Ejection mechanism for a mold

Abstract

The utility model discloses a kind of ejection mechanisms for mould, including lower mould, the top of lower mould is equipped with multiple guide holes, the bottom corner of lower mould is fixedly connected with mounting plate, the bottom of mounting plate is fixedly connected with guide column, the surface of guide column is movably sleeved with reset spring, the surface of guide column is slidably connected with top plate, the reset spring is between mounting plate and top plate, the top of top plate is fixedly connected with multiple ejector pins. The utility model is rotated by starting motor one, threaded screw rod, threaded block is rotated, and because the movement of threaded block makes rotating stand rotate between threaded block and rotating seat, and top plate and ejector pin are lifted upwards, so as to eject product, because the size of ejector pin and guide hole is smaller, so as to reduce the leakage of material, and when moving on top plate, reset spring is extruded and shrinks, and the movement of ejector pin and top plate is slowed down by the elastic force of reset spring, avoid mechanical force too big to cause damage to product.

Description

Technical Field

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

[0002] In the production of metal sheets, in order to improve production efficiency, molds are usually used to stamp the sheets. To facilitate product discharge, an ejection structure is usually added to the mold.

[0003] According to publication number CN213701537U, an ejection mechanism for a mold includes an upper mold and a lower mold. A cavity is formed in the middle of the upper surface of the lower mold, and an ejector plate is provided at the bottom of the cavity. A first motor is installed at the bottom of the lower mold. A first bevel gear is fixedly connected to the output end of the first motor. A second bevel gear meshes with one side of the first bevel gear. A ball screw is inserted inside the second bevel gear, and L-shaped ejector rods are provided on both sides of the ball screw. This ejection mechanism improves its working efficiency through the first motor and the first bevel gear. The use of a limiting strip and a limiting groove prevents deviation during ejection. Activating the second motor drives the rotating gear to rotate, causing the striking block to strike the cavity with a small amplitude, completely separating the molded item from the cavity, thus facilitating demolding.

[0004] The product can be ejected through the aforementioned first motor and first bevel gear, but the ejector plate is placed inside the mold cavity. After the ejector plate moves up and down frequently, material leakage is likely to occur. Furthermore, the mechanical power of the first motor acts directly on the product, which can easily cause product damage. Utility Model Content

[0005] The purpose of this invention is to provide an ejection mechanism for molds 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 a mold, comprising a lower mold, wherein the top of the lower mold has multiple guide holes, and mounting plates are fixedly connected to the four corners of the bottom of the lower mold. Guide pillars are fixedly connected to the bottom of the mounting plates, and return springs are movably sleeved on the surface of the guide pillars. A top plate is slidably connected to the surface of the guide pillars, and the return springs are located between the mounting plates and the top plate. Multiple ejector pins are fixedly connected to the top of the top plate, and the ejector pins are slidably connected inside the guide holes and adapted to the size of the guide holes.

[0007] As a further preferred embodiment of this technical solution, the bottom of the guide post is provided with a threaded groove, the bottom of the threaded groove is threadedly connected to a threaded rod, and the bottom of the threaded rod is fixedly connected to a limiting plate, which is located at the bottom of the top plate.

[0008] As a further preferred embodiment of this technical solution, support plates are symmetrically arranged on both sides of the bottom of the lower mold. A base plate is fixedly connected to the bottom of the support plate, and a connecting frame is fixedly connected to the top of the base plate. A threaded screw is rotatably connected inside the connecting frame. One end of the threaded screw passes through the connecting frame and is fixedly connected to a motor. A threaded block is threadedly connected to the surface of the threaded screw.

[0009] As a further preferred embodiment of this technical solution, guide rails are symmetrically arranged on both sides of the top of the base plate, and a slider is slidably connected to the top of the guide rails. The slider is fixedly installed on one side of the threaded block.

[0010] As a further preferred embodiment of this technical solution, the bottom sides of the top plate are symmetrically provided with rotating seats, the bottom of the rotating seats are rotatably connected to a rotating frame, and the rotating frame is rotatably connected to the top of the threaded block.

[0011] As a further preferred embodiment of this technical solution, the inner wall of the lower mold is symmetrically provided with mounting grooves on both sides, an air outlet plate is provided inside the mounting groove, an air distribution plate is provided on one side of the air outlet plate, and the air distribution plate is provided with multiple through holes in the transverse direction.

[0012] As a further preferred embodiment of this technical solution, the inner walls of the air outlet plate are symmetrically provided with sliding sleeves, and the sliding sleeves are provided with sliding columns. A pad is fixedly connected to the end of the sliding column away from the sliding sleeve. Multiple sealing plates are provided in the transverse direction on the side of the pad away from the sliding column. The number and size of the sealing plates and the through holes correspond to each other and are engaged inside the through holes.

