Ejection mechanism of plastic retainer injection mold
By designing structures such as adjustment plates, top columns and driven rods in injection molds, flexible ejection of the plastic cage is achieved, which solves the problem of strong dislodge caused by adhesions, and improves the product's pass rate and resource utilization efficiency.
Patent Information
- Application Number
- CN202420902432.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-28
AI Technical Summary
During the injection molding process, the adhesion between the plastic cage and the mold cavity and the mold core leads to excessive strong decompression, resulting in product deformation and reduced pass rate.
An injection mold ejection mechanism including a lower mold seat and an upper mold seat is designed. Through the combination structure of the adjustment plate, the top column, the driven rod and the support rod, the flexible ejection of the product is achieved, reducing strong dislosive force, and passing through the upper The movement of the mold seat and the lower mold seat are pulled to reduce the use of the power components.
It effectively reduces the impact of strong decompression on the product, improves the appearance quality and dimensional accuracy of the product, improves the pass rate of the product, and reduces resource losses.
Smart Images
Figure CN222201543U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to an ejection mechanism of an injection mold of a plastic retainer. Background Art
[0002] The cage is a bearing cage, also known as a bearing retainer, which refers to a bearing part that partially wraps all or part of the rolling elements and moves with them. It is used to isolate the rolling elements and usually guide the rolling elements and keep them in the bearing. The plastic cage is a cage that is molded by injection molding. When injecting engineering plastic cages, an injection mold is required.
[0003] At present, the retainer is often back-injected during injection molding. When the retainer is ejected from the mold, it is usually ejected at one time. However, since the retainer is between the mold cavity and the mold core after molding, there is adhesion between the retainer and the mold cavity and the mold core. Direct ejection increases the strong release force on the retainer. When the strong release force is too large, the retainer will be deformed, making the product unqualified after demolding, reducing the product qualification rate. Utility Model Content
[0004] The utility model aims to provide an ejection mechanism of a plastic retainer injection mold to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a plastic retainer injection mold ejection mechanism, comprising a lower mold base and an upper mold base, an adjusting plate is slidably connected inside the lower mold base, a top column is fixedly connected to the top of the adjusting plate and located at the center position, a mold core is fixedly connected to the top of the top column, a mold cavity is penetrated through the top of the lower mold base and located at the center position, the top of the top column is plugged into the mold cavity, two adjusting grooves are provided on the outer surface of the top column, a receiving groove is provided on the top of the top column, a square through hole is penetrated through the bottom surface of the receiving groove and located at the position of the two adjusting grooves, ejector rods are slidably connected inside the two receiving grooves, support rods are slidably connected inside the two square through holes, top rings are fixedly connected to the tops of the two support rods, the outer surface of the top ring is plugged into the inside of the receiving groove, a driven rod is rotatably connected to the top of the adjusting plate and located at one side of the two adjusting grooves, and one end of the two driven rods is respectively in contact with the bottom ends of the two ejector rods.
[0006] As a further preferred embodiment of the present technical solution, connecting plates are fixedly connected on both sides of the adjustment plate, sliding rods are fixedly connected on one side of the two connecting plates and near the upper edge, pull plates are fixedly connected on both sides of the upper mold base, sliding through holes are penetrated on one side of the two pull plates, and the inner surfaces of the two sliding through holes are respectively slidably connected to the outer surfaces of the two sliding rods.
[0007] As a further preferred embodiment of the present technical solution, circular through holes are provided at the top of the adjustment plate and near the four corners, and limiting rods are slidably connected to the inside of the four circular through holes, and the top of the limiting rods is fixedly connected to the inner top surface of the lower mold base.
[0008] As a further preferred embodiment of the present technical solution, the outer surfaces of the four limiting rods are sleeved with return springs, the top ends of the four return springs are fixedly connected to the inner top surface of the lower die base, and the bottom ends of the four return springs are fixedly connected to the top surface of the adjustment plate.
[0009] As a further preferred embodiment of the present technical solution, positioning grooves are provided at the top of the lower mold base and near the four corners, and positioning columns are fixedly connected at the bottom of the upper mold base and near the four corners, and the outer surfaces of the four positioning columns are respectively plugged into the inside of the four positioning grooves.
[0010] As a further preferred embodiment of the technical solution, both side walls inside the two adjustment grooves are provided with limiting grooves, both sides of the two push rods are fixedly connected with limiting rods, and the outer surfaces of the four limiting rods are respectively slidably connected to the inside of the four limiting grooves.
[0011] As a further preferred embodiment of the present technical solution, the inner surface of the mold cavity is interference fit with the outer surface of the top column, and the outer surface of the top ring is interference fit with the inner surface of the receiving groove.
