A mold ejection mechanism

Abstract

The utility model provides a kind of mould ejection mechanism, including lower ejection mechanism and upper ejection mechanism, the inclined ejector device is fixed on the lower ejection mechanism, the upper ejection mechanism is fixed with multiple groups of ejector pin, the hook is installed on the lower ejection mechanism, the top of the hook is connected with sliding mechanism, the sliding mechanism is installed in the upper ejection mechanism inside, the sliding mechanism includes sliding block, the top of hook is clamped in the clamping groove of sliding block, the sliding block is slidably arranged on sliding block guide block, the outside of the sliding block is contacted with inclined wedge block. Secondary ejection mode is used in the application, the inclined ejector device is first separated from the reverse buckling part, and then the entire workpiece is ejected by ejector pin, with the following advantages: full-automatic production can be realized during mould injection production process, labor cost is reduced; product is not particularly sticky to inclined ejector, and the yield is high;Ejection mode is mechanical ejection, and the structure is stable and practical.

Description

Technical Field

[0001] This application relates to the field of injection mold technology, specifically to a mold ejection mechanism. Background Technology

[0002] like Figure 1 , Figure 2 The cage shown has 6 square holes 24, and each square hole 24 has a recessed undercut on one side. The undercut is used for the bearing arc surface placement. The product cavity depth is about 23mm. The product structure does not have any special ribs to guide the product along the Z-axis. When the product is ejected, it is particularly easy to stick to the angled ejector. During injection molding, the product is not easy to remove from the mold.

[0003] After searching, the applicant found no relevant solutions; therefore, a new technical solution is needed to address the aforementioned technical problems. Utility Model Content

[0004] This utility model provides a mold ejection mechanism, including a lower ejection mechanism and an upper ejection mechanism. The lower ejection mechanism is fixed with a slanted ejector device, and the upper ejection mechanism is fixed with multiple sets of ejector pins. The lower ejection mechanism is equipped with a hook, the top of which is connected to a sliding mechanism. The sliding mechanism is installed inside the upper ejection mechanism and includes a slider. The top of the hook is engaged in the engagement groove of the slider. The slider is slidably disposed on a slider guide block, and the outer side of the slider is in contact with a slanted wedge block.

[0005] As a preferred embodiment, the slider has a spring hole on the side opposite to the wedge block, and a spring is installed in the spring hole.

[0006] As a preferred embodiment, the lower ejection mechanism includes a lower top plate one and a lower top plate two, and the hook and inclined ejection device are installed on the lower top plate two.

[0007] As a preferred embodiment, the hook includes a vertical portion, and a horizontal portion is provided at the top of the vertical portion. As a preferred embodiment, a transition slope is provided at the top of the horizontal portion.

[0008] As a preferred option, the vertical part and the horizontal part are set perpendicularly and integrally formed.

[0009] As a preferred embodiment, the inclined top device includes an inclined top seat installed on the lower top plate II, and an inwardly recessed forming part is installed at the top of the inclined top seat at an angle; wherein, one inwardly recessed forming part is installed on each of the inclined top seats on both sides, and two inwardly recessed forming parts are installed on the remaining inclined top seats.

[0010] As a preferred embodiment, the upper ejection mechanism includes an upper top plate one and an upper top plate two. The bottom of the upper top plate one is provided with an installation groove, and the lower top plate two is disposed in the installation groove. Both the upper top plate one and the upper top plate two are provided with inclined top seat holes for inclined top seats to pass through. The upper top plate two is provided with a sliding mechanism installation groove, in which a sliding mechanism is installed. The upper top plate two is also provided with multiple sets of ejector pins.

[0011] As a preferred embodiment, the sliding mechanism mounting groove includes a slider guide block mounting groove, the upper part of which is provided with a through slider mounting groove, and one side of which is provided with a wedge block moving hole that communicates with the mounting groove.

