Rare earth steel high-hardness thimble structure

Abstract

The utility model discloses a kind of rare earth steel high-hardness thimble structure, belong to die thimble technical field, comprising: base, the upper surface of the base is fixedly installed with first thimble;Adjusting assembly, the adjusting assembly is set to the inside of first thimble;In the utility model, by being provided with adjusting assembly, knurl nut is rotated on second thimble, to drive protective sleeve to carry out synchronous displacement, the movement of protective sleeve can change the overall length of second thimble, in cooperation with first thimble can change the overall length of thimble structure, the overall length of thimble structure is realized adjustable, thimble structure can be adjusted according to need Length, improve the use range of thimble structure, protective sleeve can protect the end of second thimble, reduce the abrasion of second thimble in use process, threaded block and insert rod can realize the disassembly and assembly between first thimble and second thimble, the modularization of thimble structure is realized, and damaged part is accurately replaced for thimble structure.

Description

Technical Field

[0001] This utility model belongs to the field of mold ejector pin technology, and in particular relates to a rare earth steel high hardness ejector pin structure. Background Technology

[0002] Ejector pins are core components in the injection molding field. They are mainly used to push the cooled and solidified product out of the mold. They also have the functions of separating the product, clearing small holes, and stabilizing the inside of the mold. Ejector pins directly contact the product and apply ejection force through their slender rod-shaped structure, separating the plastic part from the mold cavity.

[0003] Most current ejector pin structures use steel pins made of tungsten steel, and most ejector pin structures are integral and cannot be length-adjusted. Therefore, ejector pin structures of different lengths are required to meet different needs. Furthermore, when part of the ejector pin structure is damaged, the entire structure needs to be replaced, as it is not possible to replace the damaged part individually, which increases the cost of using the ejector pin structure. To address this, a rare earth steel high-hardness ejector pin structure is provided. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the current ejector pin structure cannot change its length and that damage to some parts requires complete replacement, which increases the cost of using the ejector pin structure. Therefore, a rare earth steel high-hardness ejector pin structure is proposed.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a rare earth steel high-hardness ejector pin structure, comprising: a base, on which a first ejector pin is fixedly mounted on the upper surface, and a groove is provided on the lower surface of the base; an adjustment component, disposed inside the first ejector pin, which can adjust the length of the ejector pin; and a positioning component, disposed inside the groove, used to position the ejector pin installation; wherein, the adjustment component includes a second ejector pin, on which a threaded block is fixedly mounted on the lower surface, and a plug rod is fixedly mounted on the lower surface of the threaded block; the outer surface of the second ejector pin is provided with threads; the base, the first ejector pin, and the second ejector pin are all made of rare earth steel, which has high hardness.

[0006] As a further description of the above technical solution:

[0007] The upper surface of the first ejector pin is provided with a threaded groove, and the inner wall of the bottom surface of the threaded groove is provided with a slot. The threaded groove and the threaded block are adapted to each other, and the insert rod and the slot are adapted to each other. The insert rod is used to increase the connection depth between the second ejector pin and the first ejector pin to ensure the connection stability of the two.

[0008] As a further description of the above technical solution:

[0009] The upper surface of the second ejector pin is provided with a limiting hole, and a limiting rod is slidably installed on the inner wall of the limiting hole, with one end of the limiting rod extending to the outside of the upper surface of the second ejector pin.

[0010] As a further description of the above technical solution:

[0011] A protective sleeve is fixedly installed at one end of the limiting rod. The protective sleeve is fitted onto the outer surface of the second ejector pin. A knurled nut is rotatably installed on the lower surface of the protective sleeve. The thread on the inner wall of the knurled nut meshes with the thread on the outer surface of the second ejector pin. The limiting rod limits the displacement of the protective sleeve and increases the stability of the connection between the protective sleeve and the second ejector pin. The thread has self-locking properties, so the knurled nut will not be displaced due to the compression of one end of the protective sleeve after adjustment.

[0012] As a further description of the above technical solution:

[0013] The positioning assembly includes a rotating rod and a positioning block. One end of the rotating rod is rotatably connected to the inner wall of the groove. A shaped cam is fixedly installed on the outer surface of the rotating rod. A columnar rod is fixedly installed on the other end of the rotating rod. The shaped cam is a disc with protrusions installed around its perimeter. One side of the protrusion is connected to the disc by an inclined surface. The columnar rod is designed as a square column, which can drive the columnar rod to rotate synchronously when the bolt rotates.

