Accelerated ejector pin ejection structure
By designing the accelerated ejection structure, the ejection distance is controlled by using the two-stage rising state and rotating structure, the problem of uneven ejection force in complex structure products is solved, and the efficient and low-cost ejection effect is achieved, adapting to different Die-casting requirements for finished products.
Patent Information
- Application Number
- CN202411208820.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2024-12-17
AI Technical Summary
Traditional primary ejection device is difficult to evenly distribute ejection force in complex structural products, resulting in deformation or damage. The secondary ejection device increases equipment cost and time, making it difficult to meet the ejection demand of different finished products.
Design an accelerated thimble ejection structure, including the first thimble and the second thimble. The second thimble is divided into two stages of rising state, and the ejection distance is controlled through the rotation structure and the oblique angle, and the third thimble achieves uniform speed and accelerated ejection. , reduce equipment costs.
It improves the yield rate and ejection effect, reduces the equipment cost under different finished product die-casting conditions, simplifies the mold replacement process, and reduces the equipment cost.
Smart Images
Figure CN119141742A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of ejector pins, and in particular to a structure for accelerating ejector pin ejection. Background Art
[0002] The traditional one-time ejector has some shortcomings in mold production, which are mainly reflected in the following aspects:
[0003] One-shot ejection usually uses the ejector rod or pneumatic ejector pin inside the mold to eject the molded part from the mold at one time. However, in some products with complex structures, the ejection force may not be evenly distributed, resulting in excessive force on the part, deformation or damage. For products with deep cavities or complex internal structures, one-shot ejection may not be able to completely overcome the clamping force of the product, resulting in the product being unable to be demolded smoothly or having defects after demolding.
[0004] The position of one-time ejection is usually limited to the top or bottom of the molded part. For products that require side ejection, one-time ejection may not meet the requirements, resulting in difficulty in demolding the product.
[0005] When using a one-time ejection device such as an ejector, it is easy to leave ejector marks on the product surface, affecting the appearance quality of the product.
[0006] For products with deep cavities or complex internal structures, secondary ejection can more effectively overcome the clamping force of the product, ensuring smooth demolding of the product with intact quality. However, since different finished products require different ejection effects and the ejection distances are also very different, changing equipment requires a lot of additional equipment costs and takes a lot of time.
[0007] In summary, the secondary ejector device of the mold not only solves the shortcomings of the traditional primary ejector device, but also brings many benefits to mold production. It is one of the indispensable and important technologies in modern mold production. However, the secondary ejector device generally leads to a significant increase in mold costs. Therefore, how to design an accelerated ejector pin ejection structure with low cost and high ejection efficiency has become an urgent problem that technicians in this field need to solve. Summary of the invention
[0008] The object of the present invention is to provide a structure for accelerating ejection of ejector pins to solve the problems raised in the above-mentioned background technology.
[0009] To achieve the above object, the present invention provides the following technical solutions:
[0010] Provided is an accelerating ejector pin ejection structure, comprising an ejection structure and a mold core, wherein the top of the ejector structure is inserted into the mold core, and during the rising process, the finished product in the mold core is ejected, the ejection structure comprises a first ejector pin and a second ejector pin, the first ejector pin is fixed at the lower end of the mold core, the bottom of the second ejector pin is provided with an end, the end is lower than the bottom of the first ejector pin, a rotating structure is provided at the lower ends of the first ejector pin and the second ejector pin, the rotating structure comprises a rotating block and a rotating shaft, the rotating block can be rotated by the rotating shaft, the rotating block is provided with a cavity, the cavity is provided on one side of the rotating shaft, the end of the second ejector pin is inserted into the cavity, the end of the second ejector pin can move in the cavity, the rotating block is provided with a pressing table on the other side of the cavity, the pressing table can contact the bottom of the first ejector pin when the rotating block rises, the first ejector pin applies a downward pressure to the pressing table, and forces the rotating block to rotate.
[0011] Furthermore, a top block is provided at the bottom of the rotating block, and the top block is wrapped around the outside of the rotating block and provides an upward lifting force to the second ejector pin.
[0012] Furthermore, when the ejection structure is in the first state, the ejector block synchronously raises the second ejector pin and the rotating structure until the lower pressing platform of the rotating block contacts the bottom of the first ejector pin, the rotating block is in a non-rotating state, and the bottom surface of the end of the second ejector pin contacts the bottom of the cavity.
[0013] Furthermore, when the ejection structure is in the second state, the pressing platform of the rotating block contacts the bottom of the first ejector pin, the ejection block continues to rise, and the rotating block rotates via the rotating shaft.