[0012] As a preferred embodiment, the side of the slider that contacts the wedge includes a flat side and an inclined side, and the snap-fit ​​groove includes a vertical hole and a horizontal hole. The length L3 of the vertical hole is greater than the length L4 of the vertical part, and the length L3 of the horizontal hole is greater than the length L4 of the horizontal part.

[0013] As a preferred embodiment, the side of the wedge block that contacts the slider includes a wedge plane and a wedge slope.

[0014] This application adopts a two-stage ejection method, first disengaging the inclined ejector device from the undercut part, and then ejecting the entire workpiece through the ejector pin, which has the following advantages: 1. It can realize fully automated production of molds during the injection molding process, reducing the cost of manual part removal; 2. The product does not stick particularly well to the angled top, resulting in a high yield rate; 3. The ejection method is mechanical ejection, and the structure is stable and practical. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of workpiece angle one; Figure 2 This is a structural schematic diagram of workpiece angle two; Figure 3 This is a structural schematic diagram from one angle of this application; Figure 4 This is a structural schematic diagram from angle two of this application; Figure 5 This is a structural schematic diagram from angle three of this application; Figure 6 yes Figure 5 Cross-sectional view of AA in the middle; Figure 7 This is a structural schematic diagram from one of the structural angles of this application; Figure 8 This is a structural schematic diagram from a second structural perspective of this application; Figure 9This is a structural schematic diagram of the sliding mechanism and hook cooperating at angle one in this application; Figure 10 This is a schematic diagram of the sliding mechanism and hook cooperating at angle two of this application; Figure 11 yes Figure 10 A cross-sectional view of BB; Figure 12 This is a structural schematic diagram of the lower-level ejection mechanism at angle one; Figure 13 This is a structural schematic diagram of angle two of the lower ejection mechanism; Figure 14 This is a structural schematic diagram of angle three of the lower ejection mechanism; Figure 15 yes Figure 14 A cross-sectional view of CC; Figure 16 yes Figure 14 A cross-sectional view of DD; Figure 17 This is a schematic diagram of the hook structure of this application; Figure 18 This is a schematic diagram of the inclined plane device of this application; Figure 19 This is a structural schematic diagram of the upper ejection mechanism at angle one in this application; Figure 20 This is a structural schematic diagram of the upper ejection mechanism at angle two in this application; Figure 21 This is a structural schematic diagram of the upper ejection mechanism at angle three in this application; Figure 22 yes Figure 21 A cross-sectional view of the EE; Figure 23 yes Figure 21 A cross-sectional view of FF; Figure 24 yes Figure 21 A cross-sectional view of GG; Figure 25 This is a structural schematic diagram of angle one of the slider; Figure 26 This is a structural schematic diagram of angle two of the slider; Figure 27 This is a structural schematic diagram of angle three of the slider; Figure 28 yes Figure 27 Cross-sectional view of HH in the middle; Figure 29 This is a schematic diagram of the wedge block structure; Figure 30 This is a schematic diagram of the installation of the wedge block and the upper mold; Figure 31 yes Figure 30 Sectional view of II; Figure 32 This is a schematic diagram of the guide plate structure; Figure 33 This is a schematic diagram of the structure of the guide plate and the inclined top device working together; in: 1. Lower ejection mechanism; 2. Upper ejection mechanism; 3. Angled ejector; 4. Guide plate; 5. Guide hole; 6. Upper mold; 7. Workpiece; 8. Undercut; 9. Ejector pin; 10. Hook; 11. Slider; 12. Snap-fit ​​groove; 13. Slider guide block; 14. Angled wedge block; 15. Lower ejector plate one; 16. Lower ejector plate two; 17. Ejection hole; 18. Upper ejector plate one; 19. Vertical part; 20. Horizontal part; 21. Transition angle 21. Surface; 22. Inclined top seat; 23. Concave forming part; 24. Square hole; 25. Upper top plate II; 26. Mounting groove; 27. Inclined top seat hole; 28. Slider guide block mounting groove; 29. ​​Slider mounting groove; 30. Inclined wedge block moving hole; 31. Flat side; 32. Inclined side; 33. Vertical hole; 34. Horizontal hole; 35. Inclined wedge plane; 36. Inclined wedge slope; 37. Spring hole; 38. Spring; 39. Sliding mechanism mounting groove. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 To be continued Figure 33 The specific embodiments of this utility model will be described in detail below. It should be noted that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model. Example 1