[0014] As a further description of the above technical solution:

[0015] Mounting plates are fixedly installed on both sides of the positioning block, and connecting springs are fixedly installed on the side walls of the mounting plates. One end of the connecting spring is fixedly connected to the inner side wall of the groove. The connecting spring is used to ensure that one end of the positioning block is always in contact with the outer surface of the irregular cam.

[0016] As a further description of the above technical solution:

[0017] The outer surface of the base is provided with four equally spaced slots, the positioning block corresponds to the slots, and a sealing cover is fixedly installed on the inner side wall of the groove. The sealing cover and the groove of the base are detachable and are connected by screws or other detachable methods.

[0018] As a further description of the above technical solution:

[0019] The lower surface of the sealing cover is provided with a threaded hole that penetrates the interior of the sealing plate. A bolt is threaded onto the inner wall of the threaded hole. The upper surface of the bolt is provided with a slot of the same size as the cylindrical rod. One end of the cylindrical rod extends into the slot. There is a certain distance between the bolt and the rotating rod. When the bolt is turned in the threaded hole, it will be displaced. The distance between the bolt and the rotating rod is the displacement space of the bolt when it rotates.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0021] 1. In this utility model, by setting an adjustment component, the knurled nut rotates on the second ejector pin, and under the action of the thread, it will be displaced, thereby driving the protective sleeve to move synchronously. The movement of the protective sleeve can change the total length of the second ejector pin. When it cooperates with the first ejector pin, it can change the total length of the ejector pin structure, realizing the adjustability of the overall length of the ejector pin structure. This allows the ejector pin structure to be adjusted in length as needed, improving the application range of the ejector pin structure. At the same time, the protective sleeve can protect the end of the second ejector pin, reducing the wear of the second ejector pin during use and improving the service life of the ejector pin structure. The threaded block and the insert rod can realize the disassembly and assembly between the first and second ejector pins, realizing the modularity of the ejector pin structure, which facilitates the precise replacement of damaged parts of the ejector pin structure in the later stage.

[0022] 2. In this utility model, a positioning component is provided. The rotation of the bolt drives the rotation of the rotating rod through the columnar rod, and the rotating rod drives the irregular cam to rotate. The irregular cam presses one end of the positioning block, causing the other end of the positioning block to move outward of the base. This causes the other end of the positioning block to be pressed and fixed against the inner wall of the mounting hole of the needle plate, thereby increasing the stability between the ejector pin structure and the mounting hole of the needle plate. This ensures the connection between the ejector pin structure and the needle plate during use. At the same time, the stroke of the positioning block can be adjusted to meet the installation requirements of the ejector pin structure with mounting holes of different sizes, improving the applicability of the ejector pin structure and thus improving its practicality. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a rare earth steel high-hardness ejector pin.

[0024] Figure 2 This is an exploded structural diagram of a rare earth steel high-hardness ejector pin structure.

[0025] Figure 3 This is a schematic diagram of the internal structure of the protective sleeve in a rare earth steel high-hardness ejector pin structure.

[0026] Figure 4 This is an exploded structural diagram of a rare earth steel high-hardness ejector pin structure from another angle.

[0027] Figure 5 In a rare earth steel high hardness ejector pin structure Figure 4 A magnified structural diagram of point A in the middle.

[0028] Figure 6 This is a schematic cross-sectional view of a rare earth steel high-hardness ejector pin structure.

[0029] Legend:

[0030] 1. Base; 2. First ejector pin; 3. Adjustment assembly; 31. Second ejector pin; 32. Threaded block; 33. Insert rod; 34. Limiting hole; 35. Protective sleeve; 36. Knurled nut; 37. Limiting rod; 4. Positioning assembly; 41. Rotating rod; 42. Irregular cam; 43. Columnar rod; 44. Positioning block; 45. Mounting plate; 46. Connecting spring; 5. Sealing cover; 6. Threaded groove; 7. Groove; 8. Threaded hole; 9. Bolt. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] In specific implementation, such as Figures 1-6 As shown, this utility model provides a technical solution: a rare earth steel high-hardness ejector pin structure, including a base 1, a first ejector pin 2 fixedly mounted on the upper surface of the base 1, and a groove 7 provided on the lower surface of the base 1; an adjustment component 3, disposed inside the first ejector pin 2, for adjusting the length of the ejector pin; and a positioning component 4, disposed inside the groove 7, for positioning the ejector pin installation; wherein, the adjustment component 3 includes a second ejector pin 31, a threaded block 32 fixedly mounted on the lower surface of the second ejector pin 31, a plug rod 33 fixedly mounted on the lower surface of the threaded block 32, and a thread on the outer surface of the second ejector pin 31, the first... The upper surface of the ejector pin 2 is provided with a threaded groove 6, and the inner wall of the bottom surface of the threaded groove 6 is provided with a slot. The threaded groove 6 is adapted to the threaded block 32, and the insertion rod 33 is adapted to the slot. The upper surface of the second ejector pin 31 is provided with a limiting hole 34. A limiting rod 37 is slidably installed on the inner wall of the limiting hole 34. One end of the limiting rod 37 extends to the outer surface of the upper surface of the second ejector pin 31, and a protective sleeve 35 is fixedly installed on one end of the limiting rod 37. The protective sleeve 35 is sleeved on the outer surface of the second ejector pin 31, and a knurled nut 36 is rotatably installed on the lower surface of the protective sleeve 35. The thread on the inner wall of the knurled nut 36 meshes with the thread on the outer surface of the second ejector pin 31.

