Hot extrusion die for producing mobile phone backboard profile

Abstract

The utility model discloses a hot extrusion die for producing a mobile phone backboard profile, which comprises a die body, the die body comprises an upper die and a lower die, the upper die is internally provided with a cavity used for hot extrusion forming of a mobile phone backboard, the top of the upper die is also provided with a flow guide hole used for guiding an aluminum flow to enter the cavity, and the lower die is arranged at the bottom of the upper die and used for guiding the aluminum flow to enter the cavity. And a discharge hole communicated with the cavity is formed in the extrusion die and is used for extruding the mobile phone backboard profile. By arranging the plane section, the inclined plane and the cambered surface section, the friction force between aluminum flow and the interior of the flow guide hole is reduced, namely, the flow resistance is small, and the aluminum flow can stably and smoothly enter the cavity through the flow guide hole, so that when the die body is used for extruding and separating residual materials, the phenomenon that the residual materials are separated due to overlarge resistance is avoided; unformed aluminum alloy in the flow guide hole is pulled out, so that air is prevented from entering the flow guide hole, and continuous production of the mobile phone backboard is guaranteed.

Description

Technical Field

[0001] The utility model specifically relates to a hot extrusion die for producing a mobile phone back panel profile. Background Art

[0002] The back panel of a mobile phone is an important part of the design of a smart phone. It is not only related to the appearance of the mobile phone, but also to the durability and practicality of the mobile phone. In the manufacturing of modern smart phones, the production of mobile phone back panel profiles involves a variety of materials and processing technologies. Among them, hot pressing is a common technology. It is suitable for producing specific types of mobile phone back panels, such as composite sheet back panels. This type of mobile phone back panel combines many advantages of 3D curved glass structural parts, such as high brightness, high hardness and scratch resistance, and has rich colors, diverse textures and a light and thin appearance.

[0003] At present, when the back panel of the mobile phone is produced, an extrusion residue separation operation is usually performed. However, as shown in the figure, the inlet and outlet of the guide hole of the existing hot extrusion mold for producing the back panel of the mobile phone are usually set to a bow-tie shape, and the cross-section is usually set to a rectangular shape with rounded corners. Such a design makes it easy for the hot extrusion mold of the mobile phone back panel to pull out the unformed aluminum alloy in the guide hole when performing the extrusion residue separation operation, causing air to enter the guide hole, which needs to be adjusted, resulting in the inability to continuously produce the mobile phone back panel profile, and the appearance quality of the mobile phone back panel profile during molding cannot be guaranteed.

[0004] Therefore, it is necessary to invent a hot extrusion die for producing a mobile phone back panel profile to solve the above problems. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes a hot extrusion die for producing mobile phone back panel profiles. By setting a flat section, an inclined surface, and a curved surface section, the mold body will not pull out the unformed aluminum alloy in the guide hole due to excessive resistance when separating the extruded residual material, thereby avoiding air from entering the guide hole and ensuring the continuous production of the mobile phone back panel.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot extrusion die for producing a mobile phone back panel profile, comprising a mold body, wherein the mold body comprises an upper mold, a cavity is provided inside the upper mold, and the upper mold is provided with a guide hole at the top for guiding aluminum flow into the cavity;

[0009] A lower mold is installed at the bottom of the upper mold, and is provided with a discharge hole connected to the mold cavity, for extruding the mobile phone back panel profile;

[0010] Among them, the hole wall of the guide hole gradually spreads outward from top to bottom to form an inclined surface, and a flat section is reserved in the hole wall at the entrance of the guide hole, and an arc section is arranged on the hole wall at the exit, so that when the mold body is separated by extrusion residue, the mobile phone back panel profile will not be pulled out by mistake.

[0011] Preferably, the upper die and the lower die are tightly fitted to each other via a locking piece.

[0012] Preferably, the mold cavity includes a first cavity and a second cavity located below the first cavity, and the hole wall of the second cavity is gradually diffused outward from top to bottom.

[0013] Preferably, the first cavity, the second cavity, and the discharge hole are arranged in a stepped shape as a whole.

[0014] Preferably, the peripheries of the cavity and the hole wall of the discharge hole are both configured as sharp corners.

[0015] Preferably, the inlet and outlet of the guide hole are both arranged in a bow-tie shape.

