Insert core mechanism and forming device

Abstract

The utility model relates to the technical field of injection molding, in particular to an insert core mechanism and a molding device. The insert core mechanism can simplify the mechanical structure and improve the demolding efficiency, is applied to a male mold assembly and a female mold assembly which are provided with open-close fit, and comprises an insert core part which is arranged on the side, facing the male mold assembly, of the female mold assembly and is provided with a containing groove and a conical groove which are communicated with each other, and the conical groove is far away from the male mold assembly relative to the containing groove; the inner diameter of one end of the conical groove adjacent to the accommodating groove is smaller than that of one end of the conical groove away from the accommodating groove; the elastic sleeve piece comprises a sleeve body, a forming body and a protruding body, the sleeve body movably penetrates through the containing groove and the conical groove, the forming body and the protruding body are sequentially arranged on the side wall of the sleeve body at intervals in the mold opening direction, and the forming body is adjacent to the male mold assembly relative to the protruding body; and the shaft core piece movably penetrates through the sleeve body in the mold opening direction. The forming device comprises the insert core mechanism and a forming die with a male die assembly and a female die assembly which are matched in an opening and closing mode, and the insert core mechanism is connected with the female die assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to an injection mechanism and a molding device. Background Art

[0002] Today, the market is increasingly demanding novelty in product appearance and structural complexity, which leads to new challenges in mold design, especially when dealing with small and complex products. Traditional injection molding technology has many limitations when dealing with micro products with inner circle undercuts, such as large mold space occupation and complex mold structure, which in turn leads to low demolding efficiency of the molding mold. Utility Model Content

[0003] In view of the above situation, it is necessary to provide an inserting mechanism and a molding device to simplify the mechanical structure and improve the demoulding efficiency.

[0004] The embodiment of the present application provides an insertion mechanism, which is applied to a molding die provided with a male mold component and a female mold component that are matched with each other. The insertion mechanism includes:

[0005] An inserting member is provided on a side of the female mold assembly facing the male mold assembly, and is provided with a receiving groove and a tapered groove in communication in sequence along the mold opening direction, the tapered groove is away from the male mold assembly relative to the receiving groove, and the inner diameter of one end of the tapered groove adjacent to the receiving groove is smaller than the inner diameter of one end of the tapered groove away from the receiving groove;

[0006] The elastic sleeve member comprises a sleeve body, a forming body and a protruding body, wherein the sleeve body is movably arranged in the receiving groove and the tapered groove, the forming body and the protruding body are sequentially arranged at intervals on the side wall of the sleeve body along the mold opening direction, and the forming body is adjacent to the male mold assembly relative to the protruding body;

[0007] A shaft core piece is movably arranged on the sleeve body along the mold opening direction;

[0008] When the mold is closed, the sleeve body, the insert, the shaft core and the male mold assembly are combined to form a molding cavity, and the molding cavity is used for injection molding a workpiece with an inner cavity. The molding body is located in the molding cavity and is used to form a barb structure on the inner wall of the inner cavity of the workpiece. The protrusion is located on the side of the conical groove away from the receiving groove. When the mold is opened, the sleeve body pushes the workpiece out of the molding cavity and drives the protrusion to move into the conical groove. The protrusion drives the end of the sleeve body adjacent to the male mold assembly to elastically deform and shrink under the push of the groove wall of the conical groove, so that the molding body is separated from the barb structure.

[0009] In some embodiments, the insertion member is further provided with a transition groove, which is provided at one end of the conical groove away from the receiving groove and connected to the conical groove, and the transition groove is gap-matched with the protrusion.

[0010] In some embodiments, an arc-shaped transition portion is provided at one end of the transition groove adjacent to the tapered groove, and the arc-shaped transition portion is connected to the groove wall of the tapered groove.

[0011] In some embodiments, the receiving groove includes a first groove and a second groove that are connected to each other, the second groove is connected to the conical groove, the second groove is adapted to the sleeve body, and the first groove and the sleeve body are gap-matched and used to enclose and form the forming cavity.