[0013] As a further preferred embodiment of this technical solution, two motors are symmetrically arranged on both sides of the lower mold. An adjusting screw is fixedly connected to the output shaft of the two motors. A threaded sleeve is threadedly connected to the surface of the adjusting screw. The threaded sleeve is located inside the mounting groove and one end is fixed to one side of the pad.

[0014] As a further preferred embodiment of this technical solution, fans are symmetrically arranged on both sides of the lower mold, and an air inlet pipe is fixedly connected between the fans and the air outlet plate.

[0015] As a further preferred embodiment of this technical solution, the lower mold is fixedly connected to the four top corners with connecting columns, and the upper mold is slidably connected to the surface of the connecting columns.

[0016] This utility model provides an ejection mechanism for a mold, which has the following advantages:

[0017] (1) This utility model starts the motor, whose output shaft drives the screw to rotate, and the screw block rotates accordingly. The movement of the screw block is limited by the sliding of the slider on the guide rail surface. The rotating frame rotates between the screw block and the rotating seat, and pushes the top plate and the ejector pin upward, thereby ejecting the product. Since the ejector pin and the guide hole are small in size, the leakage of material is reduced. When the top plate moves up, the return spring is squeezed and contracted, and the elastic force of the return spring slows down the movement of the ejector pin and the top plate, avoiding excessive mechanical force from damaging the product.

[0018] (2) This utility model draws outside air into the air inlet pipe by starting the fan and transports it to the air outlet plate. The air is then sprayed out through the through hole on the air distribution plate, thereby increasing the air pressure in the mold cavity, so as to facilitate the separation of the lower mold and the product and facilitate the ejection of the product. When the second motor is started, its output shaft drives the adjusting screw to rotate, and the threaded sleeve rotates accordingly and pushes the pad and sealing plate to move. The sealing plate seals the through hole, thereby ensuring the overall structure of the mold cavity and avoiding product errors due to changes in the mold cavity. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the rear structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the ejector pin structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the lower mold of this utility model;

[0023] Figure 5 This is a schematic diagram of the guide post and threaded rod structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the internal structure of the air outlet panel of this utility model.

[0025] In the diagram: 1. Lower mold; 2. Guide hole; 3. Mounting plate; 4. Guide post; 5. Return spring; 6. Top plate; 7. Ejector pin; 8. Threaded groove; 9. Threaded rod; 10. Limiting plate; 11. Support plate; 12. Base plate; 13. Connecting frame; 14. Threaded screw; 15. Motor 1; 16. Threaded block; 17. Guide rail; 18. Slider; 19. Rotary seat; 20. Rotating frame; 21. Mounting groove; 22. Air outlet plate; 23. Air distribution plate; 24. Through hole; 25. Sliding sleeve; 26. Sliding column; 27. Pad plate; 28. Sealing plate; 29. ​​Motor 2; 30. Adjusting screw; 31. Threaded sleeve; 32. Fan; 33. Air inlet pipe; 34. Connecting post; 35. Upper mold. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] This utility model provides a technical solution: such as Figures 1 to 6 As shown, in this embodiment, an ejection mechanism for a mold includes a lower mold 1. The top of the lower mold 1 has multiple guide holes 2. The bottom corners of the lower mold 1 are fixedly connected to mounting plates 3. The bottom of the mounting plates 3 is fixedly connected to guide pillars 4. A return spring 5 is movably sleeved on the surface of the guide pillars 4. A top plate 6 is slidably connected to the surface of the guide pillars 4. The return spring 5 is located between the mounting plates 3 and the top plate 6. The top of the top plate 6 is fixedly connected to multiple ejector pins 7. The ejector pins 7 are slidably connected inside the guide holes 2 and are adapted to the size of the guide holes 2.

[0028] The mounting plate 3 is fixed to the bottom of the lower mold 1 with screws. The return spring 5 is sleeved on the surface of the guide post 4 and is compressed between the mounting plate 3 and the top plate 6. Thus, during the upward movement of the ejector pin 7, the elastic force of the return spring 5 can slow down the movement of the ejector pin 7 and quickly return it to its original position.

[0029] The bottom of the guide post 4 is provided with a threaded groove 8, and the bottom of the threaded groove 8 is threadedly connected to a threaded rod 9. The bottom of the threaded rod 9 is fixedly connected to a limiting plate 10, which is located at the bottom of the top plate 6.

