Nodular cast iron injection head

Abstract

The utility model relates to the technical field of injection heads, and discloses a nodular cast iron injection head which comprises a first hexagonal head, a first internal thread is arranged on the inner wall of the first hexagonal head, a second hexagonal head is fixedly connected to the outer wall of the first hexagonal head, and an injection head body is fixedly connected to the outer wall of the second hexagonal head. A second internal thread is arranged on the inner wall of the second hexagonal head, a mounting groove is formed in one end of the injection head body, and an external thread is arranged on the outer wall of the injection head body. According to the nodular cast iron injection head, the first wear-resisting ring, the second wear-resisting ring and the injection head body are designed to be of a detachable structure which is in threaded connection, when the wear-resisting rings are worn, only the worn wear-resisting rings need to be detached and replaced, the whole injection head body does not need to be replaced, and when the injection head body is damaged, the injection head body can be detached and replaced; and when the end plate is worn, the end plate can be replaced, so that the equipment maintenance cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection head technology, specifically a ductile iron injection head. Background Technology

[0002] Die casting is a precision casting method that uses high pressure to force molten metal into a complex-shaped metal mold. In the die casting process, the injection head is one of the key components, and its performance directly affects the quality of the die casting and production efficiency. The injection head works in conjunction with the die casting cavity, and its working principle is similar to that of the plunger and syringe of a syringe, pushing the molten alloy liquid into the die casting mold. The dimensional clearance between the injection head and the cavity is very small. During use, the cylindrical surface of the injection head is prone to wear. When the wear of the injection head exceeds the allowable clearance, it is scrapped.

[0003] The prior art patent document CN202199754U provides a wear-resistant injection head. This device increases the wear resistance and corrosion resistance of the injection head by providing a groove on the cylindrical side of the injection head and a wear-resistant layer in the groove.

[0004] While the existing technology described above increases the wear resistance of the injection head, it requires complete replacement after the cylindrical surface of the injection head wears down during use, resulting in high replacement costs and failing to meet people's needs. Therefore, we need a ductile iron injection head. Utility Model Content

[0005] The purpose of this invention is to provide a ductile iron injection head to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a ductile iron injection head, comprising a first hexagonal head, the inner wall of the first hexagonal head having a first internal thread, and a second hexagonal head fixedly connected to the outer wall of the first hexagonal head, an injection head body fixedly connected to the outer wall of the second hexagonal head, and the inner wall of the second hexagonal head having a second internal thread, one end of the injection head body having an installation groove, and the outer wall of the injection head body having an external thread, the inner wall of the installation groove being provided with an end plate, the outer wall of the injection head body being threadedly connected with a first wear-resistant ring, and the outer wall of the injection head body being threadedly connected with a second wear-resistant ring, the inner wall of the second wear-resistant ring having a third internal thread, and the outer wall of the second wear-resistant ring being provided with a wear-resistant alloy layer, and the inner wall of the second wear-resistant ring having a hexagonal hole.

[0007] Preferably, the second hexagonal head forms a threaded structure with the threaded head through the second internal thread, and one end of the threaded head extends into the second hexagonal head for connection.

[0008] Preferably, the injection head body forms a threaded structure with the second wear-resistant ring through an external thread, and the external thread and the third internal thread are mutually adapted.

[0009] Preferably, one end of the end plate extends into the mounting groove, and the outer wall of the end plate is in contact with the inner wall of the mounting groove.

[0010] Preferably, the inner wall shape and size of the second wear-resistant ring match the outer wall shape and size of the end plate, and the inner wall of the second wear-resistant ring fits into the outer wall of the end plate.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0012] First, this utility model designs the first wear-resistant ring, the second wear-resistant ring, and the injection head body as a detachable structure with threaded connection. When the wear-resistant ring is worn, only the worn wear-resistant ring needs to be removed and replaced, without replacing the entire injection head body. Secondly, when the injection head body is damaged, it can also be disassembled and replaced. When the end plate is worn, it can also be replaced, which greatly reduces the equipment maintenance cost.

