Ejection mechanism of injection mold

Abstract

The utility model discloses an ejection mechanism of an injection mold, which belongs to the technical field of injection molds and comprises a bottom plate, the top surface of the bottom plate is fixedly connected with a support frame, the top surface of the bottom plate is fixedly connected with a plurality of support rods, the top ends of the plurality of support rods are fixedly connected with a lower mold, a hydraulic rod is fixedly mounted on the support frame, and the hydraulic rod is fixedly mounted on the lower mold. The output end of the hydraulic rod extends to the bottom of the supporting frame and is fixedly connected with an upper die. According to the utility model, when a product in the lower mold is demolded, the upper mold moves upwards to drive the U-shaped frame to move upwards, the U-shaped frame drives the pull rod, the sliding block, the lower ejector rod and the lower ejector block to move upwards, and the lower ejector block is used for ejecting and demolding the product in the lower mold; when the upper die moves downwards, the U-shaped frame drives the pull rod and the sliding block to move downwards, the lower ejector rod is pulled through the sliding block, the lower ejector block is reset into the lower notch, the function of resetting the lower ejector block is achieved, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and more specifically to an ejection mechanism of an injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products, and is also a tool for giving plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and molten plastic into a mold cavity under high pressure by an injection molding machine, and obtaining a molded product after cooling and solidification. In order to facilitate the demoulding of injection molded parts, an ejector structure is often provided on the injection mold.

[0003] After searching, the utility model patent with announcement number CN220826270U discloses an ejection mechanism of a special-shaped plastic injection mold, and its technical scheme includes: a bottom plate, a lower mold, a top plate and a top hole, a first frame is fixed at both ends of the top surface of the bottom plate, a hydraulic cylinder is installed through the middle of the top of the first frame, the output end of the hydraulic cylinder is connected to the top plate, an upper mold is arranged in the middle of the bottom surface of the top plate, the upper mold is embedded in the interior of the lower mold, and the lower mold is connected and installed in the middle of the top surface of the bottom plate through a support rod, a sliding sleeve is fixed at both ends of the top plate, a sliding rod is inserted into the interior of the sliding sleeve, and the sliding rod is fixed in the interior of the support; the patent uses the power of the hydraulic cylinder to push the upper mold to move with the second frame, and the second frame will push the ejector rod when it rises, and then the single power output point of the hydraulic cylinder will be reached to lift the upper mold and the ejector rod at the same time, and after the upper mold is lifted, its ejector rod will eject the molded module in the lower mold, completing the single-power rapid demoulding operation.

[0004] However, the above patent has the following shortcomings: when the ejector pin is lifted up by the second frame, it is not convenient to reset the ejector pin; and when demolding, the molded product is easily connected to the upper mold, which makes it inconvenient to demold the product connected to the upper mold. For this reason, we propose an ejection mechanism for the injection mold. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model aims to provide an ejection mechanism for an injection mold.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] The top end of the support rod is connected with the bottom end of the support rod, and the top of the support rod is fixedly connected with the lower mold. A hydraulic rod is fixedly installed on the support frame, and the output end of the hydraulic rod extends to the bottom of the support frame and is fixedly connected to the upper mold. The bottom end of the upper mold extends to the inner cavity of the lower mold. An upper demolding mechanism is arranged on the upper mold. The bottom surface of the inner cavity of the lower mold is provided with a lower recess, and the inner cavity of the lower recess is sleeved with a lower ejector block. The bottom surface of the lower ejector block is fixedly connected with a lower ejector rod, and the bottom end of the lower ejector rod is movably sleeved to the bottom of the lower mold. The bottom surface of the lower ejector rod is provided with a sliding groove, and the inner cavity of the sliding groove is movably sleeved with a sliding block. The bottom surface of the sliding block is fixedly connected with a pull rod, and the bottom surface of the upper mold is fixedly connected with a U-shaped frame, the bottom end of the U-shaped frame is connected to the bottom end of the pull rod, and the top surface of the lower ejector block is flush with the bottom surface of the inner cavity of the lower mold.

