Small mixing screw

Abstract

The utility model discloses a small mixing screw, which belongs to the technical field of planetary screw extruders, solves the problem that the plasticizing effect of materials is poorer due to the poorer scattering effect of helical teeth of an existing device on the materials, and comprises a screw main body, right-handed helical teeth are fixedly arranged on the outer surface of the screw main body, and the right-handed helical teeth are fixedly arranged on the outer surface of the screw main body. A discharging chamfer and a feeding chamfer are formed in the two ends of the screw body respectively, a left-hand spiral groove is formed in the middle of the right-hand spiral tooth and cuts the middle of the right-hand spiral tooth into independent spiral short teeth, and a rectangular groove is formed in the side, away from the screw body, of each spiral short tooth. By means of the arrangement of the spiral short teeth, the right-handed spiral teeth can be better meshed with the large screw, when the large screw is driven to rotate, materials can be better scattered through the arrangement of the rectangular grooves and the spiral short teeth, the purpose of improving the scattering effect of the materials is achieved, and the plasticizing effect of the materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of planetary screw extruders, in particular to a small mixing screw. Background Art

[0002] The large screw in the plasticizing device of the planetary extruder is meshed with a small screw, which rotates around the large screw and revolves around the large screw. The small screw is made of customized super wear-resistant and corrosion-resistant alloy and is processed by an imported CNC gear hobbing machine.

[0003] After searching, the application with patent number 202122331541.0 discloses a small screw for a planetary extruder plasticizing device, including a discharge pipe, a screw body and spiral teeth, the outer surface of the screw body is equipped with spiral teeth, a discharge pipe is installed on one side of the screw body, a feed hole is provided on the outer surface of the discharge pipe close to the screw body, a homogenizing plate is installed on the inner surface of the discharge pipe, a sliding ring is sleeved on the side of the outer surface of the discharge pipe close to the feed hole, a spiral spring is installed on the side of the sliding ring away from the feed hole, and the spiral spring is sleeved on the outer surface of the discharge pipe;

[0004] Although the small screw of the planetary extruder plasticizing device is provided with a feed chamfer and a discharge chamfer to facilitate the feeding at the feed end of the small screw and the discharging at the discharge end, and the plasticizing effect of the raw material can be stabilized by providing a sliding ring and a spiral spring, the spiral teeth of the small screw of the planetary extruder plasticizing device have a poor effect of breaking up the material, which leads to a poor plasticizing effect of the material.

[0005] Therefore, we proposed a small mixing screw. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a small mixing screw, which solves the problem that the spiral teeth of the prior device have a poor effect on breaking up materials, which in turn leads to a poor plasticizing effect of the materials.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a small mixing screw, including a screw body, the outer surface of the screw body is fixedly mounted with right-handed spiral teeth, the two ends of the screw body are respectively provided with a discharge chamfer and a feed chamfer, a left-handed spiral groove is provided in the middle of the right-handed spiral teeth, the left-handed spiral groove cuts the middle of the right-handed spiral teeth into separate short spiral teeth, and a rectangular groove is provided on the side of the short spiral teeth away from the screw body.

[0008] Preferably, circular grooves are provided in the middle of both ends of the screw body, and the outer ring of the bearing ring is fixedly installed on the inner wall of the circular groove, wherein the bearing ring is an existing structure, the bearing ring includes an inner ring and an outer ring, and balls are arranged in the middle of the inner ring and the outer ring, and the inner ring of the bearing ring can rotate inside the circular groove.

[0009] Preferably, a cover plate is fixedly mounted on the side wall of the inner ring of the bearing ring, wherein the cover plate can rotate synchronously with the inner ring of the bearing ring.

[0010] Preferably, the cover plate is rotatably mounted inside the circular groove and flush with the end surface of the screw body, thereby preventing the cover plate from protruding from both ends of the screw body and affecting the normal use of the screw body.

[0011] Preferably, a clearance groove is provided in the middle of the side of the cover plate away from the screw body, and the edge of the clearance groove is rounded, wherein the clearance groove facilitates contact with the side wall of the cover plate.

[0012] The utility model provides a small mixing screw, which has the following beneficial effects:

[0013] 1. The small mixing screw can make the right-handed spiral teeth mesh better with the large screw by setting the short spiral teeth. When the large screw is driven to rotate, the rectangular groove and the short spiral teeth can better break up the material, thereby achieving the purpose of improving the material breaking effect, which is beneficial to improving the material plasticizing effect, and solves the problem that the spiral teeth of the existing device have poor material breaking effect, which leads to poor material plasticizing effect.

