Injection mold with ejection structure for plastic processing

Abstract

The utility model discloses a kind of injection mould with ejection structure for plastic processing, including bottom plate, lower die holder and upper die holder, the top of lower die holder is provided with die groove, the bottom of upper die holder is fixedly connected with module, the top of bottom plate is fixedly connected with fixed frame, lower die holder and upper die holder are all located in the inboard of fixed frame, the top of the inboard of fixed frame is fixedly connected with fixed plate, the top of fixed frame is fixedly connected with hydraulic rod, the inner chamber bottom of die groove is movably inserted with first ejection plate, a kind of injection mould with ejection structure for plastic processing of the utility model, by hydraulic rod drives upper die holder away from lower die holder, can drive first ejection plate to move upwards and eject product inside die groove, can also drive first ejection plate reset, and also can eject product that is closely adsorbed in the bottom of module by second ejection plate, three in one, can be all-round ejection to the product of forming, so that processing operation is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing technology, and in particular to an injection mold for plastic processing with an ejector structure. Background Technology

[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain complex-shaped parts. Specifically, it refers to injecting molten plastic into a mold cavity under high pressure using an injection molding machine, followed by cooling and solidification to obtain the molded product. To facilitate demolding of the injection molded parts, ejection structures are often set on the injection mold. However, during the ejection process, most injection molds have a large clamping force between the upper and lower molds, causing the molded part to stick firmly to the mold cavity. Furthermore, there is a certain amount of friction between the mold and the product, making it difficult for the product to completely detach from the mold and hindering its removal. In such cases, manual demolding is required, which greatly reduces work efficiency.

[0003] Chinese Patent Publication No. CN220826270U discloses an ejection mechanism for an irregularly shaped plastic injection mold, comprising: a base plate, a lower mold, a top plate, and a top hole. A first frame is fixed to both ends of the top surface of the base plate. A hydraulic cylinder is installed through the middle of the top of the first frame, and the output end of the hydraulic cylinder is connected to the top plate. An upper mold is located in the middle of the bottom surface of the top plate, embedded inside the lower mold. The lower mold is connected to and installed in the middle of the top surface of the base plate via a support rod. Sliding sleeves are fixed to both ends of the top plate, and sliding rods are inserted into the sliding sleeves. The sliding rods are fixed inside the supports. The hydraulic cylinder pushes the upper mold, causing the second frame to move together. When the second frame rises, it pushes the ejector rod. At this point, the single power output point of the hydraulic cylinder simultaneously lifts both the upper mold and the ejector rod. After the upper mold rises, its ejector rod ejects the molded part already formed in the lower mold, completing a single-power rapid demolding operation.

[0004] However, in actual use, the aforementioned patent only sets an ejection mechanism inside the lower mold. After the plastic product is formed, it may stick tightly to the bottom of the upper mold. In this case, the ejection mechanism of the aforementioned patent cannot meet the usage requirements. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide an injection mold for plastic processing with an ejector structure.

[0006] One of the objectives of this utility model is achieved through the following technical solution: A plastic injection mold with an ejector structure includes a base plate, a lower mold base, and an upper mold base. The top of the lower mold base has a mold groove. A module is fixedly connected to the bottom of the upper mold base. A fixing frame is fixedly connected to the top of the base plate. Both the lower and upper mold bases are located inside the fixing frame. A fixing plate is fixedly connected to the top of the inner side of the fixing frame. A hydraulic rod is fixedly connected to the top of the fixing frame. A first ejector plate is movably inserted into the bottom of the mold groove. A first movable rod is movably inserted into the bottom of the mold groove. One end of the first movable rod is fixedly connected to the first ejector plate, and the other end of the first movable rod is fixedly connected to an elastic sheet. A locking block is fixedly connected to the left side of the elastic sheet. A second ejector plate is movably inserted into the bottom of the module. A second movable rod is movably inserted into the top of the upper mold base. The second movable rod is fixedly connected to the second ejector plate. A reset mechanism is provided at the bottom of the second movable rod, and a through hole is provided on the second movable rod.

