Molding structure of buckling type antenna shell

Abstract

The utility model discloses a plastic molding structure of a buckling type antenna shell, a mold core is arranged on a movable mold plate, the mold core is in transmission connection with an ejector rod, the other end part of the mold core extends along the mold closing direction, penetrates through a movable mold core and then extends to the outer side of the movable mold core, and a flow channel is of an underflow channel structure. The mold core is arranged to be of a structure which penetrates through the movable mold core and can extend to the fixed mold during mold closing, the forming groove is formed in the movable mold core, the groove of the step structure is formed in the fixed mold core, and the forming cavity with the two ends small and the middle large can be defined during mold closing; in the forming process, foreign matter such as a release agent on the inner wall of the cavity and gas in the cavity can be pushed into the vent hole groove through glue liquid, injection molding defects possibly generated in the injection molding process are all pushed to the outer wall of the middle of the product, and therefore the injection molding quality of the buckling contact faces of the two ends of the product is guaranteed. The underflow channel is adopted to replace a pin-point gate structure with a large contact surface, so that a slender gate mark can be prevented from being left on a product, and the appearance quality of the product is ensured.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold technology, and in particular to the plastic molding structure of a snap-fit ​​antenna housing. Background Technology

[0002] The snap-fit ​​antenna housing is generally divided into a matching upper cover and a lower cover. Both of them have a matching limiting protrusion in the middle of their outer walls. The outer or inner walls of their opposite ends form matching snap-fit ​​contact surfaces. The limiting protrusion and the snap-fit ​​contact surfaces serve as the functional and aesthetic surfaces of the antenna housing. During the molding and production process, there are strict requirements for their dimensional accuracy and molding defects.

[0003] In the molding of housing parts, most adopt a hot runner fine gate injection structure. The machining accuracy requirements of the injection structure are relatively high, the manufacturing cost is high, and large gate marks are easily left on the product after the gate is removed. For products with large functional and appearance surfaces, such as snap-fit ​​antenna housings, the machining accuracy of related structural parts on the mold is high and the area is large, resulting in high manufacturing cost. In addition, the mold is prone to leaving defects such as bubbles, black spots, and flash on the functional or appearance surfaces during molding production. The yield rate is affected by subjective and objective factors such as molding parameters and glue condition. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a molding structure for a snap-fit ​​antenna housing. When the mold is closed, a molding cavity that is small at both ends and large in the middle is formed. During the molding process, the adhesive can push foreign matter such as release agent on the inner wall of the cavity and gas in the cavity into the ventilation slot connected to the middle part. This pushes all possible injection defects that may occur during the injection molding process to the outer wall of the middle part of the product, thereby ensuring the injection molding quality of the snap-fit ​​contact surface at both ends of the product and ensuring the appearance quality of the product.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A molding structure for a snap-fit ​​antenna housing, wherein the mold is provided with a matching fixed template and a movable template, a mold core is provided on the fixed template, a movable mold core is provided on the movable template, flow channels are formed on the fixed mold core and the movable mold core, and a plurality of push rods are provided on the movable mold core, each of the push rods being connected to a driving device and being able to lift the product from the movable mold core under its drive;

[0007] The moving mold plate is provided with a core. One end of the core is connected to several ejector rods, and the other end extends along the mold closing direction and passes through the moving mold core before extending to its outer side. A first cavity is formed on the periphery of the core on the end of the moving mold core facing the fixed mold core. A second cavity adapted to the first cavity is provided on the fixed mold core.

[0008] The flow channels include a first flow channel, a second flow channel, and a third flow channel connected in sequence: the first flow channel penetrates the fixed mold core and is located outside the second cavity, with one end connected to the glue injection channel and the other end penetrating the fixed mold core; the second flow channel is located on the end of the moving mold core facing the fixed mold core and can match and connect with the first flow channel when the mold is closed, with one end extending to the outside of the first cavity; the third flow channel is located on the moving mold core, with one end connected to the second flow channel and the other end obliquely passing through the moving mold core and extending to the side wall of the first cavity.

[0009] As a further explanation of the above technical solution:

[0010] In the above technical solution, the moving template and the core are provided with matching guide structures, and the guide structures extend in the same direction as the plurality of top rods.

[0011] In the above technical solution, the moving mold core is provided with a hole and groove that is adapted to the core and penetrates the moving mold core along the mold closing direction. The inner wall of the end of the hole and groove facing the fixed mold core is provided with a molding groove that is adapted to the outer wall of the product. The third flow channel is connected to the molding groove.

[0012] In the above technical solution, the second cavity is a stepped groove, with its larger end located at the end of the fixed mold core and facing the moving mold core, and its smaller end covering the periphery of the top part of the core when the mold is closed.

