Flow channel structure and aluminum alloy mobile phone middle plate mold

Abstract

The utility model discloses a runner structure and aluminum alloy mobile phone middle plate mould, including first runner and a plurality of second runner, and first runner and a plurality of second runner intercommunication, wherein, the volume between the end of first runner to the end of any second runner is same. The runner structure and aluminum alloy mobile phone middle plate mould, because the volume between each branch runner from first runner end to second runner end is equal, even if path structure is different, the effective flow volume experienced by liquid is consistent, in the die casting process, the liquid of different branch will almost advance to the corresponding position at the same time, avoid the common problem such as center first, edge lag, help to realize multi-point synchronous injection or wide surface simultaneous filling, improve the consistency of thin-walled part, symmetry or multi-cavity mould, after dividing first runner and second runner, reduce the flow length, avoid the runner residual material in traditional runner gate, runner residual material is larger and longer, easy to cause warping deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum alloy die-casting molds, and in particular to a flow channel structure and an aluminum alloy mobile phone middle plate mold. Background Technology

[0002] Currently, in aluminum alloy die casting technology, mobile phone mid-plates, as typical thin-walled, high-precision structural parts, have high requirements for filling uniformity, filling speed, and gas venting efficiency during the die casting process. Traditional molds generally use a single large-sized fan-shaped gate or a symmetrically arranged small number of inlets for injecting and filling the die casting liquid.

[0003] Because the temperature gradient at the leading edge of the die-casting liquid is large during the filling process, it is very easy to generate defects such as cold shuts and short shots in the mold cavity, resulting in incomplete product structure or microcracks. When the runner structure is not designed properly, especially when the runner is too long or the pressure drop at the end is significant, shrinkage cavities or flow marks are very likely to occur, affecting the overall strength and appearance quality. In multi-cavity mold structures, if the flow path is not evenly arranged, the filling state of the die-casting liquid will be inconsistent between different cavities, resulting in large differences in product performance and insufficient batch stability. Utility Model Content

[0004] In view of the problems existing in the above-mentioned flow channel structure and aluminum alloy mobile phone middle plate mold, this utility model is proposed.

[0005] Therefore, one of the objectives of this utility model is to provide a flow channel structure that avoids defects such as cold shuts and short shots caused by a large temperature gradient at the leading edge, and the occurrence of shrinkage cavities or flow marks when the flow channel is too long or the pressure drop at the end is significant, thus leading to a decline in product quality.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: including,

[0007] The first flow channel and several second flow channels; and,

[0008] The first flow channel is connected to several second flow channels;

[0009] The volume between the end of the first flow channel and the end of any second flow channel is the same.

[0010] As a preferred embodiment of the flow channel structure of this utility model, an adjustment section is provided at the other end of the second flow channel. One end of the adjustment section is connected to the second flow channel, and the other end is connected to an adjacent adjustment section. The volume of the adjustment section gradually decreases along the direction away from the first flow channel.

[0011] As a preferred embodiment of the flow channel structure of this utility model, the adjusting section is a stepped contraction section structure, which includes a first contraction section, a holding section and a second contraction section. The height of the first contraction section and the second contraction section gradually decreases along the liquid flow direction, the height of the holding section remains consistent, and one end of the second contraction section is connected to the second flow channel.

[0012] As a preferred embodiment of the flow channel structure of this utility model, the adjusting section is a receiving cavity, the volume of the receiving cavity gradually decreases along the direction away from the first flow channel, and the receiving cavity expands outward along the flow direction of the die casting liquid to form a convex shape.

[0013] In a preferred embodiment of the flow channel structure described in this utility model, an ingate is connected to one end of the second flow channel along the liquid flow direction. The cross-sectional height of the ingate is smaller than the cross-sectional height of the second flow channel, and the cross-sectional width of the ingate is larger than the cross-sectional width of the second flow channel.

[0014] The second flow channel is formed by a second flow channel groove;

[0015] The adjustment section is formed at the connection point of the first flow channel and the second flow channel.

[0016] The beneficial effects of this utility model are as follows: Since the volume between the end of the first flow channel and the end of the second flow channel is equal in each branch channel, even if the path structure is different, the effective flow volume experienced by the liquid is consistent. During the die casting process, the liquid in different branches will be pushed to the corresponding position almost simultaneously, avoiding common problems such as center first and edge lag. It helps to achieve multi-point synchronous injection and wide-area simultaneous filling, improves the consistency of thin-walled parts, symmetrical parts or multi-cavity molds, and makes the entire filling process more balanced. After dividing the first flow channel and the second flow channel, the flow length is reduced, avoiding the large and long residual material in the flow channel in traditional flow channel gates (such as a single large fan-shaped gate), which is prone to warping deformation.

