Efficient nitriding screw

Abstract

The utility model discloses an efficient nitriding screw rod which comprises a screw rod, a screw head and a screw rod body, the screw rod body is of a cylindrical structure, and spiral teeth are spirally arranged on the outer portion of the screw rod body around the circumference of the screw rod body. The screw is characterized by further comprising a screw tail assembled at the rear end of the screw body; according to the screw for extruding the stationery, the tail part of the screw is screwed at the rear end of the screw, so that the screw is convenient to assemble, maintain and replace, the screw is provided with a multi-layer structure, and has the advantages of high temperature resistance, high strength, corrosion resistance, prolonged service life, more stable linearity, high efficiency in installation and use of a nitrided screw, and improved quality.

Description

Technical Field

[0001] The utility model belongs to the field of screws, and particularly relates to a high-efficiency nitrided screw. Background Art

[0002] Existing stationery extrusion screws on the market, such as the JED screw, offer long service life, strong plasticizing capacity, and stable linear motion. However, these screws still suffer from a rigid structure. The connection at the end of the screw, in particular, is prone to wear and inconvenient to replace after prolonged use. Furthermore, the overall service life, structural robustness, and aesthetics of the screw still require improvement. Utility Model Content

[0003] The purpose of the present invention is to provide a high-efficiency nitrided screw to solve the problems raised in the above background technology.

[0004] The utility model provides the following technical solution: a high-efficiency nitriding screw, comprising a screw, comprising a screw head and a screw body, wherein the screw body is a cylindrical structure, and spiral teeth are spirally arranged around the circumference of the screw body; the utility model is characterized in that it also includes a screw tail assembled at the rear end of the screw body, the screw tail includes a connecting portion that is an integral structure with the rear end of the screw, the front end of the connecting portion is arranged with a thread and the front end of the interior is arranged with an internal thread, the rear end of the screw is arranged with an internal thread that is threadedly mounted with the internal thread, and the rear end of the connecting portion is provided with a connecting shaft;

[0005] The screw includes a multi-layer structure, which includes a base layer, a nitriding layer, a nickel-based alloy surface hardening layer, a tungsten carbide layer, an electroplating layer and an alloy layer from the inside to the outside. The nitriding layer covers the outside of the base layer, the nickel-based alloy surface hardening layer covers the outer surface of the nitriding layer, the tungsten carbide layer covers the outer surface of the nickel-based alloy surface hardening layer, the electroplating layer covers the outer surface of the nickel-based alloy surface hardening layer, and the alloy layer covers the outer surface of the electroplating layer.

[0006] Preferably, the screw head has a conical structure.

[0007] Preferably, the cross-sectional diameter of the connecting shaft is smaller than the cross-sectional diameter of the connecting portion and the length thereof is longer than the length of the connecting portion.

[0008] Preferably, the base layer is stainless steel, carbon steel, alloy steel, titanium alloy, or copper.

[0009] Preferably, the depth of the nitriding layer is 0.45 mm-0.8 mm.

[0010] The beneficial effects of the present utility model are as follows: The screw used for extruding stationery supplies has its tail screwed onto the rear end of the screw, which is convenient for assembly, maintenance, and replacement. The screw is provided with a multi-layer structure, having high temperature resistance, high strength, corrosion resistance, increased service life, and more stable linearity, enabling the nitrided screw to be installed and used with high efficiency and improved quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a schematic structural diagram of the screw body and the screw head;

[0013] Figure 3 is a schematic structural diagram of the screw tail;

[0014] Figure 4 is Figure 1 a schematic structural diagram of the multi-layer structure of;

[0015] In the figure: screw 1, screw head 11, screw body 12, helical teeth 13, screw tail 2, connecting part 21, thread 22, internal thread 23, external thread 24, connecting shaft 25, multi-layer structure 3, base layer 31, nitrided layer 32, nickel-based alloy surface hardening layer 33, tungsten carbide layer 34, electroplated layer 35, alloy layer 36. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figures 1-4 , the technical solution provided by the present utility model: An efficient nitrided screw, including screw 1, including screw head 11 and screw body 12, and the screw head 11 has a conical structure. The screw body 12 is a cylindrical structure, and helical teeth 13 are spirally wound around its circumference outside the screw body 12; it is a prior art structure.

[0018] In view of the fact that the screw for extruding stationery supplies of the Jade brand in the existing background technology still has a fixed structure, especially the connection at the tail end of the screw is prone to wear and inconvenient to replace after long-term use. This application adopts the assembly structure of the screw tail 2, which is convenient for screwing, maintenance, and replacement, increases the flexibility of use and installation, and is more suitable for use according to the different needs of injection molding machines for stationery supplies.

