Die ejector pin convenient to disassemble and assemble

Abstract

The utility model discloses a mold ejector pin convenient to disassemble and assemble. The mold ejector pin comprises an ejector rod and an ejector pin head which is arranged at the end part of the ejector rod and is used for ejecting a product, a positioning hole and a first mounting groove surrounding the positioning hole are formed in the center of one end, close to the head of the ejector pin, of the ejector rod, and a first magnet is arranged in the first mounting groove; the center of one end, close to the ejector rod, of the ejector pin head is provided with a positioning shaft which is in positioning fit with the positioning hole, and a second mounting groove which is formed outside the positioning shaft in a surrounding manner and corresponds to the first mounting groove, and a second magnet which is mutually attracted with the first magnet is arranged in the second mounting groove. The positioning shaft is matched with the positioning hole, so that the head of the ejector pin can be quickly positioned on the ejector rod, the head of the ejector pin and the ejector rod can be prevented from being staggered and deviated during subsequent ejection work, and the structural stability is improved; and in cooperation with mutual attraction of the first magnet and the second magnet, the head of the ejector pin can be quickly fixed to the ejector rod, and disassembly and assembly are very convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould ejector pin technical field, more specifically, relate to a mould ejector pin of convenient dismounting. BACKGROUND

[0002] Mould ejector pin is indispensable assembly in injection moulding, die casting and other forming processes, and is mainly used for pushing the formed product out of the mould cavity.

[0003] The ejector pin head of mould ejector pin refers to the part of the ejector pin directly contacting the product, that is, the top end of the ejector pin. This part directly acts on the surface of the formed part and bears a large pressure during demoulding. According to the shape and requirements of different products, different forms (such as flat head, round head or special shape) of ejector pin head may be needed to ensure the best demoulding effect and avoid damage to the product.

[0004] In the prior art, most of the mould ejector pins are of integral structure, and the entire mould ejector pin needs to be disassembled to replace the ejector pin head part, which is troublesome in the disassembly and assembly process. UTILITY MODEL CONTENTS

[0005] In view of the problems existing in the prior art, the utility model aims to provide a mould ejector pin convenient to disassemble and assemble.

[0006] To solve the above problems, the utility model adopts the following technical scheme.

[0007] A mould ejector pin convenient to disassemble and assemble comprises a top rod and an ejector pin head arranged at the end of the top rod for ejecting the product, wherein one end of the top rod close to the ejector pin head is provided with a positioning hole and a first mounting groove arranged around the outside of the positioning hole, and the first mounting groove is provided with a first magnet; one end of the ejector pin head close to the top rod is provided with a positioning shaft matched with the positioning hole, and a second mounting groove is arranged around the outside of the positioning shaft and corresponds to the first mounting groove, and the second mounting groove is provided with a second magnet attracted to the first magnet.

[0008] Preferably, the first magnet and the second magnet do not exceed the first mounting groove and the second mounting groove respectively.

[0009] Preferably, the first mounting groove and the second mounting groove are annular structures, and the first magnet and the second magnet are also annular structures.

[0010] Preferably, the opposite surfaces of the first magnet and the second magnet are provided with a partition.

[0011] Preferably, the first magnet exceeds the first mounting groove and is embedded into the second mounting groove, or the second magnet exceeds the second mounting groove and is embedded into the first mounting groove.

[0012] Preferably, the positioning shaft outer wall is provided with an elastic layer; the diameter of the positioning shaft is slightly smaller than the diameter of the positioning hole, and the diameter of the elastic layer is slightly larger than the diameter of the positioning hole.

[0013] Preferably, the elastic layer is provided with a plurality of intervals along the axial direction of the positioning shaft, and the inner wall of the positioning hole is outwardly provided with a plurality of ring grooves matched with the elastic layer; a convex ring is formed between adjacent ring grooves and is clamped between adjacent elastic layers.

[0014] Preferably, the detachable mold ejector pin further comprises a fixing head arranged at one end of the ejector rod away from the ejector pin head.