[0014] Furthermore, both sides of the end of the second ejector are respectively embedded in the second bevel and the first bevel on both sides of the cavity. When the ejector block rises, the rotating block continues to give the second ejector an upward force, and the angle between the first bevel and the bottom surface of the end is equal to the angle between the second bevel and the top surface of the end. In the second state, when the rotating block rotates to the maximum angle, the first bevel and the second bevel respectively contact the bottom surface and the top surface of the end, restricting the rotating block from continuing to rotate, thereby controlling the height difference between the top surface of the second ejector and the top surface of the first ejector.
[0015] Furthermore, it also includes a third ejector pin, and the third ejector pin cooperates with the second ejector pin to eject the finished product out of the mold core.
[0016] Furthermore, the third ejector pin rises at a uniform speed in the first state and the second state of the ejection structure.
[0017] Furthermore, the second ejector pin rises synchronously with the third ejector pin when the ejection structure is in the first state.
[0018] Furthermore, the second ejector pin rises faster relative to the third ejector pin when the ejection structure is in the second state.
[0019] Furthermore, a lifting structure is provided at the bottom of the ejection structure to provide all the power for the ejection structure to rise in the first state and the second state.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] The present invention provides an accelerating ejector pin ejection structure, wherein the ejection structure is provided with a first ejector pin and a second ejector pin, wherein the first ejector pin is fixed to a mold core, and the second ejector pin is divided into two rising states, wherein in the first state of the ejection structure, the second ejector pin and the third ejector pin rise at the same speed, and a rotating shaft is fixed to the bottom of the second ejector pin, but when the second ejector pin rises to a certain height, one end of the rotating shaft contacts the bottom of the first ejector pin, and the first ejector pin rotates the rotating shaft, and the second ejector pin at the other end of the rotating shaft rises rapidly upward, and relative to the third ejector pin, the second ejector pin rises synchronously in the first state, and rises faster in the second state, and due to the two different rising speeds of the second ejector pin, the yield rate of the ejected finished product is high The ejection effect is greatly improved, and the ejection effect is better. By controlling the angles between the first bevel, the second bevel and the bottom and top surfaces of the second ejector end, and presetting the distance between the first ejector and the second ejector, the height difference between the second ejector and the top surface of the first ejector can be controlled when the rotating block rotates to the maximum angle in the second state. Since the first ejector does not move, the ejection distance of the second ejector is controlled. Under different finished product die-casting conditions, the ejection distance is different. The angles between the first bevel, the second bevel and the bottom and top surfaces of the second ejector end can be changed by replacing the rotating block, which greatly reduces the cost of die-casting of different finished products of the enterprise. The present invention has the characteristics of reducing equipment cost and improving finished product yield, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a three-dimensional structural diagram of the accelerating ejector pin ejection structure of the present invention;
[0023] Figure 2 This is a front view of the accelerating ejector pin ejection structure of the present invention;
[0024] Figure 3 This is a diagram of the ejection structure of the accelerating ejector pin ejection structure of the present invention in the first state;
[0025] Figure 4 This is a diagram showing the ejection structure of the accelerating ejector pin ejection structure of the present invention in the second state;
[0026] Figure 5 This is a rotation structure diagram of the ejector acceleration pin ejection structure of the present invention;
[0027] Figure 6 This is a diagram showing the first state of the rotating block of the ejector acceleration structure of the present invention;
[0028] Figure 7 A second state diagram of the rotating block of the ejector acceleration structure of the present invention;
[0029] Figure 8 for Figure 6 Enlarged view at P in the middle;
[0030] The components in the accompanying drawings are marked as follows: 1. ejection structure; 11. ejector block; 12. first ejector pin; 13. rotating structure; 131. rotating block; 1311. cavity; 1312. slot; 1313. first bevel; 1314. second bevel; 1315. press table; 132. rotating shaft; 14. second ejector pin; 141. end; 15. third ejector pin; 2. mold core; 3. finished product; X1. height difference between the top surfaces of the first ejector pin and the second ejector pin in the second state; X2. distance between the top surfaces of the first ejector pin and the second ejector pin; β1. angle between the first bevel and the bottom surface of the end; β2. angle between the second bevel and the top surface of the end; β3. angle between the top surfaces of the first ejector pin and the second ejector pin in the second state. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0032] See also Figures 1 to 5 , provides an accelerating ejector pin ejection structure, including an ejector structure 1 and a mold core 2, wherein the top of the ejector structure 1 is inserted into the mold core 2, and during the rising process, the finished product 3 in the mold core 2 is ejected, the ejector structure 1 includes a first ejector pin 12 and a second ejector pin 14, the first ejector pin 12 is fixed at the lower end of the mold core 2, the second ejector pin 14 is provided with an end 141 at the bottom, the end 141 is lower than the bottom of the first ejector pin 12, a rotating structure 13 is provided at the lower ends of the first ejector pin 12 and the second ejector pin 14, the rotating structure 13 includes a rotating block 131 and a rotating shaft 132, the rotating block 131 can be rotated by the rotating shaft 132 The rotating block 131 is provided with a cavity 1311, and the cavity 1311 is provided on one side of the rotating shaft 132. The end 141 of the second ejector 14 is inserted into the cavity 1311. A corresponding slot 1312 is provided on the top of the rotating block 131. The end 141 of the second ejector 14 can move in the cavity 1311. The rotating block 131 is provided with a pressing platform 1315 on the other side of the cavity 1311. When the rotating block 131 rises, the pressing platform 1315 can contact the bottom of the first ejector 12. The first ejector 12 applies downward pressure to the pressing platform 1315, forcing the rotating block 131 to rotate.