[0013] In the above technical solution, the end of the fixed mold core is provided with several ventilation slots connected to the periphery of the second cavity, and each ventilation slot is connected to the air passage on the fixed mold plate.

[0014] In the above technical solution, the moving mold plate is provided with two cores, and the moving mold core is provided with a first cavity around each core. Each first cavity is connected to a third flow channel. The two third flow channels are respectively provided at both ends of a second flow channel and are connected thereto. The middle part of the second flow channel is adapted to the first flow channel and can be connected to it when the mold is closed. The fixed mold core is symmetrically provided with two second cavities on both sides of the first flow channel.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting the core to penetrate the moving mold core and extend to the fixed mold during mold closing, and by setting a molding groove on the moving mold core and a stepped groove on the fixed mold core, a molding cavity with small ends and a large middle can be formed when the mold is closed. Furthermore, since the fixed mold core has a venting groove at its end, the resin can push foreign matter such as mold release agent on the inner wall of the cavity and gas in the cavity into the venting groove during the molding process, thus pushing any injection defects that may occur during the injection molding process to the outer wall of the middle of the product, thereby ensuring the injection molding quality of the interlocking contact surfaces at both ends of the product. By using a submersible runner instead of a narrow gate structure with a large contact surface, long and thin gate marks can be avoided on the product, ensuring the appearance quality of the product. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the moving mold core in this embodiment;

[0018] Figure 3 This is a schematic diagram of the mold core structure in this embodiment.

[0019] In the diagram: 10. Fixed mold plate; 20. Fixed mold core; 30. Moving mold plate; 40. Moving mold core; 41. Hole / slot; 42. Molding groove; 50. Runner; 51. First runner; 52. Second runner; 53. Third runner; 60. Core; 70. First cavity; 80. Second cavity; 1. Ejector pin; 2. Adhesive injection channel; 3. Vent hole / slot; 90. Guide structure; 100. Product. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] like Figure 1 As shown, the molding structure of the snap-fit ​​antenna housing includes a matching fixed mold plate 10 and a movable mold plate 30. A mold core 20 is set on the fixed mold plate 10, and a movable mold core 40 is set on the movable mold plate 30. Flow channels 50 are formed on the fixed mold core 20 and the movable mold core 40. Several ejector rods 1 are provided on the movable mold core 40, each ejector rod 1 being connected to a driving device and capable of lifting the product from the movable mold core 40 under its drive. Wherein:

[0023] The moving mold plate 40 is provided with a core 60. One end of the core 60 is connected to several ejector pins 1 for transmission, and the other end extends along the mold closing direction and passes through the moving mold core 40 and extends to its outer side. The end of the moving mold core 40 facing the fixed mold core 20 forms a first cavity 70 on the periphery of the core 60. The fixed mold core 20 is provided with a second cavity 80 that is adapted to the first cavity 70.

[0024] The runner 50 includes a first runner 51, a second runner 52, and a third runner 53 connected in sequence: the first runner 51 passes through the fixed mold core 20 and is located on the outside of the second cavity 80, with one end connected to the glue injection channel 2 and the other end passing through the fixed mold core 20; the second runner 52 is located on the end of the moving mold core 40 facing the fixed mold core 20 and can be matched and connected with the first runner 51 when the mold is closed, with one end extending to the outside of the first cavity 70; the third runner 53 is located on the moving mold core 40, with one end connected to the second runner 52 and the other end obliquely passing through the moving mold core 40 and extending to the side wall of the first cavity 70.

[0025] To guide the core 60, matching guide structures 90 are provided on the moving template 30 and the core 60, and the guide structures 90 extend in the same direction as a plurality of top rods 1. In this embodiment, the guide structure 90 includes a guide post and a guide groove. The guide post is detachably fixed on the moving template 30, and the guide groove is located at the end of the core 60.

[0026] like Figure 2 As shown, the moving mold core 40 is provided with a hole 41 that is adapted to the core 60 and passes through the moving mold core in the mold closing direction. The inner wall of the end of the hole 41 facing the fixed mold core 20 is provided with a molding groove 42 that is adapted to the outer wall of the product. The third flow channel 53 is connected to the molding groove 42.

[0027] like Figure 3 As shown, the second cavity 80 is a stepped groove. Its larger end is located at the end of the fixed mold core 20 and faces the moving mold core 40. Its smaller end can cover the outer periphery of the top part of the core 60 when the mold is closed. The end of the fixed mold core 20 is provided with several ventilation slots 3 connected to it on the outer periphery of the second cavity 80. Each ventilation slot 3 is connected to the air passage on the fixed mold plate 10.

