CN219171634U

CN219171634U - Double-screw extruder for strengthening shearing

Info

Publication number: CN219171634U
Application number: CN202320086912.XU
Authority: CN
Inventors: 张敏; 朱秀清; 张文; 盛积飞
Original assignee: Changzhou Yinuo Poly Tech Co ltd
Current assignee: Changzhou Yinuo Poly Tech Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-06-13
Anticipated expiration: 2033-01-30

Abstract

The utility model discloses a double-screw extruder for strengthening shearing, which comprises a charging barrel, a screw, a driving motor, a charging hopper, a charging motor and an electric heating assembly, wherein the driving motor is connected with the screw through a speed reducer, the electric heating assembly is arranged at the lower end of the charging barrel, the charging hopper is arranged at the upper end of the charging barrel, the upper end of the charging barrel is provided with an exhaust hole, the side end face of the screw is provided with a helical blade, and the surface of the helical blade is provided with a pushing rib. According to the utility model, the pushing ribs are added on the surface of the screw, so that the friction force between the screw blade and the material is increased, the axial feeding pressure of the screw to the material is increased, and the air flow grooves and the air exhaust holes are matched, so that air bubbles in the material can be fully discharged under pressure, the quality of a product is improved, and the shearing force between the screw blade and the material is greatly increased by arranging the tooth groove structure on the side end surface of the screw blade, so that the mixing effect of the screw blade is improved, and the tooth groove enables the screw blade to have a certain crushing capacity on the material.

Description

Double-screw extruder for strengthening shearing

Technical Field

The utility model relates to the technical field of extruders, in particular to a double-screw extruder for strengthening shearing.

Background

The twin-screw extruder relies on twin-screw to carry out the pugging to the mixed material of production plastic granules, because the barrel space of holding screw rod is airtight, the feeding pressure extrusion discharge of the whole leaning on screw rod of bubble that material compounding process produced, but current screw rod surface is mostly smooth structure, lead to the screw rod to the feeding pressure of material less, need add partial antifatigue agent, fire retardant etc. in the plastics processing work, add little, consequently the homogeneity of compounding will influence the product quality between will, because the screw rod of extruder is smooth, lead to the shearing force between screw rod and the material less, thereby influence the homogeneity of compounding.

For example, the grant publication CN217319233U is a twin-screw extruder, which comprises a driving device, a mixing device, a sealing device and a temperature control device, wherein the mixing device comprises two screws connected with the driving device and arranged in parallel and a barrel sleeved outside the two screws, a runner is formed in each screw along the length direction of the screws, two ends of the runner are located at one end of the screw close to the driving device, the sealing device is used for sealing one end of the screw close to the driving device, and the temperature control device is used for conveying heat conduction oil to the sealing device so as to supply the heat conduction oil to the runner and receiving the heat conduction oil flowing back from the runner.

The above-mentioned disclosed twin-screw extruder also has the above-mentioned problems, and the surface of the screw of the extruder is too smooth, so that the shearing force between the screw and the material is small, the uniformity of material mixing is affected, the feeding pressure is affected, bubbles in the material cannot be fully discharged, and the quality of the final product is affected, so that a reinforced shearing twin-screw extruder is needed to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a double-screw extruder for strengthening shearing, which aims to solve the problem that the shearing force between a screw rod and materials of the double-screw extruder in the prior art affects the mixing and exhaust of the materials.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a intensive shearing's twin-screw extruder, includes feed cylinder, screw rod, driving motor, throws the hopper, throws material motor, electric heating element, driving motor passes through the reduction gear with the screw rod and is connected, electric heating element installs the lower extreme at the feed cylinder, throw the hopper and install the upper end at the feed cylinder, the upper end of feed cylinder is provided with the exhaust hole, the side terminal surface of screw rod is provided with helical blade, helical blade's surface is provided with the pushing bar.

Preferably, the pushing bar is a semi-cylindrical stainless steel bar, and the feeding pressure of the material when the screw is rotated is increased through the pushing bar.

Preferably, the front view included angle of the adjacent pushing bars is ninety degrees, and the pushing bars are uniformly distributed, so that the pushing uniformity is ensured.

Preferably, the top of the inner end surface of the charging barrel is provided with an air flow groove, and the air flow groove is in through connection with the air exhaust hole, so that air in the material is timely discharged from the air exhaust hole along the air flow groove.

Preferably, the air flow groove is a semi-cylindrical notch, and the width of the air flow groove is smaller than the overflow value of the material, so that the air flow groove is prevented from being blocked by the material.

Preferably, the edge of the helical blade is provided with a tooth slot, and the shearing force on materials during rotation of the screw is increased by arranging the tooth slot, so that the mixing effect is improved.

Preferably, the tooth groove is shaped like a rounded trapezoid, so that the inside of the tooth groove is reduced.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the pushing ribs are added on the surface of the screw, so that the friction force between the helical blade and the material is increased, the axial feeding pressure of the screw to the material is increased, and the air bubbles in the material can be fully discharged under pressure by matching with the air flow grooves and the air exhaust holes, so that the product quality is improved.

