A concealed ejector pin structure of a new energy vehicle charging port cover seat plate mold
Patent Information
- Application Number
- CN202521904360.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-04
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-09-04
AI Technical Summary
[0003]在注塑成型工艺中，顶针作为模具中用于将成型后的塑件从型腔中顶出的关键部件，其设置位置及结构往往会在塑件表面留下顶针印，对于新能源汽车充电口盖座板这类对外观质量要求较高的部件，顶针印的存在会直接影响产品的美观度，尤其在硬胶部分与软胶部分的搭接区域，顶针结构更容易因顶针退出而留下明显痕迹，破坏产品表面的完整性与协调性
[0013]1、本装置通过将顶针设置在硬胶部分与软胶部分的搭接边缘，利用软胶部分的填充角精准覆盖硬胶部分的顶针缺口，避免了顶针结构在产品表面留下明显顶针印的问题，确保充电口盖座板外观面的完整性与平滑性，进而可以满足新能源汽车对零部件外观的高标准要求。
Smart Images
Figure CN224781188U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold development technology for new energy vehicles, and in particular to a concealed ejector pin structure for a charging port cover plate mold for new energy vehicles. Background Technology
[0002] In the field of injection mold development for charging port cover plates for new energy vehicles, the charging port cover plate is an important part of the vehicle's appearance and function. Its structure usually adopts a combination of hard and soft rubber to balance structural strength and performance.
[0003] In injection molding, ejector pins are key components in the mold used to eject the molded plastic parts from the cavity. Their placement and structure often leave ejector pin marks on the surface of the plastic parts. For components such as charging port covers for new energy vehicles, which have high requirements for appearance quality, the presence of ejector pin marks will directly affect the aesthetics of the product. Especially in the overlapping area between hard plastic parts and soft plastic parts, the ejector pin structure is more likely to leave obvious marks due to the ejector pin withdrawal, which will damage the integrity and harmony of the product surface.
[0004] In addition, to eliminate ejector pin marks, traditional processes often require additional post-processing steps such as grinding and spraying. This not only increases production costs, but may also affect the structural strength of the product or the tightness of the bond between hard and soft plastic due to improper handling. It is difficult to meet the high standards of new energy vehicles for the appearance and performance of parts. Therefore, a concealed ejector pin structure is needed for the mold of the charging port cover plate of new energy vehicles. Utility Model Content
[0005] The main purpose of this utility model is to provide a concealed ejector pin structure for a new energy vehicle charging port cover plate mold, which can effectively solve the problems mentioned above.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A concealed ejector pin structure for a new energy vehicle charging port cover plate mold includes a hard plastic part, an installation port on the hard plastic part, four ejector pin notches on the installation port, a soft plastic part installed inside the installation port, and four filling corners inside the soft plastic part corresponding to the ejector pin notches.
[0008] Preferably, the ejector pin is positioned at the edge where the hard rubber portion and the soft rubber portion overlap, the ejector pin penetrates into the hard rubber portion to form an ejector pin notch, and the filler corner covers the ejector pin notch to hide the ejector pin imprint.
[0009] Preferably, the depth to which the ejector pin penetrates the hard plastic portion is 7 mm.
[0010] Preferably, the filling corner is rounded.
[0011] Preferably, the hard rubber portion is injection molded using a concealed ejector pin structure, and the soft rubber portion is overmolded to cover the ejector pin notch.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] 1. This device sets the ejector pin at the overlapping edge of the hard and soft rubber parts, and uses the filling angle of the soft rubber part to accurately cover the ejector pin notch of the hard rubber part. This avoids the problem of the ejector pin structure leaving obvious ejector pin marks on the product surface, ensuring the integrity and smoothness of the appearance of the charging port cover plate, and thus meeting the high standard requirements of new energy vehicles for the appearance of parts.
[0014] 2. This device can directly cover the ejector pin notch with the filling corner to hide the ejector pin mark, eliminating the need for additional post-processing steps such as grinding and spraying. This reduces production steps, shortens the production cycle, and also reduces the material and labor costs that may be incurred due to subsequent processing.
[0015] 3. The ejector pin of this device is set to penetrate the hard plastic part to a depth of 0.7mm. This ensures that the hard plastic part can be easily demolded after injection molding, and avoids damage to the structural strength of the hard plastic part due to excessive ejector pin penetration. At the same time, the soft plastic part is tightly bonded to the hard plastic part through a rubber coating process. The matching design of the filling corner and the ejector pin notch further enhances the tightness of the connection between the hard plastic and the soft plastic, ensuring the stability of the overall structure. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention with the soft adhesive removed.
[0018] Figure 3 This is a schematic diagram of the soft rubber part of this utility model;
[0019] Figure 4 For the present utility model Figure 1 Enlarged view of point A in the middle;
[0020] Figure 5 For the present utility model Figure 2 Enlarged diagram of point B in the middle.
[0021] In the diagram: 1. Hard plastic part; 2. Mounting port; 3. Soft plastic part; 4. Filler corner; 5. Ejector pin notch. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0023] like Figure 1 - Figure 5 As shown, a concealed ejector pin structure for a new energy vehicle charging port cover plate mold includes a hard plastic part 1, an installation port 2 on the hard plastic part 1, four ejector pin notches 5 on the installation port 2, a soft plastic part 3 installed inside the installation port 2, and four filling corners 4 corresponding to the ejector pin notches 5 inside the soft plastic part 3.
