CN109664429B

CN109664429B - Continuous kneading machine of modularization multicavity room

Info

Publication number: CN109664429B
Application number: CN201811541035.0A
Authority: CN
Inventors: 刘晶; 魏宗亮; 秦能; 谢中元; 陈松; 王勇; 孙晓朋; 李萌
Original assignee: Xian Modern Chemistry Research Institute
Current assignee: Xian Modern Chemistry Research Institute
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2021-04-13
Anticipated expiration: 2038-12-17
Also published as: CN109664429A

Abstract

The invention discloses a modular multi-cavity continuous kneader which can be suitable for high-solid-content composite materials, flexible equipment, sufficient kneading and the like. The device includes hopper 8, chamber 6, paddle 7, sieve 9, connecting screw 5, support 4, guide rail 2, fastening screw 3, base 1, provide bigger moment of torsion through carrying out independent drive to each paddle, adapt to the material of different solid contents through the chamber number that changes series arrangement, the dwell time of adjustment material, to pushing the material tangential when realizing the material through the incorgruous rotation of paddle and kneading, realize the continuous circulation of material between the chamber. The invention makes up the defects of the prior screw continuous kneading process, the dual-rotor continuous mixing process, the multi-chamber continuous kneading process and the like, improves the kneading capacity of kneading equipment, has higher flexibility and stronger autonomy, and enlarges the application range of the equipment.

Description

Continuous kneading machine of modularization multicavity room

Technical Field

The invention belongs to the field of continuous kneading, and relates to a multi-cavity continuous kneader, in particular to a modular multi-cavity kneader for continuously kneading high-solid-content materials.

Background

In recent years, due to the development of new composite resin materials, particularly, the number of types of high-viscosity composite materials is increasing, and the solid content ratio of the composite materials is increasing, so that the demand for a continuous kneading apparatus to improve the kneading ability and to have a wider application range is increasing.

Currently, the commonly used continuous kneading process includes a screw continuous kneading process, a double-rotor continuous kneading process, a multi-chamber continuous kneading process, and the like. However, the screw continuous kneading process has the problems that the output torque is limited for the emerging composite resin material, the screw continuous kneading process is not suitable for the composite material with excessively high solid content, the equipment is suitable for single material, and the like; in the double-rotor continuous mixing process, because gaps between rotors and between rotors and a machine barrel are large, when a composite resin material with high viscosity and a high molecular weight polymer containing small component fillers developed in recent years are kneaded, a large shearing force cannot be provided, and further, the composite resin material cannot be sufficiently kneaded; the multi-chamber continuous kneading process has a large output torque and high kneading capacity, but cannot respond to the requirements of different kneading temperatures, different shear stresses, different residence times and the like required for different high-viscosity composite materials due to the small variable parameters of the equipment.

Aiming at the problems and the defects in the prior art, the modularized multi-cavity continuous kneader is designed, and has the characteristics of adjustable cavity number, adjustable blade combination, independently controllable rotating speed of blades of each cavity, independently controllable temperature of each cavity and the like, can be suitable for kneading materials with different viscosities, different solid contents and different formulas, improves the kneading capacity of kneading equipment, can freely change equipment components according to different formulas, has stronger autonomy and expands the application range.

Disclosure of Invention

In order to overcome the disadvantages of the prior art, the object of the present invention is to develop a modular multi-chamber continuous kneader with greater flexibility and kneading capacity.

In order to achieve the purpose, the invention adopts the following technical scheme:

a modular multi-chamber continuous kneader, characterized by comprising: the device comprises a hopper, a chamber, a paddle, a sieve plate, a connecting screw, a bracket, a guide rail, a fastening screw and a base; wherein the hopper is mounted above the chamber by bolts; the chamber is arranged on the guide rail through a bracket and is positioned and locked through a fastening screw; the guide rail is fixed on the base; the paddle is installed in the cavity, and the screen plate is installed at the interface.

The modular multi-cavity continuous kneader has the cavity in a vertical 8 shape and comprises a feeding cavity, a kneading cavity and a discharging cavity; the feeding chamber, the kneading chamber and the discharging chamber are arranged in series, and the chambers are fixed through connecting screws; a feed inlet is formed in the upper end of the feed chamber; the number of the kneading chambers needs to be adjusted according to different solid contents, the more the composite resin materials contain, the more the kneading times needed for uniformly mixing the materials are, the number of the kneading chambers is adjusted to increase the kneading time of the materials, the mixing uniformity of the materials can be improved, the solid content is less than 30%, the number of the kneading chambers is 3, the solid content is 30% -50%, the number of the kneading chambers is 4, the solid content is 50% -80%, the number of the kneading chambers is 6, the solid content is more than 80%, and the number of the kneading chambers is 10; a discharge hole is formed in the side surface of the discharge chamber; the chambers can be provided with water jackets to independently control temperature changes.

