Bevel gear demolding ejection mechanism

Abstract

The bevel gear demolding ejection mechanism 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 used 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 invention relates to the technical field of gear moulds, and in particular to a demoulding and ejecting mechanism for a helical gear. Background Art

[0002] Injection molded helical gear products need to be demoulded by spiral ejection. The existing technology uses gears and racks to drive the gears to rotate and cooperate with an external hydraulic core-pulling machine to perform spiral motion ejection and demoulding. Due to the complex structure of the rack, gears and hydraulic core-pulling machine, the cost is high, and the mold base of the hydraulic core-pulling machine is large and thick, the mold processing cost is high, the mold processing process is complicated, and the oil pollution caused by disassembly and assembly leads to high maintenance costs for mold production and operation, low demoulding efficiency, and easy pollution to the environment.

[0003] Therefore, there is an urgent need to provide a helical gear demoulding and ejection mechanism to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and defects of the prior art and provide a helical gear demoulding and ejection mechanism, which completes the automatic rotation demoulding of the helical gear, ensures the injection molding efficiency and demoulding efficiency of the helical gear, and improves the production efficiency of the product.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A demoulding and ejecting mechanism for a helical gear, characterized in that it 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 the helical 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 mold assembly, the cross-section of the second insert is an annular structure, the first insert is arranged in the second insert, and the inner side of the upper end of the second insert is provided with an internal helical tooth structure for corresponding connection with the helical gear; a rotating assembly is provided at the lower end of the second insert, and the rotating assembly is connected to the second insert to drive the second insert to rotate; an ejector pin assembly is provided at the lower end of the rotating assembly, and the ejector pin assembly penetrates the rotating assembly and the second insert, and is connected to the mold cavity, so as to drive the rotating assembly to rotate and eject the helical gear in the mold cavity.

[0007] Optionally, the ejector assembly includes an ejector and an ejector plate, the ejector is inserted into the rotating assembly and the second insert, the upper end of the ejector plate is connected to the lower end of the ejector, and a lifting device is provided at the lower end of the ejector plate to drive the ejector 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 arranged between the upper mold core and the middle mold core, the first insert, the second insert and the rotating assembly are all arranged in the middle mold core, and the ejector pin assembly is passed 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 is arranged at the upper end of the one-way bearing, and the inner helical gear structure is arranged above the inner device to be meshed and connected with the helical gear.

[0010] Optionally, the bevel gear demoulding and ejection mechanism further comprises a third insert, wherein the third insert is arranged between the second insert and the first insert, and the third insert is provided with a guide pin hole penetrating the upper and lower end surfaces, and the ejector pin is movably arranged in the guide pin hole.

[0011] Optionally, the ejector pins are provided in a plurality of groups, and the guide pin holes on the third insert are also provided in a plurality of groups accordingly.

[0012] Optionally, a mold body is covered on the outer side of the second insert, a plurality of buckle positions are provided on the mold body, and a positioning piece is provided above the mold body, and the positioning piece is used for buckling connection with the buckle positions on the mold body.

[0013] Optionally, the upper mold assembly further includes a hole opening assembly, which is disposed above the mold cavity and can reciprocate in a direction approaching or moving away from the mold cavity.

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

[0015] In the present invention, the upper mold assembly is arranged at the upper end of the lower mold assembly, and a mold cavity for injection molding of the helical gear is formed between the upper mold assembly and the lower mold assembly; the lower mold assembly is provided with a first insert and a second insert, the cross-section of the second insert is annular, and the first insert is arranged in the second insert, that is, the second insert is arranged around the outside of the first insert, and the inner side of the second insert is provided with an internal helical gear structure for corresponding connection with the helical gear, the injection molded helical gear is arranged at the upper end of the internal helical gear structure and meshed with the internal helical gear structure, and the lower end of the second insert is provided with a rotating assembly, which is connected to the second insert to drive the second insert to rotate, that is, to drive the internal helical gear structure to rotate, thereby driving the injection molded helical gear to rotate. The ejector assembly is provided at the lower end of the rotating assembly, and the ejector assembly is penetrated through the rotating assembly and the second insert, and is communicated with the mold cavity to drive the rotating assembly to rotate and eject the bevel gear in the mold cavity. When the ejector assembly performs the lifting movement, it drives the rotating assembly to rotate, thereby driving the second insert and the inner bevel gear structure to rotate, and the bevel gear meshing with it rotates accordingly. At the same time, under the lifting of the ejector assembly, the bevel gear automatically rotates to demould and is ejected out of the mold to complete the demoulding. The automatic demoulding reduces the injection molding cycle. Through the arrangement of the above components, the automatic rotation demoulding of the bevel gear is completed, the injection molding efficiency and demoulding efficiency of the bevel gear are guaranteed, and the production efficiency of the product is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 for Figure 1 A partial enlarged view of the AA point in the middle.

