Ear hook liquid silica gel injection mold for plastic-coated rubber piece and wire rod end

Abstract

The utility model discloses an ear-hook liquid silica gel injection mold for a plastic-coated rubber piece and a wire rod end. Comprising an upper mold plate and a lower mold plate, the lower mold plate is provided with an injection molding station used for injection molding of the ear hanging part, the injection molding station comprises a first mold core, a second mold core, an ejector pin and two injection molding grooves, the two injection molding grooves are formed in the upper mold plate and the lower mold plate respectively, and movable grooves corresponding to the first mold core and the second mold core in number are formed in the end, located in the injection molding grooves, of the lower mold plate; and extension feet are arranged at the side ends of the first mold core and the second mold core. According to the utility model, the first mold core and the second mold core are directly sleeved with the hardware plug, one end of the electric wire is arranged in the hardware plug in a penetrating manner, the wiring terminal at the other end of the electric wire is arranged in the inserting seat, and after the upper mold plate and the lower mold plate are covered, the first mold core and the second mold core are jacked upwards by virtue of the ejector pin, so that parts needing to be subjected to injection molding are suspended; therefore, after the injection molding material is injected, the injection molding of the ear hanging part can be completed at one time.

Description

Technical Field

[0001] The utility model relates to the technical field of earphone injection molding equipment, in particular to an earhook liquid silicone injection molding mold which encapsulates plastic parts and wire ends. Background Art

[0002] As we all know, headphones are a pair of conversion units that receive electrical signals from a media player or receiver and convert them into audible sound waves using speakers close to the ears. Among the broad categories of headphones, wireless headphones have become mainstream due to their compact size and convenience. Among wireless headphones, back-hook headphones are a particular category. Compared to conventional headphones, they are most different in that they consist of three parts: the back-hook unit, the main unit, and the ear hook.

[0003] However, when it comes to injection molding of back-hook headphones, the back-hook, main body, and ear hook parts are generally injection molded separately and then connected together. The ear hook serves as a connector between the main body and the back-hook. Therefore, the ear hook structure must meet the requirements of both built-in elastic parts (silicone) and hardware for circuit transmission (including wires, hardware plugs, and terminal blocks at both ends of the wires). The combination of these two is the earphone core. Due to its curved shape and the structure of the two ends being just hardware plugs, the hardware plug only has two sockets for connecting with the main body. The two sockets are on different sides and there is no other gripping part. Therefore, the ear hook part often needs to be injection molded in batches, first injecting the outer shell, and then installing the hardware plug and wires. However, this approach requires, on the one hand, that the elastic part have an inner tube in the center line, and on the other hand, each component is injected in batches, which will make the production process cumbersome and not conducive to the rapid completion of product injection molding. It will also consume more human resources, and multiple molds need to be prepared for separate injection molding. Therefore, there are problems that need to be overcome in the rear-mounted injection mold. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an ear hook liquid silicone injection mold that contains plastic parts and wire ends.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A liquid silicone injection mold for ear hooks wrapped with plastic parts and wire ends, comprising an upper template and a lower template, wherein the lower template is provided with an injection molding station for molding the ear hook portion, wherein the injection molding station comprises a first mold core, a second mold core, an ejector pin, and two injection molding grooves, wherein the two injection molding grooves are respectively provided on the upper template and the lower template, and the two injection molding grooves are overlapped to form an injection molding cavity, wherein the lower template is provided with movable grooves corresponding to the number of the first mold core and the second mold core at one end of the injection molding groove, wherein the first mold core and the second mold core are respectively placed in the corresponding movable grooves, and the first mold core and the second mold core are respectively placed in the corresponding movable grooves. The side ends of the second mold core are each provided with an extension foot, the extension foot is placed in the injection molding groove and is provided with a plug-in end for receiving a hardware plug, the upper template is provided with a socket groove, the top ends of the first mold core and the second mold core are always in the socket groove, and space is reserved in the socket groove to accommodate the continued insertion of the first mold core and the second mold core, the ejector pin is located at the bottom of the lower template, and the top end of the ejector pin is passed through the movable groove, the other end of the injection molding groove is provided with a socket for accommodating the insertion of the terminal block, and the upper template is provided with an injection port, which is connected to the injection cavity.

[0007] Preferably, the upper template and the lower template are both provided with a material guide groove, the material guide grooves of the upper template and the lower template overlap each other, the injection port is connected to the material guide groove of the upper template, and the material guide grooves are both connected to the injection groove.