[0012] In some embodiments, the sleeve body comprises:

[0013] A main body, movably arranged in the female mold assembly;

[0014] A plurality of sleeve portions are arranged at intervals along the circumference of the main body and are all connected to one end of the main body adjacent to the male mold assembly. The plurality of sleeve portions are movably inserted into the tapered groove and the receiving groove and are surrounded to form an accommodating groove, which is used to accommodate the shaft core member. The forming body and the protrusion are arranged at intervals on the side wall of the sleeve portion along the mold opening direction.

[0015] In some embodiments, the shaft core comprises:

[0016] A shaft core part, movably arranged in the receiving groove;

[0017] A plurality of forming parts are arranged at intervals along the circumference of the shaft core part on the side wall of the shaft core part and are arranged one-to-one corresponding to the plurality of sleeve parts. Each of the forming parts extends between two adjacent sleeve parts to enclose and form the forming cavity.

[0018] In some embodiments, a connected retaining groove and a avoiding groove are formed between the side walls of two adjacent sleeve parts, the retaining groove is adjacent to the male mold assembly relative to the avoiding groove, the retaining groove is adapted to the molding part, and the avoiding groove has a clearance fit with the molding part.

[0019] In some embodiments, the sum of the length of the retaining groove along the mold opening direction and the length of the avoidance groove along the mold opening direction is greater than the sum of the movement distance of the elastic sleeve during mold opening and the length of the forming part along the mold opening direction.

[0020] In some embodiments, the accommodating groove includes a communicating abutting groove and a movable groove, the abutting groove is adjacent to the male mold assembly relative to the movable groove, the abutting groove is adapted to the shaft core portion, and the movable groove is clearance-matched with the shaft core portion.

[0021] The present application provides a molding device, comprising:

[0022] The above mentioned sub-institutions;

[0023] The molding die comprises a male mold component and a female mold component which are matched with each other. The insertion mechanism is arranged on a side of the female mold component facing the male mold component and is connected to the female mold component.

[0024] When the above-mentioned molding device is in mold closing, the sleeve body, the insert, the shaft core and the male mold assembly are combined to form a molding cavity. The molding cavity receives the molten plastic and injection molds the workpiece. The molding body is located in the molding cavity, and a barb structure is formed on the inner wall of the inner cavity of the workpiece. At this time, the protrusion is located on the side of the conical groove away from the receiving groove. When the molding device is in mold opening, the male mold assembly and the female mold assembly are opened, the sleeve body pushes the molded workpiece out of the molding cavity, and drives the protrusion to move into the conical groove. The protrusion drives the end of the sleeve body adjacent to the male mold assembly to elastically deform and shrink under the push of the groove wall of the conical groove, so that the molding body is separated from the barb structure. In this way, the groove wall of the tapered groove pushes the protrusion that moves into the tapered groove when the mold is opened, so that the end of the sleeve body adjacent to the male mold component can be elastically deformed and contracted, so that a gap is formed between the molded body and the barb structure, and the demolding operation can be quickly completed without using a complex mechanical structure to complete the demolding, thereby simplifying the mechanical structure and improving the demolding efficiency. In addition, the elastic sleeve part can be reset after the workpiece is demolded according to its own elastic characteristics, and the molding operation can be repeated. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A structural breakdown diagram of the forming device and the workpiece to which it is adapted provided in an embodiment of the present application.

[0026] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the workpiece shown.

[0027] Figure 3 for Figure 1 The three-dimensional structural schematic diagram of the entry mechanism is shown.

[0028] Figure 4 for Figure 3 Schematic diagram of the structural decomposition of the entry mechanism shown.

[0029] Figure 5 for Figure 3 The cross-sectional view of the entry mechanism along the V-V direction is shown.

[0030] Figure 6 for Figure 3 A schematic three-dimensional structural diagram of the elastic sleeve component and the shaft core component is shown.

[0031] Figure 7 for Figure 6 The enlarged schematic diagram of the elastic sleeve member and the shaft core member at position Ⅶ is shown.

