Manufacturing process of power plug
By first installing pins and adding waterproof glue in the power plug production, and then performing external molding, the problem of poor injection molding of the inner frame is solved, and efficient power plug production is achieved, ensuring the waterproof effect of the product and the quality of the finished product.
Patent Information
- Application Number
- CN202411293556.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2024-12-27
AI Technical Summary
In the existing power plug production process, the injection molding process of the inner frame is prone to defects, resulting in the scrapping of the pins and the inner frame, and it is difficult to meet the requirements of high-precision appearance, affecting production costs and efficiency.
First prepare the bottom shell and cover, install the pins, add waterproof glue and then perform external mold forming to ensure the waterproof effect of the power plug and the high yield of the finished product.
Through this process, the waterproof effect of the power plug is significantly improved, the yield of finished products is high, and the production efficiency is also improved, reducing the generation of defective products.
Smart Images
Figure CN119209153A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of power plug manufacturing technology, in particular to a power plug manufacturing process. Background Art
[0002] The power plug usually includes two or three pins. During production, it is generally firstly injection molded on the inner frame, that is, the pins are injection molded on the inner frame in advance to obtain an integrated inner frame with pins, and then injection molding is performed on the outside of the integrated inner frame to obtain the finished power plug. If there is a defect in the injection molding of the inner frame (for example, the pins are not in the right position, the pins are crooked, the inner frame appearance does not meet the standards, etc.), the pins and the inner frame will be scrapped together; and because the inner frame is usually small in size and roughly in the shape of a horizontal plate, injection molding is performed once on the basis of this semi-finished integrated inner frame with pins, which means that the thickness of the rubber coating is thicker, which is prone to poor molding, resulting in convexity, shrinkage and deformation on the surface of the power plug, etc., causing the entire power plug to be scrapped.
[0003] Based on this, some adopt two-time injection molding to reduce the thickness of the rubber coating of single injection molding. First, an injection molding is performed on the outside of the integrated inner frame with pins, which can be called inner mold, and then a second injection molding is performed on the outside of the inner mold, which can be called outer mold. Compared with the above-mentioned method of only one injection molding, the use of two-time injection molding can reduce the defective rate of injection molding to a certain extent. However, it still has the problem that the inner frame injection molding link produces defects, resulting in the scrapping of the pins and the inner frame together. Moreover, the rubber coating thickness of the inner mold injection is still relatively thick, and there are still defects in the inner mold molding link, which will cause the inner mold, the pins and the inner frame to be scrapped together; because the inner mold must be sufficiently thick, the subsequent outer mold rubber coating thickness can be controlled to be thinner to meet the product appearance yield, which leads to the fact that after the inner mold is molded, its outer surface geometric dimensions are difficult to meet high requirements. As an embedded part covered by the outer mold molding, it is inevitable that it is easy to have a negative impact on the outer mold molding. In this way, it is difficult to meet customer orders with high requirements for the appearance accuracy of the power plug. Moreover, the objective fact of a high defective rate is also a major challenge for the control of production costs and production efficiency.
[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the invention
[0005] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a power plug manufacturing process, wherein the power plug manufactured by the present invention has good waterproof effect and high manufacturing yield.
[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A power plug manufacturing process includes the following steps: Step 1, prepare cables, several pins, a bottom shell, and a cover; wherein several core wires at one end of the cable are connected to several pins to form a cable pin assembly, the bottom shell includes a bottom plate and a peripheral side plate integrally connected to the periphery of the bottom plate, the peripheral side plate and the bottom plate are structured to form a receiving cavity with an open upper end, the peripheral side plate is provided with a wire hole with an open upper end, the bottom plate is provided with several pin installation holes that pass through from top to bottom; the cover is provided with a glue inlet hole that passes through from top to bottom; Step 2: Install the cable pin assembly; assemble the cable pin assembly on the bottom shell, the pins extend into the corresponding pin installation holes and extend out from the bottom of the bottom plate, and one end of the cable is positioned in the wire hole; Step 3: Installing a cover; placing the cover on the top of the containing cavity to enclose the glue containing cavity; Step 4, adding waterproof glue: filling the waterproof glue into the glue cavity from the glue inlet hole until the waterproof glue fills the glue cavity; Step 5: forming an outer mold; injection molding the outer mold to completely cover the outer surfaces of the bottom shell and the cover.