[0030] Rotate the limiting plate 10 so that the threaded rod 9 rotates inside the threaded groove 8. After rotating a certain number of times, the limiting plate 10 contacts the guide post 4, thereby fixing the limiting plate 10 on the guide post 4 and limiting the bottom of the top plate 6. A pressure sensor is set on the top of the positioning plate to detect the position of the top plate 6, thereby ensuring that the ejector pin 7 can move back accurately.

[0031] Support plates 11 are symmetrically arranged on both sides of the bottom of the lower mold 1. A base plate 12 is fixedly connected to the bottom of the support plate 11. A connecting frame 13 is fixedly connected to the top of the base plate 12. A threaded screw 14 is rotatably connected inside the connecting frame 13. One end of the threaded screw 14 passes through the connecting frame 13 and is fixedly connected to a motor 15. A threaded block 16 is threadedly connected to the surface of the threaded screw 14.

[0032] Guide rails 17 are symmetrically arranged on both sides of the top of the base plate 12. A slider 18 is slidably connected to the top of the guide rails 17. The slider 18 is fixedly installed on one side of the threaded block 16.

[0033] Rotary seats 19 are symmetrically arranged on both sides of the bottom of the top plate 6. A rotating frame 20 is rotatably connected to the bottom of the rotary seat 19, and the rotating frame 20 is rotatably connected to the top of the threaded block 16.

[0034] When the motor 15 is started, its output shaft drives the threaded screw 14 to rotate, and the threaded block 16 rotates accordingly. The movement of the threaded block 16 is limited by the sliding of the slider 18 on the surface of the guide rail 17. The rotating frame 20 rotates between the threaded block 16 and the rotating seat 19, thereby adjusting the height of the top plate 6 and the ejector pin 7 to complete the ejection of the product.

[0035] The inner wall of the lower mold 1 is symmetrically provided with mounting grooves 21 on both sides. An air outlet plate 22 is provided inside the mounting groove 21. An air distribution plate 23 is provided on one side of the air outlet plate 22. The air distribution plate 23 is provided with multiple through holes 24 in the transverse direction.

[0036] The inner walls of the air outlet plate 22 are symmetrically provided with sliding sleeves 25. The sliding sleeves 25 are provided with sliding columns 26. The end of the sliding column 26 away from the sliding sleeve 25 is fixedly connected to a pad 27. The side of the pad 27 away from the sliding column 26 is provided with multiple sealing plates 28 in the transverse direction. The number and size of the sealing plates 28 and the through holes 24 are corresponding and are engaged inside the through holes 24.

[0037] Motor 29 is symmetrically arranged on both sides of the lower mold 1. The output shaft of motor 29 is fixedly connected to an adjusting screw 30. The surface of the adjusting screw 30 is threadedly connected to a threaded sleeve 31. The threaded sleeve 31 is located inside the mounting groove 21 and one end is fixed to one side of the pad 27.

[0038] When the motor 29 is started, its output shaft drives the adjusting screw 30 to rotate. The threaded sleeve 31 rotates accordingly and pushes or pulls the pad 27 and the sealing plate 28 to move. The sliding column 26 and the sliding sleeve 25 slide relative to each other to limit the movement of the pad 27. The opening and closing of the through hole 24 is controlled by the movement of the sealing plate 28, thereby facilitating the entry of gas and the stamping of metal sheets.

[0039] Fans 32 are symmetrically arranged on both sides of the lower mold 1, and an air inlet pipe 33 is fixedly connected between the fans 32 and the air outlet plate 22.

[0040] Start the fan 32 to draw outside air into the air inlet pipe 33 and transport it to the air outlet plate 22. The air flows through the gap between the air outlet plate 22 and the pad plate 27 to the air distribution plate 23 and is ejected from the through hole 24, thereby increasing the air pressure in the mold cavity, so as to facilitate the separation of the lower mold 1 and the upper mold 35, the lower mold 1 and the product, and facilitate the ejection of the product.

[0041] The top four corners of the lower mold 1 are fixedly connected to connecting pillars 34, and the surface of the connecting pillars 34 is slidably connected to the upper mold 35.

