Ejection anti-breaking protection mechanism
By designing a thrust-out break-proof protection mechanism for plastic molds, the movement of the thin, weak thimble pin is controlled by the elastic component and the support rod structure, the problem of the thimble being easily broken when the product is ejected in the small characteristic area is solved, and the strength and cost reduction of the fine thimble are improved.
Patent Information
- Application Number
- CN202510214324.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-04-15
AI Technical Summary
When existing plastic molds eject the product, the thimble with large diameter and high strength cannot be effectively used in small characteristic areas, resulting in the increase in the length of the thimble, weak strength and easy to break, and the mold mechanism is complex and the cost is high.
A thrust-out break-proof protection mechanism is designed, including a lower mold fixing plate, a large thimble base and a small thimble base. Position switching is achieved through the driving mechanism, and the elastic component and support rod structure are used to separate and control the movement of the thin thimble to reduce its design length.
Effectively protect the fine thimble, reduce its length, improve strength, separate and control the strokes of the fine thimble and the high-strength thimble, reduce the risk of breakage, save development costs, reduce maintenance costs, and enhance product competitiveness.
Smart Images
Figure CN119820806A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of injection molds, and in particular to an ejection and anti-breakage protection mechanism. Background Art
[0002] Plastic products are widely used in daily life. Plastic products are produced on injection molding machines using plastic molds, and each product corresponds to a set of molds. Ejectors are usually used to eject products on plastic molds. If there are some small features on plastic products, the space on the mold will be small and insufficient to arrange ejectors with large diameter and high strength, such as: horn features, small ribs, etc. Due to the limitations of the product shape structure, these areas can only be arranged with some ejectors with small diameter and weak strength to eject these features. These small ejectors on the mold and the ejectors arranged in other areas of the product are fixed on the ejector plate, and are ejected or returned at the same time during molding. Therefore, the length and stroke of these small ejectors are affected by the stroke of other ejectors on the same set of molds. If the stroke of other ejectors on the same set of molds is large, then the length of these small ejectors will be correspondingly lengthened. These small ejectors are thin and long. Even if a support design is added, the support height will be limited by the stroke of other ejectors. It is very easy to break during molding due to weak strength, low production efficiency and high maintenance costs. If some special mechanisms are used in the mold design to avoid this situation, the mold structure will become complicated and the cost investment will be high. Summary of the invention
[0003] The purpose of the present application is to provide an ejection anti-breakage protection mechanism. Based on the traditional mold structure design, without the use of some special mechanisms, the thin ejector pin is often designed to be very long, and there is a great risk of breaking during use.
[0004] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions: The present application discloses an ejection and anti-breakage protection mechanism, which includes A lower die fixing plate, on which a driving mechanism is arranged; A large ejector seat, on which a thick ejector is installed, and the large ejector seat is switched in position by a driving mechanism; A small ejector seat is provided with a thin ejector arranged in the same direction as the thick ejector, an elastic component is provided between the lower mold fixing plate and the large ejector seat, a supporting rod is provided between the small ejector seat and the elastic component, and the supporting rod passes through a through hole on the large ejector seat. In the initial state of the mechanism, the large ejector seat squeezes the small ejector seat, and the elastic component is in a compressed state.
[0005] According to a further solution of the present application, a male mold plate is provided above the large ejector seat, and a molded product is matched on the male mold plate. The driving mechanism drives the large ejector seat to move toward the male mold plate, and the thick ejector and the thin ejector perform ejection operations.
[0006] In a further solution, the small ejector seat includes an upper fixed block and a lower fixed block which are fixedly connected up and down, the thin ejector is fixed to the upper fixed block, the lower fixed block is fixedly connected to the support rod, a first guide rod is provided on the side of the male template facing the upper fixed block, a first guide sleeve is provided on the upper fixed block, and the small ejector seat moves to make the first guide rod and the first guide sleeve cooperate.
[0007] According to a further solution of the present application, there are multiple support rods, and a matrix of the multiple support rods is installed between the elastic component and the small ejector seat.
[0008] In a further solution of the present application, the elastic component includes a connecting plate, a spring and a second limiting block; A second guide assembly is movably provided on the connecting plate, one side of the second guide assembly passes through the connecting plate and is fixedly connected to the lower mold fixing plate, the spring is sleeved on the second guide assembly between the connecting plate and the lower mold fixing plate, and the spring elastically releases the connecting plate.