[0007] Furthermore, the bottom of the lower mold base is fixedly connected to four support legs, which are arranged in a rectangular array and fixedly connected to the top of the base plate.

[0008] Furthermore, a feed pipe is fixedly connected to the top of the upper mold base, and both the upper mold base and the module are provided with feed channels. The feed channels are interconnected with the feed pipe. A connecting frame is fixedly connected to the top of the upper mold base, and a transmission rod is fixedly connected to the top of the connecting frame. The top end of the transmission rod movably passes through the fixed frame, and the top end of the transmission rod is fixedly connected to the power output end of the hydraulic rod.

[0009] Furthermore, the elastic sheet has an L-shaped cross-section, the elastic sheet is movably perforated, and the bottom of the locking block is in contact with the top of the second movable rod.

[0010] Furthermore, the reset mechanism includes two limiting posts, which are fixedly connected to the bottom of the second movable rod. Two limiting holes are opened on the top of the upper mold base near the right side. The bottom end of the limiting post extends into the inner cavity of the adjacent limiting hole. A spring is sleeved on the outer edge of the limiting post. The top end of the spring is fixedly connected to the second movable rod, and the bottom end of the spring is fixedly connected to the top of the upper mold base.

[0011] Furthermore, two horizontal plates are fixedly connected to the right side of the inner cavity of the fixed frame, and the first movable rod moves through the two horizontal plates.

[0012] Furthermore, the cross-section of the card block is a right-angled triangle, and the fixing plate matches the card block.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model discloses an injection mold for plastic processing with an ejection structure. By using a hydraulic rod to drive the upper mold base away from the lower mold base, it can not only drive the first ejector plate to move upward to eject the product inside the mold groove, but also drive the first ejector plate to reset, and can also eject the product that is tightly attached to the bottom of the mold through the second ejector plate. It achieves three benefits in one go, and can eject the molded product from all directions, making the processing operation more convenient. 2. This utility model discloses an injection mold for plastic processing with an ejector structure. By setting up a horizontal plate, a limiting hole, and a limiting rod, the first movable rod and the second movable rod can both move within a limited trajectory, thereby ensuring the normal operation of the component.

[0014] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This is a top perspective view of the upper mold base of the component of this utility model; Figure 3 This is a front perspective view of the lower mold base of the component of this utility model; Figure 4 This is a front sectional perspective view of the upper mold base of the component of this utility model; Figure 5 This is a front sectional perspective view of the lower mold base of the component of this utility model; Figure 6 This is a front perspective view of the elastic sheet component of this utility model; Figure 7 This is a front sectional perspective view of the limiting hole of the component of this utility model; Figure 8 This is a front perspective view of the second movable rod of the present invention.

[0016] The following are the labels in the diagram: 1. Base plate; 2. Fixing frame; 3. Hydraulic rod; 4. Transmission rod; 5. Fixing plate; 6. Lower mold base; 7. Support leg; 8. Mold groove; 9. Upper mold base; 10. Connecting frame; 11. Module; 12. Feed channel; 13. Feed pipe; 14. First ejector plate; 15. First movable rod; 16. Horizontal plate; 17. Elastic sheet; 18. Locking block; 19. Second ejector plate; 20. Second movable rod; 21. Through hole; 22. Spring; 23. Limiting post; 24. Limiting hole. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0018] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 A plastic injection mold with an ejector structure includes a base plate 1, a lower mold base 6, and an upper mold base 9. The top of the lower mold base 6 has a mold groove 8, and the bottom of the lower mold base 6 is fixedly connected to four support legs 7, which are arranged in a rectangular array. The support legs 7 are fixedly connected to the top of the base plate 1. The bottom of the upper mold base 9 is fixedly connected to a module 11, and the top of the upper mold base 9 is fixedly connected to a feed pipe 13. Both the upper mold base 9 and the module 11 have feed channels 12, which are interconnected with the feed pipe 13. The top of the upper mold base 9 is fixedly connected to a connecting frame 10, and the top of the connecting frame 10 is fixedly connected to a transmission rod 4. The top end of the transmission rod 4 movably passes through the fixed frame 2, and the top end of the transmission rod 4 is fixedly connected to the power output end of the hydraulic rod 3.