2. According to the utility model, the tooth groove structure is arranged on the side end surface of the spiral blade, so that the shearing force between the screw and the material is greatly increased, the mixing effect of the screw is improved, the tooth groove enables the spiral blade to have certain crushing capacity on the material, the mixing effect is further improved, and the quality of a final product is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a cross-sectional view of FIG. 2 A-A in accordance with the present utility model;

fig. 4 is an enlarged view of fig. 3B in accordance with the present utility model.

In the figure: 1 charging barrel, 11 exhaust hole, 12 air flow groove, 2 driving motor, 3 charging hopper, 4 charging motor, 5 electric heating component, 6 screw rod, 61 helical blade, 611 pushing bar, 612 tooth slot.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

Referring to fig. 1 to 4, a double screw extruder for strengthening shearing in the drawings comprises a charging barrel 1, a screw rod 6, a driving motor 2, a charging hopper 3, a charging motor 4 and an electric heating assembly 5, wherein the driving motor 2 is connected with the screw rod 6 through a speed reducer, the electric heating assembly 5 is arranged at the lower end of the charging barrel 1, the charging hopper 3 is arranged at the upper end of the charging barrel 1, an exhaust hole 11 is arranged at the upper end of the charging barrel 1, a helical blade 61 is arranged on the side end face of the screw rod 6, and a pushing rib 611 is arranged on the surface of the helical blade 61.

The pushing bar 611 is a semi-cylindrical stainless steel bar, and the feeding pressure of the materials when the screw 6 rotates is increased through the pushing bar 611.

The front view included angle of the adjacent pushing bars 611 is ninety degrees, and the adjacent pushing bars are uniformly distributed, so that the pushing uniformity is ensured.

The top of the inner end surface of the charging barrel 1 is provided with an air flow groove 12, and the air flow groove 12 is in through connection with the exhaust hole 11, so that the air in the material is timely discharged from the exhaust hole 11 along the air flow groove 12.

The air flow groove 12 is a semi-cylindrical notch, the width of the air flow groove 12 is smaller than the overflow value of the material, and the air flow groove 12 is prevented from being blocked by the material.

The edge of the helical blade 61 is provided with tooth grooves 612, and the shearing force on materials during rotation of the screw 6 is increased by arranging the tooth grooves 612, so that the mixing effect is improved.

The tooth slots 612 are shaped in a rounded trapezoid structure to reduce the internal space of the tooth slots 612.

The device is used when: the material is put into equipment by the feeding hopper 3, the feeding motor 4 is started, the material is transported into the charging barrel 1 by the feeding motor 4, then the driving motor 2 is started, the driving motor 2 drives the screw rod 6 to rotate, the material is driven to overturn and feed, meanwhile, the electric heating assembly 5 is started to heat the material, the material is melted, the friction force between the helical blade 61 and the material is increased by adding the pushing rib 611 on the surface of the screw rod 6, the axial feeding pressure of the screw rod 6 to the material is increased, the air flow groove 12 and the exhaust hole 11 are matched, air bubbles in the material can be fully discharged under pressure, the shearing force between the screw rod 6 and the material is greatly increased by arranging the tooth groove 612 structure on the side end face of the helical blade 61, the mixing effect of the screw rod 6 is improved, and the tooth groove 612 enables the helical blade 61 to have certain crushing capacity to the material, and the mixing effect is further improved.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A shear-enhancing twin screw extruder comprising:

feed cylinder (1), screw rod (6), driving motor (2), throw hopper (3), throw material motor (4), electric heating component (5), driving motor (2) are connected through the reduction gear with screw rod (6), electric heating component (5) are installed in the lower extreme of feed cylinder (1), throw hopper (3) and install the upper end at feed cylinder (1), the upper end of feed cylinder (1) is provided with exhaust hole (11), the side terminal surface of screw rod (6) is provided with helical blade (61), the surface of helical blade (61) is provided with pushing rib (611).

2. The shear-enhancing twin screw extruder of claim 1, wherein: the pushing bar (611) is a semi-cylindrical stainless steel bar.

3. The shear-enhancing twin screw extruder of claim 1, wherein: the front view included angle of the adjacent pushing bars (611) is ninety degrees.

4. The shear-enhancing twin screw extruder of claim 1, wherein: the top of the inner end surface of the charging barrel (1) is provided with an air flow groove (12), and the air flow groove (12) is in through connection with the exhaust hole (11).

5. The shear-enhancing twin screw extruder of claim 4, wherein: the airflow groove (12) is a semi-cylindrical notch, and the width of the airflow groove (12) is smaller than the edge overflow value of the material.

6. The shear-enhancing twin screw extruder of claim 1, wherein: the edge of the spiral blade (61) is provided with a tooth slot (612).

7. The shear-enhancing twin screw extruder of claim 6, wherein: the tooth slot (612) is in a rounded trapezoid structure.