A screw rod for improving structural strength

Abstract

This utility model discloses a screw with improved structural strength, comprising a rod body, which includes an electroplated section and a non-electroplated section. The electroplated section includes a head, a threaded section, and a connecting section connected sequentially from left to right. The surfaces of the head and the threaded section are electroplated with a chromium layer. The threaded section includes a first non-gradient section, a gradient section, and a second non-gradient section connected sequentially from left to right. The bottom diameter of the gradient section gradually decreases from left to right, while the bottom diameters of the first and second non-gradient sections remain unchanged. The non-electroplated section includes a gear section and a connecting section connected sequentially from left to right. The outer peripheral sidewall of the gear section has multiple teeth arranged at uniform intervals along the circumferential direction. The teeth extend axially and their left ends extend to the right end of the connecting section. The outer peripheral sidewall of the connecting section has multiple protrusions arranged at uniform intervals along the circumferential direction. The protrusions extend axially and their right ends extend to the right end of the connecting section. This improves the overall structural strength and extends the service life.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a screw that improves structural strength. Background Technology

[0002] A screw is a cylinder with helical grooves cut on its outer surface or a cone with conical helical grooves cut on its outer surface. Screws are widely used in plastic molding equipment, such as plastic profile extruders and injection molding machines. The screw and barrel are the core components of plastic molding equipment, responsible for the heating, extrusion, and plasticizing process; they are the core of plastic machinery. Currently, the screw is one of the core components of an injection molding machine, performing functions such as conveying, mixing, and injection molding. With increasing demands for product quality in injection molding, the requirements for the screw's mixing effect on raw materials are also increasing.

[0003] In existing technologies, screws used for mixing raw materials typically only have threads on the screw itself to propel and mix the material. For example, they usually include a screw body comprising a shank, a connecting portion, and a shaft connected sequentially from right to left. One or two different types of threads are typically provided on the shaft, thus propeling and mixing the material through these threads. While existing screws can ensure material mixing, the lack of surface treatment design on the shaft surface results in poor overall structural strength and a limited service life.

[0004] Therefore, a new technology needs to be developed to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a screw that improves structural strength, thereby increasing overall structural strength and extending service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A screw for improving structural strength includes a rod body, the rod body comprising an electroplated section and a non-electroplated section;

[0008] The electroplating section includes a head, a threaded section, and a connecting section connected from left to right, and the surfaces of the head and the threaded section are electroplated with a chromium plating layer.

[0009] The threaded section includes a first non-gradient section, a gradient section, and a second non-gradient section connected sequentially from left to right. The bottom diameter of the gradient section gradually decreases from left to right. The bottom diameters of the first non-gradient section and the second non-gradient section remain unchanged. The maximum bottom diameter of the gradient section is equal to the bottom diameter of the first non-gradient section. The minimum bottom diameter of the gradient section is equal to the bottom diameter of the second non-gradient section and the bottom diameter of the connecting section.

[0010] The non-electroplated section includes a gear section and a connecting section connected sequentially from left to right. The left end of the gear section is connected to the right end of the connecting section. The outer peripheral sidewall of the gear section has a plurality of teeth arranged at uniform intervals along the circumferential direction. The teeth extend axially and the left end extends to the right end of the connecting section. The outer peripheral sidewall of the connecting section has a plurality of protruding ridges arranged at uniform intervals along the circumferential direction. The protruding ridges extend axially and the right end extends to the right end of the connecting section.

[0011] As a preferred embodiment, the right end of the connecting section is recessed to the left and has a water hole. The left end of the water hole extends to the right side of the head, and the axis of the water hole coincides with the axis of the rod.

[0012] As a preferred embodiment, the right end of the connecting segment is recessed to the left and has a connecting hole. The connecting hole has a structure that gradually decreases in size from right to left. The right end of the water hole is connected to the left end of the connecting hole, and the axis of the water hole coincides with the axis of the connecting hole.

[0013] As a preferred embodiment, the inner peripheral sidewall of the connecting hole is provided with threads.

[0014] As a preferred embodiment, the gear has 28 teeth, which are arranged circumferentially and at uniform intervals on the outer peripheral sidewall of the gear segment.