[0021] A fixing frame 2 is fixedly connected to the top of the base plate 1. The lower mold base 6 and the upper mold base 9 are both located inside the fixing frame 2. A fixing plate 5 is fixedly connected to the top of the inner side of the fixing frame 2. A hydraulic rod 3 is fixedly connected to the top of the fixing frame 2. A first ejector plate 14 is movably inserted into the bottom of the inner cavity of the mold groove 8. A first movable rod 15 is movably inserted into the bottom of the mold groove 8. Two horizontal plates 16 are fixedly connected to the right side of the inner cavity of the fixing frame 2. The first movable rod 15 movably passes through the two horizontal plates 16. One end of the first movable rod 15 is fixedly connected to the first ejector plate 14. The other end of the first movable rod 15... An elastic sheet 17 is fixedly connected to the end of the module 11. A locking block 18 is fixedly connected to the left side of the elastic sheet 17. A second ejector plate 19 is movably inserted into the bottom of the module 11. A second movable rod 20 is movably inserted into the top of the upper mold base 9. The second movable rod 20 is fixedly connected to the second ejector plate 19. A through hole 21 is opened on the second movable rod 20. The cross-section of the elastic sheet 17 is L-shaped. The elastic sheet 17 moves through the through hole 21. The bottom of the locking block 18 fits against the top of the second movable rod 20. The cross-section of the locking block 18 is a right triangle. The fixing plate 5 matches the locking block 18.

[0022] The bottom of the second movable rod 20 is provided with a reset mechanism, which includes two limiting posts 23. The limiting posts 23 are fixedly connected to the bottom of the second movable rod 20. Two limiting holes 24 are opened at the top of the upper mold base 9 near the right side. The bottom end of the limiting post 23 extends into the inner cavity of the adjacent limiting hole 24. A spring 22 is sleeved on the outer edge of the limiting post 23. The top end of the spring 22 is fixedly connected to the second movable rod 20, and the bottom end of the spring 22 is fixedly connected to the top of the upper mold base 9.

[0023] Working Principle: This utility model discloses an injection mold for plastic processing with an ejector structure. During use, the hydraulic rod 3 is controlled by an external power supply. The hydraulic rod 3 drives the upper mold base 9 to move downward through the transmission rod 4 and the connecting frame 10. The upper mold base 9 drives the second movable rod 20 to move downward. The second movable rod 20 touches the locking block 18 and pushes the locking block 18, causing the elastic sheet 17 to deform. The second movable rod 20 is sleeved on the elastic sheet 17 through the through hole 21. After the second movable rod 20 moves downward away from the locking block 18, the locking block 18 is reset under the action of the elastic sheet 17. The bottom of the locking block 18 and the top of the second movable rod 20 are in contact with each other. At this time, the second movable rod 20 and the first movable rod 15 are assembled together until the top of the upper mold base 9 and the lower mold base 6 are in contact with each other. Then the hydraulic rod 3 stops working.

[0024] Raw material is injected into the mold cavity 8 through the feed pipe 13. The raw material enters the space formed by the mold cavity 8 and the module 11. After the plastic product is formed, the hydraulic rod 3 is controlled by an external power supply. The hydraulic rod 3 drives the upper mold base 9 to move upward through the transmission rod 4 and the connecting frame 10. The second movable rod 20 drives the first movable rod 15 and the clamping block 18 to move upward. The first movable rod 15 drives the first ejector plate 14 to move upward. At this time, the first ejector plate 14 ejects the product inside the mold cavity 8. After the clamping block 18 moves upward and touches the fixed plate 5, the fixed plate 5 squeezes and clamps the product. Block 18 and elastic sheet 17 deform, and block 18 flips to be directly above the perforation 21. At this time, the first movable rod 15, block 18, elastic sheet 17 and first ejector plate 14 reset under the action of gravity. The upper mold base 9 continues to move upward. The fixed plate 5 blocks the second movable rod 20 from moving upward. At the same time, the spring 22 is compressed. At this time, the second ejector plate 19 ejects the product that is tightly attached to the bottom of the module 11. Then the hydraulic rod 3 stops working. When the hydraulic rod 3 drives the upper mold base 9 away from the fixed plate 5, the second movable rod 20 resets under the elastic action of the spring 22.

