CN221112800U - Nine-edge meshing rotor element of extruder and double-screw extruder thereof - Google Patents

Abstract

The utility model discloses an extruder and a nine-edge meshing rotor element of a double-screw extruder thereof, and relates to the technical field of extruders, wherein the nine-edge meshing rotor element of the double-screw extruder comprises: the right-side rotor element comprises three right-hand long edges uniformly distributed along the middle end of the right-side rotor element, three front left-hand short edges uniformly distributed along the front end of the right-side rotor element and three rear left-hand short edges uniformly distributed along the rear end of the right-side rotor element, wherein each right-hand long edge is right-hand at a first angle relative to the central axis of the right-side rotor element, each front left-hand short edge is left-hand at a second angle relative to the central axis of the right-side rotor element, each rear left-hand short edge is left-hand at a second angle relative to the central axis of the right-side rotor element, and each right-hand long edge, each front left-hand short edge and each rear left-hand short edge are provided with a diversion trench; a left rotor element that is a mirror image of the right rotor element. The device can improve the material mixing effect of the parallel anisotropic double screw extruder.

Description

Nine-edge meshing rotor element of extruder and double-screw extruder thereof

Technical Field

The utility model relates to the technical field of extruders, in particular to a nine-edge meshing rotor element of a double-screw extruder, and further relates to an extruder comprising the nine-edge meshing rotor element of the double-screw extruder.

Background

In the related art, in the field of traditional rubber processing, parallel anisotropic double screw extruders mostly adopt spiral rib symmetrical distribution's double-end screw components or meshing piece component to play transport and shearing effect respectively to the material, realize relatively clear function in single structure, simultaneously, adopt symmetrical distribution's double-end screw components to be convenient for change the accessory, realize the structure standardization. However, due to the single function of the single structure, when the complex material mixing requirement exists, the complex function is realized by connecting a plurality of screw elements in series, so that the whole structure of the device is redundant, the length of the whole screw is continuously increased along with the increase of the number of the screw elements, and the screw abrasion caused by bending deformation is also more obvious.

In summary, how to improve the material mixing effect of the parallel anisotropic twin-screw extruder and to simplify the screw structure is a problem to be solved by those skilled in the art.

Disclosure of utility model

Therefore, the utility model aims to provide a nine-edge meshing rotor element of a double-screw extruder, which can effectively improve the material mixing effect of a parallel anisotropic double-screw extruder and simplify the screw structure.

It is a further object of the present utility model to provide an extruder comprising the nine-sided intermeshing rotor elements of the twin screw extruder described above.

In order to achieve the above object, the present utility model provides the following technical solutions:

a nine-sided intermeshing rotor element for a twin screw extruder comprising:

The right-side rotor element comprises three right-hand long edges uniformly distributed along the outer periphery of the middle end of the right-side rotor element, three front left-hand short edges uniformly distributed along the outer periphery of the front end of the right-side rotor element and three rear left-hand short edges uniformly distributed along the outer periphery of the rear end of the right-side rotor element, wherein each right-hand long edge is right-hand at a first angle relative to the central axis of the right-side rotor element, each front left-hand short edge is left-hand at a second angle relative to the central axis of the right-side rotor element, each rear left-hand short edge is left-hand at the second angle relative to the central axis of the right-side rotor element, and each right-hand long edge, the front left-hand short edge and the rear left-hand short edges are provided with guide grooves;

a left rotor element mirrored from the right rotor element;

And the central shaft holes of the right rotor element and the left rotor element are respectively internally provided with the central shaft shafts so as to drive the right rotor element and the left rotor element to oppositely mesh and rotate.

Preferably, the lengths of the front left-hand short rib and the rear left-hand short rib are the same, and the same number of the diversion trenches are arranged;

The length ratio of the right-hand long edge to the front left-hand short edge is n, and the ratio of the number of the diversion trenches on the right-hand long edge to the number of the diversion trenches on the front left-hand short edge is n.

Preferably, the width of the edge bottoms of the right-hand long edge, the front left-hand short edge and the rear left-hand short edge are all less than or equal to 1/12 of the circumference of the edge bottom circle of the right-side rotor element;

The width of the edge tops of the right-hand long edge, the front left-hand short edge and the rear left-hand short edge are all smaller than or equal to 1/30 of the circumference of the edge top circle of the right-side rotor element.

Preferably, the cross sections of the diversion trenches on the right-handed long edges, the front left-handed short edges and the rear left-handed short edges are isosceles trapezoids, and the depth of each diversion trench is 1/3 to 1/2 of the height of the corresponding edge.

