Multi-section type screw rod structure

By designing a multi-stage screw structure, combined with innovative design of the spiral segment, thread segment and mixing section, the problem of poor mixing effect of existing screws is solved, achieving more efficient mixing effect and longer service life.

CN223131306UActive Publication Date: 2025-07-22DONGGUAN TAIXING HARDWARE PROD CO LTD
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Patent Information

Application Number
CN202422157915.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-03
Publication Date
2025-07-22
Estimated Expiration
2034-09-03

AI Technical Summary

Technical Problem

The kneading degree and kneading effect of existing screws are poor, and it is impossible to knead through different structures to achieve different kneading effects.

Method used

A multi-stage screw structure is designed, including a spiral segment, a first thread segment, a second thread segment, a first mixing section and a second mixing section. Combined with spiral grooves, alternately arranged screw edges, strip mixing grooves and diamond bumps, the surface is coated with tungsten carbide layer and nickel-aluminum alloy layer to realize a multi-stage thread mixing structure.

Benefits of technology

It improves the kneading effect and kneading degree, extends the service life of the screw, and improves wear and corrosion resistance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a multi-section type screw rod structure which comprises a screw rod body, and the screw rod body comprises a handle part, a connecting part and a rod body which are sequentially connected from right to left. The rod body comprises a spiral section, a first threaded section, a second threaded section, a first mixing section and a second mixing section which are sequentially arranged from right to left, the peripheral side wall of the first threaded section is provided with a first screw flight, the peripheral side wall of the second threaded section is provided with a second screw flight and a third screw flight which are alternately arranged, and the right end of the second screw flight is connected to the left end of the first screw flight; the right end of the third screw flight is connected to the right end of the second screw flight, the left end of the third screw flight is connected to the left end of the second screw flight, a plurality of groups of strip-shaped mixing grooves are concavely formed in the peripheral side wall of the first mixing section, and a plurality of rhombic convex blocks are convexly arranged on the peripheral side wall of the second mixing section; the surfaces of the spiral section, the first threaded section and the second threaded section are each sequentially provided with a tungsten carbide layer and a nickel-aluminum alloy coating from outside to inside. The screw rod solves the problem that an existing screw rod is poor in mixing degree and mixing effect.
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Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a multi-stage screw structure. Background Technique

[0002] At present, the screw is one of the core components of an injection molding machine, and it has functions such as conveying, mixing, and injection molding; with the improvement of the quality requirements for injection-molded products, at the same time, the requirements for the mixing effect of the screw on raw materials are also increasing; in the prior art, the screw used for mixing raw materials usually only has thread teeth on the screw to push and mix the materials through each thread tooth. For example, it usually includes a screw body, and the screw body includes a handle part, a connecting part, and a rod body that are sequentially connected from right to left. Usually, one or two different thread teeth are arranged on the rod body. In this way, the materials are pushed and mixed through each thread. Although different threads are set for pushing and mixing, its limitation lies in that the differences between different threads are in the pitch, tooth width, lead, etc., and there is no change in the basic structure. The materials are only mixed and processed by the thread structure, and usually only have one-stage or two-stage pushing and mixing, resulting in the problem that it cannot be mixed through different structures to achieve different mixing effects, thus causing poor mixing degree and mixing effect.

[0003] Therefore, it is necessary to research a new technology to solve the above problems. Content of the Utility Model

[0004] In view of this, aiming at the deficiencies existing in the prior art, the main purpose of the utility model is to provide a multi-stage screw structure, which solves the problems of poor mixing degree and mixing effect of the existing screw.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multi-stage screw structure includes a screw body, and the screw body includes a handle portion, a connecting portion, and a rod body that are connected in sequence from right to left; the rod body includes a spiral section, a first thread section, a second thread section, a first mixing section, and a second mixing section that are arranged in sequence from right to left. A spiral groove is recessed on the outer peripheral side wall of the spiral section. The right end of the spiral section is connected to the left end of the connecting portion. The outer peripheral side wall of the first thread section has a first thread edge. The outer peripheral side wall of the second thread section has alternately arranged second thread edges and third thread edges. The second thread edge is the main tooth, and the third thread edge is the secondary tooth. The right end of the second thread edge is connected to the left end of the first thread edge. The right end of the third thread edge is connected to the right end of the second thread edge, and the left end of the third thread edge is connected to the left end of the second thread edge. Multiple strip-shaped mixing grooves are recessed on the outer peripheral side wall of the first mixing section. Multiple diamond-shaped protrusions are convex on the outer peripheral side wall of the second mixing section. Carbide layers and nickel-aluminum alloy coatings are sequentially provided on the surfaces of the spiral section, the first thread section, and the second thread section from outside to inside.