[0042] This utility model provides an ejection mechanism for a mold, the specific working principle of which is as follows:

[0043] In use, the upper mold 35 and the lower mold 1 work together to stamp the metal sheet. After forming, the motor 29 is started, and its output shaft drives the adjusting screw 30 to rotate. The threaded sleeve 31 rotates accordingly and pulls the pad 27 and the sealing plate 28 to move. The sliding column 26 and the sliding sleeve 25 slide relative to each other, thereby limiting the movement of the pad 27. After moving a certain distance, the sealing plate 28 disengages from the through hole 24. At this time, the fan 32 is started to draw outside air into the air inlet pipe 33 and transport it to the air outlet plate 22. The air is then distributed through the air distribution plate 23. The air is ejected through the through hole 24, thereby increasing the air pressure inside the mold cavity, allowing the upper mold 35 and the lower mold 1 to separate easily. At the same time, under the action of wind, the product separates from the inner wall of the mold cavity. The motor 15 is started, and its output shaft drives the threaded screw 14 to rotate. The threaded block 16 rotates accordingly, and the movement of the threaded block 16 is limited by the sliding of the slider 18 on the surface of the guide rail 17. The rotating frame 20 rotates between the threaded block 16 and the rotating seat 19, and pushes the top plate 6 upward. The return spring 5 is compressed and contracted, and the ejector pin 7 slides inside the guide hole 2, thereby ejecting the product.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ejection mechanism for a mold, comprising a lower mold (1), characterized in that: The lower mold (1) has multiple guide holes (2) on its top. The four corners of the bottom of the lower mold (1) are fixedly connected to mounting plates (3). The bottom of the mounting plates (3) is fixedly connected to guide pillars (4). The surface of the guide pillars (4) is movably sleeved with a return spring (5). The surface of the guide pillars (4) is slidably connected to a top plate (6). The return spring (5) is located between the mounting plates (3) and the top plate (6). The top of the top plate (6) is fixedly connected to multiple ejector pins (7). The ejector pins (7) are slidably connected inside the guide holes (2) and are adapted to the size of the guide holes (2).

2. The ejection mechanism for a mold according to claim 1, characterized in that: The bottom of the guide post (4) is provided with a threaded groove (8), and the bottom of the threaded groove (8) is threadedly connected to a threaded rod (9). The bottom of the threaded rod (9) is fixedly connected to a limiting plate (10), and the limiting plate (10) is located at the bottom of the top plate (6).

3. The ejection mechanism for a mold according to claim 1, characterized in that: The lower mold (1) has symmetrical support plates (11) on both sides of its bottom. The bottom of the support plate (11) is fixedly connected to a base plate (12). The top of the base plate (12) is fixedly connected to a connecting frame (13). The connecting frame (13) is rotatably connected to a threaded screw (14). One end of the threaded screw (14) passes through the connecting frame (13) and is fixedly connected to a motor (15). The surface of the threaded screw (14) is threadedly connected to a threaded block (16).

4. The ejection mechanism for a mold according to claim 3, characterized in that: The top two sides of the base plate (12) are symmetrically provided with guide rails (17), and the top of the guide rails (17) is slidably connected with a slider (18), which is fixedly installed on one side of the threaded block (16).

5. The ejection mechanism for a mold according to claim 1, characterized in that: Rotary seats (19) are symmetrically arranged on both sides of the bottom of the top plate (6). A rotating frame (20) is rotatably connected to the bottom of the rotating seat (19). The rotating frame (20) is rotatably connected to the top of the threaded block (16).

6. The ejection mechanism for a mold according to claim 1, characterized in that: The lower mold (1) has symmetrically provided mounting grooves (21) on both sides of its inner wall. An air outlet plate (22) is provided inside the mounting groove (21). An air distribution plate (23) is provided on one side of the air outlet plate (22). The air distribution plate (23) has multiple through holes (24) in the transverse direction.

7. The ejection mechanism for a mold according to claim 6, characterized in that: The inner wall of the air outlet plate (22) is symmetrically provided with sliding sleeves (25) on both sides. The sliding sleeves (25) are provided with sliding columns (26) inside. The end of the sliding column (26) away from the sliding sleeve (25) is fixedly connected with a pad (27). The side of the pad (27) away from the sliding column (26) is provided with multiple sealing plates (28) in the transverse direction. The number and size of the sealing plates (28) and the through holes (24) correspond and are engaged inside the through holes (24).

8. The ejection mechanism for a mold according to claim 1, characterized in that: The lower mold (1) is symmetrically provided with two motors (29) on both sides. The output shaft of the motor (29) is fixedly connected to an adjusting screw (30). The surface of the adjusting screw (30) is threadedly connected to a threaded sleeve (31). The threaded sleeve (31) is located inside the mounting groove (21) and one end is fixed to one side of the pad (27).

9. The ejection mechanism for a mold according to claim 1, characterized in that: The lower mold (1) is symmetrically provided with fans (32) on both sides, and an air inlet pipe (33) is fixedly connected between the fans (32) and the air outlet plate (22).

10. The ejection mechanism for a mold according to claim 1, characterized in that: The lower mold (1) is fixedly connected to the four corners of the top with connecting columns (34), and the upper mold (35) is slidably connected to the surface of the connecting columns (34).

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