Preferably, a plurality of first right side diversion trenches are arranged on the right-hand long edge at equal intervals, and the interval between two adjacent first right side diversion trenches is larger than or equal to the widest interval of the cross sections of the first right side diversion trenches;

The distance from the two ends of the first right side diversion trench to the two end faces of the right-handed long edge is larger than or equal to the widest distance between the cross sections of the first right side diversion trench.

Preferably, a second right side diversion trench is arranged in the middle of the rear left-hand short edge, the opening length of the second right side diversion trench is twice that of the first right side diversion trench, and the distances from the two ends of the second right side diversion trench to the two ends of the rear left-hand short edge are equal;

The middle part of preceding left-hand short arris is equipped with a third right side guiding gutter, the opening length of third right side guiding gutter is the opening length of first right side guiding gutter twice, the distance of the both ends of third right side guiding gutter to the both ends of preceding left-hand short arris equals.

Preferably, the bottoms of the first right side diversion trench, the second right side diversion trench and the third right side diversion trench are all provided with rounded corners.

Preferably, the right rotor element and the spindle, the left rotor element and the spindle are all connected by involute splines.

Preferably, the first angle is 60 ° and the second angle is 36 °.

An extruder comprising the nine-sided intermeshing rotor element of the twin screw extruder of any one of the preceding claims.

When the nine edges of the double-screw extruder provided by the utility model are meshed with the rotor elements, as the left rotor element and the right rotor element are in mirror image distribution, namely the left rotor element comprises three left-handed long edges uniformly distributed along the outer periphery of the middle end of the left rotor element, three front right-handed short edges uniformly distributed along the outer periphery of the front end of the left rotor element and three rear right-handed short edges uniformly distributed along the outer periphery of the rear end of the left screw, each left-handed long edge is left-handed by a first angle relative to the central axis of the left rotor element, each front right-handed short edge is right-handed by a second angle relative to the central axis of the left rotor element, and each rear right-handed short edge is provided with a guide groove.

When materials enter the double-screw extruder, the materials can move to a nine-edge meshing rotor element of the device through other conveying thread elements, and left and right side materials are respectively contacted with a rear left-hand short edge and a rear right-hand short edge firstly;

The material which is not in direct contact with the rear left-hand short edge and the rear right-hand short edge gradually moves forwards through the spiral grooves (grooves formed among the edges) under the pushing of the subsequent material, the materials which are passively and forwards flowing at two sides are respectively shunted when passing through the diversion grooves on the rear left-hand short edge and the rear right-hand short edge, and a small amount of materials reach the back of the rear left-hand short edge and the rear right-hand short edge through the diversion grooves on the rear left-hand short edge and the rear right-hand short edge and reach the right-hand long edge and the left-hand long edge respectively;

meanwhile, the materials which do not pass through the diversion trenches on the rear left-hand short edge and the rear right-hand short edge gradually move forwards under the pushing of the materials which are added subsequently until reaching the positions of the right-hand long edge and the left-hand long edge. Because the right-hand long edge and the left-hand long edge are both forward spiral, the right-hand long edge and the left-hand long edge can generate thrust for contacted materials to advance along the spiral line direction of the edges, during the forward movement of the material, a small amount of material is split by the diversion trenches on the right-hand long edges and the left-hand long edges, part of the material flows backwards, and part of the material passes through the spiral grooves to reach the other right-hand long edges and the left-hand long edges to be mixed with other materials;

the materials which do not pass through the diversion trenches on the right-hand long edges and the left-hand long edges continue to move forwards, and after reaching the front left-hand short edges and the front right-hand short edges, the materials are subjected to the reverse spiral pushing action of the front left-hand short edges and the front right-hand short edges, and flow back and forth alternately to be mixed again continuously;

As the materials added subsequently are continuously increased, the materials pushed back by the front left-hand short edge and the front right-hand short edge are forced to move forwards, and flow division occurs when the materials pass through the flow guide grooves of the front left-hand short edge and the front right-hand short edge, namely, the materials passing through the flow guide grooves of the front left-hand short edge and the front right-hand short edge flow backwards to the positions of the right-hand long edge and the left-hand long edge to be mixed with other materials, and the materials can be pushed forwards by the right-hand long edge and the left-hand long edge to continue to move forwards until the follow-up materials fill the spiral grooves, and the materials in front are pushed to the next nine-edge meshing rotor elements;