[0017] Another objective of this invention is to provide an aluminum alloy mobile phone mid-plate mold, the purpose of which is to provide a mold that allows multi-cavity molds to be filled evenly.

[0018] As a preferred embodiment of the aluminum alloy mobile phone middle plate mold of this utility model, it includes: a flow channel structure, and further includes,

[0019] The mold body has a cavity, and the cavity is connected to the end face of the ingate along the liquid flow direction.

[0020] External gate, from which liquid flows into the first runner channel;

[0021] The slag bag can be placed at any other position in the first flow channel or the second flow channel;

[0022] Exhaust duct, used to discharge exhaust gas.

[0023] In a preferred embodiment of the aluminum alloy mobile phone middle plate mold of this utility model, the venting groove is connected to the slag bag through a connecting port.

[0024] As a preferred embodiment of the aluminum alloy mobile phone middle plate mold of this utility model, the slag bag is provided in three groups, and the three groups of slag bags are provided in the cavity along three other orthogonally distributed directions other than the first flow channel groove and the second flow channel groove direction.

[0025] As a preferred embodiment of the aluminum alloy mobile phone middle plate mold of this utility model, the cavity is provided in two sets, and the two sets of cavities are arranged in the same horizontal direction.

[0026] In a preferred embodiment of the aluminum alloy mobile phone middle plate mold of this utility model, the venting groove includes a first venting groove and a second venting groove, the first venting groove and any number of slag bags are connected through a connecting port, and the second venting groove and the remaining slag bags are connected through a connecting port.

[0027] The beneficial effects of this utility model are as follows: It adopts a special flow channel structure and a precision cavity, which can adapt to the thin wall thickness requirements of aluminum alloy mobile phone plates. By reasonably setting the connection method between the gate and the flow channel, it can ensure that the die casting liquid fills the mold cavity quickly and evenly while maintaining the injection pressure, effectively avoiding the generation of defects such as cold shut and short shot, and ensuring the integrity and structural strength of the molded parts. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A three-dimensional view of the flow channel structure is shown;

[0030] Figure 2 A top view of the flow channel structure is shown;

[0031] Figure 3 The side and front view projections of the stepped tapering section structure are shown;

[0032] Figure 4 A top view of the accommodating cavity is shown;

[0033] Figure 5 A side view of the flow channel structure is shown;

[0034] Figure 6 A top view of Embodiment 2 is shown;

[0035] Figure 7 A top view of Embodiment 3 is shown. Detailed Implementation

[0036] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0037] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0038] Example 1, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This embodiment provides a flow channel structure, including a first flow channel a and a plurality of second flow channels b; and the first flow channel a and the plurality of second flow channels b are connected.

[0039] Wherein, the volume between the first end a1 of the first flow channel a and the second end b1 of any second flow channel b is the same; the other end b2 of the second flow channel b is provided with an adjustment section c, one end of the adjustment section c is connected to the second flow channel b, the other end is connected to the adjacent adjustment section c, and the volume of the adjustment section c gradually decreases along the direction away from the first flow channel a.

[0040] The regulating section c is a stepped contraction section structure c1, which includes a first contraction section e1, a holding section e2, and a second contraction section e3. The height of the first contraction section e1 and the second contraction section e3 gradually decreases along the liquid flow direction, while the height of the holding section e2 remains consistent. One end of the second contraction section e3 is connected to the second flow channel b. The regulating section c is a receiving cavity c2. The receiving cavity c2 gradually decreases in volume along the direction away from the first flow channel a, and the receiving cavity c2 expands outward along the die casting liquid flow direction to form a convex shape.

[0041] The second runner b is connected to an ingate d at one end along the liquid flow direction. The cross-sectional height of the ingate d is smaller than that of the second runner b, and the cross-sectional width of the ingate d is larger than that of the second runner b. The second runner b is formed by the second runner groove 102. The regulating section c is formed at the connection position of the first runner groove 101 and the second runner groove 102.

[0042] During use, the die-casting liquid first enters the first flow channel a through the mold inlet. The first flow channel a has a uniform cross-sectional structure, preferably a trapezoidal shape, and is arranged with relatively equal lengths in front of multiple branch nodes, thereby maintaining good pressure balance and flow rate consistency in the initial flow stage.

[0043] After the die-casting liquid continues to flow to the first end a1 of the first flow channel, it enters several second flow channels b. The structure in the claim ensures that the overall channel volume between the first end a1 of the first flow channel and the second end b1 of any second flow channel b remains equal, thereby ensuring that the aluminum liquid in each branch has consistent volume propulsion conditions in the flow path and avoiding inconsistent liquid front propulsion speeds due to structural differences.

