 may also be triangular, so that the choke 12 has better drainage performance for the molten metal flowing toward the space in the cavity 111 of the mold body 11 corresponding to the thin wall direction of the structural component 20.

The cross section of the flow resisting element 12 in the wall thickness direction of the structural element 20 may be an equilateral triangle, an isosceles triangle or a right-angled triangle, for example, and the hypotenuse of the triangle faces the space in the cavity 111 of the mold body 11 corresponding to the thin wall direction of the structural element 20 no matter what the cross section is in the triangular configuration.

In further exemplary embodiments of the present application, as shown in fig. 3, 10 and 11, the contour of the cross-section of the spoiler 12 in the direction of the wall thickness of the structural part 20 is at least partially curved. Specifically, by making the contour line of the cross section of the choke 12 at least partially curved, it also means that the outer wall of the choke 12 is at least partially curved, so that when the molten metal flows through the choke 12, the viscous resistance of the molten metal from the outer wall of the choke 12 can be reduced, thereby improving the smoothness of the molten metal flowing in the cavity 111.

Illustratively, based on that the cross-sectional contour line of the choke piece 12 is at least partially curved, the cross section of the choke piece 12 may be in an "arch type" configuration, and a dome of the "arch type" configuration is disposed opposite to the inner wall of the cavity 111, so that when molten metal is injected into the cavity 111, the molten metal can be fully filled in a space corresponding to the thick wall of the structural member 20 in the cavity 111 under the flow-limiting effect of the choke piece 12, and can be quickly filled in a space corresponding to the thin wall of the structural member 20 in the cavity 111 under the flow-guiding effect of the dome.

Alternatively, the cross-section of the spoiler 12 may be semi-circular or the like, based on the cross-sectional contour of the spoiler 12 being at least partially curved.

In other embodiments of the present application, as shown in fig. 3 and 12, the choke element 12 is formed with a flow guiding notch 13, the flow guiding notch 13 is used for guiding the molten metal to a space of the mold cavity 111 corresponding to the thin wall of the structural element 20, and the flow guiding notch 13 is opened toward a position of the mold cavity 111 corresponding to the thin wall of the structural element 20.

Specifically, the flow guiding notch 13 is formed in one side of the choke piece 12 facing the thin wall of the structural component 20 of the cavity 111, so that when the molten metal reaches the choke piece 12, a part of the molten metal can flow into the thin wall space of the cavity 111 corresponding to the structural component 20 through the flow guiding notch 13, so as to ensure that the molten metal is fully filled in the thin wall space of the cavity 111 corresponding to the structural component 20, and therefore, the thin wall part of the structural component 20 also has better structural strength.

In other embodiments of the present application, as shown in fig. 3 and 13, the choke 12 is formed with a guiding surface 14, the guiding surface 14 is used for guiding the molten metal to the thin-walled region of the cavity 111 corresponding to the structural component 20, and the guiding surface 14 is opened towards the cavity 111 corresponding to the thin-walled region of the structural component 20.

Specifically, besides the solution of forming the drainage notch 13 on the choke 12, the guiding surface 14 may be formed on one side of the choke 12 facing the thin wall of the structural component 20 corresponding to the cavity 111, so that the guiding surface 14 can achieve the guiding and drainage function in the process of flowing the molten metal to the thin wall space of the structural component 20 corresponding to the cavity 111 on one hand, and save the processing and manufacturing cost of the choke 12 on the other hand.

The guide surface 14 may be, for example, a curved surface or a flat surface.

In other embodiments of the present application, the distance between the spoiler 12 and the inner wall of the cavity 111 at the position corresponding to the intersection of the thin wall and the thick wall of the structural member 20 satisfies the following relationship:

0.2mm≤D≤5mm；

where D (shown in fig. 5) represents a distance between the spoiler 12 and the inner wall of the cavity 111 at a position corresponding to a boundary between the thin wall and the thick wall of the structural member 20.