[0017] This embodiment uses a two-cavity mold. This application only protects the ejection mechanism. Therefore, the injection molding part will not be described in detail. Technicians can make specific settings according to the specific situation.

[0018] A mold ejection mechanism includes a lower ejection mechanism 1 and an upper ejection mechanism 2. A slanted ejector device 3 is fixed to the lower ejection mechanism 1. A guide plate 4 is provided on the outer side of the slanted ejector device 3. The guide plate 4 is fixed in a guide plate mounting groove at the lower part of the upper mold 6. A guide hole 5 is provided on the guide plate 4. When the lower ejection mechanism 1 and the upper ejection mechanism 2 move upwards as a whole, the slanted ejector device 3, guided by the guide hole 5, disengages from the undercut 8 of the workpiece 7. Multiple sets of ejector pins 9 are fixed to the upper ejection mechanism 2. After the lower ejection mechanism 1 reaches the limit distance, the upper ejection mechanism 2 continues to move with the ejector pins 9. The mechanism achieves complete separation of the product from the mold. A hook 10 is installed on the lower ejection mechanism 1. The top of the hook 10 is connected to a sliding mechanism. The sliding mechanism is installed inside the upper ejection mechanism 2. The sliding mechanism includes a slider 11. The top of the hook 10 is engaged in the engagement groove 12 of the slider 11. The slider 11 is slidably disposed on the slider guide block 13. The length L1 of the slider 11 is less than the length L2 of the slider guide block 13. The slider 11 moves along the slider guide block 13. The outer side of the slider 11 contacts the wedge block 14. The wedge block 14 is connected to the upper mold 6.

[0019] The working principle of this embodiment is as follows: During production, injection molding is performed first, and after cooling, the mold is opened. During the mold opening process, the injection molding machine performs an ejection action. The lower ejection mechanism 1 and the upper ejection mechanism 2 of the mold move under the force of the ejector roller of the injection molding machine. In the initial stage of ejection, the lower ejection mechanism 1 and the upper ejection mechanism 2 move simultaneously. During the movement, under the action of the wedge block 14, the slider 11 moves along the slider guide block 13. When the bottom surface of the wedge block 14 contacts the lower ejection mechanism 1, the hook 10 disengages from the locking groove 12, and the angled ejector device 3 disengages from the undercut 8 of the workpiece 7. The lower ejection mechanism 1 and the upper ejection mechanism 2 separate. Under the action of the wedge block 14, the lower ejection mechanism 1 remains in this position and no longer moves, while the upper ejection mechanism 2 continues to move. Then, the workpiece 7 is ejected through the ejector pin 9, so that the product is removed from the mold core and the product 7 is taken out. Example 2

[0020] This embodiment describes the lower-level ejection mechanism 1, specifically: The lower ejection mechanism 1 includes a lower top plate 15 and a lower top plate 2 16. The lower top plate 15 and the lower top plate 2 16 are connected by screws or the like. The hook 10 and the inclined ejection device 3 are installed on the lower top plate 2 16. The lower top plate 15 and the lower top plate 2 are provided with ejection holes 17 in the middle. When the injection molding machine ejects, the ejector rod contacts the upper top plate 18 through the ejection hole 17. With the cooperation of the hook 10 and the sliding mechanism, the lower ejection mechanism 1 and the upper ejection mechanism 2 move together in the initial stage. The hook 10 includes a vertical part 19 and a horizontal part 20 is provided at the top of the vertical part 19. Preferably, in order to facilitate the movement of the hook 10 in the locking groove 12, the top of the horizontal part 20 is provided with a transition slope 21. The vertical part 19 and the horizontal part 20 are arranged perpendicularly and integrally formed.

