Bevel gear demolding ejection mechanism

Abstract

The utility model relates to a bevel gear demolding ejection mechanism which comprises an upper mold assembly and a lower mold assembly, the upper mold assembly is arranged at the upper end of the lower mold assembly, and a mold cavity for injection molding of a bevel gear is formed between the upper mold assembly and the lower mold assembly; a first insert and a second insert are arranged in the lower die assembly, the section of the second insert is of an annular structure, the first insert is arranged in the second insert, and an inner helical tooth structure used for being correspondingly connected with a helical gear is arranged on the inner side of the upper end of the second insert. A rotating assembly is arranged at the lower end of the second insert, is connected with the second insert and is used for driving the second insert to rotate; and an ejector pin assembly is arranged at the lower end of the rotating assembly, penetrates through the rotating assembly and the second insert, communicates with the mold cavity and is used for driving the rotating assembly to rotate and ejecting out the bevel gear in the mold cavity. By the adoption of the structure, automatic rotating demolding of the bevel gear is completed, the injection molding efficiency and demolding efficiency of the bevel gear are guaranteed, and the production efficiency of products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear mould technical field, concretely relates to a helical gear demolding ejection mechanism. BACKGROUND

[0002] The helical gear product of injection molding needs to carry out spiral ejection demolding, and the prior art adopts gear, rack driving gear rotation cooperation external hydraulic core pulling machine to carry out spiral motion ejection demolding, due to the structure of rack, gear and hydraulic core pulling machine is complex and high cost, and the mould of the hydraulic core pulling machine is big, and the mould is thick, and the processing cost of the mould is high, and the processing mould technology is complex, and the oil pollution caused when disassembling, resulting in the high maintenance cost of mould production operation, the demolding efficiency is low, and the environment is easily polluted.

[0003] Therefore, there is an urgent need to provide a helical gear demolding ejection mechanism to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model discloses a helical gear demolding ejection mechanism, which overcomes the deficiencies and defects of the prior art, realizes automatic rotation demolding of the helical gear, ensures the injection efficiency and demolding efficiency of the helical gear, and improves the production efficiency of the product.

[0005] The utility model discloses a helical gear demolding ejection mechanism, which overcomes the deficiencies and defects of the prior art, realizes automatic rotation demolding of the helical gear, ensures the injection efficiency and demolding efficiency of the helical gear, and improves the production efficiency of the product.

[0006] A helical gear demolding ejection mechanism, characterized by comprising an upper die assembly and a lower die assembly, the upper die assembly is arranged on the upper end of the lower die assembly, and a mold cavity for helical gear injection molding is formed between the upper die assembly and the lower die assembly; a first insert and a second insert are arranged in the lower die assembly, the second insert is arranged in a ring structure, the first insert is arranged in the second insert, and an inner helical tooth structure is arranged on the inner side of the upper end of the second insert for corresponding connection with the helical gear; a rotating assembly is arranged on the lower end of the second insert, the rotating assembly is connected with the second insert to drive the second insert to rotate; a ejector pin assembly is arranged on the lower end of the rotating assembly, the ejector pin assembly is arranged in the rotating assembly and the second insert, and is communicated with the mold cavity to drive the rotating assembly to rotate and eject the helical gear in the mold cavity.

[0007] Optionally, the ejector pin assembly comprises an ejector pin and an ejector pin plate, the ejector pin is arranged in the rotating assembly and the second insert, the upper end of the ejector pin plate is connected with the lower end of the ejector pin, and the lower end of the ejector pin plate is provided with a lifting device to drive the ejector pin plate to move up and down.

[0008] Optionally, the upper mold assembly includes an upper mold core, the lower mold assembly includes a middle mold core and a lower mold core, the mold cavity is disposed between the upper mold core and the middle mold core, the first insert, the second insert and the rotating assembly are all disposed in the middle mold core, and the ejector pin assembly passes through the upper mold core, the middle mold core and the lower mold core.

