A rapid ejection mechanism for injection molding mold

Abstract

The utility model relates to injection mold technical field, and disclose a kind of injection molding mold quick ejection mechanism, the injection molding mold quick ejection mechanism, including bottom plate, the upper surface of bottom plate is fixedly installed with lower mould, the inside of lower mould is provided with hollow slot, two lateral walls between the inside of hollow slot are rotatably connected with bidirectional screw rod, the surface of bidirectional screw rod is threadedly connected with two screw sleeves, two lateral walls between the inside of hollow slot are fixedly connected with slide bar, the surface of slide bar is slidably sleeved with two slide sleeves, and the upper surface of two slide sleeves and two screw sleeves is movably installed with connecting rod;The mechanism is driven screw sleeve, connecting rod drive ejector plate by bidirectional screw rod, realizes injection molding part one-time ejection;Again, secondary ejection is completed with the aid of secondary ejection assembly, avoids injection molding part residual or breakage, and overall ejection is efficient and stable, effectively improves injection molding part removal quality and work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a rapid ejection mechanism for injection molding molds. Background Technology

[0002] Injection molds are a very important part of injection molding machines. They can quickly shape the injected material and ensure the overall processing quality. When disassembling the material later, a quick ejection mechanism is needed to eject the material from the injection tank to complete the material separation and disassembly.

[0003] A quick ejection structure for injection molds, disclosed in publication number CN 218256568 U, includes: a shell, a base plate, a top plate, an injection groove, and a base. The base plate is fixedly installed at the bottom of the shell, and the injection groove is formed inside the shell. The top plate is fixedly installed inside the injection groove, and the base is slidably installed inside the base plate. A lifting device is fixedly installed inside the base plate. Compared to traditional quick ejection devices, this equipment allows for rapid replacement and disassembly of the ejector rod during use, preventing material detachment or breakage during ejection due to wear. This improves the equipment's working quality, speeds up the maintenance of internal components, and allows for rapid detachment of material from the injection groove, ensuring the integrity of the material during detachment and preventing damage. This enhances the equipment's operational quality and ensures optimal performance.

[0004] However, the above-mentioned ejection structure still has some shortcomings in use. It mainly relies on a single ejection action to separate the molded part. For molded parts with complex structures or close fit with the mold groove, incomplete ejection and molded parts remaining in the mold groove are prone to occur. In addition, there is a lack of a stable secondary auxiliary ejection mechanism. Furthermore, the reset of some components relies on a single drive, and the reset accuracy and smoothness are insufficient. Long-term use can easily affect the overall stability of the ejection mechanism, thereby restricting the efficiency of injection molding production and product quality. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a rapid ejection mechanism for injection molding molds. This solves the problem that existing mechanisms primarily rely on a single ejection action to detach the molded part. For molded parts with complex structures or those tightly fitted to the mold groove, incomplete ejection and residual parts within the mold groove are common issues. Furthermore, there is a lack of a stable secondary auxiliary ejection mechanism. Additionally, the reset of some components relies on a single drive, resulting in insufficient reset accuracy and smoothness. Long-term use can affect the overall stability of the ejection mechanism, thereby restricting the efficiency and product quality of injection molding production.

[0006] This utility model provides the following technical solution: a rapid ejection mechanism for injection molding molds, including a base plate, a lower mold fixedly mounted on the upper surface of the base plate, a slot opened inside the lower mold, a bidirectional screw rotatably connected between the two inner side walls of the slot, two threaded sleeves threaded onto the surface of the bidirectional screw, a sliding rod fixedly connected between the two inner side walls of the slot, two sliding sleeves slidably mounted on the surface of the sliding rod, connecting rods movably mounted on the upper surfaces of the two sliding sleeves and the two threaded sleeves, and a connecting plate movably mounted between the top ends of the four connecting rods;

[0007] Four vertical rods are fixedly connected to the upper surface of the connecting plate. The top ends of the four vertical rods extend into the mold groove of the lower mold and are fixedly connected to an ejector plate. The ejector plate matches the mold groove of the lower mold. A secondary ejector assembly is provided on the four vertical rods.