[0008] Preferably, positioning grooves are provided at the four corners of the lower template, and positioning columns are provided at the four corners of the upper template.

[0009] Preferably, chamfered surfaces are provided at the notch of the positioning groove and the top edge of the positioning column.

[0010] Preferably, there are at least two injection molding stations, and every two injection molding stations form a group. The structures of the injection molding stations in the same group are mirror-symmetrical.

[0011] Due to the adoption of the above scheme, the utility model directly uses the first mold core and the second mold core to sleeve the hardware plug, one end of the wire is inserted into the hardware plug, and the connection terminal at the other end of the wire is installed in the socket. After the upper mold plate and the lower mold plate are covered, the first mold core and the second mold core are pushed upward with the help of the ejector pin, so that the parts that need to be injection molded are suspended in the air, so that after the injection plastic is injected, the injection molding of the ear hook part can be completed at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the explosion structure of an embodiment of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the first mold core and the second mold core of an embodiment of the present utility model.

[0014] Figure 3 It is a schematic structural diagram of the embodiment of the utility model after the cover is closed.

[0015] Figure 4 It is a structural schematic diagram of the upper template of an embodiment of the utility model.

[0016] Figure 5 It is a structural schematic diagram of the lower template of an embodiment of the utility model.

[0017] Figure 6 This is a schematic diagram of the assembly of the hardware of the embodiment of the utility model before injection molding.

[0018] Figure 7 It is a schematic structural diagram of the ear hook portion after injection molding of an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0022] like Figures 1 to 7 As shown, the present embodiment provides an ear hook liquid silicone injection mold for a plastic component and a wire end, comprising an upper template 1 and a lower template 2, wherein the lower template 2 is provided with an injection molding station 3 for molding the ear hook portion, and the injection molding station 3 comprises a first mold core 31, a second mold core 32, an ejector pin 33 and two injection molding grooves 34, the two injection molding grooves 34 are respectively provided on the upper template 1 and the lower template 2, and the two injection molding grooves 34 are covered with each other to form an injection molding cavity, and the lower template 2 is provided with a number of movable grooves 21 corresponding to the first mold core 31 and the second mold core 32 at one end of the injection molding groove 34, the first mold core 31 and the second mold core 32 are respectively placed in the corresponding movable grooves 21, and the first mold core 31 and the second mold core 32 are respectively placed in the corresponding movable grooves 21. The side ends of the second mold core 32 are provided with extension legs 35, and the extension legs 35 are placed in the injection molding groove 34 and are provided with a plug-in end 36 for receiving the hardware plug 101. The upper template 1 is provided with a socket groove 11, and the top ends of the first mold core 31 and the second mold core 32 are always in the socket groove 11. There is space reserved in the socket groove 11 to meet the continued insertion of the first mold core 31 and the second mold core 32. The ejector pin 33 is located at the bottom of the lower template 2, and the top end of the ejector pin 33 is passed through the movable groove 21. The other end of the injection molding groove 34 is provided with a socket 37 for meeting the insertion of the terminal 102. The upper template 1 is provided with an injection port 12, and the injection port 12 is connected to the injection cavity.

[0023] In this embodiment, the first mold core 31 and the second mold core 32 are mainly used to connect the hardware plug 101, one end of the wire 103 is inserted into the hardware plug 101, and the terminal 102 at the other end of the wire 103 is installed in the socket 37. After the upper mold plate 1 and the lower mold plate 2 are covered, the first mold core 31 and the second mold core 32 are pushed upward with the help of the ejector pin 33, so that the parts that need to be injection molded are suspended in the air, so that after the injection plastic is injected, the injection molding of the ear hook part can be completed at one time.

[0024] It should be noted that during the specific injection molding, the upper template 1 and the lower template 2 are both built into the injection molding tooling, that is, a pusher for pressing down and an injection head for injecting material are connected to the upper part of the upper template 1, and support plates, spring columns and other components are provided under the lower template 2, which are mainly used to support the lower template 2 and the ejector pin 33. These are external components and are all components set up in conventional injection molding tooling. Therefore, this embodiment will not go into details about them one by one.