[0032] Main component symbols

[0033] Enter the sub-institution 100

[0034] Insert sub-component 10

[0035] Storage slot 11

[0036] First slot 111

[0037] Second slot 112

[0038] Conical groove 12

[0039] Transition trough 13

[0040] Arc transition portion 131

[0041] Elastic sleeve member 20

[0042] Sleeve body 21

[0043] Main body 211

[0044] Sleeve portion 212

[0045] Receiving slot 2121

[0046] Supporting groove 2121a

[0047] Active slot 2121b

[0048] Holder slot 2122

[0049] Avoidance slot 2123

[0050] Molded body 22

[0051] Protrusion 23

[0052] Axis core 30

[0053] Shaft core 31

[0054] Forming section 32

[0055] Molding device 200

[0056] Molding mold 201

[0057] Male mold components 2011

[0058] Master mold assembly 2012

[0059] Workpiece 300

[0060] Inner cavity 301

[0061] Barb structure 302

[0062] The first length A

[0063] The second length B

[0064] The third length C DETAILED DESCRIPTION

[0065] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0066] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. 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 technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0067] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0069] See also Figure 1The embodiment of the present application provides a molding device 200, which includes a molding die 201 and an inserting mechanism 100. The molding die 201 includes a male mold component 2011 and a female mold component 2012 that are matched with each other. The inserting mechanism 100 is arranged on the side of the female mold component 2012 facing the male mold component 2011 and connected to the female mold component 2012. The molding device 200 is used to mold a workpiece 300. Please refer to Figure 2 The workpiece 300 has an inner cavity 301, and the inner wall of the inner cavity 301 is provided with a barb structure 302. Exemplarily, the workpiece 300 can be a buckle in the electronic workpiece 300.

[0070] Please refer to 1. Figure 3 , Figure 4 and Figure 5 The inserting mechanism 100 includes an inserting member 10, an elastic sleeve member 20 and an axis core member 30. The inserting member 10 is arranged on the side of the female mold assembly 2012 facing the male mold assembly 2011, and is provided with a receiving groove 11 and a tapered groove 12 that are connected in sequence along the mold opening direction. The tapered groove 12 is away from the male mold assembly 2011 relative to the receiving groove 11, and the inner diameter of the end of the tapered groove 12 adjacent to the receiving groove 11 is smaller than the inner diameter of the end of the tapered groove 12 away from the receiving groove 11. The elastic sleeve member 20 includes a sleeve body 21, a forming body 22 and a protrusion 23. The sleeve body 21 is movably arranged in the receiving groove 11 and the tapered groove 12. The forming body 22 and the protrusion 23 are sequentially arranged at intervals on the side wall of the sleeve body 21 along the mold opening direction. The forming body 22 is adjacent to the male mold assembly 2011 relative to the protrusion 23. The axis core member 30 is movably arranged in the sleeve body 21 along the mold opening direction. Exemplarily, the elastic sleeve member 20 may be made of spring steel.

[0071] When the above-mentioned molding device 200 is in mold closing, the sleeve body 21, the insert 10, the shaft core member 30 and the male mold assembly 2011 are combined to form a molding cavity, the molding cavity receives the molten plastic and injection molds the workpiece 300, the molding body 22 is located in the molding cavity, and the barb structure 302 is formed on the inner wall of the inner cavity 301 of the workpiece 300, at this time, the protrusion 23 is located on the side of the conical groove 12 away from the receiving groove 11, when the molding device 200 is in mold opening, the male mold assembly 2011 and the female mold assembly 2012 are opened, the sleeve body 21 pushes the molded workpiece 300 out of the molding cavity, and drives the protrusion 23 to move into the conical groove 12, the protrusion 23 drives the end of the sleeve body 21 adjacent to the male mold assembly 2011 to elastically deform and shrink under the push of the groove wall of the conical groove 12, so that the molding body 22 is separated from the barb structure 302. In this way, the groove wall of the conical groove 12 pushes the protrusion 23 that is moved into the conical groove 12 when the mold is opened, so that the end of the sleeve body 21 adjacent to the male mold component 2011 can be elastically deformed and contracted, so that a gap is formed between the molding body 22 and the barb structure 302, and the demolding operation can be completed quickly without using a complex mechanical structure to complete the demolding, thereby simplifying the mechanical structure and improving the demolding efficiency. In addition, the elastic sleeve member 20 can be reset after the workpiece 300 is demolded according to its own elastic characteristics, and the molding operation can be repeated.