[0009] Optionally, the rotating assembly includes a one-way bearing and an inner device, the inner device being disposed at the upper end of the one-way bearing, and the internal helical gear structure being disposed above the inner device for meshing with the helical gear.

[0010] Optionally, the helical gear ejection mechanism further includes a third insert, which is disposed between the second insert and the first insert, and the third insert is provided with a guide pin hole that penetrates the upper and lower end faces, and the ejector pin is movably inserted in the guide pin hole.

[0011] Optionally, the ejector pin is provided in multiple sets, and the guide pin holes on the third insert are also provided in multiple sets.

[0012] Optionally, the second insert is surrounded by a molded part, the molded part is provided with multiple sets of fasteners, and a positioning member is provided above the molded part, the positioning member being used to snap into the fasteners on the molded part.

[0013] Optionally, the upper mold assembly further includes an opening assembly, which is located above the mold cavity and can reciprocate in a direction that approaches or moves away from the mold cavity.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, the upper mold assembly is located above the lower mold assembly, and a mold cavity for injection molding a helical gear is formed between the upper and lower mold assemblies. The lower mold assembly contains a first insert and a second insert. The second insert has an annular cross-section, and the first insert is located inside the second insert, i.e., the second insert surrounds the outside of the first insert. The inner side of the second insert has an internal helical gear structure for corresponding connection with the helical gear. The injection-molded helical gear is located at the upper end of the internal helical gear structure and meshes with it. The lower end of the second insert has a rotating assembly connected to the second insert, used to drive the second insert to rotate, i.e., to drive the internal helical gear structure to rotate, thereby driving the injection-molded helical gear. The rotating assembly is equipped with an ejector pin assembly at its lower end. This ejector pin assembly passes through the rotating assembly and the second insert, and communicates with the mold cavity. It is used to drive the rotating assembly to rotate and to eject the helical gear inside the mold cavity. While the ejector pin assembly is lifting, it drives the rotating assembly to rotate, thereby driving the second insert and the internal helical gear structure to rotate. The helical gear meshing with it rotates accordingly. At the same time, under the lifting of the ejector pin assembly, the helical gear automatically rotates and demolds, and is ejected from the mold, completing the demolding. Automatic demolding reduces the injection molding cycle. Through the above-mentioned component settings, the automatic rotation and demolding of the helical gear is completed, ensuring the injection molding efficiency and demolding efficiency of the helical gear, and improving the production efficiency of the product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 A magnified view of a section AA in the middle.

[0018] Figure 3 This is a top view of the rotating component in this utility model.

[0019] Figure 4 This is a schematic diagram of another embodiment of the rotating component in this utility model.

[0020] The above figures include the following reference numerals:

[0021] 1. Upper mold assembly; 11. Upper mold core; 2. Lower mold assembly; 21. Mold cavity; 22. First insert; 23. Second insert; 231. Internal helical tooth structure; 24. Third insert; 241. Guide pin hole; 25. Middle mold core; 26. Lower mold core; 31. One-way bearing; 32. Inner side device; 41. Ejector pin; 42. Ejector plate; 43. Lifting device; 5. Opening assembly. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. This utility model provides a readily assembleable and stable atomizing core structure.

[0024] This utility model proposes a helical gear demolding and ejection mechanism.

[0025] Reference Figures 1 to 4 In this embodiment, the system includes an upper mold assembly 1 and a lower mold assembly 2. The upper mold assembly 1 is located at the upper end of the lower mold assembly 2, and a mold cavity 21 for injection molding a helical gear is formed between the upper mold assembly 1 and the lower mold assembly 2. The lower mold assembly 2 is provided with a first insert 22 and a second insert 23. The second insert 23 has an annular cross-section. The first insert 22 is located inside the second insert 23, and the inner side of the upper end of the second insert 23 is provided with an internal helical tooth structure 231 for corresponding connection with the helical gear. The lower end of the second insert 23 is provided with a rotating assembly, which is connected to the second insert 23 to drive the second insert 23 to rotate. The lower end of the rotating assembly is provided with an ejector assembly, which passes through the rotating assembly and the second insert 23 and communicates with the mold cavity 21 to drive the rotating assembly to rotate and eject the helical gear in the mold cavity 21.