[0015] Compared with the prior art, the utility model has the beneficial effects of:

[0016] Through cooperation of the positioning shaft and the positioning hole, the ejector pin head can be quickly positioned on the ejector rod, and dislocation and deviation of the ejector pin head and the ejector rod during subsequent ejection work can be prevented, thereby improving structural stability; in cooperation with mutual attraction of the first magnet and the second magnet, the ejector pin head can be quickly fixed on the ejector rod, and disassembly and assembly are very convenient; the first installation groove and the second installation groove are designed around the positioning hole and the positioning shaft, so the first magnet and the second magnet are also arranged around, thereby uniformly magnetically attracting the periphery of the positioning hole and the positioning shaft, and stability of connection of the ejector pin head and the ejector rod is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a combined structure schematic view of the utility model;

[0018] Figure 2 It is a split structure schematic view of the ejector rod and the ejector pin head of the utility model

[0019] Figure 3 It is a partial sectional view of the utility model;

[0020] Figure 4 It is a cooperation schematic view of the first magnet and the second magnet of the utility model;

[0021] Figure 5 It is a cooperation schematic view of another embodiment of the first magnet and the second magnet of the utility model.

[0022] Explanation of reference numerals in the drawing:

[0023] 1, ejector rod; 2, ejector pin head; 3, positioning hole; 31, ring groove; 32, convex ring; 4, positioning shaft; 41, elastic layer; 5, first installation groove; 6, second installation groove; 7, first magnet, 8, second magnet; 9, spacer; 10, fixing head. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0025] Reference Figures 1-4 A mold ejector pin convenient to disassemble, comprising a ejector rod 1 and an ejector pin head 2 arranged at the end of the ejector rod 1 for ejecting products; the center of the end of the ejector rod 1 close to the ejector pin head 2 is provided with a positioning hole 3 and a first mounting groove 5 arranged around the outside of the positioning hole 3, and the first mounting groove 5 is provided with a first magnet 7; the center of the end of the ejector pin head 2 close to the ejector rod 1 is provided with a positioning shaft 4 matched with the positioning hole 3, and a second mounting groove 6 arranged around the outside of the positioning shaft 4 and corresponding to the first mounting groove 5, and the second mounting groove 6 is provided with a second magnet 8 attracted to the first magnet 7.

[0026] It can be understood that the ejector pin head 2 is a component for ejecting products in the mold, which can be cylindrical or cubic according to the needs of the products, but is not limited thereto. The positioning shaft 4 and the positioning hole 3 are a positioning structure of shaft hole cooperation, which can be the cooperation of round hole and round rod, or the cooperation of square hole and square rod, etc., but is not limited thereto. The first mounting groove 5 and the second mounting groove 6 can be an entire circular ring or square ring structure, or a structure distributed by multiple intervals, but are not limited thereto. The first magnet 7 and the second magnet 8 are strong magnets, and the magnetic force thereof only needs to ensure that the product is ejected, and the ejector pin head 2 can be pulled back without falling off.

[0027] In this way, during installation, the positioning shaft 4 on the ejector pin head 2 is first inserted into the positioning hole 3 on the ejector rod 1, the ejector pin head 2 can be quickly positioned on the ejector rod 1, and the misalignment and deviation of the ejector pin head 2 and the ejector rod 1 during subsequent ejection work can be prevented, thereby improving the structural stability; in cooperation with the mutual attraction of the first magnet 7 and the second magnet 8, the ejector pin head 2 can be quickly fixed on the ejector rod 1; during disassembly, the ejector pin can be directly pulled out, and the disassembly and assembly are very convenient; the first mounting groove 5 and the second mounting groove are designed around the positioning hole 3 and the positioning shaft 4, so the first magnet 7 and the second magnet 8 are also arranged around, thereby evenly magnetizing the periphery of the positioning hole 3 and the positioning shaft 4, and ensuring the stability of the connection between the ejector pin head 2 and the ejector rod 1.

[0028] In some embodiments, reference Figures 2-4, the first magnet 7 and the second magnet 8 do not exceed the first installation slot 5 and the second installation slot 6 respectively. Here, it is only necessary to set the depth of the first installation slot 5 and the second installation slot 6 to be greater than the height of the first magnet 7 and the second magnet 8 respectively. In this way, direct contact of the first magnet 7 and the second magnet 8 can be prevented, and wear can be prevented.

[0029] In some embodiments, the first installation slot 5 and the second installation slot 6 are both annular structures, and the first magnet 7 and the second magnet 8 are also annular structures. The annular structure can correspond to the circular structure of the end face of the ejector rod 1, improving the uniformity of the mutual attraction of the first magnet 7 and the second magnet 8 and the stability of the overall connection.

[0030] In some embodiments, the opposite faces of the first magnet 7 and the second magnet 8 are each provided with a partition 9. The partition 9 is a component for separating the first magnet 7 and the second magnet 8 from each other, and can be, for example, metal, plastic, elastic rubber, cloth, etc., but is not limited thereto. In this way, direct contact and wear between the first magnet 7 and the second magnet 8 can be prevented, and durability can be improved.