Above-mentioned modularization multi-chamber continuous kneader, the sieve is fixed by the recess between the cavity, through the aperture of adjustment sieve, is detained the massive not plasticized combined material in last cavity and is kneaded continuously, and then improves the plastify degree of consistency of composite resin material, and the aperture of sieve reduces along the flow direction of material gradually, and the minimum aperture of sieve is greater than 3 times of solid-phase particle diameter.

According to the modular multi-cavity continuous kneader, a pair of paddles are arranged in each cavity, each paddle is coaxial with the upper semicircle and the lower semicircle of the corresponding cavity, and the minimum gap between each pair of paddles is 3 times of the particle size of solid-phase particles; the paddles are twisted along the axial direction, wherein the paddles positioned on the upper semicircle of the chamber are right-handed screws, the paddles positioned on the lower semicircle of the chamber are left-handed screws, each pair of paddles rotate in different directions, and provide tangential force for the materials while kneading the materials, so that the materials are pushed to move laterally and enter the next chamber; the blades of the discharging chamber are dumbbell-shaped, and provide larger lateral thrust for the materials to push the materials out of the discharging hole; each paddle is independently controlled by a transmission device, and the tail end of each paddle is provided with a spline and is connected with the transmission device to transmit power.

According to the modular multi-cavity continuous kneader, the support is fixed at the lower end of each cavity through screws, the lower end of the support is in a dovetail shape, so that the support can be conveniently installed on a guide rail, and threaded holes are formed in four corners of the support and used for being fixed with the guide rail.

According to the modular multi-cavity continuous kneader, dovetail grooves are formed in the guide rails, and waist-shaped through holes are formed in the length of every other cavity and used for positioning and fixing the corresponding support.

According to the modular multi-chamber continuous kneader, the fastening screws penetrate through waist-shaped through holes in the guide rails and are installed in the threaded holes in the support.

Compared with the prior art, the invention has the advantages that: can provide larger torque and is suitable for high-solid-content composite materials, flexible equipment, sufficient kneading and the like. This advantage is achieved by a technique that relies on three aspects: (1) each paddle is independently driven, the output shaft is short, large torque can be borne, the gap between the paddles is adjustable, kneading is more sufficient, and no kneading dead angle exists; (2) the plurality of chambers are connected in series, the number of the chambers can be adjusted according to the solid content of the material, the material is kneaded under the action of the paddle and is transversely moved under the action of tangential force, continuous feeding, continuous kneading, continuous conveying and continuous discharging can be realized, and the retention time of the material can be adjusted; (3) the aperture of the sieve plate and the gap between the paddles are adjusted according to the particle size of solid-content particles, the kneading is more sufficient, and the applicable material range is wider.

Drawings

FIG. 1: a schematic structure of the modular multi-chamber continuous kneader.

In the figure, 1, a base, 2, a guide rail, 3, a fastening screw, 4, a bracket, 5, a connecting screw, 6, a chamber, a feeding chamber, 7, a blade, 8, a hopper, 9, a sieve plate, 10, a kneading chamber, 11, a discharging chamber and 12, a discharging port are arranged.

Detailed Description

The invention is further described with reference to the drawings and the detailed description.

Example 1

The modular multi-chamber continuous kneader described in this example was used mainly for kneading of sodium sulfate powder having a solid content of 40% and a particle size of 350 μm with HTPB.

Referring to fig. 1, the feeding chamber 6, the kneading chamber 10 and the discharging chamber 11 are arranged in series, and the chambers are fixed by connecting screws 5; the upper end of the feeding cavity 6 is provided with a feeding hole; the number of the kneading chambers 10 is 4; and a discharge hole 10 is formed in the side surface of the discharge chamber 11.

Referring to fig. 1, the sieve plates 9 are fixed between the chambers 6 by grooves, and the aperture of the sieve plates is 5mm, 4mm, 3mm, 2mm, and 1mm in sequence.