[0016] Preferably, the upper mold and the lower mold are both configured to be disc-shaped.

[0017] Compared with the prior art, the above technical solution of the utility model has the following beneficial effects:

[0018] The utility model reduces the friction between the aluminum flow and the guide hole by arranging the plane section, the inclined surface, and the arc surface section, that is, the flow resistance is small, and the aluminum flow can smoothly and stably enter the cavity through the guide hole. Therefore, when the mold body is separating the extruded residual material, the unformed aluminum alloy in the guide hole will not be pulled out due to excessive resistance, thereby preventing air from entering the guide hole, thereby ensuring the continuous production of the mobile phone back panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

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

[0021] Figure 2 It is an exploded view of the utility model;

[0022] Figure 3 It is a cross-sectional view of the utility model;

[0023] Figure 4 It is a cross-sectional view of the back panel profile of a mobile phone;

[0024] Figure 5 It is a schematic diagram of the structure of an existing mobile phone back panel hot extrusion die.

[0025] Description of reference numerals:

[0026] 1 mold body;

[0027] 2 upper mold, 21 mold cavity, 211 first cavity, 212 second cavity, 22 guide hole, 23 inclined surface, 24 plane segment, 25 arc segment;

[0028] 3 lower molds, 31 discharge holes. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The utility model provides Figure 1-3 A hot extrusion die for producing a mobile phone back panel profile is shown, comprising a die body 1, wherein the die body 1 comprises:

[0031] The upper mold 2 has a cavity 21 formed therein for hot extrusion molding of the mobile phone back panel, and a guide hole 22 is formed on the top of the upper mold 2 for guiding the aluminum flow into the cavity 21;

[0032] The lower mold 3 is installed at the bottom of the upper mold 2, and is provided with a discharge hole 31 connected to the mold cavity 21, for extruding the mobile phone back panel profile;

[0033] The hole wall of the guide hole 22 gradually spreads outward from top to bottom to form an inclined surface 23, and a plane section 24 is reserved in the hole wall at the entrance of the guide hole 22, and an arc surface section 25 is provided on the hole wall at the exit, so that when the mold body 1 is extruded and the residual material is separated, the mobile phone back panel profile will not be pulled out by mistake.

[0034] In one embodiment, the upper mold 2 and the lower mold 3 are tightly fitted with each other through locking parts, thereby ensuring the stability of the mold during the production of the mobile phone back panel. The upper mold 2 and the lower mold 3 are both configured to be disc-shaped. The disc-shaped upper mold 2 and the lower mold 3 are convenient for operators to install, debug and maintain the mold, thereby improving the convenience of operation. Compared with traditional rectangular or complex-shaped molds, they are more compact and occupy less space, which is beneficial to the space layout and saving of the production line.

[0035] In one embodiment, the mold cavity 21 includes a first cavity 211 and a second cavity 212 located below the first cavity. The hole wall of the second cavity 212 is gradually diffused outward from top to bottom, thereby enhancing the structural strength of the mold body 1 so that it can withstand higher extrusion pressure. The first cavity 211, the second cavity 212, and the discharge hole 31 are arranged as a whole in a stepped shape. The stepped design helps to maintain the relative position stability of the mold cavity 21 and the discharge hole 31, facilitates the extrusion molding of the mobile phone back panel, and ensures that the surface of each produced mobile phone back panel profile is not affected and has a consistent size and shape.

[0036] In one embodiment, the peripheries of the cavity 21 and the discharge hole 31 are configured as sharp corners, which helps to reduce stress concentration of the aluminum flow during the forming process and reduces the occurrence of forming defects in the back panel of the mobile phone.

[0037] In one embodiment, the inlet and outlet of the guide hole 22 are both set to a bow-tie shape. The bow-tie-shaped inlet design allows the aluminum flow to flow into the guide hole 22 more smoothly, reduces the turbulence of the aluminum flow and the entrapment of air, thereby improving the molding quality of the mobile phone back panel, and can avoid the aluminum flow from flowing back during extrusion, ensuring that the aluminum flow is extruded more effectively, thereby improving the production efficiency of the mobile phone back panel.