[0072] It can be understood that since the materials of each component in the elastic sleeve member 20 are elastic materials, and the inner diameter of the end of the conical groove 12 adjacent to the receiving groove 11 is smaller than the inner diameter of the end of the conical groove 12 away from the receiving groove 11, when the molding device 200 opens the mold, the protrusion 23 drives the end of the sleeve body 21 adjacent to the male mold component 2011 to tilt and elastically deform close to the central axis of the sleeve body 21 under the push of the groove wall of the conical groove 12, so that the end of the sleeve body 21 adjacent to the male mold component 2011 shrinks toward the central axis of the sleeve body 21, thereby separating the molding body 22 and the barb structure 302 from each other, thereby facilitating the demolding of the workpiece 300.

[0073] See also Figure 5 In some embodiments, the insertion member 10 is further provided with a transition groove 13 , which is provided at one end of the tapered groove 12 away from the receiving groove 11 and connected to the tapered groove 12 , and the transition groove 13 is clearance-matched with the protrusion 23 .

[0074] In this way, by setting the above-mentioned transition groove 13 and the clearance fit with the protrusion 23, it helps the protrusion 23 to move smoothly into the tapered groove 12 when the mold is opened, thereby reducing friction and damage to the protrusion 23, increasing the service life of the protrusion 23 and reducing the cost of use.

[0075] Please continue reading Figure 5 In some embodiments, an arc-shaped transition portion 131 is provided at one end of the transition groove 13 adjacent to the tapered groove 12 , and the arc-shaped transition portion 131 is connected to the groove wall of the tapered groove 12 .

[0076] In this way, by setting the above-mentioned arc-shaped transition portion 131, the transition groove 13 and the tapered groove 12 can be smoothly connected, so that the protrusion 23 can be stably moved into the tapered groove 12 through the arc-shaped transition portion 131, thereby ensuring that the groove wall of the tapered groove 12 stably pushes the protrusion 23, thereby improving the demolding stability.

[0077] In some embodiments, the receiving groove 11 includes a first groove 111 and a second groove 112 connected to each other, the second groove 112 is connected to the tapered groove 12, the second groove 112 is adapted to the sleeve body 21, and the first groove 111 and the sleeve body 21 are gap-matched and used to enclose and form a molding cavity.

[0078] In this way, by setting the first groove 111 to match the clearance between the sleeve body 21, the molten plastic can stably flow into the partial molding cavity formed between the sleeve body 21 and the groove wall of the first groove 111, which is convenient for the molding device 200 to stably mold the workpiece 300. By setting the second groove 112 to match the sleeve body 21, it is possible to avoid the formation of a gap between the sleeve body 21 and the groove wall of the second groove 112, thereby preventing the molten plastic from flowing into the second groove 112 through the gap formed between the two and damaging the entry mechanism 100. This helps the entry mechanism 100 to stably perform molding operations.

[0079] See also Figure 4 and Figure 5 In some embodiments, the sleeve body 21 includes a main body 211 and a plurality of sleeve parts 212. The main body 211 is movably inserted into the female mold assembly 2012, and the plurality of sleeve parts 212 are arranged at intervals along the circumference of the main body 211 and are connected to one end of the main body 211 adjacent to the male mold assembly 2011. The plurality of sleeve parts 212 are movably inserted into the tapered groove 12 and the receiving groove 11 and are arranged to form a receiving groove 2121, which is used to accommodate the shaft core 30. The molding body 22 and the protrusion 23 are arranged at intervals on the side wall of the sleeve part 212 along the mold opening direction. For example, the above-mentioned plurality refers to two or more.

[0080] In this way, by setting the specific structure of the above-mentioned sleeve body 21, multiple sleeve parts 212 can be surrounded to form a receiving groove 2121 for accommodating the shaft core member 30, which helps to reasonably layout the sub-mechanism 100, thereby optimizing the space utilization of the molding device 200 and simplifying the mechanical structure of the molding device 200.

[0081] Please continue reading Figure 4 and Figure 5In some embodiments, the shaft core member 30 includes a shaft core portion 31 and a plurality of forming portions 32. The shaft core portion 31 is movably arranged in the receiving groove 2121, and the plurality of forming portions 32 are arranged at intervals along the circumference of the shaft core portion 31 on the side wall of the shaft core portion 31, and are arranged one by one corresponding to the plurality of sleeve portions 212, and each forming portion 32 extends between two adjacent sleeve portions 212 to enclose and form a forming cavity.