Specifically, in the present embodiment, the distance between the choke piece 12 and the position of the inner wall of the cavity 111 corresponding to the junction between the thin wall and the thick wall of the structural member 20 is the distance between the outer wall of the choke piece 12 facing the junction and the junction, and by setting the distance D to be greater than or equal to 0.2mm, the choke piece 12 is prevented from being excessively close to the position of the inner wall of the cavity 111 corresponding to the thin wall of the structural member 20, so as to ensure that the molten metal can smoothly flow into the space of the cavity 111 corresponding to the thin wall of the structural member 20. Meanwhile, by setting the distance D to be less than or equal to 5mm, the choke piece 12 can be sufficiently close to the inner wall of the cavity 111 corresponding to the thin wall of the structural member 20, so that the molten metal can be sufficiently filled in the space of the inner wall of the cavity 111 corresponding to the thick wall of the structural member 20.

In other embodiments of the present application, the ratio of the height of the spoiler 12 in the direction of the wall thickness of the structural part 20 to the wall thickness of the structural part 20 satisfies the following relationship:

0.1≤D1/D2≤10；

where D1 represents the height of the spoiler 12 in the wall thickness direction of the structural part 20, and D2 represents the wall thickness of the structural part 20 at the thick wall. (see FIG. 4)

Specifically, by making the ratio of the height value D1 of the choke 12 in the wall thickness direction of the structural member 20 to the wall thickness value D2 of the structural member 20 greater than or equal to 0.1, the choke 12 can sufficiently and effectively choke the molten metal injected into the space in the cavity 111 corresponding to the thick wall of the structural member 20, so that the molten metal can be sufficiently filled in the space.

By making the ratio of the height D1 of the spoiler 12 in the wall thickness direction of the structural part 20 to the wall thickness D2 of the structural part 20 less than or equal to 10, it is possible to avoid the spoiler 12 from occupying the inner space of the cavity 111 too deeply, and thus to make the structural part 20 formed by die casting have sufficient structural strength in the thick wall.

Referring to fig. 14, in a second aspect, an embodiment of the present application further provides a die-casting method for a terminal structural member, including the following steps:

providing the die-casting die 10, wherein a flow resisting part 12 is formed on the inner wall of a cavity 111 of the die-casting die 10; as described above, the die casting mold 10 includes the fixed mold 16 and the movable mold, and the fixed mold 16 and the movable mold enclose the cavity 111. In the die casting process, the molten metal is poured into the cavity 111 to finally form the terminal structural member 20.

Placing the die-casting die 10 in a die-casting machine, and preheating the die-casting die 10 to enable the die-casting die 10 to reach a preset die-casting temperature; after the die casting mold 10 reaches the die casting temperature, the die casting mold 10 is closed, and molten metal is injected into the cavity 111, and the choke 12 is used for retarding the flow of the molten metal in the cavity 111 at a position corresponding to the thick wall of the structural member 20.

In the die-casting forming method for the terminal structural part provided by the embodiment of the application, when the molten metal is filled in the cavity 111 of the die-casting die 10, the spoiler 12 of the die-casting die set can form a spoiler effect on the molten metal at the wall thickness of the structural part 20, so that the molten metal can be fully filled in the cavity 111 corresponding to the thick wall of the structural part 20. Therefore, the existence of the choke 12 can improve the structural state of the thick wall of the structural member 20 after the structural member 20 is die-cast, so that the structural strength of the internal structure of the thick wall of the structural member 20 is stronger, and the probability of cold material defect of the internal structure can be avoided or preferably reduced. Meanwhile, the existence of the choke 12 can also avoid or preferably reduce the occurrence of defects such as shrinkage cavities, pores, sand holes and the like of the surface layer tissue at the thick wall of the structural member 20, and preferably improve the strength of the structural member 20.

Referring to fig. 15 and 16, in a third aspect, the present embodiment further provides a terminal 30, which includes a structural member 20, and the structural member 20 is manufactured by the above-mentioned die-casting method for the terminal 30 and the structural member 20. Specifically, in the present embodiment, the terminal 30 may refer to a mobile terminal 30 device such as a mobile phone, a tablet computer, and a notebook computer, or may refer to a large terminal 30 device such as a base station, a desktop computer, and the like. The structure 20 may be a metal housing or frame in the terminal 30.