[0007] As a preferred solution, a plurality of positioning protrusions are provided on the outer peripheral side wall of the handle portion, and the plurality of positioning protrusions are evenly arranged at equal intervals along the circumferential direction of the handle portion, and each positioning protrusion extends in the left-right direction.

[0008] As a preferred solution, a relief groove is formed between two adjacent positioning protrusions. The left end of the relief groove extends to the left end face of the handle portion, and the right end of the relief groove extends to the right end face of the handle portion.

[0009] As a preferred solution, a cylindrical boss protruding to the right is integrally connected to the right end of the handle portion, and the outer diameter of the cylindrical boss is smaller than the outer diameter of the handle portion.

[0010] As a preferred solution, the connecting portion includes a first stepped portion, a chamfered portion, and a second stepped portion that are arranged in sequence from right to left. The right end of the first stepped portion is connected to the left end of the handle portion. The outer diameter of the handle portion is larger than the outer diameter of the first stepped portion. The outer diameter of the second stepped portion is larger than the outer diameter of the handle portion. The right end of the spiral section is connected to the left end of the second stepped portion. The outer diameter of the spiral section is larger than the outer diameter of the second stepped portion. The chamfered portion has a structure that gradually increases from right to left.

[0011] As a preferred solution, a plurality of diamond-shaped protrusions are evenly distributed in a matrix on the outer peripheral side wall of the second mixing section.

[0012] As a preferred solution, each group of strip-shaped mixing grooves includes a feeding strip-shaped groove and a discharging strip-shaped groove, and the feeding strip-shaped groove and the discharging strip-shaped groove are arranged at an intersecting interval on the outer peripheral side wall of the first mixing section.

[0013] As a preferred solution, a cone is integrally connected to the left end of the second mixing section, and the cone has a structure that gradually decreases from right to left.

[0014] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly realizes the multi-stage thread mixing structure design through the combined design of the spiral section, the first thread section, the second thread section, the first mixing section and the second mixing section, so that the material is pushed and mixed through the multi-stage thread mixing structure, and the mixing effect and mixing degree are improved. Secondly, by sequentially providing a tungsten carbide layer and a nickel-aluminum alloy coating on the surface of the spiral section, the first thread section and the second thread section from the outside to the inside, the wear resistance of the screw can be improved by the tungsten carbide layer, so that the screw is not easy to wear and the service life is extended. The corrosion resistance of the screw can be improved by setting the nickel-aluminum alloy coating.

[0015] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an embodiment of the utility model;

[0017] Figure 2 It is a partial structural schematic diagram of an embodiment of the utility model;

[0018] Figure 3 It is a cross-sectional view of the handle of an embodiment of the utility model.

[0019] Description of the accompanying drawings:

[0020] 10. Handle 11. Positioning convex part

[0021] 12. Make way groove 13. Cylindrical boss

[0022] 20. Connecting portion 21. First step portion

[0023] 22. Chamfered portion 23. Second step portion

[0024] 30. Helical segment 31. Helical groove

[0025] 40. First thread segment 41. First screw flight

[0026] 50, second thread segment 51, second screw flight

[0027] 52, third screw 60, first mixing section

[0028] 61. Strip mixing trough 611. Feeding strip trough

[0029] 612, discharging strip trough 70, second mixing section

[0030] 71. Rhombic bumps, 80. Cone Detailed implementation mode

[0031] Please refer to Figures 1 to 3 as shown, which shows the specific structure of the embodiment of the present utility model