[0082] Thus, by setting the specific structure of the shaft core member 30 , each molding portion 32 can be extended into between two adjacent sleeve portions 212 , effectively enclosing and forming a molding cavity of the injection molded workpiece 300 , thereby ensuring the molding stability of the insertion mechanism 100 .

[0083] See also Figure 4 , Figure 6 and Figure 7 In some embodiments, a connected retaining groove 2122 and a avoiding groove 2123 are formed between the side walls of two adjacent sleeve portions 212. The retaining groove 2122 is adjacent to the male mold component 2011 relative to the avoiding groove 2123. The retaining groove 2122 is adapted to the molding portion 32, and the avoiding groove 2123 is clearance-matched with the molding portion 32.

[0084] In this way, by setting the clamping groove 2122 to match the molding part 32, the molding part 32 is clamped into the clamping groove 2122 when the mold is closed, so as to prevent the molten plastic from entering the receiving groove 2121 through the gap between the groove wall of the clamping groove 2122 and the molding part 32, thereby improving the molding stability of the sub-entry mechanism 100. In addition, when the mold is opened, the sleeve body 21 moves closer to the male mold component 2011 relative to the shaft core member 30. By setting the avoidance groove 2123 to match the gap of the molding part 32, the molding part 32 can be stably moved into the avoidance groove 2123, avoiding interference between the sleeve body 21 and the molding part 32, and ensuring the demolding stability of the sub-entry mechanism 100.

[0085] See also Figure 7 In some embodiments, the sum of the length of the clamping groove 2122 along the mold opening direction and the length of the avoidance groove 2123 along the mold opening direction is greater than the sum of the movement distance of the elastic sleeve member 20 during mold opening and the length of the molding portion 32 along the mold opening direction. The length of the clamping groove 2122 along the mold opening direction is a first length A, the length of the avoidance groove 2123 along the mold opening direction is a second length B, and the length of the molding portion 32 along the mold opening direction is a third length C.

[0086] In this way, by setting the sum of the length of the retaining groove 2122 and the length of the avoidance groove 2123 to be greater than the sum of the movement distance of the elastic sleeve member 20 and the length of the forming portion 32, the retaining groove 2122 and the avoidance groove 2123 can provide the forming portion 32 with a sufficiently large avoidance space when the mold is opened, thereby avoiding interference between the elastic sleeve member 20 and the forming portion 32 when the mold is opened, and effectively ensuring the operating stability of the sub-mechanism 100 when the mold is opened, thereby preventing the sub-mechanism 100 from being damaged when the mold is opened, thereby improving the demolding stability and the service life of the molding device 200.

[0087] See also Figure 4 and Figure 5 In some embodiments, the accommodating groove 2121 includes a connected supporting groove 2121a and a movable groove 2121b, the supporting groove 2121a is adjacent to the male mold component 2011 relative to the movable groove 2121b, the supporting groove 2121a is adapted to the shaft core portion 31, and the movable groove 2121b is clearance-matched with the shaft core portion 31.