[0015] As a preferred embodiment, eight protruding ridges are provided, and the eight protruding ridges are arranged at uniform intervals along the circumference on the outer peripheral sidewall of the connecting section.

[0016] As a preferred embodiment, the head has a structure that gradually decreases in size from right to left, and the surface of the head is curved.

[0017] As a preferred embodiment, the maximum bottom diameter of the gradient section is 66mm, and the minimum bottom diameter of the gradient section is 55mm.

[0018] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly improves the hardness of the screw by electroplating a chromium-plated layer on the surface of the head and threaded section, thereby improving the overall structural strength and extending the service life. Secondly, by including the first non-gradient section, the gradual section, and the second non-gradient section connected sequentially from left to right in the threaded section, a multi-segment mixing structure is realized, which can improve the mixing effect and mixing degree. Furthermore, by including the gear section and the connecting section in the non-electroplated section, and providing multiple teeth arranged at uniform intervals along the circumferential direction on the outer peripheral sidewall of the gear section, and providing multiple protruding ridges arranged at uniform intervals along the circumferential direction on the outer peripheral sidewall of the connecting section, it is beneficial to the connection and fit between the right end of the rod and the external structure.

[0019] To more clearly illustrate the structural features, technical means, and specific objectives and functions of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 A cross-sectional view at point NN;

[0022] Figure 3 yes Figure 1 A sectional view at CC;

[0023] Figure 4 yes Figure 1 A sectional view at DD.

[0024] Explanation of reference numerals in the attached diagram:

[0025] 10. Head 20. Connecting Section

[0026] 30. First non-gradual transition section; 40. Gradual transition section

[0027] 50. Second non-gradient section; 60. Gear section

[0028] 61. Tooth section; 70. Connecting section

[0029] 71. Raised ridge; 72. Connecting hole

[0030] 80. Water hole. Detailed Implementation

[0031] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0032] A screw with improved structural strength includes a rod body comprising an electroplated section and a non-electroplated section; the electroplated section comprises a head 10, a threaded section, and a connecting section 20 connected sequentially from left to right; the surfaces of the head 10 and the threaded section are electroplated with a chromium plating layer to improve the hardness of the screw; the head 10 has a gradually decreasing structure from right to left, and the surface of the head 10 is an arc surface.

[0033] like Figure 1As shown, the threaded section includes a first non-gradient section 30, a gradient section 40, and a second non-gradient section 50 connected sequentially from left to right. The bottom diameter of the gradient section 40 gradually decreases from left to right. The bottom diameters of the first non-gradient section 30 and the second non-gradient section 50 remain unchanged. The maximum bottom diameter of the gradient section 40 is equal to the bottom diameter of the first non-gradient section 30, and the minimum bottom diameter of the gradient section 40 is equal to the bottom diameter of the second non-gradient section 50 and the bottom diameter of the connecting section 20. This achieves a multi-segment mixing structure, which can improve the mixing effect and mixing degree. In this embodiment, the maximum bottom diameter of the gradient section 40 is 66mm, and the minimum bottom diameter of the gradient section 40 is 55mm.

[0034] like Figure 1 , Figure 3 , Figure 4 As shown, the non-electroplated section includes a gear section 60 and a connecting section 70 connected sequentially from left to right. The left end of the gear section 60 is connected to the right end of the connecting section 20. The outer peripheral sidewall of the gear section 60 has a plurality of teeth 61 arranged at uniform intervals along the circumferential direction. The teeth 61 extend axially and their left ends extend to the right end of the connecting section 20. The outer peripheral sidewall of the connecting section 70 has a plurality of protruding ridges 71 arranged at uniform intervals along the circumferential direction. The protruding ridges 71 extend axially and their right ends extend to the right end of the connecting section 70.

[0035] In this embodiment, as Figure 4 As shown, 28 teeth 61 are provided, and the 28 teeth 61 are arranged at uniform intervals along the circumference on the outer peripheral sidewall of the gear segment 60; as Figure 3 As shown, there are 8 protruding ridges 71, which are arranged at uniform intervals along the circumference on the outer peripheral sidewall of the connecting section 70.

