A low resistance rotary heating screw structure for modified plastics

Abstract

The utility model relates to a kind of low resistance rotary heating screw structure of modified plastic, including: outer tube, it is set at the inner cavity of modified plastic extruder, outer tube is conically arranged, and the top of outer tube is provided with feed pipe;Conical cylinder is rotationally arranged in the inside of outer tube, the outer peripheral wall of conical cylinder is wound with two spiral blades, one end of two spiral blades is provided with communicating pipe, communicating pipe and the inner cavity of conical cylinder are interconnected, and the inside of spiral blade is provided with flow channel.The utility model relates to the technical field of modified plastic extrusion screw.The low resistance rotary heating screw structure of the modified plastic, when material enters to the inside of outer tube through feed pipe, by larger pitch, and cooperate conical cylinder of conical arrangement, the rapid paving of material can be realized, make solid material quickly flatten, reduce the accumulation of solid material, avoid the friction between solid material to influence screw rotation, and then reduce the friction of screw.

Description

Technical Field

[0001] This utility model relates to the technical field of modified plastic extrusion screws, and in particular to a low-resistance rotary heating screw structure for modified plastics. Background Technology

[0002] As a core component in polymer modification, the design and technological development of modified plastic extrusion screws directly affect material properties and production efficiency.

[0003] In the existing technology, the pitch difference of the heating screw of the extruder is small. When pushing the plastic to move, the resistance of solid material and fluid material is different. The friction between solid materials is generally large. Therefore, the heating screw has greater resistance when rotating, resulting in reduced efficiency. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a low-resistance rotary heating screw structure for modified plastics, so as to solve the technical problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A modified plastic low-resistance rotary heating screw structure, comprising:

[0007] The outer cylinder is located inside the cavity of the modified plastic extruder. The outer cylinder is conical and has a feed pipe at its top.

[0008] The outer cylinder has a cone that rotates inside. Two helical blades are wound around the outer peripheral wall of the cone. One end of each helical blade is connected to a connecting pipe, which is connected to the inner cavity of the cone. The helical blades have a flow channel inside.

[0009] The heating element, located at one end of the outer cylinder, is used to heat the medium and circulate it within the spiral blades and the cone.

[0010] Furthermore, a connecting cylinder is provided at the other end of the two spiral blades, and a feeding pipe is provided inside the connecting cylinder, which is connected to the inner cavity of the cone.

[0011] Furthermore, the pitch of both helical blades gradually decreases from the end with the larger cross-sectional area of ​​the cone to the other end, and the height of the helical blades gradually increases.

[0012] Furthermore, the height of the two helical blades gradually increases from the end with the larger cross-sectional area of ​​the cone to the other end.

[0013] Furthermore, the heating assembly includes:

[0014] The circulating pump has a medium cylinder at its inlet end, which is connected to a connecting cylinder. The circulating pump has a heating pipe at its outlet end, and the other end of the heating pipe is connected to the feed pipe.

[0015] In summary, this utility model has at least one of the following beneficial technical effects:

[0016] 1. This modified plastic low-resistance rotary heating screw structure allows the material to be quickly spread out when it enters the inner cylinder through the feed pipe. The large screw pitch and the conical design of the cylinder enable the material to be quickly spread out, reducing the accumulation of solid material and preventing the friction between solid materials from affecting the screw rotation, thereby reducing the friction of the screw.

[0017] 2. This modified plastic low-resistance rotary heating screw structure, after the material melts, the height of the spiral blades gradually increases and the diameter of the cone gradually decreases, which can make the material gather quickly and reduce the contact area between the viscous plastic after melting and the inner wall of the outer cylinder, so as to achieve the effect of reducing resistance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a low-resistance rotary heating screw structure for modified plastic according to the present invention.

[0020] Figure 2 This is a schematic diagram of the spiral blade of a modified plastic low-resistance rotary heating screw structure according to the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the outer cylinder of a modified plastic low-resistance rotary heating screw structure according to this utility model.

[0022] Figure 4 This is a cross-sectional view of the spiral blades and cone of a modified plastic low-resistance rotary heating screw structure according to this utility model.

[0023] Figure 5 This is a schematic diagram of the planar structure of a low-resistance rotary heating screw structure for modified plastic according to this utility model.

[0024] In the diagram, 1 is the outer cylinder; 2 is the feed pipe; 3 is the cone cylinder; 4 is the spiral blade; 5 is the connecting pipe; 6 is the flow channel; 7 is the heating component; 71 is the circulating pump; 72 is the medium cylinder; 73 is the heating pipe; 8 is the connecting cylinder; and 9 is the feed pipe. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example:

[0027] Reference Figures 1-5 This utility model discloses a low-resistance rotary heating screw structure for modified plastics, comprising:

[0028] The outer cylinder 1 is located in the inner cavity of the modified plastic extruder. The outer cylinder 1 is conical and has a feed pipe 2 at its top.

[0029] The outer cylinder 1 has a cone 3 rotating inside. Two spiral blades 4 are wound around the outer peripheral wall of the cone 3. One end of the two spiral blades 4 is provided with a connecting pipe 5. The connecting pipe 5 is connected to the inner cavity of the cone 3. The spiral blades 4 have a flow channel 6 inside.

[0030] Heating component 7, which is located at one end of outer cylinder 1, is used to heat the medium and make it circulate inside spiral blades 4 and cone 3.

[0031] In this embodiment, as Figure 1 As shown, the plastic feed tube 2 that needs to be melted and extruded is put into the inner cylinder 1. The cone 3 rotates, driving the two spiral blades 4 to rotate and pushing the material inside to move. At this time, the solid material will fall into the pitch of the spiral blades 4. Since the cone 3 is cone-shaped, when the material falls into the inner cylinder 1, it will move along the cone 3 under the influence of gravity, which can make the solid material fluid, thereby reducing the friction between materials and achieving the purpose of reducing the resistance of the screw.

