Universal plug injection mold

Abstract

The application discloses a universal plug injection mold, comprising: a bottom plate, a plurality of positioning grooves of polygonal structure are formed in the bottom plate, a mold core capable of rotating to a predetermined direction on the positioning grooves is arranged on the positioning grooves and the bottom of the mold core is matched with the shape of the positioning grooves, a plug panel is used for fixing, a top plate is arranged on the mold core and is connected with the bottom plate, a plug rear cover injection groove is formed in the position corresponding to the mold core, and a plastic injection device is used for injecting the plastic to form a plug rear shell which is integrally connected with the plug panel rotating to the predetermined direction. Through cooperation of the rotatable mold core and the polygonal positioning groove, the same mold can produce plug rear covers of different angles (such as 0 DEG, 90 DEG, 180 DEG and the like), the number of molds required by manufacturers for adapting to the differences of global socket positions is greatly reduced, mold development costs (material, processing and maintenance fees) are directly reduced, meanwhile, production management processes are simplified and product market cycle is shortened.

Description

Technical Field

[0001] This utility model belongs to the field of socket manufacturing technology, and in particular relates to a universal plug injection mold. Background Technology

[0002] A plug typically consists of a faceplate and a back cover, with its core functional component being the electrode pins (prongs) on the faceplate. Taking a three-phase plug as an example, it requires three independent pins connected by a power cord. Due to global variations in socket orientation (e.g., 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°, 360° rotation layouts), manufacturers need to develop multiple plug variations with different pin layouts to meet compatibility requirements. However, each layout requires a custom injection mold, significantly increasing mold development costs (including mold steel materials, CNC precision machining, EDM machining, and subsequent maintenance). This "one layout, one mold" model not only drives up production costs and compresses profit margins but also increases supply chain complexity due to multi-model management, ultimately affecting consumers through lower retail prices and weakening product market competitiveness. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] To overcome the above shortcomings, the purpose of this utility model is to provide a universal plug injection mold to solve the technical problem that manufacturers need to develop multiple independent injection molds to adapt to the different orientations of sockets around the world, which leads to a surge in mold costs (materials / processing / maintenance).

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] A universal plug injection mold includes: a base plate with symmetrical and polygonal positioning grooves; a mold core that is mounted on the positioning grooves and whose bottom is adapted to the shape of the positioning grooves and can rotate to a predetermined direction on the positioning grooves for fixing the plug panel; a top plate that is mounted on the mold cores and connected to the base plate; and a plug rear cover injection groove corresponding to the position of the mold cores for injection molding equipment to inject plastic to form a plug rear cover integrally connected with the plug panel rotated to the predetermined direction.

[0008] By using a rotatable mold core in conjunction with a symmetrical and polygonal positioning groove, the same mold can produce plug back covers with different angles (such as 0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°, 360°, etc.), which greatly reduces the number of molds required by manufacturers to adapt to the differences in global socket orientation, directly reducing mold development costs (materials, processing, maintenance costs), while simplifying production management processes and shortening product launch cycles.

[0009] In some embodiments, the upper surface of the mold core is formed with a socket for the insertion of pins from the plug panel.

[0010] The insertion hole of the pin can achieve positioning, eliminate the risk of panel displacement during injection molding, ensure the geometric accuracy of the pin relative to the back cover, significantly improve product yield, and avoid electrical contact problems caused by pin misalignment.

[0011] In some embodiments, the plug panel is provided with a power cord for connecting pins, and the injection molding groove has an opening near the edge to form a clearance for the power cord to be led out.

[0012] The design of the clearance opening solves the industry problem of the power cord being wrapped in plastic during the injection molding process, ensuring the complete sealing of the joint between the back cover and the panel.

[0013] In some embodiments, the positioning groove is an octagonal structure.

[0014] The octagonal positioning groove can accommodate as many different adjustment angles as possible while ensuring the rotational stability of the mold core.

[0015] In some embodiments, the mold core includes a positioning part located at the bottom and having an octagonal structure, a shaping part integrally connected to the positioning part and having a larger size than the positioning part, and the bottom edge of the shaping part abutting against the upper surface of the base plate.

[0016] The bottom of the mold core is matched with the positioning groove to achieve precise positioning, and the flat contact between the molding part and the base plate can disperse the injection pressure and extend the service life of the mold core. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the universal plug injection mold of this utility model;

[0018] Figure 2 This is an exploded view of the universal plug injection mold of this utility model;

[0019] Figure 3 This is a cross-sectional view of the universal plug injection mold of this utility model;

[0020] Figure 4 This is a diagram showing the mold core of the universal plug injection mold of this utility model installed on the base plate;

[0021] Figure 5 This is a diagram showing the state of part of the mold core of the universal plug injection mold of this utility model after it has been removed from the base plate;

[0022] Figure 6 This is a schematic diagram of the top plate in the universal plug injection mold of this utility model;

[0023] Figure 7 This is a first-view structural schematic diagram of the mold core in the universal plug injection mold of this utility model;

[0024] Figure 8 This is a structural schematic diagram of the mold core in the universal plug injection mold of this utility model from a second perspective;

[0025] Figure 9 This is a schematic diagram of the first embodiment of the plug produced by the universal plug injection mold of this utility model;

[0026] Figure 10 This is a schematic diagram of the second embodiment of the plug produced by the universal plug injection mold of this utility model.