[0088] Thus, by providing the supporting groove 2121a to match the shaft core 31, it is possible to ensure that the groove wall of the supporting groove 2121a abuts against the shaft core 31 during mold closing, thereby avoiding the formation of a gap between the groove wall of the supporting groove 2121a and the shaft core 31, which causes the molten plastic to flow into the sleeve body 21, and thus helps the sub-entry mechanism 100 to perform molding operations normally. In addition, by providing the movable groove 2121b to match the shaft core 31 with a gap, it is possible to form a sufficiently large movable space between the shaft core 31 and the sleeve 212 during mold opening, thereby preventing the sleeve 212 from interfering with the shaft core 31 when it contracts inward, and thus helps the sub-entry mechanism 100 to perform demolding operations normally.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. An inserting mechanism, applied to a molding die provided with a male mold component and a female mold component with opening and fitting, characterized in that: The sub-organization includes: An inserting member is provided on a side of the female mold assembly facing the male mold assembly, and is provided with a receiving groove and a tapered groove in communication in sequence along the mold opening direction, the tapered groove is away from the male mold assembly relative to the receiving groove, and the inner diameter of one end of the tapered groove adjacent to the receiving groove is smaller than the inner diameter of one end of the tapered groove away from the receiving groove; The elastic sleeve member comprises a sleeve body, a forming body and a protruding body, wherein the sleeve body is movably arranged in the receiving groove and the tapered groove, the forming body and the protruding body are sequentially arranged at intervals on the side wall of the sleeve body along the mold opening direction, and the forming body is adjacent to the male mold assembly relative to the protruding body; A shaft core piece is movably arranged on the sleeve body along the mold opening direction; When the mold is closed, the sleeve body, the insert, the shaft core and the male mold assembly are combined to form a molding cavity, and the molding cavity is used for injection molding a workpiece with an inner cavity. The molding body is located in the molding cavity and is used to form a barb structure on the inner wall of the inner cavity of the workpiece. The protrusion is located on the side of the conical groove away from the receiving groove. When the mold is opened, the sleeve body pushes the workpiece out of the molding cavity and drives the protrusion to move into the conical groove. The protrusion drives the end of the sleeve body adjacent to the male mold assembly to elastically deform and shrink under the push of the groove wall of the conical groove, so that the molding body is separated from the barb structure.

2. The insertion mechanism according to claim 1, characterized in that: The insert is further provided with a transition groove, which is provided at one end of the tapered groove away from the receiving groove and connected to the tapered groove, and the transition groove is clearance-matched with the protrusion.

3. The insertion mechanism according to claim 2, characterized in that: An arc-shaped transition portion is provided at one end of the transition groove adjacent to the tapered groove, and the arc-shaped transition portion is connected to the groove wall of the tapered groove.

4. The insertion mechanism according to claim 1, characterized in that: The receiving groove includes a first groove and a second groove that are connected to each other, the second groove is connected to the tapered groove, the second groove is adapted to the sleeve body, and the first groove and the sleeve body are gap-matched and are used to enclose and form the forming cavity.

5. The insertion mechanism according to claim 1, characterized in that: The sleeve body comprises: A main body, movably arranged in the female mold assembly; A plurality of sleeve portions are arranged at intervals along the circumference of the main body and are all connected to one end of the main body adjacent to the male mold assembly. The plurality of sleeve portions are movably inserted into the tapered groove and the receiving groove and are surrounded to form an accommodating groove, which is used to accommodate the shaft core member. The forming body and the protrusion are arranged at intervals on the side wall of the sleeve portion along the mold opening direction.

6. The insertion mechanism according to claim 5, characterized in that: The shaft core member comprises: A shaft core part, movably arranged in the receiving groove; A plurality of forming parts are arranged at intervals along the circumference of the shaft core part on the side wall of the shaft core part and are arranged one-to-one corresponding to the plurality of sleeve parts. Each of the forming parts extends between two adjacent sleeve parts to enclose and form the forming cavity.

7. The insertion mechanism according to claim 6, characterized in that: A connected retaining groove and a avoiding groove are formed between the side walls of two adjacent sleeve parts. The retaining groove is adjacent to the male mold component relative to the avoiding groove. The retaining groove is adapted to the molding part, and the avoiding groove is clearance-matched with the molding part.

8. The insertion mechanism according to claim 7, characterized in that: The sum of the length of the retaining groove along the mold opening direction and the length of the avoidance groove along the mold opening direction is greater than the sum of the movement distance of the elastic sleeve when the mold is opened and the length of the forming part along the mold opening direction.

9. The insertion mechanism according to claim 6, characterized in that: The accommodating groove comprises a communicating abutting groove and a movable groove, wherein the abutting groove is adjacent to the male mold component relative to the movable groove, the abutting groove is matched with the shaft core portion, and the movable groove is clearance-matched with the shaft core portion.

10. A molding device, characterized in that: include: The entry mechanism as claimed in any one of claims 1 to 9; The molding die comprises a male mold component and a female mold component which are matched with each other. The insertion mechanism is arranged on a side of the female mold component facing the male mold component and is connected to the female mold component.

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