[0024] Furthermore, the ejector pin is positioned at the edge where the hard plastic part 1 and the soft plastic part 3 overlap. The ejector pin penetrates into the hard plastic part 1 to form an ejector pin notch 5, and the filler corner 4 covers the ejector pin notch 5 to hide the ejector pin imprint.
[0025] Furthermore, the ejector pin penetrates 0.7 mm into the hard plastic part 1;
[0026] Furthermore, fill corner 4 is rounded.
[0027] Furthermore, the hard plastic part 1 adopts a concealed ejector pin structure during injection molding, and the soft plastic part 3 covers the ejector pin notch 5 during overmolding.
[0028] In the above, the hard plastic part 1 is injection molded from PP+GF30 (polypropylene + 30% glass fiber) material and serves as the main structure of the charging port cover plate. The mounting port 2 in the middle of the hard plastic part 1 and the groove structure that matches the soft plastic part 3 are used to accommodate and fix the soft plastic part 3.
[0029] In the above, the ejector pin notch 5 is located at the edge of the mounting port 2 (i.e., the overlapping area between the hard plastic part 1 and the soft plastic part 3). The four ejector pin notches 5 are evenly opened and formed by the ejector pin penetrating into the hard plastic during the hard plastic injection stage. The depth of the ejector pin penetrating into the hard plastic part 1 is 0.7mm, ensuring that the notch does not affect the structural strength of the hard plastic part 1, and provides sufficient space for the soft plastic to fill.
[0030] In the above, the soft rubber part 3 is made of TPE (thermoplastic elastomer) material and is molded by overmolding process. It is installed in the mounting port 2 of the hard rubber part 1 and is tightly fitted with the hard rubber part 1 to form an integral structure. The soft rubber part 3 has four filling corners 4 on the side facing the ejector pin notch 5. The filling corners 4 correspond one-to-one with the ejector pin notch 5. Their shapes match the notches, and the overall design is a beautiful circular shape, which not only achieves complete coverage of the notches, but also improves the coordination of the product appearance.
[0031] The concealed ejector pin structure of this utility model is achieved through a two-color injection molding process, the specific steps of which are as follows:
[0032] Hard plastic injection molding stage:
[0033] After the PP+GF30 material is heated and melted, it is injected into the cavity of the hard plastic mold. The ejector pins in the mold are set in the preset position (i.e., the edge of the mounting port 2, the overlap of the hard plastic and the soft plastic). During the injection process, the ejector pins penetrate 0.7mm into the hard plastic material. After the hard plastic material cools and solidifies, the ejector pins are withdrawn. At this time, four ejector pin notches 5 with a depth of 0.7mm will be formed on the edge of the mounting port 2 of the hard plastic part 1. Finally, the molded hard plastic part 1 is taken out to complete the hard plastic stage processing.
[0034] Soft rubber overlay stage:
[0035] The molded hard plastic part 1 is positioned and placed into the cavity of the soft plastic mold, ensuring that the mounting port 2 and ejector pin notch 5 of the hard plastic part 1 are within the filling range of the soft plastic material. After the TPE material is heated and melted, it is injected into the cavity of the soft plastic mold, so that the soft plastic material fills the mounting port 2 and tightly bonds with the edge of the hard plastic part 1. During the filling process, the four filling corners 4 of the soft plastic material are embedded into the four ejector pin notches 5 of the hard plastic part 1, completely covering the notches and forming a smooth surface without exposed ejector pin marks. After the soft plastic material cools and solidifies, the mold is opened and the product is taken out, thus obtaining a new energy vehicle charging port cover plate with a concealed ejector pin structure.
[0036] Through the above structural design and process steps, the ejector pin notch 5 is completely covered by the filling angle 4 of the soft rubber part 3, and there is no ejector pin mark residue on the product surface. This solves the problem of the traditional ejector pin structure affecting the appearance. At the same time, no additional grinding, spraying and other post-processing processes are required, which reduces production costs. The design of the round filling angle 4 makes the product appearance more harmonious and meets the appearance requirements of high-end new energy vehicles.
[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A concealed ejector pin structure for a new energy vehicle charging port cover plate mold, comprising a hard plastic part (1), characterized in that: The hard plastic part (1) is provided with an installation port (2), and the installation port (2) is provided with four ejector pin notches (5). The soft plastic part (3) is installed in the installation port (2), and the soft plastic part (3) is provided with four filling corners (4) corresponding to the ejector pin notches (5).
2. The concealed ejector pin structure of a new energy vehicle charging port cover plate mold according to claim 1, characterized in that: The ejector pin is positioned at the edge where the hard rubber part (1) and the soft rubber part (3) overlap. The ejector pin penetrates into the hard rubber part (1) to form an ejector pin notch (5). The filler corner (4) covers the ejector pin notch (5) to hide the ejector pin mark.
3. The concealed ejector pin structure of a new energy vehicle charging port cover plate mold according to claim 2, characterized in that: The depth to which the ejector pin penetrates the hard plastic part (1) is 0.7 mm.
4. The concealed ejector pin structure of a new energy vehicle charging port cover plate mold according to claim 1, characterized in that: The filling angle (4) is circular.
5. The concealed ejector pin structure of a new energy vehicle charging port cover plate mold according to claim 1, characterized in that: The hard plastic part (1) adopts a concealed ejector pin structure during injection molding, and the soft plastic part (3) covers the ejector pin notch (5) during encapsulation.