[0013] Secondly, this utility model has a wear-resistant alloy layer on the second wear-resistant ring, which improves wear resistance and can effectively extend the service life of the wear-resistant ring, further saving costs. The second wear-resistant ring is provided with a hexagonal hole, and the operator can insert a hexagonal wrench into it and rotate the second hexagonal head by the wrench to easily disassemble and install the second wear-resistant ring. The operation is simple and easy to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the threaded head and the second hexagonal head structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the mounting groove and end plate structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the injection head body and the first wear-resistant ring of this utility model.

[0018] The components are: 1. First hexagonal head; 2. First internal thread; 3. Threaded head; 4. Second hexagonal head; 5. Injection head body; 6. Second internal thread; 7. Mounting groove; 8. External thread; 9. End plate; 10. First wear-resistant ring; 11. Second wear-resistant ring; 12. Third internal thread; 13. Wear-resistant alloy layer; 14. Hexagonal hole. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-4 As shown, a ductile iron injection head includes a first hexagonal head 1, the inner wall of which has a first internal thread 2, and a second hexagonal head 4 is fixedly connected to the outer wall of the first hexagonal head 1. An injection head body 5 is fixedly connected to the outer wall of the second hexagonal head 4, and the inner wall of the second hexagonal head 4 has a second internal thread 6. One end of the injection head body 5 has a mounting groove 7, and the outer wall of the injection head body 5 has an external thread 8. An end plate 9 is provided on the inner wall of the mounting groove 7. A first wear-resistant ring 10 is threadedly connected to the outer wall of the injection head body 5, and a second wear-resistant ring 11 is threadedly connected to the outer wall of the injection head body 5. The inner wall of the second wear-resistant ring 11 has a third internal thread 12, and the outer wall of the second wear-resistant ring 11 has a wear-resistant alloy layer 13. A hexagonal hole 14 is provided on the inner wall of the second wear-resistant ring 11.

[0021] Through the above technical solution, by designing the first wear-resistant ring 10, the second wear-resistant ring 11, and the injection head body 5 as a threaded, detachable structure, when the wear-resistant rings wear out, only the worn wear-resistant rings need to be removed and replaced, without replacing the entire injection head body 5. Furthermore, when the injection head body 5 is damaged, it can also be disassembled and replaced. Similarly, when the end plate 9 wears, it can also be replaced, greatly reducing equipment maintenance costs. A wear-resistant alloy layer 13 is provided on the second wear-resistant ring 11, improving wear resistance and effectively extending the service life of the wear-resistant ring, further saving costs. A hexagonal hole 14 is provided on the second wear-resistant ring 11, allowing operators to insert a hexagonal wrench and easily disassemble and install the second wear-resistant ring 11 by rotating the second hexagonal head 4. The operation is simple and convenient.

[0022] Specifically, the second hexagonal head 4 forms a threaded structure with the threaded head 3 through the second internal thread 6, and one end of the threaded head 3 extends into the second hexagonal head 4 for connection.

[0023] Through the above technical solution, the threaded head 3 can be disassembled from the second hexagonal head 4 by turning the first hexagonal head 1 with a wrench; by using ductile iron as the main material of the injection head body 5, ductile iron has high strength, high toughness and excellent wear resistance. Its unique spherical graphite structure gives the material good mechanical properties. When subjected to high temperature and high pressure die casting working environment, compared with ordinary cast iron or other metal materials, ductile iron injection head can effectively resist deformation and fracture, and significantly improve service life; using high-power semiconductor laser equipment to clad Fe-based nickel-chromium-cobalt wear-resistant alloy powder material on the outer cylindrical surface of the wear-resistant ring to form a wear-resistant alloy layer 13 is an existing technology.

[0024] Specifically, the injection head body 5 forms a threaded structure with the second wear-resistant ring 11 through the external thread 8, and the external thread 8 and the third internal thread 12 are mutually compatible.