[0008] Preferred technical solution 1: The secondary ejection assembly includes a mounting plate and four ejection rods. The surface of the mounting plate has four through slots that match the vertical rods. The mounting plate is slidably fitted onto the four vertical rods through the through slots, and the four ejection rods are all fixedly connected to the mounting plate.

[0009] Preferred technical solution 2: The bottom wall of the mold groove of the lower mold is provided with four through holes that match the vertical rod. The vertical rod can move up and down inside the corresponding through holes. The bottom wall of the mold groove of the lower mold and the surface of the ejector plate are both provided with movable grooves that match the ejector rod. The top end of the ejector rod is flush with the upper surface of the ejector plate. The ejector rod can move inside the corresponding movable groove.

[0010] Preferred technical solution 3: Two L-shaped brackets are rotatably mounted on the upper surface of the connecting plate, and rollers are installed at both ends of the two L-shaped brackets. Baffles are fixedly connected to the inner side walls of the slot, and the positions of the baffles correspond to those of the L-shaped brackets.

[0011] Preferred technical solution four: The inner top wall of the hollow groove is fixedly connected to a telescopic rod, one end of the telescopic rod is fixedly connected to the mounting plate, and a spring is sleeved on the surface of the telescopic rod.

[0012] Preferred technical solution five: A set of magnets is fixedly connected to the lower surface of the mounting plate, and the connecting plate is made of iron.

[0013] Compared with the prior art, this utility model provides a rapid ejection mechanism for injection molding molds, which has the following beneficial effects: When it is necessary to eject the injection molded part, the bidirectional screw is driven to rotate, and the two screw sleeves move towards each other along the bidirectional screw. In conjunction with the sliding of the sliding sleeve, the four connecting rods push the connecting plate upwards. The connecting plate drives the four vertical rods to slide upwards along the through hole, and the vertical rods further drive the ejection plate upwards, ejecting the injection molded part in the mold groove of the lower mold once, causing it to initially separate. During the continued upward movement of the connecting plate, the rollers of the L-shaped bracket contact the baffle and are blocked by it. The L-shaped bracket rotates around the connecting plate, which continuously rises. The mounting plate, due to the tension generated by the spring exceeding the magnetic attraction, detaches from the connecting plate and slides upwards along the vertical rod. This causes the ejector rod to move upwards along the movable slot and extend from the movable slot of the ejector plate, performing a secondary ejection of the injection molded part to ensure complete detachment. After ejection, the bidirectional screw is driven in the opposite direction, causing the two screw sleeves to move in opposite directions. The connecting rod pulls the connecting plate downwards, causing the vertical rod and ejector plate to reset. Under the elastic restoring force of the spring and the contraction of the telescopic rod, the mounting plate slides down along the vertical rod and is again attracted to the connecting plate by the magnet. The ejector rod resets to the movable slot, and the rollers of the L-shaped bracket detach from the baffle and return to their initial state. The entire mechanism returns to its initial position, awaiting the next operation. This mechanism achieves primary ejection of the injection molded part by driving the screw sleeves and connecting rod to the ejector plate via the bidirectional screw. A secondary ejection assembly is then used to complete the secondary ejection, preventing residue or damage to the injection molded part. The overall ejection process is efficient and stable, effectively improving the quality of the removed injection molded part and work efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the internal structure of the lower mold of this utility model;

[0016] Figure 3 This is an exploded view of part of the structure of this utility model.

[0017] In the diagram: 1. Base plate; 2. Lower mold; 3. Hollow slot; 4. Bidirectional screw; 5. Screw sleeve; 6. Sliding rod; 7. Sliding sleeve; 8. Connecting rod; 9. Connecting plate; 10. Vertical rod; 11. Ejector plate; 12. Mounting plate; 13. Ejector rod; 14. L-shaped bracket; 15. Roller; 16. Baffle; 17. Telescopic rod; 18. Spring; 19. Magnet. Detailed Implementation