[0026] Optionally, in this embodiment, the helical gear ejection mechanism includes an upper mold assembly 1, a lower mold assembly 2, a first insert 22, a second insert 23, a rotating assembly, and an ejector pin assembly. The upper mold assembly 1 is located above the lower mold assembly 2, and a mold cavity 21 for injection molding the helical gear is formed between the upper mold assembly 1 and the lower mold assembly 2. The upper end of the mold cavity 21 is provided with an injection runner connected thereto for injection molding the helical gear within the mold cavity 21. The lower mold assembly 2 is provided with the first insert 22 and the second insert 23. The second insert 23 has a ring-shaped cross-section, and the first insert 22 is located inside the second insert 23, that is, the second insert 23 surrounds the outside of the first insert 22. The inner side of the second insert 23 is provided with an internal helical gear structure 231 for corresponding connection with the helical gear. The injection-molded helical gear is located at the upper end of the internal helical gear structure 231 and meshes with the internal helical gear structure 231. The lower end of the second insert 23 is provided with a rotating component, which is connected to the second insert 23 to drive the second insert 23 to rotate, that is, to drive the internal helical gear structure 231 to rotate. The rotating assembly moves, thereby driving the helical gear after injection molding to rotate. The lower end of the rotating assembly is provided with an ejector assembly, which passes through the rotating assembly and the second insert 23 and communicates with the mold cavity 21. It is used to drive the rotating assembly to rotate and eject the helical gear in the mold cavity 21. That is, when the helical gear in the mold cavity 21 is injected, the ejector assembly lifts and drives the rotating assembly to rotate, thereby driving the second insert 23 and the internal helical gear structure 231 to rotate. The helical gear meshing with it rotates accordingly. At the same time, under the lifting of the ejector assembly, the helical gear automatically rotates and demolds and is ejected from the mold, completing the demolding. Automatic demolding reduces the injection molding cycle. Compared with the prior art, it is not necessary to set up a hydraulic core-pulling machine outside the mold to cooperate with the internal structure to complete the demolding of the helical gear. It avoids oil pollution caused by the large size and complex structure of the hydraulic core-pulling machine mold blank during disassembly and assembly. Through the above-mentioned components, the automatic rotation demolding of the helical gear is completed, ensuring the injection molding efficiency and demolding efficiency of the helical gear and improving the production efficiency of the product.

[0027] In this embodiment, the ejector assembly includes an ejector pin 41 and an ejector plate 42. The ejector pin passes through the rotating assembly and the second insert 23. That is, after the ejector pin 41 passes through the rotating assembly and the second insert 23, it communicates with the mold cavity 21. The product is ejected by lifting the ejector pin 41. The upper end of the ejector plate 42 is connected to the lower end of the ejector pin. The lower end of the ejector plate 42 is provided with a lifting device 43. The lifting device 43 is used to drive the ejector plate 42 to move up and down, thereby driving the ejector pin 41 to lift and complete the lifting and demolding of the helical gear.

[0028] In this embodiment, the upper mold assembly 1 includes an upper mold core 11, and the lower mold assembly 2 includes a middle mold core 25 and a lower mold core 26. The mold cavity 21 is disposed between the upper mold core 11 and the middle mold core 25, and the first insert 22, the second insert 23 and the rotating assembly are all disposed in the middle mold core 25, and the ejector pin assembly passes through the upper mold core 11, the middle mold core 25 and the lower mold core 26.

[0029] In this embodiment, the rotating assembly includes a one-way bearing 31 and an inner device 32, wherein the inner device 32 is located at the upper end of the one-way bearing 31, and the inner helical gear structure 231 is located above the inner device 32 for meshing with the helical gear. The one-way bearing 31 has a one-way locking effect to prevent reverse rotation, thereby ensuring the stable operation of the equipment. It also has a simple structure, high load-bearing capacity and low friction.