[0008] As a preferred solution of the utility model, the upper demolding mechanism includes two gas rods fixedly installed on the top surface of the upper mold and an upper recess opened on the bottom surface of the upper mold, the top ends of the two gas rods are fixedly connected to a support plate, the bottom surface of the support plate is fixedly connected to an upper push rod, the bottom end of the upper push rod is movably sleeved into the inner cavity of the upper recess and fixedly connected to an upper push block, and the bottom surface of the upper push block is flush with the bottom surface of the upper mold.

[0009] As a preferred solution of the utility model, two groups of support seat groups are fixedly connected to the inner wall of the support frame, and sliding rods are fixedly sleeved on the two groups of support seat groups respectively. Sliding tubes are movably sleeved on the outer sides of the two sliding rods respectively, and the side surfaces of the sliding tubes are connected to the side surfaces of the upper mold.

[0010] As a preferred solution of the utility model, an injection tube is fixedly sleeved on the top of the upper mold.

[0011] As a preferred solution of the utility model, the inner wall of the lower recess and the outer side surface of the lower top block are in contact with each other.

[0012] As a preferred solution of the utility model, the inner wall of the upper recess and the outer side surface of the upper top block are in contact with each other.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) In the utility model, when the product in the lower mold is to be demoulded, the upper mold is moved upward to drive the U-shaped frame to move upward, and the U-shaped frame is used to drive the pull rod, the slider, the lower ejector rod and the lower ejector block to move upward, and the lower ejector block is used to lift the product in the lower mold to demould; when the upper mold is moved downward, the U-shaped frame drives the pull rod and the slider to move downward, and the slider is used to pull the lower ejector rod so that the lower ejector block is reset to the lower recess, thereby realizing the function of resetting the lower ejector block.

[0015] (2) In the utility model, through the coordinated use of the gas rod, the upper notch, the push plate, the upper push rod and the upper push block, when the upper mold moves upward, the push plate and the support frame will come into contact, and the support frame will be used to push the push plate. At this time, the gas rod is compressed, and the upper push rod and the upper push block are moved downward, thereby pushing down the product connected to the bottom surface of the upper mold, thereby realizing the function of demolding the lower part of the upper mold, and having good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the back structure of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the utility model;

[0019] Figure 4 For this utility model Figure 3 A is an enlarged schematic diagram;

[0020] Figure 5 For this utility model Figure 3 The enlarged schematic diagram of point B in FIG.

[0021] Figure 6 For this utility model Figure 3 The enlarged schematic diagram is shown in Figure 2.

[0022] Explanation of the numbers in the figure: 1. bottom plate; 2. support rod; 3. lower mold; 4. hydraulic rod; 5. upper mold; 6. U-shaped frame; 7. lower notch; 8. lower ejector block; 9. lower ejector rod; 10. slide groove; 11. slider; 12. pull rod; 13. upper demoulding mechanism; 14. gas rod; 15. upper notch; 16. abutment plate; 17. upper ejector rod; 18. upper ejector block; 19. support frame; 20. support seat assembly; 21. slide rod; 22. slide tube; 23. injection tube. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Example:

