Ejection mechanism for demolding stamping part

Abstract

The ejection mechanism comprises a bedplate, an ejection plate is fixed to the edge side of the top of the bedplate through stand columns, an air cylinder is fixed to the middle of the ejection plate in a penetrating mode, an upper mold is fixed to the lower end of the air cylinder, U-shaped plates are fixed to the two sides of the top of the bedplate, and the U-shaped plates are fixed to the two sides of the top of the bedplate. According to the ejection mechanism for demolding of the stamping part, a handle is rotated, and then the handle drives a lead screw and an inner circular plate to rotate, due to the fact that a supporting block is in threaded connection with the lead screw, the supporting block is in threaded connection with the lead screw, the upper die is fixed to the outer wall of the rotary shaft, and the lower die is fixed to the outer wall of the rotary shaft; therefore, the screw rod pushes the inner circular plate and the movable plate to move upwards, so that the spring is compressed, the elastic force of the spring is increased, the spring can generate original elastic force to eject out a formed plate, the spring does not need to be replaced and can be continuously used, the trouble of replacing the spring is reduced, the working efficiency is improved, and the replacement cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mold demolding technology, specifically an ejection mechanism for demolding stamped parts. Background Technology

[0002] In existing ejection mechanisms for stamped parts, springs, as common elastic elements, are widely used to provide ejection and reset power. However, during long-term use, springs inevitably experience spring force attenuation due to frequent alternating loads, environmental factors (such as temperature changes and corrosive gas corrosion), and material fatigue. When the spring force decreases, the ejection force of the ejection mechanism is insufficient, failing to effectively eject the stamped part from the mold, resulting in demolding failure.

[0003] To address the aforementioned issues, some existing technologies employ spring replacement to maintain the performance of the ejection mechanism. However, frequent spring replacement not only increases production costs but also extends downtime, impacting production schedules.

[0004] To address the aforementioned issues, there is an urgent need for innovative design of the ejection mechanism for demolding existing stamped parts. Utility Model Content

[0005] The purpose of this invention is to provide an ejection mechanism for demolding stamped parts, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an ejection mechanism for demolding stamped parts, comprising a platform, a top plate fixed to the top side of the platform via a column, a cylinder fixed through the middle of the top plate, an upper mold fixed to the lower end of the cylinder, U-shaped plates fixed to both sides of the top of the platform, a rotating shaft rotatably mounted inside the U-shaped plate via a bearing, a lower mold fixed to the outer wall of the rotating shaft, and an ejection mechanism provided inside the platform.

[0007] Preferably, the ejection mechanism includes a groove, the table plate has a groove inside, the lower end of an ejector rod is movably installed inside the groove, the upper end of the ejector rod passes through the top of the table plate and abuts against the bottom of the lower mold, and the ejector rod is movably connected to the table plate, the bottom of the table plate is fixed with a support block by screws, a lead screw is installed through the support block, a movable plate is movably arranged inside the groove, an inner circular plate is installed inside the movable plate, the upper end of the lead screw passes through the bottom of the movable plate and is fixedly connected to the center of the bottom of the inner circular plate, the bottom of the ejector rod abuts against the upper end of a spring, and the lower end of the spring abuts against the top of the movable plate, and a handle is fixed to the lower end of the lead screw.

[0008] Preferably, the upper end of the push rod is designed as a hemispherical structure, and the lower end of the push rod is designed as a rectangular structure, with the outer side of the lower end of the push rod fitting against the inner side of the groove.

[0009] Preferably, the outer side of the lead screw and the inner side of the support block are both provided with threads, and the lead screw and the support block are threadedly connected.

[0010] Preferably, the outer side of the inner circular plate is in contact with the inner side of the movable plate, and the inner circular plate and the movable plate are rotatably connected, and the lead screw and the movable plate are rotatably connected.