[0012] The utility model provides a plastic retainer injection mold ejection mechanism, which has the following beneficial effects:
[0013] (1) The utility model moves the adjusting plate so that the ejector pin slides in the mold cavity, and the product on the mold core is ejected for the first time, so that the product is separated from the mold cavity. During the movement of the adjusting plate, the two driven rods contact the inner bottom surface of the lower mold base, and rotate under the drive of the subsequent adjusting plate, and push the ejector pins in the two adjusting grooves to slide. During the movement of the ejector pins, the two supporting rods are pushed to drive the ejector ring to move and eject the product for the second time and fall off, thereby realizing the flexible ejection of the plastic retainer, effectively reducing the strong ejection force, greatly reducing the influence of the strong ejection process on the appearance quality and size of the product, and improving the qualified rate of the product after demolding.
[0014] (2) The utility model drives the pull plate to pull the adjustment plate during the separation of the upper die base and the lower die base, thereby effectively utilizing the movement generated when the upper die base is separated, reducing the use of power components and reducing resource loss during the product production process. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the upper die base and the lower die base of the utility model when they are separated;
[0017] Figure 3 It is a schematic diagram of the internal structure of the lower die base of the utility model;
[0018] Figure 4 It is a cross-sectional view of the internal structure of the top column of the utility model.
[0019] In the figure: 1. lower die base; 2. upper die base; 3. die cavity; 4. die core; 5. adjustment plate; 6. ejector column; 7. adjustment slot; 8. ejector rod; 9. driven rod; 10. square through hole; 11. support rod; 12. ejector ring; 13. storage slot; 14. limit rod; 15. limit slot; 16. circular through hole; 17. limit rod; 18. return spring; 19. positioning column; 20. positioning slot; 21. connecting plate; 22. pull plate; 23. sliding through hole; 24. slide rod. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0021] The utility model provides a technical solution: Figure 1-4 As shown, in this embodiment, a plastic retainer injection mold ejection mechanism includes a lower mold base 1 and an upper mold base 2, an adjusting plate 5 is slidably connected inside the lower mold base 1, a top column 6 is fixedly connected to the top of the adjusting plate 5 and located at the center, a mold core 4 is fixedly connected to the top of the top column 6, a mold cavity 3 is penetrated through the top of the lower mold base 1 and located at the center, the top of the top column 6 is plugged into the mold cavity 3, two adjusting grooves 7 are formed on the outer surface of the top column 6, a receiving groove 13 is formed on the top of the top column 6, a square through hole 10 is penetrated on the bottom surface of the receiving groove 13 and located at the position of the two adjusting grooves 7, and a push rod 8 is slidably connected inside the two receiving grooves 13, and two The square through holes 10 are all slidably connected to support rods 11, and top rings 12 are fixedly connected to the tops of the two support rods 11. The outer surface of the top ring 12 is plugged into the inside of the storage groove 13. A driven rod 9 is rotatably connected to the top of the adjustment plate 5 and located on one side of the two adjustment grooves 7. One end of the two driven rods 9 is in contact with the bottom ends of the two ejector rods 8 respectively. By setting the ejector column 6, the product can be ejected for the first time, so that the product is separated from the inside of the mold cavity 3. By setting the ejector ring 12, the product on the mold core 4 can be ejected for the second time, so that the product is separated from the mold core. By setting the driven rod 9, the ejector rod 8 can be driven to move during the rotation of the driven rod.
[0022] like Figure 3 and Figure 4As shown, connecting plates 21 are fixedly connected on both sides of the adjustment plate 5, and sliding rods 24 are fixedly connected on one side of the two connecting plates 21 and near the upper edge position, and pulling plates 22 are fixedly connected on both sides of the upper mold base 2, and sliding holes 23 are opened on one side of the two pulling plates 22. The inner surfaces of the two sliding holes 23 are respectively slidably connected to the outer surfaces of the two sliding rods 24. By setting the sliding holes 23 and the sliding rods 24, the adjustment plate 5 can achieve delayed movement when the upper mold base 2 is pulled, thereby increasing the gap between the upper mold base 2 and the lower mold base 1, which is beneficial to the lower mold.
[0023] like Figure 4 As shown, circular through holes 16 are provided at the top of the adjustment plate 5 and near the four corners, and limiting rods 17 are slidably connected inside the four circular through holes 16. The top of the limiting rods 17 is fixedly connected to the top surface of the lower mold base 1. By setting the limiting rods 17, the stability of the adjustment plate 5 during movement can be ensured to prevent skewing.
[0024] like Figure 2 and Figure 3 As shown, the outer surfaces of the four limiting rods 17 are all sleeved with return springs 18, the top ends of the four return springs 18 are fixedly connected to the inner top surface of the lower die base 1, and the bottom ends of the four return springs 18 are fixedly connected to the top surface of the adjustment plate 5. By setting the return springs 18, the adjustment plate 5 can fall stably when the upper die base 2 and the lower die base 1 are merged.
[0025] like Figure 2 and Figure 3 As shown, positioning grooves 20 are provided at the top of the lower mold base 1 and near the four corners, and positioning columns 19 are fixedly connected at the bottom of the upper mold base 2 and near the four corners. The outer surfaces of the four positioning columns 19 are respectively plugged into the four positioning grooves 20. By setting the positioning columns 19 and the positioning grooves 20, the upper mold base 2 and the lower mold base 1 can be positioned to prevent skewing when merging.