Because the left rotor element and the right rotor element are meshed with each other and rotate, materials in the meshed areas of the left rotor element and the right rotor element are continuously extruded under the interaction of a plurality of ribs, and because the meshing space is continuously changed, the force applied to the materials is also continuously changed, the flow rate of the materials in the meshed areas is also suddenly changed due to the change of stress, the speed suddenly changes can strengthen the dispersion condition of different materials, so that the distribution of the materials is more uniform, and meanwhile, the shearing generated by the sudden change of the speed of the materials can break the aggregation of the materials, so that the powder in the finally produced finished product is finer. In addition, the device can realize the functions of conveying and shearing materials, and a plurality of screw elements with single functions are not required to be connected in series, so that the structure is simpler.

In summary, the nine-edge meshing rotor element of the double-screw extruder provided by the utility model can effectively improve the material mixing effect of the parallel anisotropic double-screw extruder and simplify the screw structure.

In addition, the utility model also provides an extruder comprising the nine-edge meshing rotor element of the double-screw extruder.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is an isometric view of a nine-sided intermeshing rotor element of a twin screw extruder provided by the present utility model;

FIG. 2 is a schematic cross-sectional view of a nine-sided intermeshing rotor element of a twin screw extruder;

FIG. 3 is an axial block diagram of a nine-sided intermeshing rotor element of a twin screw extruder;

FIG. 4 is a plan expanded view of the right rotor element;

Fig. 5 is a plan expanded view of the left rotor element.

In fig. 1-5:

1 is a right-side rotor element, 101 is a right-hand long edge, 102 is a first right-hand diversion trench, 103 is a front left-hand short edge, 104 is a third right-hand diversion trench, 105 is a back left-hand short edge, 106 is a second right-hand diversion trench, 2 is a left-side rotor element, 201 is a left-hand long edge, 202 is a first left-hand diversion trench, 203 is a front right-hand short edge, 204 is a third left-hand diversion trench, 205 is a back right-hand diversion trench, 206 is a second left-hand diversion trench, and 3 is an involute internal spline through hole.

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.

The utility model provides a nine-edge meshing rotor element of a double-screw extruder, which can effectively improve the material mixing effect of a parallel anisotropic double-screw extruder and simplify the screw structure.

Another core of the present utility model is to provide an extruder comprising the nine-sided intermeshing rotor elements of the twin screw extruder described above.

Referring to fig. 1 to 5, fig. 1 is an isometric view of a nine-edge meshing rotor element of a twin-screw extruder provided by the present utility model; FIG. 2 is a schematic cross-sectional view of a nine-sided intermeshing rotor element of a twin screw extruder; FIG. 3 is an axial block diagram of a nine-sided intermeshing rotor element of a twin screw extruder; FIG. 4 is a plan expanded view of the right rotor element; fig. 5 is a plan expanded view of the left rotor element.

This particular embodiment provides a nine-sided intermeshing rotor element for a twin screw extruder comprising:

The right rotor element 1 comprises three right-hand long edges 101 uniformly distributed along the outer periphery of the middle end of the right rotor element 1, three front left-hand short edges 103 uniformly distributed along the outer periphery of the front end of the right rotor element 1 and three rear left-hand short edges 105 uniformly distributed along the outer periphery of the rear end of the right rotor element 1, wherein each right-hand long edge 101 is right-hand at a first angle relative to the central axis of the right rotor element 1, each front left-hand short edge 103 is left-hand at a second angle relative to the central axis of the right rotor element 1, each rear left-hand short edge 105 is left-hand at a second angle relative to the central axis of the right rotor element 1, and each right-hand long edge 101, front left-hand short edge 103 and rear left-hand short edge 105 are provided with guide grooves;

a left rotor element 2 which is mirror-image distributed with the right rotor element 1;

The central shaft holes of the right rotor element 1 and the left rotor element 2 are respectively provided with a central shaft so as to drive the right rotor element 1 and the left rotor element 2 to oppositely mesh and rotate.