[0027] See also Figure 1-6 , an ejection mechanism of an injection mold, comprising a bottom plate 1, a support frame 19 is fixedly connected to the top surface of the bottom plate 1, a plurality of support rods 2 are fixedly connected to the top surface of the bottom plate 1, a lower mold 3 is fixedly connected to the top of the plurality of support rods 2, a hydraulic rod 4 is fixedly installed on the support frame 19, an output end of the hydraulic rod 4 extends to the bottom of the support frame 19 and is fixedly connected to an upper mold 5, the bottom end of the upper mold 5 extends to the inner cavity of the lower mold 3, an upper demoulding mechanism 13 is arranged on the upper mold 5, and a lower mold 3 is provided on the bottom surface of the inner cavity of the lower mold 3 The notch 7, the inner cavity of the lower notch 7 is sleeved with a lower ejector block 8, the bottom surface of the lower ejector block 8 is fixedly connected with a lower ejector rod 9, the bottom end of the lower ejector rod 9 is movably sleeved to the bottom of the lower mold 3, the bottom surface of the lower ejector rod 9 is provided with a slide groove 10, the inner cavity of the slide groove 10 is movably sleeved with a slider 11, the bottom surface of the slider 11 is fixedly connected with a pull rod 12, the bottom surface of the upper mold 5 is fixedly connected with a U-shaped frame 6, the bottom end of the U-shaped frame 6 is connected to the bottom end of the pull rod 12, and the top surface of the lower ejector block 8 is flush with the bottom surface of the inner cavity of the lower mold 3.

[0028] For details, please refer to Figure 1 , Figure 2 and Figure 5 The upper demoulding mechanism 13 includes two gas rods 14 fixedly installed on the top surface of the upper mold 5 and an upper recess 15 opened on the bottom surface of the upper mold 5. The top ends of the two gas rods 14 are fixedly connected to a support plate 16, and the bottom surface of the support plate 16 is fixedly connected to an upper ejector rod 17. The bottom end of the upper ejector rod 17 is movably sleeved into the inner cavity of the upper recess 15 and is fixedly connected to an upper ejector block 18. The bottom surface of the upper ejector block 18 is flush with the bottom surface of the upper mold 5.

[0029] For details, please refer to Figure 1 The inner wall of the support frame 19 is fixedly connected with two groups of support seat groups 20, and the two groups of support seat groups 20 are respectively fixedly sleeved with slide rods 21, and the outer sides of the two slide rods 21 are respectively movably sleeved with slide tubes 22, and the side surfaces of the slide tubes 22 are connected to the side surfaces of the upper mold 5.

[0030] In this embodiment, the upper mold 5 is limited by the cooperation between the sliding rod 21 and the sliding tube 22 to ensure the stability of the upper mold 5.

[0031] For details, please refer to Figure 2 The top of the upper mold 5 is fixedly sleeved with an injection tube 23.

[0032] In this embodiment, molten plastic is injected into the lower mold 3 and the upper mold 5 through the injection tube 23 .

[0033] For details, please refer to Figure 4 The inner wall of the lower recess 7 and the outer side surface of the lower top block 8 are in contact with each other.

[0034] In this embodiment, the stability of the lower top block 8 received in the lower recess 7 is ensured, and the lower recess 7 is blocked by the lower top block 8 received in the lower recess 7 .

[0035] For details, please refer to Figure 5 The inner wall of the upper notch 15 and the outer side surface of the upper top block 18 are in contact with each other.

[0036] In this embodiment, the stability of the upper ejector block 18 received in the inner cavity of the upper recess 15 is ensured, and the upper recess 15 is blocked by the upper ejector block 18 received in the upper recess 15 .

[0037] Working principle: When in use, first start the hydraulic rod 4 to drive the upper mold 5 to move down and close the lower mold 3. At this time, the gas rod 14 is in an extended state, so that the upper ejector rod 17 and the upper ejector block 18 are driven to move up by the abutment plate 16, so that the upper ejector block 18 is placed in the upper recess 15. In addition, the slider 11 at the top of the pull rod 12 drives the lower ejector rod 9 to move down, so that the lower ejector block 8 at the top of the lower ejector rod 9 is placed in the lower recess 7, and then the molten plastic is injected into the lower mold 3 from the injection tube 23, so as to complete the injection molding. Then, when the plastic product is formed, start the hydraulic rod 4 to drive the upper mold 5 to move up, and use the upper mold 5 to drive the U-shaped frame 6 to move up. The U-shaped frame 6 first drives the pull rod 12 and the slider 11 to move upward, and the slider 11 moves upward in the slide groove 10. When the top surface of the slider 11 fits with the top surface of the inner cavity of the slide groove 10, the slider 11 is used to push the lower ejector rod 9 and the lower ejector block 8 to move upward, and the lower ejector block 8 is used to lift the plastic product in the lower mold 3. Finally, when the plastic product and the upper mold 5 move upward together, the abutment plate 16 is driven by the upper mold 5 to abut against the top surface of the inner cavity of the support frame 19. When the upper mold 5 continues to move upward, the gas rod 14 is compressed and shrinks, and the upper ejector rod 17 and the upper ejector block 18 move downward, thereby pushing down the plastic product connected to the bottom surface of the upper mold 5.