[0009] In a further solution, the second guide assembly includes a second guide rod and a second guide sleeve, the second guide sleeve is installed on the connecting plate, the spring is installed on a section of the second guide rod passing through the second guide sleeve and adjacent to the lower mold fixing plate, and a second limit block is fixed to one end of the second guide rod close to the large ejector seat.
[0010] In a further solution, the second guide assembly and the support rod are both provided in plurality, and the plurality of the second guide assemblies and the plurality of the support rods are arranged in a staggered manner.
[0011] In a further solution of the present application, a limiting groove is provided at the bottom of the large ejector seat, and the elastic component is placed in the limiting groove According to a further solution of the present application, a supporting layer is provided at one end of the thin ejector pin, and an end of the supporting layer is fixedly connected to the small ejector pin seat.
[0012] The beneficial effects of this application are: The protective structure in the present application can protect the thin ejector pin. The length of the thin ejector pin is greatly reduced during design, and the ejection movement and stroke of the thin and weak ejector pin and other high-strength ejector pins on the mold are separated and controlled. The thin ejector pin only needs the displacement required for actual movement to increase the length of the thin and weak ejector pin on the mold and enhance the lifting strength, so as to save development costs, reduce maintenance costs, and enhance the competitiveness of the product market.
[0013] A limitable second guide component is provided in the elastic component of the mechanism to ensure the displacement of the fine ejector pin. The structure has strong protection and the ejection accuracy can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic axial cross-sectional view of the male mold plate side in the mold closing state of the ejection anti-breakage protection mechanism in the implementation of this application; Figure 2 for Figure 1 A magnified schematic diagram of the local structure; Figure 3 It is a schematic axial cross-sectional view of the male mold plate side in the mold separation state of the ejection anti-breakage protection mechanism in the implementation of this application; Figure 4 for Figure 3 A magnified schematic diagram of the structure in the middle; Figure 5 It is a structural schematic diagram of the ejection anti-breakage protection mechanism in this application; Figure 6 It is an exploded view of the ejection and anti-breakage protection mechanism in this application.
[0015] in: 1. Thin ejector pin; 2. Upper fixing block; 3. Lower fixing block; 4. First guide rod; 5. First guide sleeve; 6. Support rod; 7. Connecting plate; 8. Second guide rod; 9. Second guide sleeve; 10. Second limit block; 11. Stopper; 12. Spring; 13. Male mold insert; 14. Male mold plate; 15. Upper ejector pin plate; 16. Lower ejector pin plate; 17. Lower mold fixing plate; 18. Return pin; 19. Driving mechanism; 20. Thick ejector pin; 23. Ejector pin plate limit block; 24. Product; 25. Supporting layer. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.
[0017] like Figure 1 and Figure 2As shown, the present embodiment discloses an ejection anti-breakage protection mechanism, which includes a lower mold fixing plate 17, a large ejector seat and a small ejector seat, and the lower mold fixing plate 17 is provided with a driving mechanism 19; a thick ejector 20 is installed on the large ejector seat, and the large ejector seat is switched in position by the driving mechanism 19; in the present embodiment, the lower mold fixing plate 17, the large ejector seat and the small ejector seat are arranged from bottom to top, and the small ejector seat is provided with a thin ejector 1 arranged in the same direction as the thick ejector 20, an elastic component is provided between the lower mold fixing plate 17 and the large ejector seat, and a supporting rod 6 is fixed between the small ejector seat and the elastic component, and the supporting rod 6 passes through the through hole on the large ejector seat; wherein, in the initial state of the mechanism, the large ejector seat is subjected to force to squeeze the small ejector seat, and the elastic component is in a compressed state, and the elastic component in the compressed state is prepared for the subsequent ejection action of the thin ejector 1.
[0018] When in use, the driving mechanism 19 drives the large ejector seat to move upward. At this time, the elastic component is released from the constraint. Under the release of elastic potential energy, the elastic component pushes the support rod 6 to push up the small ejector seat until it is limited by the limiting component in the elastic component. At this time, the large ejector seat can still move, thereby realizing a large displacement of the thick ejector 20 and a small displacement of the small ejector, reducing the design length of the thin ejector 1 and enhancing the strength of use. In actual production, the driving mechanism 19 uses an oil cylinder or a pneumatic cylinder as a driving device.