[0019] Regarding the service life, structural firmness, and aesthetics of the overall screw, there is still room for improvement. This application sets up a multi-layer structure, and the screw in this application has a more efficient effect.

[0020] Therefore, this application is used to improve the structure of the extrusion screw of stationery supplies in the prior art: It also includes a screw tail 2 assembled at the rear end of the screw body 12. The screw tail 2 includes a connecting portion 21 integrally formed with the rear end of the screw. A thread 22 is arranged at the front end of the connecting portion 21, and an internal thread 23 is arranged at the front end inside. An external thread 24 that is screwed to match the internal thread 23 is arranged at the rear end of the screw. A connecting shaft 25 is arranged at the rear end of the connecting portion 21; the cross-sectional diameter of the connecting shaft 25 is smaller than the cross-sectional diameter of the connecting portion 21, and the length is longer than the length of the connecting portion 21. The structure is reasonable.

[0021] This application also improves the screw, making the screw in this application have a more efficient quality: The screw 1 includes a multi-layer structure 3. The multi-layer structure 3 includes a base layer 31, a nitrided layer 32, a nickel-based alloy surface hardening layer 33, a tungsten carbide layer 34, a plating layer 35, and an alloy layer 36 from the inside to the outside. In the figure of this embodiment, the arrangement from bottom to top represents the structure from the inside to the outside. Among them, the base layer 31 is stainless steel, or carbon steel, or alloy steel, or titanium alloy, or copper. These five base layers can select corresponding materials according to different usage environments.

[0022] Among them, the carbon steel screw is cheap and easy to process and use.

[0023] The stainless steel screw has strong corrosion resistance and rust resistance and is suitable for processing and using in humid and corrosive environments.

[0024] The alloy steel screw has high strength and good corrosion resistance.

[0025] The copper screw has good electrical conductivity, good heat conduction performance, and good corrosion resistance.

[0026] The titanium alloy screw has excellent corrosion resistance and high-temperature strength.

[0027] The nitrided layer 32 covers the outside of the base layer, and the depth of the nitrided layer 32 is 0.45 mm - 0.8 mm. The nickel-based alloy surface hardening layer 33 covers the outer surface of the nitrided layer 32, the tungsten carbide layer 34 covers the outer surface of the nickel-based alloy surface hardening layer 33, the plating layer 35 covers the outer surface of the nickel-based alloy surface hardening layer 33, and the alloy layer 36 covers the outer surface of the plating layer 35.

[0028] The working principle of this application is that the screw tail is screwed onto the rear end of the screw body according to the usage requirements. Since the rear end of the screw body is prone to damage, screwing makes it convenient to replace different screw tails. Both the screw body and the screw tail in this application adopt a multi-layer structure, which increases the firmness and aesthetics of the structure, extends the service life, has a certain strength, and is corrosion-resistant.

[0029] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An efficient nitrided screw, including a screw, which includes a screw head and a screw body. The screw body is of a cylindrical structure, and helical teeth are spirally wound around its circumference outside the screw body; characterized in that: It further includes a screw tail assembled at the rear end of the screw body. The screw tail includes a connecting portion integrally formed with the rear end of the screw. The front end of the connecting portion is provided with an external thread and the inner front end is provided with an internal thread. The rear end of the screw is provided with an internal thread that is screwed with the internal thread in a matching manner. The rear end of the connecting portion is provided with a connecting shaft. The screw includes a multi-layer structure. The multi-layer structure includes a base layer, a nitrided layer, a nickel-based alloy surface hardening layer, a tungsten carbide layer, a plating layer, and an alloy layer from the inside to the outside. The nitrided layer covers the outside of the base layer. The nickel-based alloy surface hardening layer covers the outer surface of the nitrided layer. The tungsten carbide layer covers the outer surface of the nickel-based alloy surface hardening layer. The plating layer covers the outer surface of the nickel-based alloy surface hardening layer. The alloy layer covers the outer surface of the plating layer.

2. The high-efficiency nitrided screw according to claim 1, characterized in that: The screw head has a conical structure.

3. The high-efficiency nitrided screw according to claim 1, wherein: The cross-sectional diameter of the connecting shaft is smaller than the cross-sectional diameter of the connecting portion and the length is longer than the length of the connecting portion.

4. The high-efficiency nitrided screw according to claim 1, characterized in that: The base layer is stainless steel, or carbon steel, or alloy steel, or titanium alloy, or copper.

5. The high-efficiency nitrided screw according to claim 1, wherein: The depth of the nitrided layer is 0.45 mm - 0.8 mm.

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