[0018] Figure 3 It is a top view of the rotating assembly in the present invention.

[0019] Figure 4 FIG. 2 is a schematic diagram of another embodiment of the rotating assembly in the present invention.

[0020] The above drawings 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. Inner bevel gear structure, 24. Third insert, 241. Guide pin hole, 25. Middle mold core, 26. Lower mold core, 31. One-way bearing, 32. Inner device, 41. Ejector pin, 42. Ejector pin plate, 43. Lifting device, 5. Opening assembly. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The technical solution of the present invention proposes an atomizer core structure that is easy to assemble and has stable performance.

[0024] The technical solution of the present invention proposes a helical gear demoulding and ejecting mechanism.

[0025] Reference Figures 1 to 4 In this embodiment, it includes an upper mold assembly 1 and a lower mold assembly 2, the upper mold assembly 1 is arranged at the upper end of the lower mold assembly 2, and a mold cavity 21 for injection molding of 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 cross-section of the second insert 23 is an annular structure, the first insert 22 is arranged in 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, the rotating assembly is connected to the second insert 23, and is used to drive the second insert 23 to rotate; the lower end of the rotating assembly is provided with an ejector assembly, the ejector assembly is penetrated by the rotating assembly and the second insert 23, and is connected with the mold cavity 21, so as 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 demoulding and 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 assembly, wherein the upper mold assembly 1 is arranged at the upper end of the lower mold assembly 2, and a mold cavity 21 for injection molding of the helical gear is formed between the upper mold assembly 1 and the lower mold assembly 2, and an injection flow channel connected to the upper end of the mold cavity 21 is provided for injection molding the helical gear in the mold cavity 21; the lower mold assembly 2 is provided with a first insert 22 and a second insert 23, and the second insert The cross section of the first insert 22 is annular, and the first insert 22 is arranged in the second insert 23, that is, the second insert 23 is arranged around the outside of the first insert 22, and the inner side of the second insert 23 is provided with an inner bevel gear structure 231 for correspondingly connecting with the bevel gear, the injection molded bevel gear is arranged at the upper end of the inner bevel gear structure 231 and meshingly connected with the inner bevel gear structure 231, and 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, that is, drive the inner bevel gear structure 231 to rotate. The lower end of the rotating assembly is provided with an ejector assembly, which is inserted into the rotating assembly and the second insert 23 and is connected to the mold cavity 21 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 performs a lifting movement while driving the rotating assembly to rotate, thereby driving the second insert 23 and the internal helical gear structure 231 to rotate, and the helical gear meshing with it rotates accordingly. At the same time, under the lifting of the ejector assembly, the helical gear is automatically rotated and demolded and ejected out of the mold to complete the demolding. The automatic demolding reduces the injection molding cycle. Compared with the prior art, there is no need to set a hydraulic core drawing machine outside the mold to cooperate with the internal structure to complete the demolding of the helical gear, so as to avoid oil pollution caused by the large mold base and complex structure of the hydraulic core drawing machine during disassembly and assembly. Through the setting of the above-mentioned components, the automatic rotation demolding of the helical gear is completed, the injection molding efficiency and demolding efficiency of the helical gear are guaranteed, and the production efficiency of the product is improved.

[0027] In this embodiment, the ejector assembly includes an ejector 41 and an ejector plate 42, wherein the ejector is inserted through the rotating assembly and the second insert 23, wherein the ejector is inserted through the rotating assembly and the second insert 23, that is, the ejector 41 is connected with the mold cavity 21 after being inserted through the rotating assembly and the second insert 23, and the demoulding and ejection of the product is completed by the lifting of the ejector 41; the upper end of the ejector plate 42 is connected to the lower end of the ejector, and the lower end of the ejector plate 42 is provided with a lifting device 43, and the lifting device 43 is used to drive the ejector plate 42 to move up and down, thereby driving the ejector 41 to be lifted, thereby completing the lifting and demoulding of the bevel 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 arranged 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 arranged in the middle mold core 25, and the ejector pin assembly is passed 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 arranged at the upper end of the one-way bearing 31, and the inner bevel gear structure 231 is arranged above the inner device 32 to engage with the bevel gear. The one-way bearing 31 has a one-way locking effect to prevent reverse rotation, thereby ensuring the stable operation of the equipment, and has a simple structure, high load-bearing capacity and low friction.