[0032] A multi-stage screw structure includes a screw body, and the screw body includes a handle portion 10, a connecting portion 20 and a rod body connected in sequence from right to left; the rod body includes a spiral section 30, a first thread section 40, a second thread section 50, a first mixing section 60, and a second mixing section 70 arranged in sequence from right to left. A spiral groove 31 is recessed on the outer peripheral side wall of the spiral section 30. Through the design of the spiral section 30 combined with the spiral groove 31, it is beneficial to improve the mixing effect of the material; the right end of the spiral section 30 is connected to the left end of the connecting portion 20. The outer peripheral side wall of the first thread section 40 has a first thread edge 41, and the outer peripheral side wall of the second thread section 50 has alternately arranged second thread edges 51 and third thread edges 52. The second thread edge 51 is the main tooth, and the third thread edge 52 is the secondary tooth. The right end of the second thread edge 51 is connected to the left end of the first thread edge 41, the right end of the third thread edge 52 is connected to the right end of the second thread edge 51, and the left end of the third thread edge 52 is connected to the left end of the second thread edge 51. In this way, through the combined design of the spiral section 30, the first thread section 40, the second thread section 50, the first mixing section 60, and the second mixing section 70, a multi-stage thread mixing structure design is realized, so that the material is advanced and mixed through the multi-stage thread mixing structure, improving the mixing effect and the degree of mixing

[0033] The surfaces of the spiral section 30, the first thread section 40, the second thread section 50, the first mixing section 60, and the second mixing section 70 are all provided with a tungsten carbide layer and a nickel-aluminum alloy coating from outside to inside in sequence. In this way, the wear resistance of the screw can be improved through the tungsten carbide layer, making the screw not easily worn and extending its service life. Through the setting of the nickel-aluminum alloy coating, the corrosion resistance of the screw can be improved

[0034] A cylindrical boss 13 protruding rightward is integrally connected to the right end of the handle portion 10, and the outer diameter of the cylindrical boss 13 is smaller than the outer diameter of the handle portion 10. A plurality of positioning convex portions 11 are provided on the outer peripheral side wall of the handle portion 10, and the plurality of positioning convex portions 11 are arranged at equal intervals in sequence along the circumferential direction of the handle portion 10, and each positioning convex portion 11 extends in the left-right direction. A relief groove 12 is formed between two adjacent positioning convex portions 11, the left end of the relief groove 12 extends to the left end face of the handle portion 10, and the right end of the relief groove 12 extends to the right end face of the handle portion 10. Here, through the arrangement of the positioning convex portions 11, when the handle portion 10 is connected and positioned with an external structure, connection and positioning can be carried out through the positioning convex portions 11 arranged at equal intervals along the circumferential direction, so as to facilitate the connection and positioning of the handle portion 10, and prevent the phenomenon of circumferential relative rotation between the handle portion 10 and the external structure, ensuring the stability of the connection.

[0035] The connecting portion 20 includes a first stepped portion 21, a chamfered portion 22, and a second stepped portion 23 arranged in sequence from right to left. The right end of the first stepped portion 21 is connected to the left end of the handle portion 10, the outer diameter of the handle portion 10 is larger than the outer diameter of the first stepped portion 21, the outer diameter of the second stepped portion 23 is larger than the outer diameter of the handle portion 10, the right end of the spiral section 30 is connected to the left end of the second stepped portion 23, the outer diameter of the spiral section 30 is larger than the outer diameter of the second stepped portion 23, and the chamfered portion 22 has a structure that gradually increases from right to left. Thus, through the arrangement of the connecting portion 20, it can play a role in transitional connection.

[0036] A plurality of groups of strip-shaped mixing grooves 61 are recessed on the outer peripheral side wall of the first mixing section 60. Each group of strip-shaped mixing grooves 61 includes a feeding strip-shaped groove 611 and a discharging strip-shaped groove 612, and the feeding strip-shaped groove 611 and the discharging strip-shaped groove 612 are arranged at an intersecting interval on the outer peripheral side wall of the first mixing section 60; a plurality of diamond-shaped convex blocks 71 are protruded on the outer peripheral side wall of the second mixing section 70, and the plurality of diamond-shaped convex blocks 71 are uniformly distributed in a matrix on the outer peripheral side wall of the second mixing section 70 to achieve uniform mixing; here, the arrangement of the second mixing section 70 reduces the material-containing space formed during the installation of the mixing section, and cooperates with the diamond-shaped convex blocks 71 to achieve the mixing of materials, and the mixing effect is better; and, in this embodiment, a cone 80 is integrally connected to the left end of the second mixing section 70, and the cone 80 has a structure that gradually decreases from right to left to facilitate insertion into the material.

