A mobile phone middle plate die-casting mold
By adopting a double-sided glue inlet and guide surface design in the die-casting mold of the mobile phone mid-plate, the problem of uneven material filling caused by the reduction of battery compartment thickness is solved, realizing uniform material flow and sufficient supply, and improving the molding quality and production efficiency of the mid-plate.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINHE (DONGGUAN) HARDWARE TECH CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-06-09
AI Technical Summary
During the die casting process of mobile phone mid-plate, the reduced thickness of the battery compartment makes it difficult for the molten material to fill the mold cavity evenly, resulting in molding defects such as sand holes and poor density, which affect the quality and performance of the mid-plate.
The dual-side injection design allows the die-casting material to enter the cavity directly from both sides of the mold, avoiding the thin area of the battery compartment. Combined with the inclined guide surface and staggered end injection design, it ensures uniform material flow and sufficient supply.
It improves the forming quality and mechanical properties of the medium plate, reduces defects such as sand holes and poor density, enhances product consistency and production stability, and reduces the defect rate and production cost.
Smart Images
Figure CN224333407U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of die-casting molds, and in particular to a die-casting mold for a mobile phone mid-plate. Background Technology
[0002] Today, the trend towards thinner and lighter smartphones has become mainstream in the industry. To align with this trend, the thickness of the battery compartment in the phone's mid-plate has been significantly reduced from 0.5mm to 0.3mm. This change has yielded remarkable results, making the phone appear slimmer and more refined, while also improving user comfort and meeting market demand for lightweight and portable smartphones.
[0003] However, this thinner battery compartment design also presents new challenges. During the die-casting process, because the thickness of the intermediate battery compartment is only 0.3 mm, the molten material faces significant difficulties passing through this area. This makes it difficult for the material to fully and evenly fill the mold cavity, resulting in poor molding in some parts of the phone's mid-plate. Specifically, these areas exhibit poor density and severe surface porosity. These defects not only affect the aesthetics of the phone's mid-plate but may also adversely impact its performance and lifespan, thus necessitating the exploration of effective solutions. Summary of the Invention
[0004] In order to improve the uniformity of the distribution of the injection material during the die casting process, this utility model provides a die casting mold for the middle plate of a mobile phone.
[0005] This utility model provides a technical solution that adopts the following approach:
[0006] A die-casting mold for a mobile phone mid-plate includes a mold body and two glue inlets located on both sides of the mold along its width direction. The two glue inlets are connected to the cavity of the mold body, and the glue inlets are used to connect to the discharge end of the die-casting material conveying structure.
[0007] The design of the side injection points allows the die-casting material to enter the cavity directly from both sides of the mold without passing through the thin section of the battery compartment. This effectively avoids material flow bottlenecks and ensures that the material can fill the mold sufficiently and smoothly. As a result, the battery compartment ribs on the slag discharge side can receive sufficient material supply and be completely formed, greatly reducing the probability of defects such as sand holes and poor density.
[0008] This dual-sided injection method reduces molding defects and improves the overall quality and mechanical properties of the phone's mid-plate. The uniform flow of material within the cavity also improves product consistency, reduces defect rates and rework rates, enhances production continuity and stability, and ultimately lowers production costs.
[0009] Preferably, the glue inlet is elongated and bucket-shaped, the length direction of the glue inlet is consistent with the length direction of the mold body, and one side of the glue inlet along its width direction is integrally connected to one side of the mold body along its width direction.
[0010] Preferably, the cross-section of the glue inlet portion perpendicular to the bottom of the mold body along its width direction is an arc-shaped cross-section, and the bottom wall of the cross-section near the mold body is inclined to form a guide surface from the bottom wall of the glue inlet portion to the glue inlet edge of the mold body.
[0011] The inclined bottom wall forms a guiding surface that precisely guides the molten material towards the injection edge of the mold body. This guiding effect allows the material to enter the mold cavity more directly, reducing disordered diffusion and backflow during injection, and improving the directionality and efficiency of material flow. Furthermore, it allows the molten material to conform more closely to the wall of the injection section, avoiding flow obstruction caused by sharp corners and abrupt changes in shape.
[0012] Preferably, the lengths of the glue injection portions on both sides of the mold body are not the same.
[0013] Preferably, the distances from the ends of the two injection points to both ends of the mold body are not the same. The distance from one end of one injection point to the end closest to the mold body is shorter than the distance from the same end of the other injection point to the same end of the mold body, while the distance from its other end to the other end of the mold body is longer than the distance from the other end of the other injection point to the other end of the mold body.
[0014] This design incorporates two staggered injection points, each extending one end towards both ends of the mold body along its length. Firstly, the opposing portions of the two injection points ensure uniform injection of glue into the middle plate, resulting in even material distribution throughout the plate during die casting and guaranteeing consistent overall performance. Secondly, the extension of both injection points to the ends of the mold body allows for supplementary injection at both ends. In actual die casting, the uniformity of glue injection on both sides of the mold is fully considered, while the ends of the mold body are also adequately filled, significantly reducing product defects caused by uneven glue injection. This improves the uniformity of glue injection during die casting, thereby enhancing the molding quality of the mobile phone middle plate.