[0025] The above technical solution facilitates the removal and replacement of the second wear-resistant ring 11 from the injection head body 5; the first wear-resistant ring 10 also has a third internal thread 12 and a hexagonal hole 14 on its inner wall; the first internal thread 2 in the first hexagonal head 1 facilitates the connection between the first hexagonal head 1 and the injection rod.

[0026] Specifically, one end of the end plate 9 extends into the mounting groove 7, and the outer wall of the end plate 9 fits against the inner wall of the mounting groove 7.

[0027] The above technical solution facilitates the assembly of the end plate 9 into the mounting groove 7, and makes it easy to replace the end plate 9 when it is damaged.

[0028] Specifically, the inner wall shape and size of the second wear-resistant ring 11 match the outer wall shape and size of the end plate 9, and the inner wall of the second wear-resistant ring 11 fits against the outer wall of the end plate 9.

[0029] With the above technical solution, when the second wear-resistant ring 11 is threaded onto the injection head body 5, the second wear-resistant ring 11 presses against the end plate 9, fixing the end plate 9 in the mounting groove 7.

[0030] In use, when the end plate 9, the first wear-resistant ring 10, and the second wear-resistant ring 11 are worn and need to be replaced, the operator inserts one end of a hexagonal wrench into the hexagonal hole 14 of the second wear-resistant ring 11. By using the wrench to turn the second hexagonal head 4, the second hexagonal head 4 drives the threaded rotation of the injection head body 5, which can remove the second wear-resistant ring 11 from the injection head body 5. After the second wear-resistant ring 11 is removed, the end plate 9 can be removed from the mounting groove 7. The first wear-resistant ring 10 is removed according to the above operation. The worn parts are replaced as needed. When the injection head body 5 needs to be replaced, the first hexagonal head 1 is held by one wrench, and the second hexagonal head 4 is held by another wrench and turned to remove the second hexagonal head 4 from the threaded head 3. The operation of replacing parts is simple and easy to use. By replacing the worn parts, compared with the overall replacement in the prior art, the replacement cost is significantly reduced. This completes all the work. The contents not described in detail in this specification are prior art known to those skilled in the art.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spheroidal graphite cast iron injection head comprising a first hexagonal head (1), characterized in that: The inner wall of the first hexagonal head (1) is provided with a first internal thread (2), and the outer wall of the first hexagonal head (1) is fixedly connected to a second hexagonal head (4). The outer wall of the second hexagonal head (4) is fixedly connected to a pressure head body (5), and the inner wall of the second hexagonal head (4) is provided with a second internal thread (6). One end of the pressure head body (5) is provided with a mounting groove (7), and the outer wall of the pressure head body (5) is provided with an external thread (8). The inner wall of the mounting groove (7) is provided with an end plate (9). The outer wall of the pressure head body (5) is threadedly connected to a first wear-resistant ring (10), and the outer wall of the pressure head body (5) is threadedly connected to a second wear-resistant ring (11). The inner wall of the second wear-resistant ring (11) is provided with a third internal thread (12), and the outer wall of the second wear-resistant ring (11) is provided with a wear-resistant alloy layer (13). The inner wall of the second wear-resistant ring (11) is provided with a hexagonal hole (14).

2. The ductile iron nozzle tip of claim 1 wherein: The second hexagonal head (4) forms a threaded structure with the threaded head (3) through the second internal thread (6), and one end of the threaded head (3) extends into the second hexagonal head (4) for connection.

3. The ductile iron nozzle tip of claim 1 wherein: The injection head body (5) forms a threaded structure with the second wear-resistant ring (11) through the external thread (8), and the external thread (8) and the third internal thread (12) are mutually compatible.

4. The ductile iron injection head according to claim 1, characterized in that: One end of the end plate (9) extends into the mounting groove (7), and the outer wall of the end plate (9) is in contact with the inner wall of the mounting groove (7).

5. The ductile iron injection head according to claim 1, characterized in that: The inner wall shape and size of the second wear-resistant ring (11) match the outer wall shape and size of the end plate (9), and the inner wall of the second wear-resistant ring (11) fits against the outer wall of the end plate (9).

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