[0033] By rotating the knurled nut 36, under the action of the thread, the knurled nut 36 will move up on the outer surface of the second ejector pin 31. At this time, the knurled nut 36 will drive the protective sleeve 35 to move up synchronously under the limit of the limiting rod 37 and the limiting hole 34. The cooperation between the second ejector pin 31 and the protective sleeve 35 increases the length of the second ejector pin 31, thereby increasing the total length of the ejector pin. By moving the knurled nut 36 above the second ejector pin 31, the body of the second ejector pin 31 is exposed. Then, by rotating the body of the second ejector pin 31, the second ejector pin 31 drives the threaded block 32 to rotate in the threaded groove 6. When the threaded block 32 rotates in the threaded groove 6, under the action of the thread, the threaded block 32 will gradually move to the outside of the threaded groove 6. After the threaded block 32 is completely separated from the threaded groove 6, the insert rod 33 is taken out from the slot, thereby separating the first ejector pin 2 and the second ejector pin 31, realizing the modularization of the ejector pin, and allowing for precise replacement of damaged parts.

[0034] like Figures 4-6 As shown, the positioning component 4 includes a rotating rod 41 and a positioning block 44. One end of the rotating rod 41 is rotatably connected to the inner wall of the groove 7. A shaped cam 42 is fixedly installed on the outer surface of the rotating rod 41. A columnar rod 43 is fixedly installed on the other end of the rotating rod 41. Mounting plates 45 are fixedly installed on both sides of the positioning block 44. A connecting spring 46 is fixedly installed on the side wall of the mounting plate 45. One end of the connecting spring 46 is fixedly connected to the inner side wall of the groove 7. The outer surface of the base 1 is provided with four equidistant slots. The positioning block 44 corresponds to the slots. A sealing cover 5 is fixedly installed on the inner side wall of the groove 7. A threaded hole 8 is provided on the lower surface of the sealing cover 5. The threaded hole 8 penetrates the interior of the sealing plate. A bolt 9 is threadedly installed on the inner wall of the threaded hole 8. A slot with the same size as the columnar rod 43 is provided on the upper surface of the bolt 9. One end of the columnar rod 43 extends into the slot. There is a certain distance between the bolt 9 and the rotating rod 41.

[0035] After the ejector pin passes through the needle plate, the bolt 9 is rotated using the matching tool. At this time, the bolt 9 rotates in the threaded hole 8. Under the action of the thread, the bolt 9 will move a distance into the threaded hole 8. This distance is the distance between the rotating rod 41 and the bolt 9. Since the cylindrical rod 43 is square in shape, when the bolt 9 rotates, it will drive the cylindrical rod 43 to rotate synchronously, thereby driving the rotating rod 41 to rotate in the groove 7. The rotating rod 41 will drive the irregular cam 42 to rotate. As the irregular cam 42 rotates, it will squeeze one end of the positioning block 44. The squeezed positioning block 44 will move out of the base 1 through the slot. At this time, the other end of the positioning block 44 will squeeze the inner wall of the mounting hole on the needle plate, thereby fixing the ejector pin in the mounting hole of the needle plate. When the bolt 9 is tightened in the threaded hole 8, the outermost point of the irregular cam 42 contacts one end of the positioning block 44. At this time, the position where the positioning block 44 moves outside the base 1 is the maximum stroke of the positioning block 44.