[0014] 2. The small mixing screw is inserted into the clearance groove by the installer with his fingers, and then pushed between the barrel and the large screw. When pushed into the barrel, the large screw will rotate continuously due to the meshing setting of the right-handed spiral teeth. When rotating, through the setting of the bearing ring and the cover plate, the installer's fingers only need to push the clearance groove inward to push it into the barrel. The installer's fingers will not rub against the screw body, which is beneficial to protect the installer's hands and improve the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at point A;

[0017] Figure 3 This is a schematic diagram of the main structure of the screw rod of the utility model;

[0018] Figure 4It is a schematic diagram of the split structure of the utility model.

[0019] In the figure: 1, screw body; 11, circular groove; 2, right-handed spiral teeth; 21, left-handed spiral groove; 22, short spiral teeth; 23, rectangular groove; 3, bearing ring; 4, cover plate; 41, clearance groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] like Figure 1-4 As shown: it includes a screw body 1, a right-handed spiral tooth 2 is fixedly installed on the outer surface of the screw body 1, and a discharge chamfer and a feed chamfer are respectively provided at both ends of the screw body 1. A left-handed spiral groove 21 is provided in the middle of the right-handed spiral tooth 2, and the left-handed spiral groove 21 cuts the middle of the right-handed spiral tooth 2 into individual short spiral teeth 22. A rectangular groove 23 is provided on the side of the short spiral tooth 22 away from the screw body 1. Through the arrangement of the short spiral teeth 22, the right-handed spiral teeth 2 can be better meshed with the large screw. When the large screw drives 5 to rotate, the rectangular groove 23 and the short spiral teeth 22 can be arranged to better break up the material, thereby achieving the purpose of improving the material breaking effect, which is beneficial to improving the material plasticizing effect.

[0023] Embodiment 2:

[0024] like Figure 1 , 3 As shown in 4: a circular groove 11 is provided in the middle of both ends of the screw body 1, and the outer ring of the bearing ring 3 is fixedly installed on the inner wall of the circular groove 11, and a cover plate 4 is fixedly installed on the side wall of the inner ring of the bearing ring 3. The cover plate 4 is rotatably mounted in the circular groove 11 and is flush with the end face of the screw body 1. A clearance groove 41 is provided in the middle of the side of the cover plate 4 away from the screw body 1, and the edge of the clearance groove 41 is set as a rounded corner. The installer clamps his fingers in the clearance groove 41 and then pushes 5 between the barrel and the large screw. When 5 is pushed into the barrel, due to the meshing setting of the large screw and the right-handed spiral tooth 2, 5 will rotate continuously. When 5 rotates, through the setting of the bearing ring 3 and the cover plate 4, the installer's fingers only need to push the clearance groove 41 inward to push 5 into the barrel. The installer's fingers will not rub against the screw body 1, which is beneficial to protecting the installer's hands and improving the installation efficiency of 5.

[0025] Working principle and use process of the utility model: when using the small mixing screw, the installer clamps his finger inside the clearance groove 41, and then pushes 5 between the barrel and the large screw. When 5 is pushed into the barrel, due to the meshing setting of the large screw and the right-handed spiral teeth 2, 5 will rotate continuously. When 5 rotates, through the setting of the bearing ring 3 and the cover plate 4, the installer's finger only needs to push the clearance groove 41 inward to push 5 into the barrel. The installer's finger will not generate friction with the screw body 1, avoiding the situation where the hand and 5 are twisted synchronously. Through the setting of the spiral short teeth 22, the right-handed spiral teeth 2 can be better meshed with the large screw. When the large screw drives 5 to rotate, through the setting of the rectangular groove 23 and the spiral short teeth 22, the right-handed spiral teeth 2 can break up the material.

[0026] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A small mixing screw, comprising a screw body (1), the outer surface of which is fixedly provided with right-handed spiral teeth (2), and both ends of the screw body (1) are provided with a discharge chamfer and a feed chamfer respectively; Features: A left-handed spiral groove (21) is provided in the middle of the right-handed spiral tooth (2), and the left-handed spiral groove (21) cuts the middle of the right-handed spiral tooth (2) into individual short spiral teeth (22). A rectangular groove (23) is provided on the side of the short spiral tooth (22) away from the screw body (1).

2. A small mixing screw according to claim 1, characterized in that: A circular groove (11) is provided in the middle of both ends of the screw body (1), and the outer ring of the bearing ring (3) is fixedly mounted on the inner wall of the circular groove (11).

3. A small mixing screw according to claim 2, characterized in that: A cover plate (4) is fixedly mounted on the side wall of the inner ring of the bearing ring (3).

4. A small mixing screw according to claim 3, characterized in that: The cover plate (4) is rotatably mounted inside the circular groove (11) and is flush with the end surface of the screw body (1).

5. A small mixing screw according to claim 4, characterized in that: A clearance groove (41) is provided in the middle of one side of the cover plate (4) away from the screw body (1), and the edge of the clearance groove (41) is arranged to be rounded.

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