[0033] Furthermore, a top block 11 is provided at the bottom of the rotating block 131 , and the top block 11 is wrapped around the outside of the rotating block 131 and provides an upward lifting force to the second ejector pin 14 .
[0034] Furthermore, when the ejection structure 1 is in the first state, the ejector block 11 synchronously raises the second ejector pin 14 and the rotating structure 13 until the lower pressing platform 1315 of the rotating block 131 contacts the bottom of the first ejector pin 12, the rotating block 131 is in a non-rotating state, and the bottom surface of the end 141 of the second ejector pin 14 contacts the bottom of the cavity 1311. When the ejection structure 1 is in the second state, the lower pressing platform 1315 of the rotating block 131 contacts the bottom of the first ejector pin 12, the ejector block 11 continues to rise, and the rotating block 131 rotates through the rotating shaft 132. The rotating block 131 is equivalent to a seesaw, the first ejector pin 12 and the second ejector pin 14 are respectively located at the two ends of the rotating block 131, the first ejector pin 12 is fixed on the mold core 2, the second ejector pin 14 rises, and the bottom of the first ejector pin 12 presses one end of the rotating block 131 downward, and the second ejector pin 14 located at the other end of the rotating block 131 will accelerate again at the original rising speed.
[0035] See also Figure 4 and Figure 5 The ends 141 of the second ejector pin 14 are respectively embedded in the second beveled edges 1314 and the first beveled edges 1313 on both sides of the cavity 1311. When the ejector block 11 rises, the rotating block 131 continues to give the second ejector pin 14 an upward force. In the first state, the left side of the end 141 of the second ejector pin 14 contacts the bottom of the cavity 1311 of the rotating block 131, while the right side is suspended. In the second state, the rotating block 131 rotates relative to the end 141, the left side of the end 141 is suspended, and the right side of the end 141 contacts the bottom of the rotating block 131, so that the second ejector pin 14 can obtain the upward power regardless of whether it is in the first state or the second state.
[0036] Furthermore, it also includes a third ejector pin 15 , which cooperates with the second ejector pin 14 to eject the finished product 3 out of the mold core 2 . The third ejector pin 15 may be a combination of multiple ejectors, which are ejectors that rise at a uniform speed and are respectively inserted into various locations of the mold core 2 .
[0037] Furthermore, the third ejector pin 15 rises at a uniform speed in the first state and the second state of the ejection structure 1. The second ejector pin 14 rises synchronously with the third ejector pin 15 in the first state of the ejection structure 1. The second ejector pin 14 rises faster than the third ejector pin 15 in the second state of the ejection structure 1. A lifting structure is provided at the bottom of the ejection structure 1 to provide all the power for the ejection structure 1 to rise in the first state and the second state.