[0038] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. An ejection mechanism for an injection mold, comprising a bottom plate (1), characterized in that: The top surface of the bottom plate (1) is fixedly connected to a support frame (19), the top surface of the bottom plate (1) is fixedly connected to a plurality of support rods (2), the top ends of the plurality of support rods (2) are fixedly connected to a lower mold (3), a hydraulic rod (4) is fixedly mounted on the support frame (19), the output end of the hydraulic rod (4) extends to the bottom of the support frame (19) and is fixedly connected to an upper mold (5), the bottom end of the upper mold (5) extends to the inner cavity of the lower mold (3), an upper demoulding mechanism (13) is provided on the upper mold (5), and a lower notch (7) is provided on the bottom surface of the inner cavity of the lower mold (3), and the lower notch (7) The inner cavity is sleeved with a lower ejector block (8), the bottom surface of the lower ejector block (8) is fixedly connected with a lower ejector rod (9), the bottom end of the lower ejector rod (9) is movably sleeved to the bottom of the lower mold (3), the bottom surface of the lower ejector rod (9) is provided with a slide groove (10), the inner cavity of the slide groove (10) is movably sleeved with a slider (11), the bottom surface of the slider (11) is fixedly connected with a pull rod (12), the bottom surface of the upper mold (5) is fixedly connected with a U-shaped frame (6), the bottom end of the U-shaped frame (6) is connected to the bottom end of the pull rod (12), and the top surface of the lower ejector block (8) is flush with the bottom surface of the inner cavity of the lower mold (3).

2. The ejection mechanism of an injection mold according to claim 1, characterized in that: The upper demoulding mechanism (13) comprises two gas rods (14) fixedly mounted on the top surface of the upper mold (5) and an upper recess (15) provided on the bottom surface of the upper mold (5); the top ends of the two gas rods (14) are fixedly connected to abutment plates (16); the bottom surface of the abutment plates (16) is fixedly connected to an upper ejector rod (17); the bottom end of the upper ejector rod (17) is movably sleeved into the inner cavity of the upper recess (15) and fixedly connected to an upper ejector block (18); the bottom surface of the upper ejector block (18) is flush with the bottom surface of the upper mold (5).

3. The ejection mechanism of an injection mold according to claim 1, characterized in that: The inner wall of the support frame (19) is fixedly connected with two groups of support seat groups (20), and the two groups of support seat groups (20) are respectively fixedly sleeved with sliding rods (21), and the outer sides of the two sliding rods (21) are respectively movably sleeved with sliding tubes (22), and the side surfaces of the sliding tubes (22) are connected to the side surfaces of the upper mold (5).

4. The ejection mechanism of an injection mold according to claim 1, characterized in that: An injection tube (23) is fixedly sleeved on the top of the upper mold (5).

5. The ejection mechanism of an injection mold according to claim 1, characterized in that: The inner wall of the lower recess (7) is in contact with the outer side surface of the lower top block (8).

6. The ejection mechanism of an injection mold according to claim 2, characterized in that: The inner wall of the upper notch (15) fits the outer side surface of the upper top block (18).

Images