[0007] As a preferred solution, in the step 2, the plug pin is inserted into place.
[0008] As a preferred solution, in the step 2, the plug pins are pre-inserted, and in the step 3, the plug pins are pressed down a second time while the cover is pressed down to assemble, so that the plug pins are inserted into place.
[0009] As a preferred solution, a plurality of slots are provided on the outer peripheral side of the peripheral side plate, and locking protrusions are provided in the slots. A plurality of buckle arms are provided at intervals on the bottom surface of the cover, and buckle holes are provided on the buckle arms. When the cover is assembled on the top of the bottom shell, the buckle arms extend into the corresponding slots, and the locking protrusions are squeezed into the buckle holes to lock the buckle arms.
[0010] As a preferred solution, the inner wall surface of the peripheral side plate is provided with a plurality of positioning grooves, and the bottom surface of the cover is provided with a plurality of positioning blocks at intervals, and when the cover is assembled on the top of the bottom shell, the positioning blocks extend into the corresponding positioning grooves.
[0011] As a preferred embodiment, the hole wall surface of the wire passing hole is further recessed with a first sealing ring half groove, and accordingly, an extension arm extends downward from the bottom surface of the cover, and an adaptation groove is recessed upward at the bottom of the extension arm, and a second sealing ring half groove is further recessed on the groove wall surface of the adaptation groove; a sealing ring is sleeved on the cable; when the cover is assembled on the top of the bottom shell, the extension arm extends downward into the wire passing hole, the adaptation groove matches the wire passing hole, the second sealing ring half groove matches the first sealing ring half groove, and the sealing ring is positioned by the second sealing ring half groove and the first sealing ring half groove.
[0012] As a preferred embodiment, vertical guide grooves are provided on both sides of the extension arm, and vertical guide strips are provided on the inner wall surfaces on two opposite sides of the peripheral side plates corresponding to the wire holes. When the cover is assembled on the top of the bottom shell, the vertical guide grooves correspond to the vertical guide strips, and the vertical guide strips are embedded in the vertical guide grooves, so that the vertical guide grooves are embedded downward along the vertical guide strips.
[0013] As a preferred solution, when the outer mold is formed, the remaining gap of the card slot is filled, so that a plurality of glue-eating joints are formed between the outer mold and the bottom shell.
[0014] As a preferred solution, the bottom shell and the cover are made of hard plastic, and the outer mold is made of soft plastic.
[0015] As a preferred solution, the wall thickness of the outer mold accounts for 4-6% of the outer left-right width of the power plug, and the wall thickness of the peripheral side plate accounts for 9-12% of the outer left-right width of the power plug.
[0016] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it is mainly achieved by first making a bottom shell and a cover, installing the wired pins on the bottom shell, then installing the cover, and then adding waterproof glue toward the accommodating cavity between the bottom shell and the cover, so that the bottom shell, the cover and the cable pin assembly form a waterproof and sealed module. At the same time, the geometric stability of the main structure of the power plug is controlled, and the subsequent re-molding of the outer mold can easily ensure that the thickness of each part of the outer mold remains basically consistent, and negative factors such as surface deformation and shrinkage can be controlled, which is conducive to improving the molding efficiency and yield of the outer mold; and, the early processes of making and assembling the bottom shell and the cover, adding waterproof glue, etc. are feasible and easy to control, with a high yield, and rarely defective products. Therefore, by adopting this manufacturing process, the power plug has a good waterproof effect, a high yield of finished products, and is also conducive to improving production efficiency.