[0030] In this embodiment, the gear ejection mechanism further includes a third insert 24, which is disposed between the first insert 22 and the second insert 23. The third insert 24 has guide pin holes 241 that penetrate the upper and lower end faces. The ejector pin is movably inserted through the guide pin holes 241. The guide pin holes 241 are used to limit the lifting path of the ejector pin and prevent the ejector pin from deviating during lifting, thereby causing product damage. Furthermore, in this embodiment, there are multiple sets of ejector pins, and the guide pin holes 241 on the third insert 24 are also provided in multiple sets. Through the arrangement of multiple sets of guide pin holes 241 and ejector pins, multiple positions of the helical gear can be lifted simultaneously, so that the helical gear is subjected to uniform force and prevents product damage caused by uneven force.

[0031] In this embodiment, the second insert 23 is surrounded by a mold core, which has multiple sets of fasteners and a positioning member above it. The positioning member is used to engage with the fasteners on the mold core to limit the rotation of the second insert 23. Furthermore, in this embodiment, the upper mold assembly 1 also includes an opening assembly 5, which is located above the mold cavity 21 and can reciprocate in a direction close to or away from the mold cavity 21 to fulfill the opening requirements at the top of the product.

[0032] The embodiments described above are merely illustrative of the implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A helical gear ejection mechanism, characterized in that, The device includes an upper mold assembly and a lower mold assembly. The upper mold assembly is located above the lower mold assembly, and a mold cavity is formed between the upper mold assembly and the lower mold assembly for injection molding a helical gear. The lower mold assembly has a first insert and a second insert. The second insert has an annular cross-section, and the first insert is located inside the second insert. The upper inner side of the second insert has an internal helical tooth structure for corresponding connection with the helical gear. The lower end of the second insert has a rotating assembly connected to the second insert to drive the second insert to rotate. The lower end of the rotating assembly has an ejector assembly that passes through the rotating assembly and the second insert and communicates with the mold cavity to drive the rotating assembly to rotate and eject the helical gear inside the mold cavity.

2. The helical gear ejection mechanism according to claim 1, characterized in that, The ejector pin assembly includes an ejector pin and an ejector pin plate. The ejector pin passes through the rotating assembly and the second insert. The upper end of the ejector pin plate is connected to the lower end of the ejector pin, and the lower end of the ejector pin plate is provided with a lifting device to drive the ejector pin plate to move up and down.

3. The helical gear ejection mechanism according to claim 2, characterized in that, The upper mold assembly includes an upper mold core, the lower mold assembly includes a middle mold core and a lower mold core, the mold cavity is disposed between the upper mold core and the middle mold core, the first insert, the second insert and the rotating assembly are all disposed in the middle mold core, and the ejector pin assembly passes through the upper mold core, the middle mold core and the lower mold core.

4. The helical gear ejection mechanism according to claim 1, characterized in that, The rotating assembly includes a one-way bearing and an inner device. The inner device is located at the upper end of the one-way bearing, and the internal helical gear structure is located above the inner device for meshing with the helical gear.

5. A helical gear ejection mechanism according to claim 2, characterized in that, The helical gear ejection mechanism further includes a third insert, which is located between the second insert and the first insert. The third insert has a guide pin hole that passes through the upper and lower end faces, and the ejector pin is movably inserted through the guide pin hole.

6. A helical gear ejection mechanism according to claim 5, characterized in that, The ejector pins are provided in multiple sets, and the guide pin holes on the third insert are also provided in multiple sets.

7. The helical gear ejection mechanism according to claim 1, characterized in that, The second insert is surrounded by a molded part, which has multiple sets of fasteners. A positioning element is provided above the molded part, which is used to snap into the fasteners on the molded part.

8. The helical gear ejection mechanism according to claim 1, characterized in that, The upper mold assembly also includes an opening assembly, which is located above the mold cavity and can reciprocate in a direction that approaches or moves away from the mold cavity.

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