CN-224226906-U - Forming die core for back cover volcanic vent of mobile phone

Abstract

The utility model discloses a volcanic vent forming die core of a mobile phone rear cover, which relates to the technical field of dies and comprises an upper die core and a lower die core which can be oppositely clamped, wherein a clamping surface of the upper die core is convexly provided with a base part which is matched with the shape of the mobile phone rear cover, any corner of the top surface of the base part is convexly provided with at least one forming part, at least one edge of the forming part is provided with a round corner, the radius of the round corner is R, the top surface of each forming part is convexly provided with a limiting part for limiting the pressing depth of the upper die core, and the side wall edge of each limiting part is perpendicular to the edge of the forming part. The utility model can effectively limit the pressing depth of the upper die core, avoid excessive pressing, ensure the dimensional accuracy of the R angle at the formed crater, and obviously improve the appearance quality of the final product.

Inventors

• CAO QI
• HUANG QIUSHENG
• FU YALI
• ZENG XIANGRONG

Assignees

• 通达(石狮)科技有限公司

Dates

Publication Date

20260512

Application Date

20250516

Claims (7)

1. 1. The molding die core is characterized in that the die clamping surface of the upper die core is convexly provided with a base matched with the shape of the mobile phone rear cover, any corner of the top surface of the base is convexly provided with at least one molding part, at least one edge of the molding part is provided with a round corner, the radius of the round corner is R, the top surface of each molding part is convexly provided with a limiting part for limiting the pressing depth of the upper die core, and the edge of the side wall of the limiting part is perpendicular to the edge of the molding part.
2. 2. The back cover crater mold core of claim 1, wherein the mold surface of the lower mold core is concave with a first concave cavity corresponding to the base part and having a shape matching with the base part, and the bottom wall of the first concave cavity is concave with a second concave cavity corresponding to the forming part and having a shape matching with the forming part.
3. 3. The molding die of the back cover of a mobile phone as set forth in claim 1, wherein the radius R of the fillet of the molding part is 1.2-1.5mm.
4. 4. The molding die of the back cover of a mobile phone as set forth in claim 1, wherein the height of the limiting portion is 0.08-0.1mm.
5. 5. The molding die of the back cover of a mobile phone as set forth in claim 1, wherein the molding portion is any one of rectangular, circular, triangular, elliptical and polygonal.
6. 6. The back cover crater mold core of a mobile phone according to any one of claims 1 to 5, wherein the molding part is two circular protrusions arranged at intervals along a straight line, and the top surface of each circular protrusion is provided with the limiting part.
7. 7. The molding die of a back cover of a mobile phone as set forth in any one of claims 1 to 5, wherein the molding portion is a plurality of round protrusions arranged at intervals, the plurality of round protrusions are distributed in a triangular shape, and the top surface of each round protrusion is provided with the limiting portion.

Description

Forming die core for back cover volcanic vent of mobile phone Technical Field The utility model relates to the technical field of molds, in particular to a volcanic vent forming mold core of a mobile phone rear cover. Background Along with the continuous development of the smart phone market, the design and the material of the mobile phone shell gradually become one of important concerns in the mobile phone manufacturing process. The glass fiber material has been widely used in the manufacture of mobile phone rear covers due to its excellent mechanical properties, thermal stability and light weight characteristics, especially in high-end mobile phones, and not only improves the appearance texture of the mobile phone, but also effectively enhances the durability and the compression resistance of the mobile phone. In the design of the glass fiber rear cover, the shape of the crater (namely, the raised area formed on the surface of the rear cover) gradually becomes a unique design element, and the crater design not only improves the aesthetic property of the mobile phone, but also further improves the anti-falling capability and the compressive strength of the mobile phone by changing the structure of the rear cover. Therefore, the crater forming process is increasingly widely applied to the production of the mobile phone rear cover. In the traditional molding process of the glass fiber rear cover volcanic vent of the mobile phone, the manufacture of the mold is particularly critical. In general, according to the requirements of customers, a designer will manufacture a mold matching with the requirements of the crater according to the molding requirements of the crater, and the molding method of the traditional mold is mainly realized by mechanical pressing or injection molding technology, and in the design of the mold, the female mold and the male mold need to be manufactured accurately according to the shape of the crater. However, when the mold forming mode is adopted, a technical problem is often faced in the actual production process, namely that the R angle (namely the smoothness of the curve) formed by the mold cannot meet the design requirement. The problem mainly stems from stress concentration in the process of forming the crater, particularly in the crater area, the hardness of glass fiber materials is higher, uneven stress distribution is easily caused in the process of forming, if the accurate depth limit is lacking in the process of pressing a die, excessive pressing of an upper die (male die) is often caused during pressing, the shape of a part is influenced, particularly in the crater area, an unsatisfactory shape is easily generated, the curved surface quality of a formed rear cover in the crater area is influenced, and the appearance and the service performance of the rear cover are possibly influenced. In view of the above, the present inventors have conducted intensive studies on the above problems, and have made the present invention. Disclosure of utility model The utility model provides a volcanic-mouth forming die core for a mobile phone rear cover, and aims to solve the problem that an R angle does not reach the standard due to excessive downward pressing in the forming process of an existing die. In order to solve the technical problems, the utility model adopts the following technical scheme: The utility model provides a lid crater moulded die benevolence behind cell-phone, but including the last mould benevolence of relative compound die and lower mould benevolence, the compound die face protruding of above-mentioned last mould benevolence is equipped with the base that coincides with lid shape behind the cell-phone, arbitrary angle protruding of above-mentioned base top surface is equipped with at least one shaping portion, at least one edge of above-mentioned shaping portion has the fillet, the radius of above-mentioned fillet is R, the protruding restriction portion that is used for restricting the upper mould benevolence depression degree of depth that is equipped with of top surface of every above-mentioned shaping portion, the lateral wall edge perpendicular to of above-mentioned restriction portion is marginal. Further, a first concave cavity corresponding to the base part in position and matching in shape is concavely arranged on the die closing surface of the lower die core, and a second concave cavity corresponding to the forming part in position and matching in shape is concavely arranged on the bottom wall of the first concave cavity. Further, the fillet radius R of the molding part is 1.2-1.5mm. Further, the height of the restriction part is 0.08-0.1mm. Further, the molding part may be any one of a rectangle, a circle, a triangle, an ellipse, and a polygon. Further, the forming part is two circular protrusions which are arranged at intervals along the straight line direction, and the top surface of each circular protrusion is provided with the limiting part. Further, th