[0017] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a three-dimensional diagram of a power plug according to an embodiment of the present invention; Figure 2 is another perspective view of a power plug according to an embodiment of the present invention; Figure 3 is an exploded view of a power plug according to an embodiment of the present invention; Figure 4 is another exploded view of the power plug of the embodiment of the present invention; Figure 5 1. It is a diagram showing the steps of injection molding the bottom shell of the power plug according to an embodiment of the present invention; Figure 6 It is a diagram showing the steps of installing a cable pin assembly of a power plug according to an embodiment of the present invention; Figure 7 1. It is a diagram showing the steps of installing a cover of a power plug according to an embodiment of the present invention (while showing the bottom structure of the cover); Figure 8 is a three-dimensional diagram of the main structure of the power plug according to an embodiment of the present invention; Fig. 9 is another perspective view of the main structure of the power plug according to the embodiment of the present invention; Fig.10 is a cross-sectional view of the main structure of the power plug according to an embodiment of the present invention; Fig.11 1. It is a diagram showing the manufacturing process steps of the power plug according to the embodiment of the present invention; Fig.12 The figure is a comparison diagram of the sizes of the base shell, cover and outer mold of the power plug according to the embodiment of the present invention.
[0019] Description of the symbols in the accompanying drawings: cable 1, wire end buckle 11, sealing ring 12, pin 2, bottom shell 3, bottom plate 31, peripheral side plate 32, wire hole 33, vertical guide bar 331, accommodating chamber 34, pin mounting hole 35, card slot 36, card protrusion 37, positioning groove 38, first sealing ring half groove 39, step surface 301, profiling recess 302, imitation stop portion 303, cover 4, glue inlet hole 41, process hole 42, card buckle arm 43, buckle hole 44, positioning block 45, extension arm 46, vertical guide groove 461, adaptation groove 47, second sealing ring half groove 48, outer mold 5, extraction operation recess 51, stop portion 52. DETAILED DESCRIPTION
[0020] Please refer to Figures 1 to 12As shown, it shows the specific structure of the embodiment of the present invention. In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.
[0021] A power plug manufacturing process includes the following steps: Step 1, prepare a cable 1, a plurality of pins 2, a bottom shell 3, and a cover 4; wherein, a plurality of core wires at one end of the cable 1 are connected to a plurality of pins 2 to form a cable 1 pin 2 assembly, for example, by riveting to form an electrical connection, the bottom shell 3 is an injection molded part, which is formed by mold injection, the bottom shell 3 includes a bottom plate 31 and a peripheral side plate 32 integrally connected to the entire periphery of the bottom plate 31, the peripheral side plate 32 and the bottom plate 31 surround a receiving cavity 34 with an open upper end, and the peripheral side plate 32 is provided with an upper end The bottom plate 31 is provided with a plurality of pin mounting holes 35 extending vertically therethrough, and the cover 4 is also an injection-molded part, which is formed by injection molding of a mold, and is usually shaped like the upper end of the accommodating cavity 34 and slightly larger in size. The cover 4 is provided with a glue inlet hole 41 extending vertically therethrough. The bottom shell 3 and the cover 4 can be made of PA66 plastic or other plastics. PA66 plastic has a high melting point and is a semi-crystalline-crystalline material. PA66 plastic can maintain strong strength and rigidity even at higher temperatures.
[0022] Step 2, install the cable 1 and the pin 2 assembly; assemble the cable 1 and the pin 2 assembly on the bottom shell 3, the pin 2 extends into the corresponding pin installation hole 35 and extends out from the bottom of the bottom plate 31, one end of the cable 1 is positioned in the wire hole 33, and the other end is located outside the bottom shell 3; Step 3: Install the cover 4; cover the cover 4 on the top of the accommodating cavity 34 to form a relatively closed glue accommodating cavity; Step 4, add waterproof glue; fill the waterproof glue into the glue cavity at the glue inlet hole 41 until the waterproof glue fills the glue cavity; wait for the waterproof glue to solidify; the filling of the waterproof glue, in addition to the waterproof sealing effect, also plays the role of solidifying the pin 2 and the connection part of the pin 2, so that the connection between the components is stable and will not loosen, and the waterproof glue is filled in the bottom shell 3 and the cover 4, which plays a role in dimensioning the assembly formed by the bottom shell 3 and the cover 4, which is beneficial to the geometric stability of the appearance of the assembly. Because the geometric stability of the appearance of the assembly is also related to the molding efficiency and yield of the outer mold. At this stage, the main structure of the power plug is obtained, and its appearance and size are relatively close to the finished product.
