A screw structure

Abstract

The utility model discloses a screw rod structure, including plating section and non -plating section, non -plating section includes the assembly section, the link section from right to left connection in proper order, and plating section includes the connecting section, first non -gradual section, gradual section, second non -gradual section, head from right to left connection in proper order, the surface of connecting section, first non -gradual section, gradual section, second non -gradual section, head is plated with chrome layer, the bottom diameter of first non -gradual section and second non -gradual section is invariable, and the minimum bottom diameter of gradual section is equal with the bottom diameter of first non -gradual section, and the maximum bottom diameter of gradual section is equal with the bottom diameter of second non -gradual section, the outer peripheral side wall of first non -gradual section, gradual section is provided with first screw thread that extends from right to left spiral, and second non -gradual section is double -end tooth section, and the outer peripheral side wall of double -end tooth section is equipped with second screw thread, third screw thread that extends from right to left spiral, and second screw thread, third screw thread extend spiral alternately in proper order with interval, and it has improved overall structural strength, has prolonged the life.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a screw structure. 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 purpose is to provide a screw structure that improves the overall structural strength and extends the service life.

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

[0007] A screw structure includes an electroplated section and a non-electroplated section. The non-electroplated section includes an assembly section and a connecting section connected sequentially from right to left, with the left end of the connecting section connected to the right end of the electroplated section. The electroplated section includes a connecting section, a first non-gradient section, a gradient section, a second non-gradient section, and a head connected sequentially from right to left. The surfaces of the connecting section, the first non-gradient section, the gradient section, the second non-gradient section, and the head are electroplated with a chromium plating layer. The left end of the connecting section is connected to the right end of the connecting section. The bottom diameter of the gradient section gradually increases from right to left. The bottom diameters of the first non-gradient segment and the second non-gradient segment remain unchanged. The minimum bottom diameter of the gradient segment is equal to the bottom diameter of the first non-gradient segment, and the maximum bottom diameter of the gradient segment is equal to the bottom diameter of the second non-gradient segment. The outer peripheral sidewalls of the first non-gradient segment and the gradient segment are provided with a first thread extending spirally from right to left. The second non-gradient segment is a double-ended thread segment. The outer peripheral sidewalls of the double-ended thread segment are provided with a second thread and a third thread extending spirally from right to left. The second thread and the third thread extend spirally alternately at intervals.

[0008] As a preferred embodiment, the head has rounded corners.

[0009] As a preferred embodiment, a keyway is recessed on the outer peripheral sidewall of the assembly section, and the keyway extends axially.

[0010] As a preferred embodiment, the right end of the assembly section is chamfered.

[0011] As a preferred embodiment, the connecting segment is in the shape of a frustum that gradually increases in size from right to left. The maximum outer diameter of the connecting segment is equal to the outer diameter of the connecting section, and the minimum outer diameter of the connecting segment is equal to the outer diameter of the assembly section.

[0012] As a preferred embodiment, the outer peripheral sidewall of the connecting section is provided with external threads.

[0013] As a preferred embodiment, the width of the first thread, the second thread, and the third thread is all 9mm.

[0014] As a preferred embodiment, the pitch L1 of the first thread is 100 mm.

[0015] As a preferred embodiment, the pitch L2 between the second thread and the third thread is 50 mm.

[0016] Compared with the prior art, this utility model has significant 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 layer on the surface of the connecting section, the first non-gradient section, the gradient section, the second non-gradient section, and the head, thereby improving the overall structural strength and extending the service life. Furthermore, through the combined design of the first non-gradient section, the gradient section, and the second non-gradient section, and by setting the first thread on the outer peripheral sidewall of the first non-gradient section and the gradient section, and designing the second non-gradient section as a double-headed threaded section, the outer peripheral sidewall of the double-headed threaded section is provided with a second thread and a third thread extending spirally from right to left, and the second thread and the third thread extend spirally at alternating intervals, thereby making the mixing structure more complex and enabling more thorough mixing of materials. This achieves a multi-segment threaded structure design, allowing materials to be propelled and mixed through the multi-segment threaded structure, thus improving the mixing effect and degree of mixing.

[0017] 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

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0019] Figure 2 This is a diagram illustrating the second non-gradient segment of an embodiment of this utility model;

[0020] Figure 3 This is a partial cross-sectional schematic diagram of the first non-gradient segment according to an embodiment of the present utility model;

[0021] Figure 4 This is a partial cross-sectional schematic diagram of the second non-gradient segment according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached diagram:

[0023] 10. Electroplating section 11. Connecting section

[0024] 12. First non-gradual transition section 13. Gradual transition section

[0025] 14. Second non-gradual transition segment 15. Head

[0026] 16. First thread 17. Second thread

[0027] 18. Third thread 19. Rounded corner

[0028] 101. External thread 20. Non-electroplated section

[0029] 21. Assembly section; 22. Connection section

[0030] 23. Keyway 24. Chamfer. Detailed Implementation

[0031] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", and "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0033] A screw structure includes an electroplated section 10 and a non-electroplated section 20. The non-electroplated section 20 includes an assembly section 21 and a connecting section 22 connected sequentially from right to left, with the left end of the connecting section 22 connected to the right end of the electroplated section 10. The electroplated section 10 includes a connecting section 11, a first non-gradient section 12, a gradient section 13, a second non-gradient section 14, and a head 15 connected sequentially from right to left. The surfaces of the connecting section 11, the first non-gradient section 12, the gradient section 13, the second non-gradient section 14, and the head 15 are electroplated with a chromium plating layer to improve the hardness of the screw. The left end of the connecting section 22 is connected to the right end of the connecting section 11.