[0019] As attached Figure 1 As shown, in this embodiment, a male mold plate 14 is arranged above the large ejector seat, and the male mold plate 14 is provided with an embedded male mold insert 13, which is used to facilitate processing and improve exhaust optimization molding. After production, the male mold plate 14 is matched with the molded product 24, and the driving mechanism 19 drives the large ejector seat to move toward the male mold plate 14, and the thick ejector 20 and the thin ejector 1 perform the ejection operation. In actual production, a female mold plate is also arranged above the male mold plate 14, and the product 24 is injection molded and cooled by closing the male and female mold plates. In this embodiment, the two sides of the large ejector seat A return pin 18 is arranged on the side, which is convenient for assembling the parts on the male mold side. When the mold is closed, the return pin 18 plays the role of pressing back the large ejector seat, which is quick and convenient. Usually, the large ejector seat is composed of two plates to facilitate the installation of components. In this embodiment, the large ejector seat is connected by an upper ejector plate 15 and a lower ejector plate 16 fixed by bolts. The upper ejector plate 15 is used to fix multiple thick ejectors 20, and the lower ejector plate 16 abuts the elastic component. Considering the safety of use, the edge of the upper ejector plate 15 is also bolted to fix the ejector plate limit block 23.
[0020] As attached Figure 2As shown, the small ejector seat in this embodiment includes an upper fixed block 2 and a lower fixed block 4 which are fixedly connected up and down, and the two are fixedly connected by bolts. The fine ejector 1 is fixedly installed on the upper fixed block 2, and the lower fixed block 4 is fixedly connected to the support rod 6. The first guide rod 4 is provided on the side of the male template 14 facing the upper fixed block 2, and the first guide sleeve 5 is provided on the upper fixed block 2. When working, the small ejector seat moves to make the first guide rod 4 and the first guide sleeve 5 cooperate. The cooperation between the first guide sleeve 5 and the first guide rod 4 ensures the accuracy of the path of the fine ejector 1 during the moving operation.
[0021] In a further embodiment, the number of the supporting rods 6 is 4, and the 4 supporting rods 6 are installed in a matrix between the elastic component and the small ejector seat. This design ensures the connection strength between the elastic component and the small ejector seat, and ultimately improves the overall strength of the structure.
[0022] As attached Figure 3 , Figure 5 and Figure 6 In this embodiment, the basic release of the elastic component is achieved by the compressed spring 12. The elastic component includes a connecting plate 7, a spring 12 and a second limit block; a second guide component is movably provided on the connecting plate 7, one side of the second guide component passes through the connecting plate 7 and is fixedly connected to the lower mold fixing plate 17, and the spring 12 is sleeved on the second guide component between the connecting plate 7 and the lower mold fixing plate 17, and the spring 12 elastically releases the connecting plate 7; the second guide component in this embodiment includes a second guide rod 8 and a second guide sleeve 9, the second guide sleeve 9 is installed on the connecting plate 7 and longitudinally penetrates the connecting plate 7, the spring 12 is installed on a section of the second guide rod 8 that passes through the second guide sleeve 9 and is adjacent to the lower mold fixing plate 17, and a second limit block is fixed to one end of the second guide rod 8 close to the large ejector seat, and the second limit block can be threaded or riveted on the second guide rod 8.
[0023] In a further embodiment, the positions of the second guide sleeves 9 and the support rods 6 are arranged. During production, four mounting holes are opened in the connecting plate 7 array, and the second guide sleeves 9 are fixed in the mounting holes. At this time, a support rod 6 is arranged between two adjacent second guide sleeves 9. The arrangements are cross-staggered to improve the overall strength of the mechanism.
[0024] In a further embodiment, a limiting groove is provided at the bottom of the large ejector seat, and the connecting plate 7 is placed in the limiting groove when compressed; a stopper 10 and a second limiting block 11 are fixed with bolts on the lower mold fixing plate 17 at the bottom of the limiting groove to prevent the spring 12 from being over-compressed, thereby improving the safety performance of use; in addition, a supporting layer 25 is provided at one end of the thin ejector 1, and the supporting layer 25 serves as a reinforcement layer of the thin ejector 1, which can improve the structural strength of the thin ejector 1 itself, and the end of the supporting layer 25 is fixedly connected to the fixing block 2.