[0038] For details, please refer to the preferred embodiment. Figure 6-Figure 8In the first state, the rotating block 131 just contacts the bottom surface of the first ejector pin 12, and the rotating block 131 does not start to rotate. The top surfaces of the first ejector pin 12 and the second ejector pin 14 are flush, and the angle between the bottom surface of the end surface and the first bevel 1313 is β1, and the angle between the top surface of the end surface and the second bevel 1314 is β2. Preferably, β1=β2. When β1=β2, when the rotating block 131 rotates to the maximum angle, the bottom surface of the end surface and the first bevel 1313 can be fully contacted. Similarly, the top surface of the end surface and the second bevel 1314 are also fully contacted. The second ejector pin 14 can fully receive the ejection force of the rotating block 131, and can also prevent wear at the transition of the bevel caused by uneven force. The distance between the first ejector pin 12 and the second ejector pin 14 is set to X2. When the rotating block 131 rotates to the maximum angle, the first ejector pin 12 passes through the first ejector pin 12. The second ejector pin 14 is accelerated upward by the rotating block 131, and a height difference X1 is formed between the first ejector pin 12 and the second ejector pin 14, and an angle difference β3 is formed between the top surfaces of the first ejector pin 12 and the second ejector pin 14. That is to say, the height difference between the first ejector pin 12 and the second ejector pin 14 in the second state is X1, and the angle between the first ejector pin 12 and the second ejector pin 14 in the second state is β3. By reasoning, β3=, β1=β2. Since β1 and β2 are known in advance, the angle β3 can be calculated, and the distance X2 between the first ejector pin 12 and the second ejector pin 14 is also known. Therefore, the height difference X1 formed between the first ejector pin 12 and the second ejector pin 14 in the second state can be calculated by the angle β3 between the first ejector pin 12 and the second ejector pin 14 in the second state and the distance X2 between the first ejector pin 12 and the second ejector pin 14.
[0039] Through the above calculation, when the top surfaces of the first ejector pin 12 and the second ejector pin 14 are flush in the first state, by controlling the angle β1 between the lower bottom surface of the end surface and the first bevel 1313, the angle β2 between the upper surface of the end surface and the second bevel 1314, and the distance X2 between the first ejector pin 12 and the second ejector pin 14, the height difference X1 between the first ejector pin 12 and the second ejector pin 14 in the second state can be controlled. In actual operation, since different finished products 3 require different ejection distances for die casting, there is no need to change the mold equipment on a large scale. It is only necessary to change the angle β1 between the lower bottom surface of the end surface of the rotating block 131 and the first bevel 1313 and the angle β2 between the upper surface of the end surface and the second bevel 1314, which greatly reduces the equipment cost, and it is convenient to replace the rotating block 131. Each model of the rotating block 131 can correspond to the die casting requirements of different categories of finished products 3.
[0040] When the top surfaces of the first ejector pin 12 and the second ejector pin 14 are not flush in the first state, the calculation process is the same as the above. By presetting the height difference between the top surfaces of the first ejector pin 12 and the second ejector pin 14 and the angle between the top surfaces of the first ejector pin 12 and the second ejector pin 14 in the first state, the distance between the first ejector pin 12 and the second ejector pin 14 is preset. When the rotating block 131 rotates to the maximum angle, the angle change of the top surfaces of the first ejector pin 12 and the second ejector pin 14 in the second state always corresponds to the angle between the bottom surface of the end surface and the first bevel 1313 and the angle between the top surface of the end surface and the second bevel 1314. The angle between the top surfaces of the first ejector pin 12 and the second ejector pin 14 in the second state can be obtained by the angle superposition method. By using the angle calculation formula, the height difference between the top surfaces of the first ejector pin 12 and the second ejector pin 14 in the second state can also be calculated, so as to achieve the purpose of setting the ejection distance of the second ejector pin 14 in advance.
[0041] The present invention provides an accelerating ejector pin ejection structure 1. The ejector structure 1 is provided with a first ejector pin 12 and a second ejector pin 14. The first ejector pin 12 is fixed to a mold core 2. The second ejector pin 14 is divided into two ascending states. When the ejector structure 1 is in the first state, the second ejector pin 14 and the third ejector pin 15 ascend at the same speed. A rotating shaft 132 is fixed to the bottom of the second ejector pin 14. When the second ejector pin 14 ascends to a certain height, one end of the rotating shaft 132 conflicts with the bottom of the first ejector pin 12. The first ejector pin 12 rotates the rotating shaft 132. The second ejector pin 14 at the other end of the rotating shaft 132 rapidly ascends. Compared with the third ejector pin 15, the second ejector pin 14 synchronously ascends in the first state and ascends faster in the second state. Due to the two different ascending speeds of the second ejector pin 14, the finished product can be ejected. The finished product rate of 3 is greatly improved, and the ejection effect is better. By controlling the angle between the first bevel, the second bevel and the bottom and top surfaces of the end 141 of the second ejector 14, the distance between the first ejector 12 and the second ejector 14 is preset, and the height difference between the second ejector 14 and the top surface of the first ejector 12 can be controlled when the rotating block 131 rotates to the maximum angle in the second state. Since the first ejector 12 is stationary, the ejection distance of the second ejector 14 is controlled. Under different die-casting conditions of the finished product 3, the ejection distance is different. The rotating block 131 can be replaced to change the angle between the first bevel, the second bevel and the bottom and top surfaces of the end 141 of the second ejector 14, which greatly reduces the cost of die-casting of different finished products 3 of the enterprise. The present invention has the characteristics of reducing equipment cost and improving the yield rate of the finished product 3.