[0025] The device uses a hydraulic rod 3 to move the upper mold base 9 away from the lower mold base 6. This can move the first ejector plate 14 upward to eject the product inside the mold groove 8, and also move the first ejector plate 14 back to its original position. Furthermore, it can use the second ejector plate 19 to eject the product that is tightly attached to the bottom of the module 11. This three-in-one device can eject the molded product from all directions, making the processing operation more convenient.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A plastic injection mold with an ejector structure, comprising a base plate, a lower mold base, and an upper mold base, wherein a mold groove is formed on the top of the lower mold base, and a module is fixedly connected to the bottom of the upper mold base, characterized in that: A fixed frame is fixedly connected to the top of the base plate. The lower mold base and the upper mold base are both located inside the fixed frame. A fixed plate is fixedly connected to the top of the inner side of the fixed frame. A hydraulic rod is fixedly connected to the top of the fixed frame. A first ejector plate is movably inserted into the bottom of the inner cavity of the mold groove. A first movable rod is movably inserted into the bottom of the mold groove. One end of the first movable rod is fixedly connected to the first ejector plate. An elastic sheet is fixedly connected to the other end of the first movable rod. A locking block is fixedly connected to the left side of the elastic sheet. A second ejector plate is movably inserted into the bottom of the module. A second movable rod is movably inserted into the top of the upper mold base. The second movable rod is fixedly connected to the second ejector plate. A reset mechanism is provided at the bottom of the second movable rod. A through hole is provided on the second movable rod.

2. The injection mold for plastic processing with an ejector structure as described in claim 1, characterized in that: The bottom of the lower mold base is fixedly connected to four support legs, which are arranged in a rectangular array and fixedly connected to the top of the base plate.

3. The injection mold for plastic processing with an ejector structure as described in claim 1, characterized in that: The top of the upper mold base is fixedly connected to a feed pipe. Both the upper mold base and the module are provided with feed channels. The feed channels and the feed pipe are interconnected. The top of the upper mold base is fixedly connected to a connecting frame. The top of the connecting frame is fixedly connected to a transmission rod. The top of the transmission rod moves through the fixed frame. The top of the transmission rod is fixedly connected to the power output end of the hydraulic rod.

4. The injection mold for plastic processing with an ejector structure as described in claim 1, characterized in that: The elastic sheet has an L-shaped cross-section, and the elastic sheet moves through the perforation. The bottom of the locking block and the top of the second movable rod fit together.

5. The injection mold for plastic processing with an ejector structure as described in claim 1, characterized in that: The reset mechanism includes two limiting posts, which are fixedly connected to the bottom of the second movable rod. Two limiting holes are opened on the top of the upper mold base near the right side. The bottom end of the limiting post extends into the inner cavity of the adjacent limiting hole. A spring is sleeved on the outer edge of the limiting post. The top end of the spring is fixedly connected to the second movable rod, and the bottom end of the spring is fixedly connected to the top of the upper mold base.

6. The injection mold for plastic processing with an ejector structure as described in claim 1, characterized in that: Two horizontal plates are fixedly connected to the right side of the inner cavity of the fixed frame, and the first movable rod moves through the two horizontal plates.

7. The injection mold for plastic processing with an ejector structure as described in claim 1, characterized in that: The cross-section of the card block is a right-angled triangle, and the fixing plate and the card block are matched.

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