[0025] Specific use; During the overall use of the device, first, the male and female molds are closed. During this process, injection molding and cooling are carried out to obtain the product 24. At this time, the male and female molds are opened. The details are not elaborated here. The product 24 adheres to the male template 14. Subsequently, the ejection operation is carried out. Here, the holes in the product are ejected. The drive mechanism 19 is started to drive the large ejector pin seat to move towards the product 24. The initial spring 12 is compressed. Under the release of the spring 12, the connecting plate 7 pushes the fine ejector pin 1 to also move towards the product 24 until it is limited by the second limit block on the second guide rod 8. At this time, the fine ejector pin 1 meets the requirement of the ejection stroke S2. The drive mechanism 19 continues to drive the thick ejector pin 20 to move until it completes the required ejection stroke S1. Here, S2 < S1, and the fine ejector pin 1 does not need to follow the thick ejector pin 20 for redundant stroke actions, greatly reducing the risk of breakage.
[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.
[0027] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific situations.
Claims
1. An ejection and anti-breakage protection mechanism, characterized in that: include: A lower die fixing plate (17), wherein a driving mechanism (19) is provided on the lower die fixing plate (17); A large ejector seat, on which a thick ejector (20) is mounted, and the position of the large ejector seat is switched by a driving mechanism (19); A small ejector seat is provided on the small ejector seat with a thin ejector pin (1) arranged in the same direction as the thick ejector pin (20); an elastic component is provided between the lower mold fixing plate (17) and the large ejector seat; a support rod (6) is provided between the small ejector seat and the elastic component, and the support rod (6) passes through a through hole on the large ejector seat; wherein, in the initial state of the mechanism, the large ejector seat squeezes the small ejector seat, and the elastic component is in a compressed state.
2. The ejection anti-breakage protection mechanism according to claim 1, characterized in that: A male mold plate (14) is provided above the large ejector seat, and a molded product (24) is matched on the male mold plate (14). The driving mechanism (19) drives the large ejector seat to move toward the male mold plate (14), and the thick ejector pin (20) and the thin ejector pin (1) perform an ejection operation.
3. The ejection anti-breakage protection mechanism according to claim 2, characterized in that: The small ejector seat comprises an upper fixed block (2) and a lower fixed block (3) which are fixedly connected up and down, the thin ejector (1) is fixed to the upper fixed block (2), the lower fixed block (3) is fixedly connected to the support rod (6), a first guide rod (4) is provided on the side of the male template (14) facing the upper fixed block (2), a first guide sleeve (5) is provided on the upper fixed block (2), and the small ejector seat moves so that the first guide rod (4) and the first guide sleeve (5) are matched.
4. The ejection anti-breakage protection mechanism according to claim 1, characterized in that: There are a plurality of support rods (6), and the plurality of support rods (6) are installed in a matrix between the elastic component and the small ejector seat.
5. The ejection anti-breakage protection mechanism according to claim 1, characterized in that: The elastic component comprises a connecting plate (7), a spring (12) and a second limiting block; A second guide assembly is movably provided on the connecting plate (7), one side of the second guide assembly passes through the connecting plate (7) and is fixedly connected to the lower die fixing plate (17), the spring (12) is sleeved on the second guide assembly between the connecting plate (7) and the lower die fixing plate (17), and the spring (12) elastically releases the connecting plate (7).
6. The ejection anti-breakage protection mechanism according to claim 5, characterized in that: The second guide assembly comprises a second guide rod (8) and a second guide sleeve (9), the second guide sleeve (9) being mounted on the connecting plate (7), the spring (12) being mounted on a section of the second guide rod (8) passing through the second guide sleeve (9) and adjacent to the lower die fixing plate (17), and a second limit block being fixed to one end of the second guide rod (8) close to the large ejector seat.
7. The ejection and anti-breakage protection mechanism according to claim 5, characterized in that: The second guide assembly and the support rod (6) are both provided in plurality, and the plurality of the second guide assemblies and the plurality of the support rods (6) are arranged in a staggered manner.
8. The ejection and anti-breakage protection mechanism according to claim 1, characterized in that: A limiting groove is provided at the bottom of the large ejector seat, and the elastic component is placed in the limiting groove.
9. The ejection anti-breakage protection mechanism according to any one of claims 1 to 8, characterized in that: One end of the thin ejector pin (1) is provided with a supporting layer (25), and the end of the supporting layer (25) is fixedly connected to the small ejector pin seat.