[0034] The outer peripheral sidewalls of the first non-gradient section 12 and the gradient section 13 are provided with a first thread 16 extending spirally from right to left. The second non-gradient section 14 is a double-headed thread section. The outer peripheral sidewalls of the double-headed thread section are provided with a second thread 17 and a third thread 18 extending spirally from right to left. The second thread 17 and the third thread 18 extend spirally at alternating intervals. In this way, the mixing structure can be made more complex, and the material can be mixed more thoroughly. This realizes the multi-segment thread structure design, so that the material is propelled and mixed through the multi-segment thread structure, thereby improving the mixing effect and mixing degree.

[0035] In this embodiment, the head 15 is formed with a rounded corner 19, and the right end of the assembly section 21 is formed with a chamfer 24. Thus, through the combined design of the rounded corner 19 and the chamfer 24, a scratch-resistant structure can be formed at both ends of the screw, providing a certain degree of protection.

[0036] In this embodiment, a keyway 23 is recessed on the outer peripheral sidewall of the assembly section 21, and the keyway 23 extends axially to facilitate connection and installation with an external structure. Additionally, an external thread 101 is provided on the outer peripheral sidewall of the connecting section 11 to facilitate connection and installation with an external structure.

[0037] In this embodiment, the connecting segment 22 is a frustum shape that gradually increases from right to left. The maximum outer diameter of the connecting segment 22 is equal to the outer diameter of the connecting segment 11, and the minimum outer diameter of the connecting segment 22 is equal to the outer diameter of the assembly segment 21. The bottom diameter of the gradient segment 13 gradually increases from right to left. The bottom diameters of the first non-gradient segment 12 and the second non-gradient segment 14 remain unchanged. The minimum bottom diameter of the gradient segment 13 is equal to the bottom diameter of the first non-gradient segment 12, and the maximum bottom diameter of the gradient segment 13 is equal to the bottom diameter of the second non-gradient segment 14.

[0038] In this embodiment, the width of the first thread 16, the second thread 17, and the third thread 18 is 9mm; the pitch L1 of the first thread 16 is 100mm, and the pitch L2 between the second thread 17 and the third thread 18 is 50mm. In this way, the pitch of the first thread 16 is twice the pitch between the second thread 17 and the third thread 18, so as to form different segments of the thread with obvious differences, thereby making the thread structure more complex and improving the mixing effect.

[0039] In summary, the key design feature of this utility model lies in the fact that electroplating a chromium layer on the surfaces of the connecting section, the first non-gradient section, the gradient section, the second non-gradient section, and the head increases the hardness of the screw, thereby improving the overall structural strength and extending its service life. Furthermore, the combined design of the first non-gradient section, the gradient section, and the second non-gradient section, with first threads on the outer periphery of the first non-gradient section and the gradient section, and the second non-gradient section designed as a double-ended threaded section, with second and third threads spirally extending from right to left on the outer periphery of the double-ended threaded section, and the second and third threads spirally extending alternately at intervals, makes the mixing structure more complex, enabling more thorough mixing of the material. This multi-segment threaded structure design allows the material to be propelled and mixed through the multi-segment threaded structure, improving the mixing effect and degree.

[0040] 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 structure, characterized in that: It includes an electroplated section and a non-electroplated section; the non-electroplated section includes an assembly section and a connecting section connected sequentially from right to left, with the left end of the connecting section connected to the right end of the electroplated section; the electroplated section includes a connecting section, a first non-gradient section, a gradient section, a second non-gradient section, and a head connected sequentially from right to left, with the surfaces of the connecting section, the first non-gradient section, the gradient section, the second non-gradient section, and the head electroplated with a chromium layer; the left end of the connecting section is connected to the right end of the connecting section; the bottom diameter of the gradient section gradually increases from right to left. The bottom diameters of the first non-gradient segment and the second non-gradient segment remain unchanged. The minimum bottom diameter of the gradient segment is equal to the bottom diameter of the first non-gradient segment, and the maximum bottom diameter of the gradient segment is equal to the bottom diameter of the second non-gradient segment. The outer peripheral sidewalls of the first non-gradient segment and the gradient segment are provided with a first thread extending spirally from right to left. The second non-gradient segment is a double-ended thread segment. The outer peripheral sidewalls of the double-ended thread segment are provided with a second thread and a third thread extending spirally from right to left. The second thread and the third thread extend spirally alternately at intervals.

2. The screw structure according to claim 1, characterized in that: The head has rounded corners.

3. The screw structure according to claim 1, characterized in that: The outer peripheral sidewall of the assembly section is recessed with a keyway, which extends axially.

4. The screw structure according to claim 1, characterized in that: The right end of the assembly section has a chamfer.

5. A screw structure according to claim 1, characterized in that: The connecting section is in the shape of a frustum that gradually increases in size from right to left. The maximum outer diameter of the connecting section is equal to the outer diameter of the connecting section, and the minimum outer diameter of the connecting section is equal to the outer diameter of the assembly section.

6. A screw structure according to claim 1, characterized in that: The outer peripheral sidewall of the connecting section is provided with external threads.

7. A screw structure according to claim 1, characterized in that: The width of the first thread, the second thread, and the third thread is 9mm.

8. A screw structure according to claim 1, characterized in that: The pitch L1 of the first thread is 100mm.

9. A screw structure according to claim 1, characterized in that: The pitch L2 between the second and third threads is 50 mm.

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