[0023] Step five, forming the outer mold 5; the outer mold 5 is injection molded to completely cover the outer surfaces of the bottom shell 3 and the cover 4, and a small section of the portion of the cable 1 close to the peripheral side plate 32 is covered as a wire tail buckle 11. The outer mold 5 is made of TPV soft rubber. Usually, the bottom shell 3 and the cover 4 have formed a semi-finished product of a relatively large size and basically imitate the shape of the finished product. When the outer mold 5 is injection molded, the thickness of each part of the outer mold 5 can be kept basically consistent, and negative factors such as surface deformation and shrinkage can be alleviated and controlled, further improving the molding efficiency and yield of the outer mold 5. At this point, the power plug obtained has a good waterproof effect, is easy to automate, and has a high yield of finished products. In this embodiment, the bottom shell 3, the cover 4, and the outer mold 5 are all triangular structures.
[0024] In one case, the step 2 is to insert the pin 2 into place. During the insertion, the pin 2 can be manually placed into the corresponding pin installation hole 35, and then the top of the pin 2 is pressed down by a semi-automatic machine or a fully automatic machine. Of course, in some cases, the top of the pin 2 can also be pressed down by a tool or a finger-assisted jig.
[0025] In another case, in step 2, the plug pin 2 is pre-inserted, and the pre-insertion becomes simpler, and in step 3, the plug pin 2 is pressed down for a second time while the cover 4 is pressed down to assemble, so that the plug pin 2 is inserted into place. It cleverly utilizes a process of installing the cover 4 to achieve multiple functions of installing the cover and pressing the plug pin 2 (or refers to the step of strengthening the insertion of the pin 2). In specific implementation, for example, a process hole 42 is provided on the cover 4 corresponding to each pin 2, and there are three pins 2 in total in this embodiment, arranged in a triangle, so there are also three process holes 42 arranged in a triangle, and three ejectors of the manipulator or auxiliary fixture extend into the three process holes 42, and when the cover 4 is grabbed and assembled on the bottom shell 3, the three ejectors also extend into the accommodating cavity 34 and abut against the top of the corresponding pin 2 (in this embodiment, the pin 2 is cylindrical, and a concave hole is reserved at the top of the pin 2), so when the cover 4 is pressed down, the three ejectors also press down the pin 2 synchronously, playing the role of pressing the pin 2. Limiting steps are provided on the three ejectors, and the limiting steps are used to form a limit with the top surface of the cover 4, which plays the role of controlling the downward extension depth of the ejectors relative to the cover 4. The ejectors can be rigid or elastic movable ejectors.