[0028] During mold closing, the end of the core 60 extends into the fixed mold core 20. The core 60, fixed mold core 20, and moving mold core 40 together enclose a molding cavity that is smaller at both ends and larger in the middle. After injection, the moving mold plate 30 and moving mold core 40 separate from the fixed mold core 20 and fixed mold plate 10. The product adheres to the moving mold core 40 and core 60. The drive device drives the ejector rod 1 to move, lifting the product from the moving mold to achieve demolding. It can be understood that since the venting groove 3 is located at the end of the fixed mold core 20, that is, at the limiting protrusion in the middle of the shell after molding, the flow of the adhesive will push foreign matter such as mold release agent on the inner wall of the cavity and the gas in the cavity into the venting groove 3. This can push all possible injection defects during the injection molding process to the limiting protrusion in the middle of the product, ensuring the injection molding quality of the interlocking contact surfaces at both ends of the product. At the same time, since a diving gate is used instead of a narrow gate structure with a larger contact surface, it can avoid leaving long and thin gate marks on the product, ensuring the appearance quality of the product.

[0029] like Figure 1 As shown, in this embodiment, the moving mold plate 30 is provided with two cores 60, and the moving mold core 40 is provided with a first cavity 70 on the periphery of each core 60. Each first cavity 70 is connected to a third flow channel 53. The two third flow channels 53 are respectively provided at both ends of a second flow channel 52 and are connected thereto. The middle part of the second flow channel 52 is adapted to the first flow channel 51 and can be connected to it when the mold is closed. The fixed mold core 20 is provided with two second cavities 80 symmetrically on both sides of the first flow channel 51.

[0030] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A molding structure for a snap-fit ​​antenna housing, wherein the molding is provided with a matching fixed mold plate and a movable mold plate, a mold core is provided on the fixed mold plate, a movable mold core is provided on the movable mold plate, flow channels are formed on the fixed mold core and the movable mold core, and a plurality of ejector rods are provided on the movable mold core, each ejector rod being driven by a driving device and capable of lifting the product from the movable mold core under its drive; characterized in that: The moving mold plate is provided with a core. One end of the core is connected to several ejector rods, and the other end extends along the mold closing direction and passes through the moving mold core before extending to its outer side. A first cavity is formed on the periphery of the core on the end of the moving mold core facing the fixed mold core. A second cavity adapted to the first cavity is provided on the fixed mold core. The flow channels include a first flow channel, a second flow channel, and a third flow channel connected in sequence: the first flow channel penetrates the fixed mold core and is located outside the second cavity, with one end connected to the glue injection channel and the other end penetrating the fixed mold core; the second flow channel is located on the end of the moving mold core facing the fixed mold core and can match and connect with the first flow channel when the mold is closed, with one end extending to the outside of the first cavity; the third flow channel is located on the moving mold core, with one end connected to the second flow channel and the other end obliquely passing through the moving mold core and extending to the side wall of the first cavity.

2. The molding structure of the snap-fit ​​antenna housing according to claim 1, characterized in that, The moving template and the core are provided with matching guide structures, which extend in the same direction as the plurality of top rods.

3. The molding structure of the snap-fit ​​antenna housing according to claim 1, characterized in that, The moving mold core is provided with a hole and groove that is adapted to the core and passes through the moving mold core along the mold closing direction. The inner wall of the end of the hole and groove facing the fixed mold core is provided with a molding groove that is adapted to the outer wall of the product. The third flow channel is connected to the molding groove.

4. The molding structure of the snap-fit ​​antenna housing according to claim 1, characterized in that, The second cavity is a stepped groove, with its larger end located at the end of the fixed mold core and facing the moving mold core, and its smaller end covering the periphery of the top part of the core when the mold is closed.

5. The molding structure of the snap-fit ​​antenna housing according to claim 1, characterized in that, The end of the fixed mold core is provided with several ventilation slots connected to the periphery of the second cavity, and each ventilation slot is connected to the air passage on the fixed mold plate.

6. The molding structure of the snap-fit ​​antenna housing according to any one of claims 1-5, characterized in that, The moving mold plate is provided with two cores. The moving mold core is provided with a first cavity around each core. Each first cavity is connected to a third flow channel. The two third flow channels are respectively located at both ends of a second flow channel and are connected thereto. The middle part of the second flow channel is adapted to the first flow channel and can be connected to it when the mold is closed. The fixed mold core is provided with two second cavities symmetrically on both sides of the first flow channel.

7. The molding structure of the snap-fit ​​antenna housing according to claim 6, characterized in that, The moving mold core is also provided with an ejector pin as described above at the lower end of the second flow channel.

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