[0011] Preferably, the upper end of the support block has a rectangular structure, and the upper end of the support block is engaged with the groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the ejection mechanism for demolding stamped parts involves rotating the handle, which then drives the lead screw and inner circular plate to rotate. Since the support block and the lead screw are threadedly connected, the lead screw pushes the inner circular plate and the movable plate upward, causing the spring to compress and thus increasing the spring force. This allows the spring to generate its original spring force to eject the formed sheet metal, eliminating the need to replace the spring and allowing it to continue to be used. This reduces the hassle of replacing springs, improves work efficiency, and lowers replacement costs. Attached Figure Description

[0013] Figure 1 This is a frontal cross-sectional view of the present invention.

[0014] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0015] Figure 3 This is a schematic diagram of the structure of this utility model after mold closing;

[0016] Figure 4 This is a side view of the structure of this utility model;

[0017] Figure 5 This is a top view of the top rod structure of this utility model;

[0018] Figure 6 This is a bottom view cross-sectional structural diagram of the movable plate of this utility model.

[0019] In the diagram: 1. Platform; 2. Column; 3. Top plate; 4. Cylinder; 5. Upper mold; 6. U-shaped plate; 7. Rotating shaft; 8. Lower mold; 9. Groove; 10. Push rod; 11. Spring; 12. Support block; 13. Lead screw; 14. Inner circular plate; 15. Movable plate; 16. Handle. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-6 This utility model provides a technical solution: an ejection mechanism for demolding stamped parts, including a table plate 1, a top plate 3 fixed to the top side of the table plate 1 by a column 2, a cylinder 4 fixed through the middle of the top plate 3, an upper mold 5 fixed to the lower end of the cylinder 4, U-shaped plates 6 fixed to both sides of the top of the table plate 1, a rotating shaft 7 rotatably mounted inside the U-shaped plate 6 by a bearing, a lower mold 8 fixed to the outer wall of the rotating shaft 7, and an ejection mechanism provided inside the table plate 1.

[0022] The ejection mechanism includes a groove 9. The table plate 1 has a groove 9 inside. The lower end of the ejector rod 10 is movably installed inside the groove 9. The upper end of the ejector rod 10 passes through the top of the table plate 1 and abuts against the bottom of the lower mold 8. The ejector rod 10 is movably connected to the table plate 1. The bottom of the table plate 1 is fixed with a support block 12 by screws. A lead screw 13 is installed through the support block 12. A movable plate 15 is movably arranged inside the groove 9. An inner circular plate 14 is installed inside the movable plate 15. The upper end of the lead screw 13 passes through the bottom of the movable plate 15 and is fixedly connected to the center of the bottom of the inner circular plate 14. The bottom of the ejector rod 10 abuts against the upper end of the spring 11, and the lower end of the spring 11 abuts against the top of the movable plate 15. A handle 16 is fixed to the lower end of the lead screw 13. The upper end of the ejector rod 10 is designed as a hemispherical structure, and the lower end of the ejector rod 10 is designed as a rectangular structure. The outer side of the lower end of the ejector rod 10 fits against the inner side of the groove 9.

[0023] Both the outer side of the lead screw 13 and the inner side of the support block 12 are provided with threads, and the lead screw 13 and the support block 12 are threadedly connected, which ensures that the lead screw 13 can move up and down on the support block 12 when it rotates.

[0024] The outer side of the inner circular plate 14 is in contact with the inner side of the movable plate 15, and the inner circular plate 14 and the movable plate 15 are rotatably connected. The lead screw 13 is also rotatably connected to the movable plate 15, ensuring that the lead screw 13 can drive the inner circular plate 14 to rotate inside the movable plate 15. Thus, the lead screw 13 can drive the movable plate 15 to rise and fall, thereby adjusting the elastic force of the spring 11.

[0025] The upper end of the support block 12 has a rectangular structure, and the upper end of the support block 12 engages with the groove 9, ensuring that when the upper end of the support block 12 engages with the groove 9, it is convenient for the screws on the support block 12 to connect with the threaded holes at the bottom of the platform 1.