Since the left rotor element 2 and the right rotor element 1 are in mirror image distribution, that is, the left rotor element 2 includes three left-hand long edges 201 uniformly distributed along the outer periphery of the middle end of the left rotor element 2, three front right-hand short edges 203 uniformly distributed along the outer periphery of the front end of the left rotor element 2, and three rear right-hand short edges 205 uniformly distributed along the outer periphery of the rear end of the left rotor element 2, each left-hand long edge 201 is left-hand at a first angle with respect to the central axis of the left rotor element 2, each front right-hand short edge 203 is right-hand at a second angle with respect to the central axis of the left rotor element 2, and each rear right-hand short edge 205 is right-hand at a second angle with respect to the central axis of the left rotor element 2, and the left-hand long edges 201, the front right-hand short edges 203, and the rear right-hand short edges 205 are provided with flow guide grooves. Since the left rotor element 2 and the right rotor element 1 are completely symmetrical and mirror images of each other, the left rotor element 2 and the right rotor element 1 are engaged with each other and rotated toward each other in operation.

It should be further noted that, the left rotor element 2 and the right rotor element 1 both include forward spiral edges and reverse spiral edges that are staggered, so that the shearing effect on the materials can be increased, and the different materials can be dispersed more uniformly. In addition, the forward and reverse spiral edges of the device are staggered, are not arranged in a segmented mode, are formed by connecting a plurality of structures with single functions in series, so that the structure is more compact, and redundancy is reduced.

In addition, the right rotor element 1 and the left rotor element 2 each use a round tube having a diameter of a truncated circle as a raw material, and are processed by a cutting process to obtain a desired structure. The shape, structure, size, etc. of the right rotor element 1, the left rotor element 2, and the spindle can be determined in the actual application process according to actual situations and actual demands.

On the basis of the above embodiment, it is preferable that the lengths of the front left-handed short rib 103 and the rear left-handed short rib 105 are the same, and the same number of diversion trenches are provided; the length ratio of the right-handed long rib 101 to the front left-handed short rib 103 is n, and the ratio of the number of the diversion trenches on the right-handed long rib 101 to the number of the diversion trenches on the front left-handed short rib 103 is n.

It should be noted that, since the left rotor element 2 and the right rotor element 1 are in mirror image distribution, the front right-hand short rib 203 and the rear right-hand short rib 205 have the same length and are provided with the same number of diversion trenches; the length ratio of the left-handed long rib 201 to the front right-handed short rib 203 is n, and the ratio of the number of the diversion trenches on the left-handed long rib 201 to the number of the diversion trenches on the front right-handed short rib 203 is n.

In addition, it should be noted that, the forward spiral (the long right-handed edge 101 and the long left-handed edge 201) can effectively realize material conveying, the reverse spiral (the short front left-handed edge 103, the short back left-handed edge 105, the short front right-handed edge 203 and the short back right-handed edge 205) can effectively increase the material residence time, and the length of the reverse spiral is shorter, so that the excessive local pressure caused by the incapability of forward flowing of the material can be avoided. In addition, the diversion trenches arranged on the forward spiral and the reverse spiral can provide more branches for the flow of materials, so that the mixing is more uniform, the specific arrangement condition of the diversion trenches is related to the length of the corresponding edges, and the diversion mixing effect of each edge is improved.

Preferably, the width of the edge bottoms of the right-hand long edge 101, the front left-hand short edge 103 and the rear left-hand short edge 105 are all less than or equal to 1/12 of the circumference of the edge bottom circle of the right-hand rotor element 1; the width of the edge tops of the right-hand long edge 101, the front left-hand short edge 103, and the rear left-hand short edge 105 are each less than or equal to 1/30 of the circumference of the edge top circle of the right-hand rotor element 1.

Since the left rotor element 2 and the right rotor element 1 are mirror images, the widths of the bottoms of the left-hand long edge 201, the front right-hand short edge 203, and the rear right-hand short edge 205 are all less than or equal to 1/12 of the circumference of the bottom circle of the left rotor element 2; the width of the tips of the left-hand long rib 201, the front right-hand short rib 203, and the rear right-hand short rib 205 are each less than or equal to 1/30 of the circumference of the tip circle of the left-hand rotor member 2. The left rotor element 2 and the right rotor element 1 are provided in such a way that the left rotor element 2 and the right rotor element 1 mesh with each other and do not interfere with each other when they are rotated in the opposite direction.

The bottom circle is a circle formed by connecting the bottom parts of the respective ribs, and the top circle is a circle formed by connecting the top parts of the respective ribs. Assuming that the width of the edge bottom is equal to 1/12 of the circumference of the edge bottom circle of the right rotor element 1, it may mean that the edge bottom is provided along the outer circumference of the edge bottom circle of the right rotor element 1, and the ratio of the arc length of the edge bottom to the arc length of the edge bottom circle of the right rotor element 1 is 1:12, the rib bottom is 30 ° wide. The width of the edge top is equal to 1/30 of the circumference of the edge top circle of the right rotor element 1, which may mean that the edge top is arranged along the outer circumference of the edge top circle of the right rotor element 1, and the ratio of the arc length of the edge top to the arc length of the edge top of the right rotor element 1 is 1:30, the ridge top is 12 ° wide. In this case, the right rotor element 1 is shown in fig. 4 in a plan view, and the left rotor element 2 is shown in fig. 5 in a plan view, with the first angle being 60 ° and the second angle being 36 °.