[0026] A plurality of card slots 36 are provided on the outer peripheral side of the peripheral side plate 32 of the bottom shell 3. The card slots 36 pass through the top of the peripheral side plate 32 but do not pass through the inner wall surface of the peripheral side plate 32 to avoid affecting the airtightness of the peripheral side plate 32 due to the setting of the card slots 36. A card protrusion 37 is provided in the card slot 36. Usually, the card protrusion 37 has an inclined surface that gradually decreases from top to bottom, so that the entire card protrusion 37 is in the shape of an oblique cone with a small top and a large bottom, which is convenient for the cover 4 to be assembled and buckled and positioned from top to bottom. The latching protrusion 37 is hidden in the latching groove 36 and does not protrude from the outer wall of the peripheral side plate 32. A plurality of latching arms 43 are arranged at circumferential intervals on the bottom surface of the cover 4 near the peripheral edge. The latching arms 43 are provided with buckle holes 44 that horizontally penetrate the latching arms 43. When the cover 4 is assembled on the top of the bottom shell 3 from top to bottom, the latching arms 43 extend into the corresponding latching groove 36, and the latching protrusion 37 squeezes into the buckle hole 44 to lock the latching arms 43. The inner wall surface of the peripheral side plate 32 is provided with a plurality of positioning grooves 38, and the positioning grooves 38 pass through the top of the peripheral side plate 32 upwardly, and the positioning grooves 38 do not pass through the outer wall surface of the peripheral side plate 32, so as to avoid affecting the airtightness of the peripheral side plate 32 due to the setting of the positioning grooves 38. The bottom surface of the cover 4 is provided with a plurality of positioning blocks 45 at intervals, and when the cover 4 is assembled from top to bottom on the top of the bottom shell 3, the positioning blocks 45 extend into the corresponding positioning grooves 38. The hole wall surface of the wire hole 33 is further recessed with a first sealing ring half groove 39, and accordingly, an extension arm 46 extends downward from the bottom surface of the cover 4, and an adapting groove 47 is recessed upward from the bottom of the extension arm 46, and a second sealing ring half groove 48 is further recessed on the groove wall surface of the adapting groove 47; a sealing ring 12 is sleeved on the cable 1; when the cover 4 is assembled from top to bottom on the top of the bottom shell 3, the extension arm 46 extends downward into the wire hole 33, the adapting groove 47 matches and fits with the wire hole 33, and the second sealing ring half groove 48 is recessed on the wall surface of the adapting groove 47; 8 matches and fits with the first sealing ring half groove 39 to form a circular ring shape, and the sealing ring is positioned by the second sealing ring half groove 48 and the first sealing ring half groove 39, that is, the lower half of the sealing ring is located in the first sealing ring half groove 39, and the upper half of the sealing ring is located in the second sealing ring half groove 48, and the second sealing ring half groove 48 and the first sealing ring half groove 39 squeeze the sealing ring 12, so that the sealing ring 12 forms a sealing positioning between the peripheral side plate 32, the cover 4 and the cable 1.Vertical guide grooves 461 are provided on both sides of the extension arm 46, and vertical guide bars 331 are provided on the inner wall surfaces on the two opposite sides of the peripheral side plate 32 corresponding to the wire passing hole 33. When the cover 4 is assembled on the top of the bottom shell 3 from top to bottom, the vertical guide grooves 461 correspond to the vertical guide bars 331, and the vertical guide bars 331 are embedded in the vertical guide grooves 461, so that the vertical guide grooves 461 are embedded downward along the vertical guide bars 331 until the lower end of the extension arm 46 rests on the step surface 301 of the bottom shell 3.