[0031] In some embodiments, the first magnet 7 exceeds the first installation slot 5 and is embedded in the second installation slot 6, or, with reference to Figure 5 , the second magnet 8 exceeds the second installation slot 6 and is embedded in the first installation slot 5. This is a magnet-embedded magnetic attraction structure, which not only has a magnetic attraction connection function, but also has a mounting guide and positioning function.

[0032] In some embodiments, with reference to Figures 2-3 , an elastic layer 41 is provided on the outer wall of the positioning shaft 4; the diameter of the positioning shaft 4 is slightly smaller than the diameter of the positioning hole 3, and the diameter of the elastic layer 41 is slightly larger than the diameter of the positioning hole 3. As can be understood, the elastic layer 41 is a component with elastic deformation function, which can be, for example, rubber or silicone, etc., but is not limited thereto. In this way, by inserting the positioning shaft 4 into the positioning hole 3, the elastic layer 41 will be compressed due to the extrusion effect, and conversely, the elastic layer 41 can elastically abut against the outer wall of the positioning hole 3 to improve the friction force, cooperating with the magnetic attraction, which is sufficient to ensure that the ejector rod head 2 is pulled back to the reset position when the mold ejector rod is retracted.

[0033] In some embodiments, a plurality of elastic layers 41 are arranged axially along the positioning shaft 4, and a plurality of ring grooves 31 are provided on the inner wall of the positioning hole 3 and are embedded with the elastic layers 41; a convex ring 32 is formed between adjacent ring grooves 31, and the convex ring 32 is clamped between adjacent elastic layers 41. In this way, after the positioning shaft 4 is inserted into the positioning hole 3, the elastic layer 41 is embedded in the ring groove 31, and the ring groove 31 can limit the elastic layer 41, and also has a connection function for the ejector rod head 2 and the ejector rod 1. When pulled out, the elastic layer 41 can be directly pulled out of the ring groove 31 because the elastic layer 41 can be deformed.

[0034] In some embodiments, the detachable mold ejector pin further comprises a fixed head 10 arranged at the end of the ejector rod 1 away from the pin head 2. The fixed head 10 is a component for connecting with a base mold and fixing the entire mold ejector pin, which can be a round head, a square head, a threaded head, etc., but is not limited thereto.

[0035] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art, according to the technical scheme and the improved conception of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A mold ejector pin which is easily disassembled, characterized by, The utility model discloses a kind of easily disassembled mould ejector pins, including top rod (1) and the ejector pin head (2) for setting at the end of the top rod (1) to be used to push out product;The top rod (1) is close to the center of the one end of the ejector pin head (2) and is provided with positioning hole (3), and first installation slot (5) is arranged around the outside of the positioning hole (3), and first magnet (7) is arranged in the first installation slot (5);The ejector pin head (2) is close to the center of the one end of the top rod (1) and is provided with positioning shaft (4) with the positioning cooperation of positioning hole (3), and second installation slot (6) is arranged around the outside of the positioning shaft (4) and corresponds with first installation slot (5), and second magnet (8) is arranged in the second installation slot (6) and is mutually attracted with the first magnet (7).

2. A mold ejector pin according to claim 1, wherein, The first magnet (7) and the second magnet (8) do not exceed the first installation slot (5) and the second installation slot (6) respectively.

3. A mold ejector pin according to claim 2, wherein, The first installation slot (5) and the second installation slot (6) are annular structures, and the first magnet (7) and the second magnet (8) are also annular structures.

4. A mold ejector pin according to claim 3, wherein, The opposite faces of the first magnet (7) and the second magnet (8) are each provided with a partition layer (9).

5. The easily removable mold pin according to claim 1, wherein The first magnet (7) exceeds the first installation slot (5) and is embedded into the second installation slot (6), or the second magnet (8) exceeds the second installation slot (6) and is embedded into the first installation slot (5).

6. A mold ejector pin according to claim 1, wherein, An elastic layer (41) is arranged on the outer wall of the positioning shaft (4), the diameter of the positioning shaft (4) is slightly smaller than the diameter of the positioning hole (3), and the diameter of the elastic layer (41) is slightly larger than the diameter of the positioning hole (3).

7. A mold ejector pin according to claim 6, wherein, The elastic layer (41) is arranged axially along the positioning shaft (4), and a plurality of ring grooves (31) are arranged on the inner wall of the positioning hole (3) and embedded with the elastic layer (41).

8. The easily removable mold pin according to claim 1, wherein The easily disassembled mould ejector pin further includes a fixing head (10) arranged at the end of the top rod (1) away from the ejector pin head (2).

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