[0036] like Figure 1 , Figure 2 As shown, the right end of the connecting segment 70 is concave to the left and has a water hole 80. The left end of the water hole 80 extends to the right side of the head 10, and the axis of the water hole 80 coincides with the axis of the rod. Specifically, in this embodiment, the right end of the connecting segment 70 is concave to the left and has a connecting hole 72. The connecting hole 72 has a structure that gradually decreases in size from right to left. The right end of the water hole 80 is connected to the left end of the connecting hole 72. The axis of the water hole 80 coincides with the axis of the connecting hole 72, and the inner peripheral sidewall of the connecting hole 72 is provided with threads.

[0037] In summary, the key design features of this utility model are: firstly, by electroplating a chromium layer onto the surface of the head and threaded section, the hardness of the screw is improved, thereby enhancing the overall structural strength and extending its service life; secondly, by including a first non-gradient section, a gradient section, and a second non-gradient section connected sequentially from left to right in the threaded section, a multi-segment mixing structure is achieved, which improves the mixing effect and degree of mixing; and thirdly, by including a gear section and a connecting section in the non-electroplated section, and by providing multiple teeth arranged at uniform intervals along the circumferential direction on the outer peripheral sidewall of the gear section, and providing multiple protruding ridges arranged at uniform intervals along the circumferential direction on the outer peripheral sidewall of the connecting section, the connection and fit between the right end of the rod and the external structure are facilitated.

[0038] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A screw for improving structural strength, characterized in that: Includes a rod body, the rod body comprising electroplated sections and non-electroplated sections; The electroplating section includes a head, a threaded section, and a connecting section connected from left to right, and the surfaces of the head and the threaded section are electroplated with a chromium plating layer. The threaded section includes a first non-gradient section, a gradient section, and a second non-gradient section connected sequentially from left to right. The bottom diameter of the gradient section gradually decreases from left to right. The bottom diameters of the first non-gradient section and the second non-gradient section remain unchanged. The maximum bottom diameter of the gradient section is equal to the bottom diameter of the first non-gradient section. The minimum bottom diameter of the gradient section is equal to the bottom diameter of the second non-gradient section and the bottom diameter of the connecting section. The non-electroplated section includes a gear section and a connecting section connected sequentially from left to right. The left end of the gear section is connected to the right end of the connecting section. The outer peripheral sidewall of the gear section has a plurality of teeth arranged at uniform intervals along the circumferential direction. The teeth extend axially and the left end extends to the right end of the connecting section. The outer peripheral sidewall of the connecting section has a plurality of protruding ridges arranged at uniform intervals along the circumferential direction. The protruding ridges extend axially and the right end extends to the right end of the connecting section.

2. The screw for improving structural strength according to claim 1, characterized in that: The right end of the connecting section is recessed to the left and has a water hole. The left end of the water hole extends to the right side of the head, and the axis of the water hole coincides with the axis of the rod.

3. A screw for improving structural strength according to claim 2, characterized in that: The right end of the connecting section is recessed to the left and has a connecting hole. The connecting hole has a structure that gradually decreases in size from right to left. The right end of the water hole is connected to the left end of the connecting hole, and the axis of the water hole coincides with the axis of the connecting hole.

4. A screw for improving structural strength according to claim 3, characterized in that: The inner circumferential sidewall of the connecting hole is provided with threads.

5. A screw for improving structural strength according to claim 1, characterized in that: The gear segment has 28 teeth, which are arranged circumferentially and at uniform intervals on the outer peripheral sidewall of the gear segment.

6. A screw for improving structural strength according to claim 1, characterized in that: The convex ridges are provided in eight parts, and the eight convex ridges are arranged at uniform intervals along the circumference on the outer peripheral sidewall of the connecting section.

7. A screw for improving structural strength according to claim 1, characterized in that: The head has a structure that gradually decreases in size from right to left, and the surface of the head is curved.

8. A screw for improving structural strength according to claim 1, characterized in that: The maximum bottom diameter of the gradient section is 66mm, and the minimum bottom diameter of the gradient section is 55mm.

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