[0038] The specific implementation mode is as follows: when the utility model is in use, aluminum flows through the guide hole 22 into the cavity 21, and then is formed into a brake pad and extruded through the discharge hole 31, and the cavity 21 and the discharge hole 31 are arranged as a whole in a stepped shape, which can ensure that the surface of the formed brake pad is not affected during extrusion, thereby ensuring the quality of the finished product;

[0039] Specifically, the plane section 24 at the entrance of the guide hole 22 can not only prevent the aluminum flow from accumulating at the entrance of the guide hole 22, but also provide a stable flow platform for the aluminum flow, thereby preventing the aluminum flow from being turbulent during the flow process, and making the aluminum flow stable and evenly distributed;

[0040] The inclination angle of the inclined surface 23 is set to 8-12 degrees, so that when the aluminum flow enters the cavity 21, its flow path gradually becomes larger, and it can flow into the cavity 21 more smoothly, reducing the flow resistance of the aluminum flow. At the same time, the inclined surface section that gradually diffuses outward from top to bottom can also reduce the shear force on the aluminum flow, thereby preventing the mobile phone back panel from being deformed during molding;

[0041] The design of the arc surface segment 25 allows the aluminum to smoothly flow into the cavity 21 when it flows out through the guide hole 22, thereby alleviating the impact on the aluminum flow, reducing stress concentration, reducing molding defects of the mobile phone back panel, and improving its surface quality;

[0042] In summary, by providing the plane section 24, the inclined surface 23, and the arc surface section 25, the friction between the aluminum flow and the guide hole 22 is reduced, that is, the flow resistance is small, so that the aluminum flow can smoothly pass through the guide hole 22 into the cavity 21, so that when the mold body 1 is separating the extruded residual material, the unformed aluminum alloy in the guide hole 22 will not be pulled out due to excessive resistance, thereby preventing air from entering the guide hole 22, ensuring the continuous production of the mobile phone back panel;

[0043] This embodiment specifically solves the problem in the prior art that the current mobile phone back panel hot extrusion die is prone to pull out the unformed aluminum alloy in the guide hole 22 during the extrusion residue separation operation, causing air to enter the guide hole 22 and requiring adjustment, resulting in the inability to continuously produce the mobile phone back panel profile and the inability to guarantee the appearance quality of the mobile phone back panel profile during forming.

[0044] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hot extrusion die for producing a mobile phone back panel profile, comprising a die body (1), characterized in that: The mold body (1) comprises: An upper mold (2) is provided with a mold cavity (21) therein for hot extrusion molding of a mobile phone back panel, and a guide hole (22) is also provided at the top of the upper mold (2) for guiding aluminum flow into the mold cavity (21); A lower mold (3) is mounted on the bottom of the upper mold (2), and is provided with a discharge hole (31) in the interior thereof, which is connected to the mold cavity (21) and is used for extruding the mobile phone back panel profile; The hole wall of the guide hole (22) gradually spreads outward from top to bottom to form an inclined surface (23), and a plane section (24) is reserved on the hole wall at the entrance of the guide hole (22), and a curved surface section (25) is provided on the hole wall at the exit, so that when the mold body (1) is extruded and the residual material is separated, the mobile phone back panel profile will not be pulled out by mistake.

2. A hot extrusion die for producing a mobile phone back panel profile according to claim 1, characterized in that: The upper die (2) and the lower die (3) are tightly fitted to each other via a locking piece.

3. The hot extrusion die for producing a mobile phone back panel profile according to claim 1, characterized in that: The mold cavity (21) comprises a first cavity (211) and a second cavity (212) located below the first cavity, wherein the hole wall of the second cavity (212) is gradually diffused outward from top to bottom.

4. A hot extrusion die for producing a mobile phone back panel profile according to claim 3, characterized in that: The first cavity (211), the second cavity (212), and the discharge hole (31) are arranged in a stepped shape as a whole.

5. The hot extrusion die for producing a mobile phone back panel profile according to claim 1, characterized in that: The peripheries of the hole walls of the cavity (21) and the discharge hole (31) are both arranged to be sharp corners.

6. The hot extrusion die for producing a mobile phone back panel profile according to claim 1, characterized in that: The inlet and outlet of the guide hole (22) are both arranged in a bow-tie shape.

7. The hot extrusion die for producing a mobile phone back panel profile according to claim 1, characterized in that: The upper mold (2) and the lower mold (3) are both configured in a disc shape.

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