[0027] The glue inlet hole 41 is set in the area surrounded by the three process holes 42. Usually, after the waterproof glue is applied and cured, the waterproof glue of the glue inlet hole 41 and the three process holes 42 will not protrude from the surface of the cover 4, but will be slightly lower than the surface of the cover 4. In addition, when the outer mold 5 is formed, the gap of the card slot 36 is filled, and the concave part of the waterproof glue top of the glue inlet hole 41 and the three process holes 42 is also filled, so that multiple glue-eating joints are formed between the outer mold 5 and the bottom shell 3 and the cover 4. Usually, the three card slots 36 are evenly or roughly evenly arranged on the outer periphery of the peripheral side plate 32, so that the combination of the outer mold 5 and the bottom shell 3 is more balanced. Usually, the bottom shell 3 and the cover 4 are hard plastic, which can be the same material or different materials. The hard plastic is selected to ensure that the geometric dimensions of the main structure are stable, the controllability is good, and the dimensional accuracy is relatively ideal, and the outer mold 5 is preferably soft glue. It mainly plays a role in the appearance coating, and plays a role in the appearance, the touch feel of use, and further waterproofing. Due to the ingenious structural design, the wall thickness of the bottom shell 3, the cover 4, and the outer mold 5 does not need to be too thick to avoid shrinkage and deformation caused by too thick. For example, the wall thickness of the outer mold 5 accounts for 4-6% of the outer left and right width of the power plug, and the wall thickness of the peripheral side plate 32 accounts for 9-12% of the outer left and right width of the power plug. Since the bottom shell 3 and the cover 4 are first injection molded, and then the connected pins 2 are installed into the bottom shell 3, the wiring, the bottom shell 3, and the cover 4 can be made in parallel without waiting, and the cable 1, several pins 2, the bottom shell 3, and the cover 4 can all be guaranteed to be good products; while in the traditional technology, if the pins 2 are injection molded on the inner frame in advance, if the injection molding process of the inner frame is defective, the pins 2 and the inner frame will be scrapped together. In the present invention, after the cover 4 is installed, the semi-finished products at this stage are easy to control the yield, and are basically good products, with few defective products. The bottom shell 3 and the cover 4 are formed separately. The bottom shell 3 is a hollow cavity, which means that the wall thickness of the bottom shell 3 and the cover 4 will not be too thick, and can be controlled to a suitable thickness. It is easy to take into account the strength requirements and the molding yield requirements. There will be no defects such as surface depression and obvious shrinkage caused by the injection molding wall being too thick. The shape determined by the assembly of the cover 4 and the bottom shell 3 has stable geometric dimensions. Based on the semi-finished product at this stage, the outer mold 5 is formed. The thickness of the outer mold 5 does not need to be too thick, and it can meet the requirements of stable coating. It is easy to ensure that the thickness of each part of the outer mold 5 remains basically consistent, and negative factors such as surface deformation and shrinkage can be controlled, which is conducive to improving the molding efficiency and yield of the outer mold 5. Therefore, by adopting this manufacturing process, the power plug has a good waterproof effect and a high finished product yield.
[0028] Furthermore, a pull-out operation recess 51 is provided at the left and right areas of the front end of the outer mold 5. The pull-out operation recess 51 is located at the lower section, and correspondingly, a stopper 52 is formed at the upper section. When the power plug needs to be pulled out, two fingers are located in the pull-out operation recess 51 on the left and right sides, respectively, and force is applied to the corresponding stopper 52. The power plug can be easily pulled out by pulling upward, which reduces the difficulty of operation. Since the outer mold 5 is designed with equal wall thickness or substantially equal wall thickness, a contour recess 302 is provided at the lower section of the peripheral side plate 32 of the bottom shell 3, and a pseudo stopper 303 is provided at the upper section of the peripheral side plate 32. The stopper 52 is covered on the outer surface of the pseudo stopper 303.
[0029] The design focus of the present invention is that it is mainly through first making the bottom shell 3 and the cover 4, installing the wired pins 2 on the bottom shell 3, then installing the cover 4, and then adding waterproof glue toward the accommodating cavity 34 between the bottom shell 3 and the cover 4, so that the bottom shell 3, the cover 4 and the cable 1 pin 2 assembly form a waterproof and sealed module, and at the same time, the geometric stability of the main structure of the power plug is controlled, and the subsequent molding of the outer mold 5 is easy to ensure that the thickness of each part of the outer mold 5 remains basically consistent, and negative factors such as surface deformation and shrinkage can be controlled, which is conducive to improving the molding efficiency and yield of the outer mold 5; and, the early processes of making and assembling the bottom shell 3 and the cover 4, adding waterproof glue, etc., are feasible and easy to control, with a high yield, and rarely defective products. Therefore, by adopting this manufacturing process, the power plug has a good waterproof effect, a high yield of finished products, and is also conducive to improving production efficiency.