In other embodiments of the present application, as shown in fig. 16, the structural member 20 is a housing, the housing has a frame 21 and a panel 22 disposed in the frame 21, a thickness of the frame 21 is greater than a thickness of the panel 22 along a thickness direction of the panel 22, and a conformal slot 23 formed by filling the die-cast space of the frame 21 with the spoiler 12 is formed at a position of the frame 21 close to the panel 22.

Specifically, in the present embodiment, the structural component 20 is a housing in the terminal 30 device, the housing is made of an aluminum alloy material, and may be an outer shell of the terminal 30 or a housing inside the terminal 30, and the structural component 20 has a portion with a thickness difference, which is, in the present embodiment, a connection portion between the frame 21 and the panel 22 of the housing. The position of the choke 12 is at the position of the cavity 111 corresponding to the joint of the frame 21 and the panel 22, and after the housing is die-cast, the joint of the frame 21 and the panel 22 is correspondingly formed with a follower groove 23 due to the existence of the choke 12 during the die-casting process, and the configuration of the space in the groove of the follower groove 23 is consistent with the external configuration of the choke 12.

In other embodiments of the present application, the slot 23 is disposed adjacent to the panel 22, as shown in fig. 17 and 18. In particular, based on the above feature that the spoiler 12 is disposed close to the thin wall of the corresponding structural member 20 in the cavity 111, the conformal slot 23 is correspondingly formed at the position of the housing frame 21 close to the panel 22 in the present embodiment.

In other embodiments of the present application, as shown in FIG. 18, the conformal slots 23 are arranged along the length of the rim 21. Specifically, since the joint between the frame 21 and the panel 22 generally extends in a straight shape, correspondingly, the spoiler 12 may also be disposed in a strip shape along the joint between the frame 21 and the panel 22, and the following grooves 23 formed after die casting may also be arranged along the length direction of the frame 21.

In other embodiments of the present application, the following relationship is satisfied depending on the ratio of the groove depth value of the groove 23 and the wall thickness value of the bezel 21:

0.1≤D3/D4≤10；

where D3 represents the groove depth value of the tracking groove 23, and D4 represents the wall thickness value of the frame 21. (see FIG. 17)

Specifically, based on the relationship between the height value of the spoiler 12 in the wall thickness direction of the structural member 20 and the wall thickness value at the thick wall of the structural member 20 described above: 0.1 is not less than D1/D2 is not less than 10, in the embodiment, the groove depth value of the conformal groove 23 formed after die casting and the wall thickness value of the frame 21 also satisfy the proportional relation, so that the frame 21 after die casting has enough integral strength.

In other embodiments of the present application, as shown in fig. 18, the distance between the interface between the panel 22 and the bezel 21 and the wall of the channel on the side of the conformal channel 23 facing the interface satisfies the following relationship:

0.2mm≤D5≤5mm；

where D5 represents the distance between the boundary between the panel 22 and the frame 21 and the groove wall of the conformal groove 23 on the side facing the boundary.

Specifically, based on the distance relationship between the spoiler 12 and the position of the inner wall of the cavity 111 corresponding to the junction between the thin wall and the thick wall of the structural member 20, the distance between the groove wall of the shape-following groove 23 formed after die casting and the junction on the side facing the junction is also equal to or greater than 0.2mm and equal to or less than D5 and equal to or less than 5 mm.

In other embodiments of the present application, as shown in fig. 18, the thickness value of the panel 22 and the thickness value of the bezel 21 in the thickness direction of the panel 22 satisfy the following relationship:

0.05≤D6/D4≤2；

where D6 represents the thickness value of the panel 22 and D4 represents the thickness value of the bezel 21.

Specifically, in the present embodiment, when the structural member 20 of the terminal 30 is a housing, the ratio of the thickness of the panel 22 to the thickness of the frame 21 is greater than or equal to 0.05 and less than or equal to 2, so as to ensure the light and thin design of the housing as a whole.

Illustratively, the panel 22 of the housing may have a thickness of 0.35 to 0.5mm, and the frame thickness may be 5 to 7 mm.

Illustratively, taking the terminal 30 as a mobile phone, as shown in fig. 19 and 20, the housing may be an inner housing of the mobile phone, and the conformal slot 23 may be formed continuously or intermittently at the rim 21 of the housing.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.