[0030] In the present embodiment, the gear demoulding and ejecting mechanism also includes a third insert 24, which is arranged between the first insert 22 and the second insert 23, and the third insert 24 is provided with a guide pin hole 241 that passes through the upper and lower end surfaces, and the ejector pin is movably inserted into the guide pin hole 241. The guide pin hole 241 is provided to limit the ejection path of the ejector pin to prevent the ejector pin from shifting during the ejection, thereby causing product damage; further, in the present embodiment, the ejector pin is provided with a plurality of groups, and the guide pin holes 241 on the third insert 24 are also correspondingly provided with a plurality of groups. Through the provision of a plurality of groups of guide pin holes 241 and ejector pins, multiple positions of the bevel gear can be simultaneously lifted, so that the bevel gear is subjected to uniform force as a whole, thereby preventing product damage caused by uneven force.

[0031] In the present embodiment, the outer side of the second insert 23 is surrounded by a mold body, and a plurality of buckle positions are provided on the mold body, and a positioning piece is provided above the mold body, and the positioning piece is used to be buckled and connected with the buckle positions on the mold body to limit the rotation of the second insert 23; further, in the present embodiment, the upper mold assembly 1 also includes a hole opening assembly 5, which is arranged above the mold cavity 21 and can reciprocate in a direction close to or away from the mold cavity 21, thereby completing the hole opening requirement for the upper end of the product.

[0032] The above-mentioned embodiments only express the implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A helical gear demoulding and ejection mechanism, characterized in that: It comprises an upper mold assembly and a lower mold assembly, wherein the upper mold assembly is arranged at the upper end of the lower mold assembly, and a mold cavity for injection molding of a helical gear is formed between the upper mold assembly and the lower mold assembly; the lower mold assembly is provided with a first insert and a second insert, the cross section of the second insert is annular, the first insert is arranged in the second insert, and the inner side of the upper end of the second insert is provided with an internal helical tooth structure corresponding to the helical gear; the lower end of the second insert is provided with a rotating assembly, and the rotating assembly is connected to the second insert to drive the second insert to rotate; the lower end of the rotating assembly is provided with an ejector assembly, the ejector assembly penetrates the rotating assembly and the second insert, and is connected with the mold cavity, so as to drive the rotating assembly to rotate and eject the helical gear in the mold cavity.

2. A helical gear demoulding and ejection mechanism according to claim 1, characterized in that: The ejector assembly includes an ejector and an ejector plate. The ejector is inserted into the rotating assembly and the second insert. The upper end of the ejector plate is connected to the lower end of the ejector. A lifting device is provided at the lower end of the ejector plate to drive the ejector plate to move up and down.

3. A helical gear demoulding and 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 arranged between the upper mold core and the middle mold core, the first insert, the second insert and the rotating assembly are all arranged in the middle mold core, and the ejector pin assembly is penetrated through the upper mold core, the middle mold core and the lower mold core.

4. The helical gear demoulding and ejection mechanism according to claim 1, characterized in that: The rotating assembly includes a one-way bearing and an inner device, wherein the inner device is arranged at the upper end of the one-way bearing, and the inner helical gear structure is arranged above the inner device to be meshed and connected with the helical gear.

5. The helical gear demoulding and ejection mechanism according to claim 2, characterized in that: The helical gear demoulding and ejecting mechanism also includes a third insert, which is arranged between the second insert and the first insert, and the third insert is provided with a guide pin hole penetrating the upper and lower end surfaces, and the ejector pin is movably inserted into the guide pin hole.

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

7. The helical gear demoulding and ejection mechanism according to claim 1, characterized in that: The outer side of the second insert is covered with a mold body, and the mold body is provided with a plurality of buckle positions. A positioning piece is provided above the mold body, and the positioning piece is used for buckling connection with the buckle positions on the mold body.

8. The helical gear demoulding and ejection mechanism according to claim 1, characterized in that: The upper mold assembly also includes a hole opening assembly, which is arranged above the mold cavity and can reciprocate in a direction approaching or away from the mold cavity.

Images