A flow channel switching mechanism of an injection mold for an electric vehicle trunk

Abstract

The utility model relates to die technical field discloses a kind of flow channel switching mechanism of electric vehicle tail box injection mold, including equalization bin, and bin cover is installed on equalization bin, and a circle of conical feed hole is set in the outer edge of the end of equalization bin away from bin cover, and the outlet end of each conical feed hole is welded with distribution pipe at the end of equalization bin away from bin cover. The flow channel switching mechanism of electric vehicle tail box injection mold, by setting multiple distribution pipes in the bottom of equalization bin, and by permanent magnet control plugging structure to remove the blocking state of valve needle and corresponding conical feed hole, the opening and closing state of corresponding each shunt hole circular table boss is independently controlled, simultaneously, the switching between different flow channels can be quickly switched, the time required for flow channel switching in traditional successive injection molding is eliminated, the whole injection molding cycle is significantly shortened, and circular table boss directly blocks non-working flow channel, to avoid waste of injection liquid in flow channel switching process.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a flow channel switching mechanism for an injection mold for an electric vehicle tail box. Background Technology

[0002] With the booming development of the electric vehicle industry, the demand for tail boxes, an important cargo-carrying component of electric vehicles, has increased significantly. Electric vehicle tail boxes are usually large in size and relatively complex in structure, and injection molding is commonly used in their production. In order to improve the uniformity of filling of large and complex plastic parts and reduce internal stress and deformation, multi-gate injection is often used in mold design, which requires setting up multiple runners to guide the molten plastic to different areas of the mold cavity.

[0003] Traditional injection molds typically employ a single-channel sequential injection method, which involves manually or mechanically switching the on / off states of different channels to fill the injection fluid. Because each runner needs to be injected in steps and in sequence, each runner switching requires additional operation time. The process of switching runners one by one is time-consuming. Especially for electric vehicle tail box molds with complex structures and a large number of runners, frequent runner switching will significantly extend the single injection cycle, making it difficult to meet the needs of large-scale production. Utility Model Content

[0004] In view of the fact that the existing process of switching flow channels one by one is time-consuming and difficult to meet the needs of large-scale production, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a flow channel switching mechanism for an injection mold of an electric vehicle tail box, which aims to quickly switch the flow and improve injection efficiency.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a flow channel switching mechanism for an electric vehicle tail box injection mold, including a flow equalization chamber and a chamber cover installed on the flow equalization chamber. A ring of conical material passage holes is opened on the outer edge of the flow equalization chamber away from the chamber cover. A material distribution pipe is welded to the outlet end of each conical material passage hole at the end of the flow equalization chamber away from the chamber cover. An injection pipe is inserted and installed at the center of the end of the chamber cover away from the flow equalization chamber. A blocking structure is installed on the top of the bin cover and directly above each conical feed hole. The movable end of the blocking structure inside the flow equalization bin is fixedly equipped with a valve needle for blocking the conical feed hole. A rotating structure, wherein the rotating structure rotates around the injection tube as the rotating axis, and a permanent magnet for controlling the material blockage structure is installed at the rotation point of the rotating structure.

[0007] As an improved technical solution, the valve needle is integrally formed with a frustum protrusion at one end near the conical feed hole, and the frustum protrusion is adapted to the conical feed hole.

[0008] As an improved technical solution, the blocking structure includes a sleeve, with a hole cover fixed at the end of the sleeve away from the valve needle, a hanging platform vertically slidably installed inside the hole cover, and a spring installed between the hanging platform and the hole cover.

[0009] As an improved technical solution, a permanent magnet block is coaxially mounted on the end of the mounting platform away from the valve needle, and the opposing surfaces of the permanent magnet block and the permanent magnet are magnetically attracted to each other. A hollow column is welded to the end of the hole cover near the mounting platform, and the permanent magnet block, the hole cover and the hollow column are all coaxially arranged.

[0010] As an improved technical solution, guide strips are fixed on both sides inside the sleeve, and sliding grooves through which male guide strips pass are opened on both sides of the mounting platform.

[0011] As an improved technical solution, the rotating structure includes a rotating sleeve installed on the injection tube, one end of the rotating sleeve is fitted with a rotating strip plate, and a permanent magnet is inserted and installed at the end of the rotating strip plate away from the injection tube.

[0012] As an improved technical solution, the rotating structure also includes a servo motor fixed by a bracket, and a belt synchronizer is installed between the drive end of the servo motor and the rotating sleeve.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, the rotating strip rotates with the injection pipe as the rotation point, so that the permanent magnet passes directly above each blocking structure in sequence. That is, one permanent magnet can be used for multiple blocking structures. It can be switched between different blocking structures, and different conical material passages are opened to connect the flow channels. It also helps to reduce the cost of use.