[0018] Please see Figure 1-3 ,

[0019] Example 1: A rapid ejection mechanism for injection molding molds includes a base plate 1, a lower mold 2 fixedly mounted on the upper surface of the base plate 1, a slot 3 opened inside the lower mold 2, a bidirectional screw 4 rotatably connected between the two inner side walls of the slot 3, two threaded sleeves 5 threaded onto the surface of the bidirectional screw 4, a sliding rod 6 fixedly connected between the two inner side walls of the slot 3, two sliding sleeves 7 slidably mounted on the surface of the sliding rod 6, connecting rods 8 movably mounted on the upper surfaces of the two sliding sleeves 7 and the two threaded sleeves 5, and a connecting plate 9 movably mounted between the top ends of the four connecting rods 8;

[0020] Four vertical rods 10 are fixedly connected to the upper surface of the connecting plate 9. The top ends of the four vertical rods 10 extend into the mold groove of the lower mold 2 and are fixedly connected to the ejector plate 11. The ejector plate 11 matches the mold groove of the lower mold 2. Secondary ejection components are provided on the four vertical rods 10.

[0021] Example 2: The difference between this example and Example 1 is that the secondary ejection assembly includes a mounting plate 12 and four ejection rods 13. The surface of the mounting plate 12 is provided with four through slots that match the vertical rods 10. The mounting plate 12 is slidably sleeved on the four vertical rods 10 through the through slots. All four ejection rods 13 are fixedly connected to the mounting plate 12.

[0022] Example 3: The difference between this example and Example 1 is that the bottom wall of the mold groove of the lower mold 2 is provided with four through holes that match the vertical rod 10. The vertical rod 10 can move up and down inside the corresponding through holes. The bottom wall of the mold groove of the lower mold 2 and the surface of the ejector plate 11 are both provided with movable grooves that match the ejector rod 13. The top of the ejector rod 13 is flush with the upper surface of the ejector plate 11. The ejector rod 13 can move inside the corresponding movable groove.

[0023] Example 4: The difference between this example and Example 1 is that two L-shaped brackets 14 are rotatably mounted on the upper surface of the connecting plate 9, and rollers 15 are installed at both ends of the two L-shaped brackets 14. Baffles 16 are fixedly connected to both sides of the inner side wall of the slot 3, and the positions of the baffles 16 and the L-shaped brackets 14 correspond to each other.

[0024] Example 5: The difference between this example and Example 1 is that the inner top wall of the slot 3 is fixedly connected to the telescopic rod 17, one end of the telescopic rod 17 is fixedly connected to the mounting plate 12, and a spring 18 is sleeved on the surface of the telescopic rod 17.

[0025] Example 6: The difference between this example and Example 1 is that a set of magnets 19 are fixedly connected to the lower surface of the mounting plate 12, and the connecting plate 9 is made of iron.

[0026] In summary, in the initial state of this injection molding mold rapid ejection mechanism, the mounting plate 12 is attracted to the iron connecting plate 9 by a set of magnets 19, the top of the ejection rod 13 is flush with the upper surface of the ejection plate 11, the spring 18 on the surface of the telescopic rod 17 is in a natural or slightly compressed state, the rollers 15 at both ends of the two L-shaped brackets 14 do not contact the baffles 16 fixed on both sides of the empty groove 3, the bidirectional screw 4 does not rotate, the two threaded sleeves 5 on its surface and the two sliding sleeves 7 on the surface of the sliding rod 6 are all in the initial position, and the four connecting rods 8 support the connecting plate 9 in a low position.