[0025] During the specific operation of this embodiment, it is necessary to first install the hardware (including the wire 103, the hardware plug 101, and the terminal blocks 102 at both ends of the wire 103), and pass the smaller terminal block 102 at one end of the wire 103 through the hole reserved in the hardware plug 101, while the larger terminal block 102 at the other end of the wire 103 remains in the hardware plug 101. Then, the two sockets on the hardware plug 101 are respectively and firmly connected with the plug ends 36 on the first mold core 31 and the second mold core 32. Then, the first mold core 31 and the second mold core 32 can be placed into the movable groove 21 at the same time, and the terminal block 102 at the other end of the wire 103 is inserted into the socket 37. At this time, one end of the wire 103 is already suspended in the air. If necessary, a thimble 33 is also provided here to ensure that it can remain suspended in the air. Then the upper mold plate 1 is pressed down to allow the injection grooves 34 to align with each other to form an injection cavity. The top ends of the first mold core 31 and the second mold core 32 are placed in the sleeve groove 11, and then continue to press down. At this time, the ejector pin 33 pushes the first mold core 31 and the second mold core 32 upward, so that the first mold core 31 and the second mold core 32 continue to be inserted into the interior of the sleeve groove 11 until they are inserted to the bottom. At this time, the hardware as a whole is suspended in the injection cavity, and then the injection material can be injected from the injection port 12 to complete the injection molding. After the injection molding is completed, the upper mold plate 1 and the lower mold plate 2 are separated, and the finished product can be removed.

[0026] Furthermore, regarding the design of the injection port 12 of this embodiment, both the upper mold plate 1 and the lower mold plate 2 are provided with a guide groove 13. The guide grooves 13 of the upper mold plate 1 and the lower mold plate 2 overlap each other, and the injection port 12 communicates with the guide groove 13 of the upper mold plate 1, and the guide grooves 13 are both connected to the injection groove 34. The provision of the guide groove 13 prevents the injection port 12 from being directly connected to the injection cavity, thereby preventing factors such as the impact of the impact of the injection pressure on the injection molded product.

[0027] Furthermore, to facilitate positioning when the upper and lower templates 1 and 2 overlap, positioning grooves 22 are provided at the four corners of the lower template 2, and positioning posts 14 are provided at the four corners of the upper template 1. Furthermore, chamfered surfaces are provided at the notches of the positioning grooves 22 and the top edges of the positioning posts 14 during docking, providing guidance and positioning.

[0028] Furthermore, the ear hook of this embodiment is divided into a left ear hook and a right ear hook, so in order to produce the left and right ear hook parts in the same batch, there are at least two injection molding stations 3 in this embodiment, and every two injection molding stations 3 form a group, and the structures between the injection molding stations 3 in the same group are mirror-symmetrical.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid silicone injection mold for ear hooks containing plastic parts and wire ends, characterized by: The invention comprises an upper template and a lower template, wherein the lower template is provided with an injection molding station for molding the ear hook part, wherein the injection molding station comprises a first mold core, a second mold core, an ejector pin and two injection molding grooves, wherein the two injection molding grooves are respectively provided on the upper template and the lower template, and the two injection molding grooves are overlapped to form an injection molding cavity, and the lower template is provided with movable grooves corresponding to the number of the first mold core and the second mold core at one end of the injection molding groove, wherein the first mold core and the second mold core are respectively placed in the corresponding movable grooves, and the side ends of the first mold core and the second mold core are both provided with An extension foot is placed in the injection molding groove and is provided with a plug-in end for receiving a hardware plug. The upper template is provided with a socket groove. The top ends of the first mold core and the second mold core are always in the socket groove. Space is reserved in the socket groove to accommodate the continued insertion of the first mold core and the second mold core. The ejector pin is located at the bottom of the lower template, and the top end of the ejector pin is passed through the movable groove. The other end of the injection molding groove is provided with a socket for inserting a terminal block. The upper template is provided with an injection port, and the injection port is connected to the injection cavity.

2. The liquid silicone injection mold for ear hooks containing plastic parts and wire ends according to claim 1, characterized in that: The upper template and the lower template are both provided with a material guide groove, the material guide grooves of the upper template and the lower template cover each other, the injection port is connected with the material guide groove of the upper template, and the material guide grooves are both connected with the injection groove.

3. The ear hook liquid silicone injection mold for a plastic component and a wire end as claimed in claim 2, characterized in that: The four corners of the lower template are all provided with positioning grooves, and the four corners of the upper template are all provided with positioning columns.

4. The liquid silicone injection mold for ear hooks containing plastic parts and wire ends according to claim 3, characterized in that: The notch of the positioning groove and the top edge of the positioning column are both provided with chamfered surfaces.

5. The liquid silicone injection mold for ear hooks containing plastic parts and wire ends according to claim 4, characterized in that: There are at least two injection molding stations, and every two injection molding stations form a group. The structures of the injection molding stations in the same group are mirror-symmetrical.

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