[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. An accelerating ejector pin ejection structure, comprising an ejection structure (1) and a mold core (2), characterized in that: The top of the ejection structure (1) is inserted into the mold core (2), and during the rising process, the finished product (3) in the mold core (2) is ejected. The ejection structure (1) comprises a first ejector pin (12) and a second ejector pin (14). The first ejector pin (12) is fixed at the lower end of the mold core (2). The bottom of the second ejector pin (14) is provided with an end portion (141), and the end portion (141) is lower than the bottom of the first ejector pin (12). A rotating structure (13) is provided at the lower ends of the first ejector pin (12) and the second ejector pin (14). The rotating structure (13) comprises a rotating block (131) and a rotating shaft (132). The rotating block (131) can be rotated by the rotating shaft (132). The rotating block (131) is provided with a cavity (1311), the cavity (1311) is provided on one side of the rotating shaft (132), the end (141) of the second ejector (14) is inserted into the cavity (1311), the end (141) of the second ejector (14) can move in the cavity (1311), the rotating block (131) is provided with a pressing platform (1315) on the other side of the cavity (1311), the pressing platform (1315) can contact the bottom of the first ejector (12) when the rotating block (131) rises, and the first ejector (12) applies downward pressure to the pressing platform (1315), forcing the rotating block (131) to rotate.
2. The accelerated ejector pin ejection structure according to claim 1, characterized in that: A top block (11) is provided at the bottom of the rotating block (131), and the top block (11) is wrapped around the outside of the rotating block (131) and provides an upward lifting force to the second ejector pin (14).
3. The accelerated ejector pin ejection structure according to claim 2, characterized in that: When the ejection structure (1) is in the first state, the ejection block (11) synchronously raises the second ejector pin (14) and the rotating structure (13) until the lower pressing platform (1315) of the rotating block (131) contacts the bottom of the first ejector pin (12), the rotating block (131) is in a non-rotating state, and the bottom surface of the end (141) of the second ejector pin (14) contacts the bottom of the cavity (1311).
4. The accelerated ejector pin ejection structure according to claim 2, characterized in that: When the ejection structure (1) is in the second state, the lower pressing platform (1315) of the rotating block (131) contacts the bottom of the first ejector pin (12), the ejection block (11) continues to rise, and the rotating block (131) rotates via the rotating shaft (132).
5. The accelerated ejector pin ejection structure according to claim 4, characterized in that: Both sides of the end portion (141) of the second ejector pin (14) are respectively embedded in the second bevel (1314) and the first bevel (1313) on both sides of the cavity (1311), and when the ejector block (11) rises, the rotating block (131) continues to impart an upward force to the second ejector pin (14).
6. The accelerated ejector pin ejection structure according to claim 5, characterized in that: The angle between the first bevel (1313) and the bottom surface of the end portion (141) is equal to the angle between the second bevel (1314) and the top surface of the end portion (141). In the second state, when the rotating block (131) rotates to the maximum angle, the first bevel (1313) and the second bevel (1314) respectively contact the bottom surface and the top surface of the end portion (141), thereby limiting the rotating block (131) from continuing to rotate, thereby controlling the height difference between the top surface of the second ejector pin (14) and the top surface of the first ejector pin (12).
7. The accelerated ejector pin ejection structure according to claim 6, characterized in that: The third ejector pin (15) rises at a uniform speed when the ejection structure (1) is in the first state or the second state.
8. The accelerated ejector pin ejection structure according to claim 7, characterized in that: The second ejector pin (14) rises synchronously with the third ejector pin (15) when the ejection structure (1) is in the first state.
9. The accelerated ejector pin ejection structure according to claim 7, characterized in that: The second ejector pin (14) rises faster relative to the third ejector pin (15) when the ejection structure (1) is in the second state.
10. The accelerating ejector pin ejection structure according to any one of claims 1 to 9, characterized in that: A lifting structure is provided at the bottom of the ejection structure (1) to provide all the power for the ejection structure (1) to rise in the first state and the second state.