Referring to fig. 1, the minimum clearance between the paddles 7 is 1 mm; the paddles 7 are twisted along the axial direction, wherein the paddles positioned in the upper semicircle of the chamber are right-handed screws, the paddles positioned in the lower semicircle of the chamber are left-handed screws, and each pair of paddles 7 rotates in a different direction; the blades 7 of the discharging chamber 11 are dumbbell-shaped; the tail ends of the blades 7 are provided with splines, and each blade 7 is independently controlled by a servo motor.

Example 2

The modular multi-chamber continuous kneader described in this example was used mainly for kneading calcium carbonate powder having a solid content of 60% and a particle size of 1 μm with cellulose acetate in triacetin.

The feeding chamber 6, the kneading chamber 10 and the discharging chamber 11 are arranged in series, and the chambers are fixed with the chamber 6 through a connecting screw 5; the upper end of the feeding cavity 6 is provided with a feeding hole; the number of the kneading chambers 10 is 6; a discharge hole is formed in the side surface of the discharge chamber 11; a heating water jacket is arranged in the kneading chamber 10, and the heating temperature is 40 ℃.

The sieve plates 9 are fixed by the grooves among the chambers 6, and the aperture of the sieve plates 9 is 45 meshes, 100 meshes, 200 meshes, 400 meshes, 800 meshes, 1250 meshes and 2500 meshes in sequence.

The minimum clearance between the paddles 7 is 0.5 mm; the paddles 7 are twisted along the axial direction, wherein the paddles positioned in the upper semicircle of the chamber are right-handed screws, the paddles positioned in the lower semicircle of the chamber are left-handed screws, and each pair of paddles 7 rotates in a different direction; the blades 7 of the discharging chamber 11 are dumbbell-shaped; the tail end of the paddle 7 is provided with a spline, and each paddle is independently controlled by a hydraulic motor.

The invention is not limited to the above-described embodiments, the technical solutions of which have been described in the summary of the invention.

Claims

1. A modular multi-chamber continuous kneader comprising: the device comprises a hopper (8), a chamber (6), a paddle (7), a sieve plate (9), a connecting screw (5), a bracket (4), a guide rail (2), a fastening screw (3) and a base (1); wherein the hopper (8) is mounted above the chamber (6) by bolts; the chamber (6) is arranged on the guide rail (2) through a bracket (4) and is positioned and locked through a fastening screw (3); the guide rail (2) is fixed on the base (1); the chamber (6) is internally provided with a paddle (7), and a sieve plate (9) is arranged at an interface;

the chamber (6) is in a vertical 8 shape and comprises a feeding chamber (6), a kneading chamber (10) and a discharging chamber (11); the feeding chamber (6), the kneading chamber (10) and the discharging chamber (11) are arranged in series, and the chambers are fixed through connecting screws (5); the upper end of the feeding cavity (6) is provided with a feeding hole; the number of the kneading chambers (10) needs to be adjusted according to different solid contents, the solid content is less than 30%, the number of the kneading chambers (10) is 3, the solid content is 30% -50%, the number of the kneading chambers (10) is 4, the solid content is 50% -80%, the number of the kneading chambers (10) is 6, the solid content exceeds 80%, and the number of the kneading chambers (10) is 10; a discharge hole (12) is formed in the side surface of the discharge chamber (11); the chambers (6) can be provided with water jackets for independent temperature control;

a groove is arranged between the chambers (6) to fix the sieve plates (9), the aperture of the sieve plates (9) is gradually reduced along the flowing direction of the materials, and the minimum aperture of the sieve plates (9) is larger than 3 times of the particle size of solid-phase particles;

a pair of paddles (7) are arranged in each cavity (6), each paddle (7) is coaxial with the upper semicircle and the lower semicircle of the corresponding cavity (6), and the minimum gap between each pair of paddles (7) is 3 times of the particle size of solid-phase particles; the paddles (7) are twisted along the axial direction, wherein the paddles (7) positioned in the upper semicircle of the chamber (6) are right-handed screws, the paddles (7) positioned in the lower semicircle are left-handed screws, and each pair of paddles (7) rotate in different directions; the blades (7) of the discharging chamber (11) are dumbbell-shaped; each paddle (7) is independently controlled by a transmission device, and the tail end of each paddle (7) is provided with a spline;

the support (4) is fixed at the lower end of each chamber (6) through screws, the lower end of the support (4) is in a dovetail shape and is used for being in butt joint with the guide rail (2), and threaded holes are formed in four corners of the support;

dovetail grooves are formed in the guide rail (2), and kidney-shaped through holes are formed in every other chamber (6) in length;

the fastening screw (3) passes through the waist-shaped through hole on the guide rail (2) and is arranged in the threaded hole on the bracket (4).