[0036] Working principle: By rotating the knurled nut 36, the knurled nut 36 will move up on the outer surface of the second ejector pin 31 under the action of the thread. At this time, the knurled nut 36 will drive the protective sleeve 35 to move up synchronously under the limit of the limiting rod 37 and the limiting hole 34. The cooperation between the second ejector pin 31 and the protective sleeve 35 increases the length of the second ejector pin 31, thereby increasing the total length of the ejector pin. By moving the knurled nut 36 above the second ejector pin 31, the body of the second ejector pin 31 is exposed. Then, by rotating the body of the second ejector pin 31, the second ejector pin 31 drives the threaded block 32 to rotate in the threaded groove 6. After the threaded block 32 is completely disengaged from the threaded groove 6, the insert rod 33 is taken out from the slot, thereby separating the first ejector pin 2 from the second ejector pin 31.

[0037] After the ejector pin passes through the needle plate, the bolt 9 is rotated using the matching tool. At this time, the bolt 9 rotates in the threaded hole 8. Under the action of the thread, the bolt 9 will move a distance into the threaded hole 8. Since the cylindrical rod 43 is square in shape, when the bolt 9 rotates, it will drive the cylindrical rod 43 to rotate synchronously, thereby driving the rotating rod 41 to rotate in the groove 7. The rotating rod 41 will drive the irregular cam 42 to rotate. As the irregular cam 42 rotates, it will squeeze one end of the positioning block 44. The squeezed positioning block 44 will move outward of the base 1 through the slot. At this time, the other end of the positioning block 44 will squeeze the inner wall of the mounting hole on the needle plate, thereby fixing the ejector pin in the mounting hole of the needle plate.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rare earth steel high-hardness ejector pin structure, characterized in that: include: The base (1) has a first pin (2) fixedly installed on its upper surface and a groove (7) provided on its lower surface. Adjustment component (3), which is disposed inside the first ejector pin (2), can adjust the length of the ejector pin; Positioning component (4), which is disposed inside the groove (7) and is used to position the installation of the ejector pin; The adjustment component (3) includes a second ejector pin (31), a threaded block (32) is fixedly installed on the lower surface of the second ejector pin (31), a plug rod (33) is fixedly installed on the lower surface of the threaded block (32), and the outer surface of the second ejector pin (31) is provided with threads.

2. The rare earth steel high-hardness ejector pin structure according to claim 1, characterized in that, The upper surface of the first ejector pin (2) is provided with a threaded groove (6), and the inner wall of the bottom surface of the threaded groove (6) is provided with a slot. The threaded groove (6) is adapted to the threaded block (32), and the insert rod (33) is adapted to the slot.

3. The rare earth steel high-hardness ejector pin structure according to claim 2, characterized in that, The upper surface of the second ejector pin (31) is provided with a limiting hole (34), and a limiting rod (37) is slidably installed on the inner wall of the limiting hole (34). One end of the limiting rod (37) extends to the outside of the upper surface of the second ejector pin (31).

4. The rare earth steel high-hardness ejector pin structure according to claim 3, characterized in that, A protective sleeve (35) is fixedly installed at one end of the limiting rod (37). The protective sleeve (35) is sleeved on the outer surface of the second ejector pin (31). A knurled nut (36) is rotatably installed on the lower surface of the protective sleeve (35). The thread on the inner wall of the knurled nut (36) meshes with the thread on the outer surface of the second ejector pin (31).

5. The rare earth steel high-hardness ejector pin structure according to claim 4, characterized in that, The positioning component (4) includes a rotating rod (41) and a positioning block (44). One end of the rotating rod (41) is rotatably connected to the inner wall of the groove (7). A shaped cam (42) is fixedly installed on the outer surface of the rotating rod (41), and a columnar rod (43) is fixedly installed on the other end of the rotating rod (41).

6. The rare earth steel high-hardness ejector pin structure according to claim 5, characterized in that, Mounting plates (45) are fixedly installed on both sides of the positioning block (44), and connecting springs (46) are fixedly installed on the side walls of the mounting plates (45). One end of the connecting springs (46) is fixedly connected to the inner side wall of the groove (7).

7. The rare earth steel high-hardness ejector pin structure according to claim 6, characterized in that, The outer surface of the base (1) is provided with four equally spaced slots, the positioning block (44) corresponds to the slots, and a sealing cover (5) is fixedly installed on the inner wall of the groove (7).

8. The rare earth steel high-hardness ejector pin structure according to claim 7, characterized in that, The lower surface of the sealing cover (5) is provided with a threaded hole (8), which penetrates the interior of the sealing plate. A bolt (9) is threaded on the inner wall of the threaded hole (8). The upper surface of the bolt (9) is provided with a slot of the same size as the cylindrical rod (43). One end of the cylindrical rod (43) extends into the slot. There is a distance between the bolt (9) and the rotating rod (41).

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