[0032] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 3 As shown, the other end of the two spiral blades 4 is provided with a connecting cylinder 8, and the inside of the connecting cylinder 8 is provided with a feeding pipe 9, which is connected to the inner cavity of the cone cylinder 3.

[0033] In this embodiment, the flow channel 6 inside the spiral blade 4 is connected to the inner cavity of the cone 3 by the arrangement of the connecting cylinder 8 and the feeding pipe 9 in conjunction with the heating component 7. During use, the heating component 7 heats the medium and then introduces the heated medium into the interior of the spiral blade 4. At this time, the heat can contact the solid material through the spiral blade 4 and the cylinder wall of the cone 3, thereby improving the melting efficiency of the solid material and enabling the solid material to melt quickly to form a fluid, thereby reducing friction and achieving the purpose of reducing resistance.

[0034] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 5 As shown, the pitch of the two spiral blades 4 gradually decreases from the end with the larger cross-sectional area of ​​the cone 3 to the other end, and the height of the spiral blades 4 gradually increases.

[0035] In this embodiment, since the pitch of the spiral blade 4 is larger at the end of the cone 3 with a larger cross-sectional area, and the feed rod is located at the end of the cone 3 with a larger cross-sectional area, when the material enters the interior of the outer cylinder 1 through the feed pipe 2, the material can be quickly spread out by the larger pitch and the cone 3 with a conical shape, so that the solid material can be quickly flattened and fully contacted with the cone 3 and the spiral blade 4, so as to achieve the purpose of quickly melting the solid material.

[0036] In a further preferred embodiment of this utility model, such as Figure 5 As shown, the height of the two spiral blades 4 gradually increases from the end with the larger cross-sectional area of ​​the cone 3 to the other end.

[0037] In this embodiment, after the material melts, the height of the spiral blade 4 gradually increases and the diameter of the cone 3 gradually decreases, thus enabling the material to quickly gather and reducing the contact area between the melted material and the inner wall of the outer cylinder 1, thereby reducing resistance.

[0038] In a further preferred embodiment of this utility model, such as Figure 5 As shown, the heating assembly 7 includes:

[0039] The circulating pump 71 has a medium cylinder 72 at its inlet end, and the medium cylinder 72 is connected to the connecting cylinder 8. The circulating pump 71 has a heating pipe 73 at its outlet end, and the other end of the heating pipe 73 is connected to the feed pipe 9.

[0040] In this embodiment, by setting up the circulating pump 71, the material is drawn out through the connecting cylinder 8 and the medium cylinder 72, heated by the heating pipe 73, and then pumped back into the feed pipe 9, so that a flow loop is formed between the feed pipe 9, the cone cylinder 3, the flow channel 6, the connecting cylinder 8 and the circulating pump 71, so as to achieve the purpose of circulating heating of the material, making it melt quickly and reducing friction.

[0041] The implementation principle of the above embodiment is as follows: the screw pitch of the spiral blade 4 is larger at the end of the cone 3 with a larger cross-sectional area, and the feed rod is located at the end of the cone 3 with a larger cross-sectional area. Therefore, when the material enters the interior of the outer cylinder 1 through the feed pipe 2, the material can be quickly spread out by the larger screw pitch and the cone 3 with a conical shape, so that the solid material can be quickly flattened, the accumulation of solid material can be reduced, and the friction between solid materials can be avoided from affecting the rotation of the screw.

[0042] The height of the spiral blades 4 gradually increases, and the diameter of the cone 3 gradually decreases, which enables the material to gather quickly and reduces the contact area between the molten, sticky plastic and the inner wall of the outer cylinder 1, thereby reducing resistance.

[0043] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A modified plastic low-resistance rotary heating screw structure, characterized in that, Including: The outer cylinder (1) is located in the inner cavity of the modified plastic extruder. The outer cylinder (1) is conical and the top of the outer cylinder (1) is provided with a feed pipe (2). The outer cylinder (1) is rotatably equipped with a cone (3), and two helical blades (4) are wound around the outer peripheral wall of the cone (3). One end of the two helical blades (4) is equipped with a connecting pipe (5), which is connected to the inner cavity of the cone (3). The helical blades (4) are equipped with a flow channel (6). Heating component (7), which is located at one end of outer cylinder (1), is used to heat the medium and make it circulate inside the spiral blade (4) and cone (3).

2. The modified plastic low-resistance rotary heating screw structure according to claim 1, characterized in that, The other end of the two spiral blades (4) is provided with a connecting cylinder (8), and a feeding pipe (9) is provided inside the connecting cylinder (8), which is connected to the inner cavity of the cone (3).

3. The modified plastic low-resistance rotary heating screw structure according to claim 2, characterized in that, The pitch of both spiral blades (4) gradually decreases from the end with the larger cross-sectional area of ​​the cone (3) to the other end, and the height of the spiral blades (4) gradually increases.

4. The modified plastic low-resistance rotary heating screw structure according to claim 3, characterized in that, The height of the two spiral blades (4) gradually increases from the end with the larger cross-sectional area of ​​the cone (3) to the other end.

5. The modified plastic low-resistance rotary heating screw structure according to claim 4, characterized in that, The heating component (7) includes: The circulating pump (71) has a medium cylinder (72) at its feed end, and the medium cylinder (72) is connected to the connecting cylinder (8). The circulating pump (71) has a heating pipe (73) at its discharge end, and the other end of the heating pipe (73) is connected to the feed pipe (9).

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