[0027] When the injection molded part needs to be ejected, the bidirectional screw 4 is driven to rotate, and the two screw sleeves 5 move towards each other along the bidirectional screw 4. In conjunction with the sliding sleeve 7, the four connecting rods 8 push the connecting plate 9 upwards. The connecting plate 9 then drives the four vertical rods 10 to slide upwards along the through hole. The vertical rods 10 further drive the ejector plate 11 upwards, ejecting the injection molded part from the mold groove of the lower mold 2, causing it to initially detach. As the connecting plate 9 continues to move upwards, the rollers 15 of the L-shaped bracket 14 contact the baffle 16 and are blocked by it. The bracket 14 rotates around the connecting plate 9, while the connecting plate 9 continues to rise. The mounting plate 12, due to the tension generated by the spring 18 exceeding the attraction force of the magnet 19, detaches from the connecting plate 9 and slides upwards along the vertical rod 10, causing the ejector rod 13 to move upwards along the movable groove and extend out from the movable groove of the ejector plate 11, performing a secondary ejection of the injection molded part to ensure complete detachment. After ejection, the bidirectional screw 4 is driven in the opposite direction, causing the two screw sleeves 5 to move in opposite directions. The connecting rod 8 pulls the connecting plate 9 downwards, causing the vertical rod 10 and the ejector plate 11 to reset. Under the elastic restoring force of the spring 18 and the contraction action of the telescopic rod 17, the mounting plate 12 slides down along the vertical rod 10, and is attracted to the connecting plate 9 again by the magnet 19. The ejector rod 13 resets to the movable groove. The rollers 15 of the bracket 14 disengage from the baffle 16 and return to their initial state, and the entire mechanism returns to its initial position to await the next operation. The mechanism drives the screw sleeve 5 and the connecting rod 8 to drive the ejector plate 11 through the bidirectional screw 4 to achieve the first ejection of the injection molded part. Then, the secondary ejection assembly is used to complete the secondary ejection, avoiding the injection molded part from being left behind or damaged. The overall ejection is efficient and stable, effectively improving the quality of the injection molded part and the work efficiency.

Claims

1. A rapid ejection mechanism for injection molding molds, comprising a base plate (1), characterized in that: A lower mold (2) is fixedly installed on the upper surface of the base plate (1). A slot (3) is opened inside the lower mold (2). A double-acting screw (4) is rotatably connected between the two inner side walls of the slot (3). Two threaded sleeves (5) are threaded onto the surface of the double-acting screw (4). A sliding rod (6) is fixedly connected between the two inner side walls of the slot (3). Two sliding sleeves (7) are slidably fitted onto the surface of the sliding rod (6). Connecting rods (8) are movably installed on the upper surfaces of the two sliding sleeves (7) and the two threaded sleeves (5). A connecting plate (9) is movably installed between the top ends of the four connecting rods (8). Four vertical rods (10) are fixedly connected to the upper surface of the connecting plate (9). The top ends of the four vertical rods (10) extend into the mold groove of the lower mold (2) and are fixedly connected to an ejector plate (11). The ejector plate (11) matches the mold groove of the lower mold (2). A secondary ejector assembly is provided on the four vertical rods (10).

2. The rapid ejection mechanism for injection molding molds according to claim 1, characterized in that: The secondary ejection assembly includes a mounting plate (12) and four ejection rods (13). The surface of the mounting plate (12) is provided with four through slots that match the vertical rods (10). The mounting plate (12) is slidably sleeved on the four vertical rods (10) through the through slots. The four ejection rods (13) are all fixedly connected to the mounting plate (12).

3. The rapid ejection mechanism for injection molding molds according to claim 2, characterized in that: The bottom wall of the mold groove of the lower mold (2) is provided with four through holes that match the vertical rod (10). The vertical rod (10) can move up and down inside the corresponding through holes. The bottom wall of the mold groove of the lower mold (2) and the surface of the ejector plate (11) are provided with movable grooves that match the ejector rod (13). The top of the ejector rod (13) is flush with the upper surface of the ejector plate (11). The ejector rod (13) can move inside the corresponding movable groove.

4. The rapid ejection mechanism for injection molding molds according to claim 3, characterized in that: Two L-shaped brackets (14) are rotatably mounted on the upper surface of the connecting plate (9). Rollers (15) are installed at both ends of the two L-shaped brackets (14). Baffles (16) are fixedly connected to both sides of the inner side wall of the slot (3). The positions of the baffles (16) and the L-shaped brackets (14) correspond to those of the slots (3).

5. The rapid ejection mechanism for an injection molding die according to claim 4, characterized in that: The inner top wall of the slot (3) is fixedly connected to the telescopic rod (17), one end of the telescopic rod (17) is fixedly connected to the mounting plate (12), and a spring (18) is sleeved on the surface of the telescopic rod (17).

6. The rapid ejection mechanism for an injection molding die according to claim 5, characterized in that: A set of magnets (19) are fixedly connected to the lower surface of the mounting plate (12), and the connecting plate (9) is made of iron.

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