[0026] like Figure 2 and Figure 3 As shown, limiting grooves 15 are provided on both side walls inside the two adjustment grooves 7, limiting rods 14 are fixedly connected on both sides of the two push rods 8, and the outer surfaces of the four limiting rods 14 are slidably connected to the inside of the four limiting grooves 15 respectively. By setting the limiting rods 14 and the limiting grooves 15, it is possible to prevent the push rods 8 from being skewed during the lifting process.
[0027] like Figure 1 As shown, the inner surface of the mold cavity 3 and the outer surface of the top column 6 are interference fit, and the outer surface of the top ring 12 and the inner surface of the receiving groove 13 are interference fit, so as to improve the sealing performance.
[0028] The utility model provides a plastic retainer injection mold ejection mechanism, the specific working principle is as follows:
[0029] When demolding the product, the upper mold base 2 and the lower mold base 1 are separated. During the separation process, the upper mold base 2 drives the pull plate 22 to move together, and after moving a certain distance, drives the adjustment plate 5 to move. As the adjustment plate 5 moves, the ejector column 6 is driven to slide in the mold cavity 3, and the product on the mold core 4 is ejected for the first time, so that the product is separated from the mold cavity 3. During the subsequent movement of the adjustment plate 5, the two driven rods 9 contact the inner bottom surface of the lower mold base 1, and are squeezed and rotated under the drive of the adjustment plate 5, pushing the ejector rods 8 in the two adjustment grooves 7 to slide. During the movement of the ejector rod 8, the two support rods 11 are pushed to drive the ejector ring 12 to move and eject the product for the second time and make it fall off.
[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A plastic retainer injection mold ejection mechanism, comprising a lower mold base (1) and an upper mold base (2), characterized in that: An adjusting plate (5) is slidably connected to the interior of the lower die base (1); a top column (6) is fixedly connected to the top of the adjusting plate (5) and located at the center; a mold core (4) is fixedly connected to the top of the top column (6); a mold cavity (3) is penetrated through the top of the lower die base (1) and located at the center; the top of the top column (6) is plugged into the interior of the mold cavity (3); two adjusting grooves (7) are provided on the outer surface of the top column (6); a receiving groove (13) is provided on the top of the top column (6); the bottom surface of the receiving groove (13) and located at the two adjusting grooves (7) A square through hole (10) is provided at the position, and a top rod (8) is slidably connected to the inside of the two receiving grooves (13), and a support rod (11) is slidably connected to the inside of the two square through holes (10). The top ends of the two support rods (11) are fixedly connected to top rings (12), and the outer surface of the top ring (12) is plugged into the inside of the receiving groove (13). A driven rod (9) is rotatably connected to the top of the adjustment plate (5) and located at a position on one side of the two adjustment grooves (7), and one end of the two driven rods (9) is respectively in contact with the bottom ends of the two top rods (8).
2. The ejection mechanism of a plastic retainer injection mold according to claim 1, characterized in that: The adjusting plate (5) is fixedly connected to connecting plates (21) on both sides, and sliding rods (24) are fixedly connected to one side of the two connecting plates (21) and near the upper edge. The upper die base (2) is fixedly connected to pulling plates (22) on both sides, and sliding through holes (23) are opened through one side of the two pulling plates (22). The inner surfaces of the two sliding through holes (23) are respectively slidably connected to the outer surfaces of the two sliding rods (24).
3. The ejection mechanism of a plastic retainer injection mold according to claim 2, characterized in that: Circular through holes (16) are provided at the top of the adjustment plate (5) and near the four corners. Limiting rods (17) are slidably connected inside the four circular through holes (16). The top of the limiting rods (17) is fixedly connected to the inner top surface of the lower die base (1).
4. The ejection mechanism of a plastic retainer injection mold according to claim 3, characterized in that: The outer surfaces of the four limiting rods (17) are all sleeved with return springs (18), the top ends of the four return springs (18) are fixedly connected to the inner top surface of the lower die base (1), and the bottom ends of the four return springs (18) are fixedly connected to the top surface of the adjustment plate (5).
5. The ejection mechanism of a plastic retainer injection mold according to claim 4, characterized in that: Positioning grooves (20) are provided at the top of the lower die base (1) and near the four corners, and positioning columns (19) are fixedly connected at the bottom of the upper die base (2) and near the four corners, and the outer surfaces of the four positioning columns (19) are respectively plugged into the inside of the four positioning grooves (20).
6. The ejection mechanism of a plastic retainer injection mold according to claim 1, characterized in that: The inner side walls of the two adjustment grooves (7) are both provided with limit grooves (15), the two sides of the two push rods (8) are both fixedly connected with limit rods (14), and the outer surfaces of the four limit rods (14) are respectively slidably connected to the inside of the four limit grooves (15).
7. The ejection mechanism of a plastic retainer injection mold according to claim 6, characterized in that: The inner surface of the mold cavity (3) and the outer surface of the top column (6) are in interference fit, and the outer surface of the top ring (12) and the inner surface of the receiving groove (13) are in interference fit.