[0027] Figure label:

[0028] 1. Base plate; 101. Positioning groove; 2. Mold core; 201. Positioning part; 202. Shaping part; 2021. Insertion hole; 3. Top plate; 301. Injection groove; 302. Clearance opening; 4. Plug; 401. Plug faceplate; 402. Plug back cover; 403. Pin. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0030] This utility model provides a universal plug injection mold, mainly composed of three parts: a base plate 1, a mold core 2, and a top plate 3. The base plate 1 is made of metal (preferably stainless steel or tool steel), on which symmetrical, polygonal positioning grooves 101 are machined. The bottom shape of the mold core 2 perfectly matches the positioning grooves 101, allowing it to be freely rotated to predetermined angles such as 0°, 90°, 180°, or 270°. The upper surface of the mold core 2 is used to fix the plug faceplate 401. The top plate 3 is connected to the base plate 1 by four corner bolts, and an injection groove 301 is opened in the area corresponding to the mold core 2, which connects to the injection molding machine's feed port. During operation, the mold core 2 is rotated to the target angle, fixing the plug faceplate 401 to the mold core 2. After mold closing, molten plastic is filled and molded through the injection groove 301, ultimately forming a plug back shell 402 integrally connected to the plug faceplate 401, thus forming the plug 4. Figure 9 and 10 As shown.

[0031] Specifically, a socket 2021 is provided on the upper surface of the mold core 2 for the insertion of the pin 403. In this way, the plug panel 401 will not shift under the high pressure of injection molding (60-80MPa).

[0032] Based on the aforementioned structure, an avoidance opening 302 that penetrates the edge of the injection molding groove 301 is provided at the edge of the injection molding groove 301.

[0033] Specifically, the processing procedure is as follows: The pins 403 of the plug panel 401 with pins 403 are inserted into the socket 2021. The power cord can be pre-connected to the pins 403 or soldered on-site. The power cord is led out from the clearance opening 302, which secures the power cord. Finally, plastic is injected into the injection molding tank 301 using an injection molding machine and pressed to form a back cover that conforms to the shape of the injection molding tank 301. At this point, the back cover covers the edge and rear side of the plug panel 401. It is worth noting that if a small amount of plastic overflows from the clearance opening 302 after injection molding, it needs to be trimmed later.

[0034] Preferably, the positioning groove 101 is an octagonal structure with diagonal lengths of 50mm and 30mm (tolerance ±0.1mm). The octagonal angles are designed to be 60° and 120°, allowing the mold core 2 to be rotated and adjusted at multiple angles. Alternatively, a square positioning groove 101 (limited to 0°, 90°, and 180° directions) can be used, but the octagonal structure offers better rotational compatibility.

[0035] Furthermore, the bottom of the mold core 2 is an octagonal positioning part 201 (height 10mm), whose size is in clearance fit with the positioning groove 101 (single-sided clearance ≤0.05mm); the top is a larger shaping part 202 (size 40mm), which abuts against the upper surface of the base plate 1.

[0036] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A universal plug injection mold, characterized in that, include: A base plate (1) is provided with a symmetrical and polygonal positioning groove (101). A mold core (2) is provided on the positioning groove (101) and its bottom is adapted to the shape of the positioning groove (101). It can rotate to a predetermined direction on the positioning groove (101) for fixing the plug panel. A top plate (3) is provided on the mold core (2) and connected to the base plate (1). A plug rear cover injection groove (301) is provided at the position corresponding to the mold core (2) for the injection molding equipment to inject plastic to form a plug rear shell (402) integrally connected with the plug panel rotated to the predetermined direction.

2. The universal plug injection mold according to claim 1, characterized in that, The upper surface of the mold core (2) forms a socket (2021) for the insertion of the pin (403) on the plug panel.

3. The universal plug injection mold according to claim 2, characterized in that, The plug panel is provided with a power cord for connecting the pin (403), and the injection molding groove (301) near the edge forms a clearance opening (302) for the power cord to be led out.

4. The universal plug injection mold according to claim 1, characterized in that, The positioning groove (101) has an octagonal structure.

5. The universal plug injection mold according to claim 4, characterized in that, The mold core (2) includes a positioning part (201) located at the bottom and having an octagonal structure, and a shaping part (202) integrally connected to the positioning part (201) and having a larger size than the positioning part (201). The bottom edge of the shaping part (202) abuts against the upper surface of the base plate (1).

Images