[0026] Working principle: When using the ejection mechanism for demolding stamped parts, firstly according to... Figure 1 As shown, the sheet metal is placed on top of the two lower molds 8 and between the two U-shaped plates 6. Then, the cylinder 4 is activated to move the upper mold 5 downwards. The upper mold 5 causes the lower molds 8 to rotate with the rotating shaft 7. When the bottom of the lower mold 8 contacts the top of the table 1, the sheet metal is pressed by the two lower molds 8 and the upper mold 5. Figure 3 The lower mold 8 rotates, causing the ejector rod 10 to move downwards, which compresses the spring 11. When the cylinder 4 drives the upper mold 5 to move upwards, the elastic force generated by the spring 11 causes the end of the lower mold 8 to rotate upwards, lifting the formed plate.

[0027] When the spring 11 loses its elasticity after prolonged use, rotate the handle 16. The handle 16 then rotates the lead screw 13 and the inner circular plate 14. Since the support block 12 and the lead screw 13 are threadedly connected, the lead screw 13 pushes the inner circular plate 14 and the movable plate 15 upward, compressing the spring 11 and increasing its elasticity. This allows the spring 11 to generate its original elasticity to push out the formed sheet material, eliminating the need to replace the spring 11 and reducing the hassle of replacing it. When the spring 11 is no longer usable, remove several screws from the support block 12, then pull the movable plate 15 out of the groove 9. Under the action of gravity, the spring 11 falls out of the groove 9. Then, install the new spring 11 back into the groove 9, and finally reinstall the support block 12 and the movable plate 15 back into their original positions.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ejection mechanism for demolding stamped parts, comprising a platform (1), characterized in that: A top plate (3) is fixed to the top side of the platform (1) by a column (2). A cylinder (4) is fixed through the middle of the top plate (3). An upper mold (5) is fixed to the lower end of the cylinder (4). U-shaped plates (6) are fixed to both sides of the top of the platform (1). A rotating shaft (7) is installed inside the U-shaped plate (6) through a bearing. A lower mold (8) is fixed to the outer wall of the rotating shaft (7). An ejection mechanism is provided inside the platform (1).

2. The ejection mechanism for demolding stamped parts according to claim 1, characterized in that: The ejection mechanism includes a groove (9). The groove (9) is provided inside the plate (1). The lower end of the ejector rod (10) is movably installed inside the groove (9). The upper end of the ejector rod (10) passes through the top of the plate (1) and abuts against the bottom of the lower mold (8). The ejector rod (10) is movably connected to the plate (1). A support block (12) is fixed to the bottom of the plate (1) by screws. A lead screw (13) is installed through the inside of the support block (12). The groove (9) is movably provided with a movable plate (15), and an inner circular plate (14) is installed inside the movable plate (15). The upper end of the screw (13) passes through the bottom of the movable plate (15) and is fixedly connected to the center of the bottom of the inner circular plate (14). The bottom of the top rod (10) abuts against the upper end of the spring (11), and the lower end of the spring (11) abuts against the top of the movable plate (15). The lower end of the screw (13) is fixed with a handle (16).

3. An ejection mechanism for demolding stamped parts according to claim 2, characterized in that: The upper end of the top rod (10) is designed as a hemispherical structure, and the lower end of the top rod (10) is designed as a rectangular structure. The outer side of the lower end of the top rod (10) is in contact with the inner side of the groove (9).

4. An ejection mechanism for demolding stamped parts according to claim 2, characterized in that: The lead screw (13) and the support block (12) are both provided with threads, and the lead screw (13) and the support block (12) are threadedly connected.

5. An ejection mechanism for demolding stamped parts according to claim 2, characterized in that: The outer side of the inner circular plate (14) is in contact with the inner side of the movable plate (15), and the inner circular plate (14) and the movable plate (15) are rotatably connected, and the lead screw (13) and the movable plate (15) are rotatably connected.

6. An ejection mechanism for demolding stamped parts according to claim 2, characterized in that: The upper end of the support block (12) is a rectangular structure, and the upper end of the support block (12) is engaged with the groove (9).

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