[0014] 2. This utility model, by setting multiple distribution pipes at the bottom of the flow equalization chamber and using a permanent magnet to control the material blocking structure to release the blockage state of the valve needle and the corresponding conical material passage, independently controls the opening and closing state of the frustum protrusion of each distribution hole, accurately selects the flow channel to be opened, and can quickly switch between different flow channels, eliminating the time required for flow channel switching in traditional sequential injection molding, significantly shortening the entire injection molding cycle. Furthermore, the frustum protrusion directly blocks non-working flow channels, avoiding waste of injection molding liquid during flow channel switching. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of the flow channel switching mechanism of the injection mold for the tail box of an electric vehicle according to this utility model.

[0016] Figure 2 This is a schematic diagram of the rotating structure of the flow channel switching mechanism of the injection mold for the tail box of an electric vehicle according to the present invention.

[0017] Figure 3 This is a schematic diagram of the separation structure of the flow equalization chamber and the chamber cover of the flow channel switching mechanism of the electric vehicle tail box injection mold according to the present invention.

[0018] Figure 4 This is a cross-sectional view of the sleeve of the flow channel switching mechanism of the injection mold for the tail box of an electric vehicle according to the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Flow equalization chamber; 2. Chamber cover; 3. Material blocking structure; 31. Sleeve; 32. Permanent magnet block; 33. Spring; 34. Hole cover; 35. Hollow column; 36. Guide bar; 37. Hanging platform; 4. Distribution pipe; 5. Permanent magnet; 6. Injection pipe; 7. Rotating structure; 71. Servo motor; 72. Belt synchronizer; 73. Rotating sleeve; 74. Rotating strip; 8. Conical material passage hole; 9. Valve needle; 91. Frustum head. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Example 1

[0021] Reference Figures 1-4 This is the first embodiment of the present invention, which provides a flow channel switching mechanism for an injection mold of an electric vehicle tail box. This flow channel switching mechanism for an injection mold of an electric vehicle tail box includes a flow equalization chamber 1 and a chamber cover 2 installed on the flow equalization chamber 1. A ring of conical material passage holes 8 are opened on the outer edge of the end of the flow equalization chamber 1 away from the chamber cover 2. A material distribution pipe 4 is welded to the end of the flow equalization chamber 1 away from the chamber cover 2 and directly opposite the outlet end of each conical material passage hole 8. An injection pipe 6 is inserted and installed at the center of the end of the chamber cover 2 away from the flow equalization chamber 1, and the flow equalization chamber 1 and the injection pipe 6 are internally connected. A blocking structure 3 is installed on the top of the bin cover 2 and directly above each conical material passage hole 8. The movable end of the blocking structure 3 located inside the flow equalization bin 1 is fixedly installed with a valve needle 9 for blocking the conical material passage hole 8. The rotating structure 7 rotates around the injection pipe 6 as the rotation axis, and a permanent magnet 5 for controlling the blockage structure 3 is installed at the rotation point of the rotating structure 7.

[0022] The valve needle 9 has an integrally formed frustum head 91 at one end near the conical feed hole 8, and the frustum head 91 is adapted to the conical feed hole 8. The dual blocking of the conical feed hole 8 by the frustum head 91 and the valve needle 9 effectively ensures that the injection plastic cannot flow downward through the conical feed hole 8.

[0023] The blocking structure 3 includes a sleeve 31. A hole cover 34 is fixed to one end of the sleeve 31 away from the valve needle 9. A hanging platform 37 is vertically slidably installed inside the hole cover 34, and the bottom end of the hanging platform 37 is located outside the sleeve 31. The valve needle 9 is fixed to the bottom of the hanging platform 37. A spring 33 is installed between the hanging platform 37 and the hole cover 34.

[0024] A permanent magnet 32 ​​is coaxially mounted on the end of the mounting plate 37 away from the valve needle 9, and the opposite surfaces of the permanent magnet 32 ​​and the permanent magnet 5 are magnetically attracted to each other. A hollow column 35 is welded to the end of the hole cover 34 near the mounting plate 37, and the permanent magnet 32, the hole cover 34 and the hollow column 35 are all coaxially arranged. A spring 33 is installed between the permanent magnet 32 ​​and the hollow column 35.

[0025] Guide bars 36 are fixed on both sides inside the sleeve 31, and grooves through which male guide bars 36 pass are opened on both sides of the mounting platform 37.

[0026] During use, multiple distribution pipes 4 are set at the bottom of the flow equalization chamber 1, and the blocking structure 3 is controlled by the permanent magnet 5 to release the blockage state of the valve needle 9 and the corresponding conical material passage 8. The opening and closing state of the frustum protrusion 91 of each distribution hole is independently controlled, and the flow channel to be opened is precisely selected. At the same time, the switching between different flow channels can be quickly switched, eliminating the time required for flow channel switching in traditional sequential injection molding, significantly shortening the entire injection molding cycle. In addition, the frustum protrusion 91 directly blocks the non-working flow channel, avoiding the waste of injection molding liquid during the flow channel switching process. Example 2

[0027] Reference Figures 1-2 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the rotating structure 7 includes a rotating sleeve 73 installed on the injection tube 6. One end of the rotating sleeve 73 is sleeved with a rotating strip 74, and the permanent magnet 5 is inserted and installed at the end of the rotating strip 74 away from the injection tube 6.