[0037] In summary, the key design point of the present utility model lies in that through the combined design of the spiral section, the first threaded section, the second threaded section, the first mixing section, and the second mixing section, a multi-section threaded mixing structure design is realized, enabling the material to be advanced and mixed through the multi-section threaded mixing structure, improving the mixing effect and degree. Secondly, by sequentially providing a tungsten carbide layer and a nickel-aluminum alloy coating from the outside to the inside on the surfaces of the spiral section, the first threaded section, and the second threaded section, in this way, the wear resistance of the screw can be improved through the tungsten carbide layer, making the screw not easily worn and extending its service life. Through the setting of the nickel-aluminum alloy coating, the corrosion resistance of the screw can be improved.

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

Claims

1. A multi - section screw structure, comprising a screw main body, and the screw main body includes a handle portion, a connecting portion and a rod body which are sequentially connected from right to left; characterized in that: The rod body includes a spiral section, a first threaded section, a second threaded section, a first kneading section, and a second kneading section arranged in sequence from right to left. A spiral groove is recessed in the outer peripheral side wall of the spiral section. The right end of the spiral section is connected to the left end of the connecting portion. The outer peripheral side wall of the first threaded section has a first thread ridge. The outer peripheral side wall of the second threaded section has alternately arranged second thread ridges and third thread ridges. The second thread ridges are main teeth, and the third thread ridges are secondary teeth. The right end of the second thread ridge is connected to the left end of the first thread ridge. The right end of the third thread ridge is connected to the right end of the second thread ridge, and the left end of the third thread ridge is connected to the left end of the second thread ridge. Multiple strip-shaped kneading grooves are recessed in the outer peripheral side wall of the first kneading section. Multiple diamond-shaped protrusions protrude from the outer peripheral side wall of the second kneading section. The surfaces of the spiral section, the first threaded section, and the second threaded section are sequentially provided with a tungsten carbide layer and a nickel-aluminum alloy coating from the outside to the inside.

2. The multi-stage screw structure according to claim 1, characterized in that: A number of positioning protrusions are provided on the outer peripheral side wall of the handle portion. The number of positioning protrusions are arranged at equal intervals in sequence along the circumferential direction of the handle portion, and each positioning protrusion extends in the left-right direction.

3. The multi-stage screw structure according to claim 2, wherein: A relief groove is formed between two adjacent positioning protrusions. The left end of the relief groove extends to the left end face of the handle portion, and the right end of the relief groove extends to the right end face of the handle portion.

4. A multi-stage screw structure according to claim 1, characterized in that: The right end of the handle portion is integrally connected with a cylindric convex platform protruding rightward. The outer diameter of the cylindric convex platform is smaller than the outer diameter of the handle portion.

5. A multi-stage screw structure according to claim 1, characterized in that: The connecting portion includes a first stepped portion, a chamfered portion, and a second stepped portion arranged in sequence from right to left. The right end of the first stepped portion is connected to the left end of the handle portion. The outer diameter of the handle portion is larger than the outer diameter of the first stepped portion. The outer diameter of the second stepped portion is larger than the outer diameter of the handle portion. The right end of the spiral section is connected to the left end of the second stepped portion. The outer diameter of the spiral section is larger than the outer diameter of the second stepped portion. The chamfered portion has a structure that gradually increases from right to left.

6. The multi-stage screw structure according to claim 1, characterized in that: Multiple diamond-shaped protrusions are evenly distributed in a matrix on the outer peripheral side wall of the second kneading section.

7. A multi-stage screw structure according to claim 1, characterized in that: Each group of strip-shaped kneading grooves includes a feeding strip-shaped groove and a discharging strip-shaped groove. The feeding strip-shaped groove and the discharging strip-shaped groove are arranged at an intersecting interval on the outer peripheral side wall of the first kneading section.

8. A multi-stage screw structure according to claim 1, wherein: The left end of the second kneading section is integrally connected with a cone. The cone has a structure that gradually decreases from right to left.