[0021] The inclined top device 3 includes an inclined top seat 22 installed on the lower top plate 16. The top of the inclined top seat 22 is inclined with a concave forming part 23. Because of the inclined setting, when the inclined top device 3 moves upward, the concave forming part 23 disengages from the undercut 8. The concave forming part 23 is used to form the undercut 8 part of the workpiece 7. Combined with the secondary ejection setting, it is convenient to disengage from the undercut 8 part and also convenient to eject the workpiece 7. In this embodiment, the workpiece 7 has six square holes 24. Each square hole 24 has an undercut 8 part on both sides. Specifically, in this embodiment, seven inclined top seats 22 are set in one cavity. Among them, one concave forming part 23 is installed on each of the two inclined top seats 22, and two concave forming parts 23 are installed on the remaining five inclined top seats 22, for a total of twelve concave forming parts 23, which form the undercut 8 part of each of the six square holes 24. Example 3

[0022] This embodiment describes the upper ejection mechanism 2, specifically: The upper ejection mechanism 2 includes an upper top plate 18 and an upper top plate 25. The bottom of the upper top plate 18 is provided with an installation groove 26. The lower top plate 26 is disposed in the installation groove 26. Both the upper top plate 18 and the upper top plate 25 are provided with inclined top seat holes 27 for the inclined top seat 22 to pass through. The upper top plate 25 is provided with a sliding mechanism installation groove 39. A sliding mechanism is installed in the sliding mechanism installation groove 39. Multiple sets of ejector pins 9 are also installed on the upper top plate 25.

[0023] The sliding mechanism mounting groove 39 includes a slider guide block mounting groove 28, in which a slider guide block 13 is installed. The upper part of the slider guide block mounting groove 28 is provided with a through slider mounting groove 29, and a wedge block moving hole 30 is provided on one side of the slider guide block mounting groove 28. The wedge block moving hole 30 communicates with the mounting groove 26, and the wedge block 14 can move along the wedge block moving hole 30.

[0024] The side of the slider 11 that contacts the wedge block 14 includes a flat side 31 and an inclined side 32. The snap-fit ​​groove 12 includes a vertical hole 33 and a horizontal hole 34. The length L3 of the vertical hole 33 is greater than the length L4 of the vertical part 19, and the length L5 of the horizontal hole 34 is greater than the length L6 of the horizontal part 20. The side of the wedge block 14 that contacts the slider 11 includes a wedge plane 35 and a wedge slope 36.

[0025] A spring hole 37 is provided on the side of the slider 11 away from the wedge block 14. A spring 38 is provided in the spring hole 37. One side of the spring 38 abuts against the slider mounting groove 29 to facilitate the reset of the slider 11.

[0026] During the simultaneous movement of the lower ejection mechanism 1 and the upper ejection mechanism 2, the wedge block 14 contacts the slider 11, and the wedge block 14 presses the slider 11 and moves along the slider guide block 13. When the bottom surface of the wedge block 14 contacts the top surface of the lower top plate 16, the lateral part 20 of the hook 10 disengages from the lateral hole 34. At this time, the concave forming part 23 disengages from the undercut 8 of the workpiece 7, and the lower ejection mechanism 1 and the upper ejection mechanism 2 separate. Under the action of the wedge block 14, the lower ejection mechanism 1 remains in this position and no longer moves, while the upper ejection mechanism 2 continues to move, and then ejects the workpiece 7 through the ejector pin 9, so that the workpiece 7 is removed from the mold core and the workpiece 7 is taken out.