[0044] At one end of the second flow channel b, that is, on the side closer to the first flow channel a, there is an adjustment section c. One end of the adjustment section c1 is connected to the second flow channel b, and the other end is connected to the adjacent adjustment section c1. The overall volume of the section gradually decreases along the direction away from the first flow channel a. This structure serves to adjust the flow velocity and synchronize the propulsion.

[0045] The regulating section c can take various structural forms:

[0046] One type is a stepped contraction section structure c1, which consists of a first contraction section e1, a holding section e2, and a second contraction section e3 in sequence. The height of the first contraction section e1 and the second contraction section e3 gradually decreases along the liquid flow direction, while the holding section e2 maintains a constant height. This stepped structure forms a slow-release pressure regulation and velocity transition region by gradually reducing the channel height and alternately setting contraction and stabilization zones. This allows the aluminum liquid to re-establish a stable velocity field and pressure state within each holding section, avoiding sudden changes in flow rate.

[0047] Another form is the cavity structure e1, which forms a locally convex outward expansion structure at the end of the channel along the flow direction. The volume gradually decreases in the direction away from the first flow channel a. By expanding the local volume, a buffer volume space is provided to achieve the delay of liquid kinetic energy and the reduction of flow peaks.

[0048] Molten aluminum flows into the mold cavity from the second runner b through the ingate d. The ingate has a rectangular cross-section structure (preferably 15mm × 1mm) with a relatively small height and a large width. This structure can transform the originally linear advancement of molten aluminum into a planar injection, allowing the molten aluminum to spread rapidly into the mold cavity in a wide pattern. It is particularly suitable for efficient filling of large-area thin-walled die castings (e.g., 102mm × 75mm × 4mm, with the thinnest part in the middle reaching 1.6mm).

[0049] Throughout the flow process, due to the flow resistance control of the equal volume matching adjustment section from the main flow channel a to the end of each second flow channel b, the leading edge of the aluminum liquid in multiple second flow channels can be kept roughly synchronized, thus improving the problem of "center first, sides lagging" in the filling process.

[0050] Example 2, refer to Figure 6 This is the second embodiment of the present invention, providing an aluminum alloy mobile phone middle plate mold. This device includes a flow channel structure, and further includes: a mold body 100, on which a cavity 103 is provided, and the cavity 103 is connected to the end face of the inner gate d along the liquid flow direction; an outer gate 104, from which liquid flows into the first flow channel groove 101; a slag bag 105, disposed at any other position in the first flow channel groove 101 and the second flow channel groove 102; and an exhaust groove 106 for discharging waste gas.

[0051] The exhaust groove 106 is connected to the slag bag 105 through the connection port 107. There are three sets of slag bags 105. The three sets of slag bags 105 are arranged in the cavity 103 along the other three directions, except for the first flow channel groove 101 and the second flow channel groove 102.

[0052] During use, the die casting liquid is injected into the outer gate 104 by the die casting equipment, passes through the first runner 101, undergoes pressure guidance and cross-sectional transition at the transition section c, enters the second runner 102 and passes through the inner gate d, so that the die casting liquid enters the cavity 103 to fill and form.

[0053] In addition to the paths of the first flow channel 101 and the second flow channel 102 requiring liquid to flow through, slag bags 105 can be arranged in any direction on the same plane, including orthogonal distribution and oblique distribution. The shape of the slag bag 105 is preferably cuboid, and it passes through the exhaust channel 106 arranged on the same plane. The cross-section of the exhaust channel 106 can be circular or rectangular, preferably rectangular.

[0054] During the molding process, three sets of slag bags 105 are orthogonally distributed in the three directions of the cavity 103 except for the feeding direction, so that each non-feeding direction has an independent impurity interception and gas buffering area. During the die casting filling process, after the die casting liquid enters the cavity 103, it will preferentially fill the main structural area. Since the slag bag 105 is located close to the edge, the gas and inclusions in the die casting liquid will enter the area with the flow end. At the same time, the three sets of slag bags 105 are connected to the exhaust groove 106 through the connection port 107 respectively, forming a surrounding exhaust system, which significantly improves the exhaust efficiency.

[0055] While maintaining stable filling, it effectively avoids defects such as pores and slag inclusions caused by closed dead corners. It can collect low-quality metals such as oxide inclusions and initial cooling die casting liquid during the early filling process and prevent them from entering the product forming area. The end of each slag bag is connected to the venting groove 106 through the connection port 107, so that an effective venting channel is formed inside the mold cavity during the high-pressure filling process, preventing pore defects caused by gas retention.

[0056] After the filling is completed, the die casting liquid cools and solidifies rapidly. The overall structure of the middle plate is defined by the cavity 103 to ensure its dimensional and wall thickness accuracy. Finally, the finished product is removed, and the inner gate d and runner residue are cut off to obtain the final product.