[0028] The rotating structure 7 also includes a servo motor 71 fixed by a bracket. A belt synchronizer 72 is installed between the drive end of the servo motor 71 and the rotating sleeve 73. The belt synchronizer 72 consists of two synchronous pulleys and a synchronous belt assembly, and the two synchronous pulleys are driven by a synchronous belt.

[0029] During use, the servo motor 71 drives the rotating sleeve 73 to rotate through the belt synchronizer 72. The rotating strip 74 rotates with the injection tube 6 as the rotation point, so that the permanent magnet 5 passes directly above each blocking structure 3 in sequence. That is, one permanent magnet 5 can be used for multiple blocking structures 3. It can be switched between different blocking structures 3 to open different conical material passage holes 8 to connect the flow channels, and it also helps to reduce the cost of use.

[0030] The remaining structure is the same as that in Example 1.

[0031] Based on embodiments 1-2, the working principle of this utility model is as follows: the injection plastic is injected into the interior of the flow equalization chamber 1 through the injection tube 6, and the rotating sleeve 73 is driven to rotate by the servo motor 71 through the belt synchronization component 72. The rotating strip 74 rotates with the injection tube 6 as the rotation point, so that the permanent magnet 5 passes directly above each blocking structure 3 in sequence. When the permanent magnet 5 rotates to the top of the blocking structure 3, under the magnetic attraction between the permanent magnet 5 and the permanent magnet block 32, the hanging platform 37 is pulled upward, that is, the truncated cone protrusion 91 is moved out from the inside of the conical material passage hole 8, and the valve needle 9 is moved away from the inlet of the conical material passage hole 8. At this time, the injection plastic in the flow equalization chamber 1 can flow into the inside of the distribution pipe 4 through the open conical material passage hole 8, and then enter different flow channels. When the permanent magnet 5 moves away from directly above the blocking structure 3, under the elastic reset action of the spring 33, the hanging platform 37 is driven to move downward, blocking the truncated cone protrusion 91 inside the conical feed hole 8, and the valve needle 9 presses the inlet end of the conical feed hole 8.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A flow channel switching mechanism for an injection mold of an electric vehicle tail box, comprising a flow equalization chamber (1) and a chamber cover (2) mounted on the flow equalization chamber (1), characterized in that: A ring of conical material passage holes (8) is opened on the outer edge of the end of the flow equalization chamber (1) away from the chamber cover (2). A material distribution pipe (4) is welded to the end of the flow equalization chamber (1) away from the chamber cover (2) and to the outlet end of each conical material passage hole (8). A material injection pipe (6) is inserted and installed at the center of the end of the chamber cover (2) away from the flow equalization chamber (1). A blocking structure (3) is installed on the top of the bin cover (2) and directly above each conical feed hole (8). The movable end of the blocking structure (3) located inside the flow equalization bin (1) is fixedly installed with a valve needle (9) for blocking the conical feed hole (8). The rotating structure (7) rotates around the injection pipe (6) as the rotation axis, and the rotating point of the rotating structure (7) is equipped with a permanent magnet (5) for controlling the blockage structure (3).

2. The flow channel switching mechanism for an electric vehicle tail box injection mold according to claim 1, characterized in that: The valve needle (9) has a frustum protrusion (91) integrally formed at one end near the conical feed hole (8), and the frustum protrusion (91) is adapted to the conical feed hole (8).

3. The flow channel switching mechanism for an electric vehicle tail box injection mold according to claim 2, characterized in that: The blocking structure (3) includes a sleeve (31), and a hole cover (34) is fixed at one end of the sleeve (31) away from the valve needle (9). A hanging platform (37) is vertically slidably installed inside the hole cover (34), and a spring (33) is installed between the hanging platform (37) and the hole cover (34).

4. The flow channel switching mechanism for an electric vehicle tail box injection mold according to claim 3, characterized in that: The end of the mounting plate (37) away from the valve needle (9) is coaxially mounted with a permanent magnet block (32), and the opposite surfaces of the permanent magnet block (32) and the permanent magnet (5) are magnetically attracted to each other. The end of the hole cover (34) near the mounting plate (37) is welded with a hollow column (35), and the permanent magnet block (32), the hole cover (34) and the hollow column (35) are all coaxially arranged.

5. The flow channel switching mechanism for an electric vehicle tail box injection mold according to claim 4, characterized in that: Guide strips (36) are fixed on both sides inside the sleeve (31), and grooves through which male guide strips (36) pass are opened on both sides of the mounting platform (37).

6. The flow channel switching mechanism for an electric vehicle tail box injection mold according to claim 5, characterized in that: The rotating structure (7) includes a rotating sleeve (73) installed on the injection tube (6), one end of which is fitted with a rotating strip (74), and a permanent magnet (5) is inserted and installed at the end of the rotating strip (74) away from the injection tube (6).

7. The flow channel switching mechanism for an electric vehicle tail box injection mold according to claim 6, characterized in that: The rotating structure (7) also includes a servo motor (71) fixed by a bracket, and a belt synchronizer (72) is installed between the drive end of the servo motor (71) and the rotating sleeve (73).

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