[0027] In summary, due to the adoption of the above technical solution, this application uses a two-stage ejection method, which has the following advantages: 1. It can realize fully automated production of molds during the injection molding process, reducing the cost of manual part removal; 2. The product does not stick particularly well to the angled top, resulting in a high yield rate; 3. The ejection method is mechanical ejection, and the structure is stable and practical.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0029] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0030] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the various possible combinations in this application will not be described separately.

[0031] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, and such combinations should also be regarded as the content disclosed in this application.

Claims

1. A mold ejection mechanism, characterized in that, It includes a lower ejection mechanism (1) and an upper ejection mechanism (2). The lower ejection mechanism (1) is fixed with a slanted ejector device (3). The upper ejection mechanism (2) is fixed with multiple sets of ejector pins (9). The lower ejection mechanism (1) is equipped with a hook (10). The top of the hook (10) is connected to a sliding mechanism. The sliding mechanism is installed inside the upper ejection mechanism (2). The sliding mechanism includes a slider (11). The top of the hook (10) is engaged in the engagement groove (12) of the slider (11). The slider (11) is slidably disposed on the slider guide block (13). The outer side of the slider (11) is in contact with the slanted wedge block (14).

2. The mold ejection mechanism according to claim 1, characterized in that, The slider (11) has a spring hole (37) on the side away from the wedge block (14), and a spring (38) is installed in the spring hole (37).

3. The mold ejection mechanism according to claim 1, characterized in that, The lower ejection mechanism (1) includes a lower top plate one (15) and a lower top plate two (16), on which the hook (10) and the inclined ejection device (3) are installed.

4. The mold ejection mechanism according to claim 3, characterized in that, The hook (10) includes a vertical part (19), and a horizontal part (20) is provided at the top of the vertical part (19).

5. The mold ejection mechanism according to claim 4, characterized in that, The top of the transverse portion (20) is provided with a transition slope (21).

6. The mold ejection mechanism according to claim 3, characterized in that, The inclined top device (3) includes an inclined top seat (22) installed on the lower top plate (16), and an inwardly recessed part (23) is installed at the top of the inclined top seat (22); wherein, one inwardly recessed part (23) is installed on each of the inclined top seats (22) on both sides, and two inwardly recessed parts (23) are installed on the remaining inclined top seats (22).

7. A mold ejection mechanism according to claim 6, characterized in that, The upper ejection mechanism (2) includes an upper top plate one (18) and an upper top plate two (25). The bottom of the upper top plate one (18) is provided with an installation groove (26). The lower top plate two (16) is set in the installation groove (26). Both the upper top plate one (18) and the upper top plate two (25) are provided with inclined top seat holes (27) for the inclined top seat (22) to pass through. The upper top plate two (25) is provided with a sliding mechanism installation groove (39). A sliding mechanism is installed in the sliding mechanism installation groove (39). The upper top plate two (25) is also provided with multiple sets of ejector pins (9).

8. A mold ejection mechanism according to claim 7, characterized in that, The sliding mechanism mounting groove (39) includes a slider guide block mounting groove (28). The upper part of the slider guide block mounting groove (28) is provided with a through slider mounting groove (29). A wedge block moving hole (30) is provided on one side of the slider guide block mounting groove (28). The wedge block moving hole (30) is in communication with the mounting groove (26).

9. A mold ejection mechanism according to claim 7, characterized in that, The side of the slider (11) that contacts the wedge block (14) includes a flat side (31) and an inclined side (32). The snap-fit ​​groove (12) includes a vertical hole (33) and a horizontal hole (34). The length L3 of the vertical hole (33) is greater than the length L4 of the vertical part (19), and the length L5 of the horizontal hole (34) is greater than the length L6 of the horizontal part (20).

10. A mold ejection mechanism according to claim 1, characterized in that, The side of the wedge block (14) that contacts the slider (11) includes the wedge plane (35) and the wedge slope (36).

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