[0057] Example 3, referring to Figure 7 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that: the cavity 103 is provided in two sets, and the two sets of cavities 103 are arranged in the same horizontal direction. The exhaust groove 106 includes a first exhaust groove 1061 and a second exhaust groove 1062. The first exhaust groove 1061 and any number of slag bags 105 are connected through a connection port 107, and the second exhaust groove 1062 and the remaining slag bags 105 are connected through a connection port 107.

[0058] Compared to Example 2, the cavity 103 is further configured into two groups, and the two groups of cavities 103 are arranged in the same direction along the horizontal direction to achieve a parallel production layout of two cavities in one mold. Compared with Example 2, an additional cavity 103 is added, which allows two to be molded at the same time in one pour, thereby further improving production efficiency.

[0059] After the die casting liquid is injected, the two cavities 103 will be filled with die casting liquid at the same time. Therefore, higher requirements are placed on flow balance and venting zoning. In this embodiment, the venting channel 106 is divided into the first venting channel 1061 and the second venting channel 1062, which are connected to the slag bags 105 at different positions through the connection port 107, thereby forming a grouped venting path.

[0060] During operation, after the die-casting liquid fills the two cavities 103 respectively, the internal gas and inclusions will be discharged through the nearest slag bag 105 and quickly discharged through the first venting groove 1061 and the second venting groove 1062 respectively, to prevent poor filling or residual gas entrainment caused by venting path blockage.

[0061] The remaining structure is the same as that in Example 2.

[0062] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0063] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A flow channel structure, characterized in that: include, First flow channel (a) and several second flow channels (b); and, The first flow channel (a) is connected to several second flow channels (b); The volume between the first end (a1) of the first flow channel (a) and the second end (b1) of any second flow channel (b) is the same.

2. The flow channel structure according to claim 1, characterized in that: An adjustment section (c) is provided at the other end (b2) of the second flow channel (b). One end of the adjustment section (c) is connected to the second flow channel (b), and the other end is connected to the adjacent adjustment section (c). The volume of the adjustment section (c) gradually decreases along the direction away from the first flow channel (a).

3. The flow channel structure according to claim 2, characterized in that: The regulating section (c) is a stepped contraction section structure (c1). The stepped contraction section structure (c1) includes a first contraction section (e1), a holding section (e2), and a second contraction section (e3). The height of the first contraction section (e1) and the second contraction section (e3) gradually decreases along the liquid flow direction. The height of the holding section (e2) remains consistent. One end of the second contraction section (e3) is connected to the second flow channel (b).

4. The flow channel structure according to claim 2, characterized in that: The regulating section (c) is a receiving cavity (c2). The volume of the receiving cavity (c2) gradually decreases along the direction away from the first flow channel (a). The receiving cavity (c2) expands outward along the flow direction of the die casting liquid to form a convex shape.

5. The flow channel structure according to any one of claims 2, 3, and 4, characterized in that: The second runner (b) is connected to an ingate (d) at one end along the liquid flow direction. The cross-sectional height of the ingate (d) is smaller than the cross-sectional height of the second runner (b), and the cross-sectional width of the ingate (d) is larger than the cross-sectional width of the second runner (b). The second flow channel (b) is formed by the second flow channel groove (102); The adjustment section (c) is formed at the connection point of the first flow channel groove (101) and the second flow channel groove (102).

6. A mold for an aluminum alloy mobile phone mid-plate, characterized in that: Including the flow channel structure as described in any one of claims 1-5, further comprising: The mold body (100) has a cavity (103) thereon, and the cavity (103) is connected to the end face of the ingate (d) along the liquid flow direction; External gate (104), liquid flows from external gate (104) into the first runner channel (101); Slag bag (105) is set at any other position in the first flow channel (101) and the second flow channel (102); Exhaust duct (106) is used to discharge exhaust gas.

7. The aluminum alloy mobile phone middle plate mold according to claim 6, characterized in that: The exhaust trough (106) is connected to the slag bag (105) through the connection port (107).

8. The aluminum alloy mobile phone middle plate mold according to claim 7, characterized in that: The slag packs (105) are provided in three groups. The three groups of slag packs (105) are provided in the cavity (103) in three orthogonal directions other than the directions of the first flow channel groove (101) and the second flow channel groove (102).

9. The aluminum alloy mobile phone middle plate mold according to claim 8, characterized in that: The cavity (103) is provided in two sets, and the two sets of cavities (103) are arranged in the same horizontal direction.

10. The aluminum alloy mobile phone middle plate mold according to claim 8 or 9, characterized in that: The exhaust trough (106) includes a first exhaust trough (1061) and a second exhaust trough (1062). The first exhaust trough (1061) and any number of slag bags (105) are connected through a connection port (107). The second exhaust trough (1062) and the remaining slag bags (105) are connected through a connection port (107).

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