[0015] In summary, this utility model has the following beneficial technical effects:
[0016] The design of the side injection points allows the die-casting material to enter the cavity directly from both sides of the mold without passing through the thin section of the battery compartment. This effectively avoids material flow bottlenecks and ensures that the material can fill the mold sufficiently and smoothly. As a result, the battery compartment ribs on the slag discharge side can receive sufficient material supply and be completely formed, greatly reducing the probability of defects such as sand holes and poor density. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a mobile phone mid-plate die-casting mold according to the present invention.
[0018] Explanation of reference numerals in the attached drawings: 1. Mold body; 2. Inlet; 3. Guide surface. Detailed Implementation
[0019] The following is in conjunction with the appendix Figure 1 The present invention will be described in further detail below.
[0020] This utility model discloses a die-casting mold for a mobile phone mid-plate.
[0021] Reference Figure 1 A die-casting mold for a mobile phone mid-plate includes a mold body 1 and two glue inlet sections 2 located on both sides of the mold along its width direction. The two glue inlet sections 2 are connected to the cavity of the mold body 1, and the glue inlet sections 2 are used to connect to the discharge end of the die-casting material conveying structure.
[0022] The inclusion of two side injection points 2 allows the die-casting material to enter the cavity directly from both sides of the mold without passing through the thin section of the battery compartment. This effectively avoids material flow bottlenecks and ensures that the material can fill the mold sufficiently and smoothly. As a result, the battery compartment ribs on the slag discharge side can receive sufficient material supply and be completely formed, greatly reducing the probability of defects such as sand holes and poor density.
[0023] This dual-sided injection method reduces molding defects and improves the overall quality and mechanical properties of the phone's mid-plate. The uniform flow of material within the cavity also improves product consistency, reduces defect rates and rework rates, enhances production continuity and stability, and ultimately lowers production costs.
[0024] Reference Figure 1 In this embodiment, the glue injection part 2 is in the shape of a long bucket. The length direction of the glue injection part 2 is consistent with the length direction of the mold body 1. The glue injection part 2 is integrally connected to the width direction of the mold body 1 on one side along its own width direction.
[0025] Reference Figure 1In this embodiment, the cross section of the glue injection part 2 perpendicular to the bottom of the mold body 1 along its own width direction is an arc-shaped cross section, and the bottom wall of the cross section near the mold body 1 is inclined to form a guide surface 3 that points from the bottom wall of the glue injection part 2 to the glue injection edge of the mold body 1.
[0026] The inclined bottom wall forms a guiding surface 3 that precisely guides the molten material towards the injection edge of the mold body 1. This guiding effect allows the material to enter the mold cavity more directly, reducing disordered diffusion and backflow during injection, and improving the directionality and efficiency of material flow. Furthermore, it allows the molten material to adhere more closely to the wall of the injection section 2 as it flows within it, avoiding flow obstruction caused by sharp corners and abrupt changes in shape.
[0027] Reference Figure 1 In this embodiment, the lengths of the glue injection portions 2 on both sides of the mold body 1 are inconsistent.
[0028] Reference Figure 1 In this embodiment, the distances from the ends of the two injection points 2 to both ends of the mold body 1 are not the same. The distance from one end of one injection point 2 to the end closest to the mold body 1 is shorter than the distance from the same end of the other injection point 2 to the same end of the mold body 1, while the distance from its other end to the other end of the mold body 1 is longer than the distance from the other end of the other injection point 2 to the other end of the mold body 1.
[0029] This design incorporates two staggered injection ports 2, each extending one end towards both ends of the mold body 1 along its length. Firstly, the opposing portions of the two injection ports 2 ensure uniform injection of glue into the middle plate, resulting in even material distribution throughout the middle plate during die casting and guaranteeing consistent overall performance. Secondly, the extension of the two injection ports 2 to both ends of the mold body 1 allows for supplementary injection at both ends of the mold body 1. In actual die casting, the uniformity of glue injection on both sides of the mold is fully considered, while both ends of the mold body 1 are adequately filled, significantly reducing product defects caused by uneven glue injection. This improves the uniformity of glue injection during die casting, thereby enhancing the molding quality of the mobile phone middle plate.
[0030] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. A die for die casting a mobile phone middle plate, characterized by: It includes a mold body and two glue inlet sections located on both sides of the mold along its width direction. The two glue inlet sections are connected to the cavity of the mold body, and the glue inlet sections are used to connect to the discharge end of the die casting material conveying structure.
2. The mobile phone middle plate die-casting mold according to claim 1, characterized in that: The glue inlet is elongated and bucket-shaped, with its length direction aligned with the length direction of the mold body. One side of the glue inlet along its width direction is integrally connected to one side of the mold body along its width direction.
3. The die-casting mold for the mobile phone mid-plate according to claim 2, characterized in that: The cross-section of the glue inlet section perpendicular to the bottom of the mold body along its width direction is an arc-shaped cross-section, and the bottom wall of the cross-section near the mold body is inclined to form a guide surface from the bottom wall of the glue inlet section to the glue inlet edge of the mold body.
4. The die-casting mold for the mobile phone mid-plate according to claim 3, characterized in that: The lengths of the glue inlet sections on both sides of the mold body are inconsistent.
5. The die-casting mold for the mobile phone mid-plate according to claim 4, characterized in that: The distances from the ends of the two injection points to both ends of the mold body are not the same. The distance from one end of one injection point to the end closest to the mold body is shorter than the distance from the same end of the other injection point to the same end of the mold body, while the distance from its other end to the other end of the mold body is longer than the distance from the other end of the other injection point to the other end of the mold body.