[0030] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A process for manufacturing a power plug, characterized in that: The steps include: Step 1, prepare cables, several pins, a bottom shell, and a cover; wherein several core wires at one end of the cable are connected to several pins to form a cable pin assembly, the bottom shell includes a bottom plate and a peripheral side plate integrally connected to the periphery of the bottom plate, the peripheral side plate and the bottom plate are structured to form a receiving cavity with an open upper end, the peripheral side plate is provided with a wire hole with an open upper end, the bottom plate is provided with several pin installation holes that pass through from top to bottom; the cover is provided with a glue inlet hole that passes through from top to bottom; Step 2: Install the cable pin assembly; assemble the cable pin assembly on the bottom shell, the pins extend into the corresponding pin installation holes and extend out from the bottom of the bottom plate, and one end of the cable is positioned in the wire hole; Step 3: Installing a cover; placing the cover on the top of the containing cavity to enclose the glue containing cavity; Step 4, adding waterproof glue: filling the waterproof glue into the glue cavity from the glue inlet hole until the waterproof glue fills the glue cavity; Step 5: forming an outer mold; injection molding the outer mold to completely cover the outer surfaces of the bottom shell and the cover.
2. A power plug manufacturing process according to claim 1, characterized in that: The second step is to insert the pin into place.
3. A power plug manufacturing process according to claim 1, characterized in that: In the step 2, the plug pins are pre-inserted, and in the step 3, the plug pins are pressed down a second time while the cover is pressed down to assemble, so that the plug pins are inserted into place.
4. A power plug manufacturing process according to claim 1, characterized in that: A plurality of slots are arranged on the outer peripheral side of the peripheral side plate, and a locking protrusion is arranged in the slot. A plurality of buckle arms are arranged at intervals on the bottom surface of the cover, and buckle holes are arranged on the buckle arms. When the cover is assembled on the top of the bottom shell, the buckle arms extend into the corresponding slots, and the locking protrusions are squeezed into the buckle holes to lock the buckle arms.
5. A process for manufacturing a power plug according to claim 1 or 4, characterized in that: The inner wall surface of the peripheral side plate is provided with a plurality of positioning grooves, and the bottom surface of the cover is provided with a plurality of positioning blocks at intervals. When the cover is assembled on the top of the bottom shell, the positioning blocks extend into the corresponding positioning grooves.
6. A process for manufacturing a power plug according to claim 1, characterized in that: The hole wall surface of the wire passing hole is further recessed with a first sealing ring half groove, and accordingly, an extension arm extends downward from the bottom surface of the cover, and an adapting groove is recessed upward from the bottom of the extension arm, and a second sealing ring half groove is further recessed on the groove wall surface of the adapting groove; a sealing ring is sleeved on the cable; when the cover is assembled on the top of the bottom shell, the extension arm extends downward into the wire passing hole, the adapting groove matches the wire passing hole, the second sealing ring half groove matches the first sealing ring half groove, and the sealing ring is positioned by the second sealing ring half groove and the first sealing ring half groove.
7. A process for manufacturing a power plug according to claim 6, characterized in that: Vertical guide grooves are provided on both sides of the extension arm, and vertical guide bars are provided on the inner wall surfaces on two opposite sides of the peripheral side plates corresponding to the wire passing holes. When the cover is assembled on the top of the bottom shell, the vertical guide grooves correspond to the vertical guide bars, and the vertical guide bars are embedded in the vertical guide grooves, so that the vertical guide grooves are embedded downward along the vertical guide bars.
8. A process for manufacturing a power plug according to claim 4, characterized in that: When the outer mold is formed, the gap of the card slot is filled, so that a plurality of glue-eating joints are formed between the outer mold and the bottom shell.
9. A process for manufacturing a power plug according to claim 1, characterized in that: The bottom shell and the cover are made of hard plastic, and the outer mold is made of soft plastic.
10. A process for manufacturing a power plug according to claim 1 or 9, characterized in that: The wall thickness of the outer mold accounts for 4-6% of the outer left-right width of the power plug, and the wall thickness of the peripheral side plate accounts for 9-12% of the outer left-right width of the power plug.