The shape, the size, the structure, the position and the like of each edge can be determined according to actual conditions and actual demands in the actual application process.

Preferably, the cross sections of the diversion trenches on the right-handed long rib 101, the front left-handed short rib 103 and the rear left-handed short rib 105 are isosceles trapezoids, and the depth of the diversion trenches is 1/3 to 1/2 of the height of the corresponding rib.

Since the left rotor element 2 and the right rotor element 1 are mirror images, the cross sections of the grooves of the left-hand long rib 201, the front right-hand short rib 203, and the rear right-hand short rib 205 are isosceles trapezoids, and the groove depth of the grooves is 1/3 to 1/2 of the height of the corresponding rib. The diversion trench is arranged in order to improve the material diversion effect of the diversion trench. Of course, the cross section of the diversion trench can be rectangular or circular.

On the basis of the above embodiment, it is preferable that the right-handed long rib 101 is provided with a plurality of first right-side diversion trenches 102 at equal intervals, and the interval between two adjacent first right-side diversion trenches 102 is greater than or equal to the widest interval of the cross sections of the first right-side diversion trenches 102; the distance from the two ends of the first right-side diversion trench 102 to the two end surfaces of the right-hand long edge 101 is larger than or equal to the widest distance between the cross sections of the first right-side diversion trench 102.

It should be noted that, since the left rotor element 2 and the right rotor element 1 are in mirror image distribution, the left-handed long rib 201 is provided with a plurality of first left-handed flow guiding grooves 202 at equal intervals, and the interval between two adjacent first left-handed flow guiding grooves 202 is greater than or equal to the widest interval of the cross section of the first left-handed flow guiding groove 202; the distance from the two ends of the first left-side diversion trench 202 to the two end surfaces of the left-handed long rib 201 is greater than or equal to the widest distance between the cross sections of the first left-side diversion trench 202.

Preferably, a second right side diversion trench 106 is arranged in the middle of the rear left-hand short rib 105, the opening length of the second right side diversion trench 106 is twice that of the first right side diversion trench 102, and the distances from the two ends of the second right side diversion trench 106 to the two ends of the rear left-hand short rib 105 are equal; the middle part of the front left-handed short rib 103 is provided with a third right-handed flow guiding groove 104, the opening length of the third right-handed flow guiding groove 104 is twice the opening length of the first right-handed flow guiding groove 102, and the distances from the two ends of the third right-handed flow guiding groove 104 to the two ends of the front left-handed short rib 103 are equal.

It should be noted that, since the left rotor element 2 and the right rotor element 1 are in mirror image distribution, a second left diversion trench 206 is provided in the middle of the rear right-hand short rib 205, the opening length of the second left diversion trench 206 is twice the opening length of the first left diversion trench 202, and the distances from the two ends of the second left diversion trench 206 to the two ends of the rear right-hand short rib 205 are equal; the middle part of the front right-handed short edge 203 is provided with a third left-handed flow guiding groove 204, the opening length of the third left-handed flow guiding groove 204 is twice the opening length of the first left-handed flow guiding groove 202, and the distances from the two ends of the third left-handed flow guiding groove 204 to the two ends of the front right-handed short edge 203 are equal.

Preferably, rounded corners are provided at the bottoms of the first right side guide groove 102, the second right side guide groove 106 and the third right side guide groove 104. Since the left rotor element 2 and the right rotor element 1 are mirror images, rounded corners are provided at the bottoms of the first left diversion trench 202, the second left diversion trench 206 and the third left diversion trench 204. Wherein, each guiding gutter bottom is equipped with the chamfer, is in order to prevent to appear the accumulation material phenomenon.

Preferably, the right rotor element 1 and the spindle, the left rotor element 2 and the spindle are all connected by involute splines. The involute internal spline through hole 3 can be machined in the center axial direction of the right rotor element 1 and the left rotor element 2, and then the involute internal spline through hole is matched with an involute external spline of a mandrel of the double-screw extruder.

Preferably, the first angle is 60 ° and the second angle is 36 °. Next, the use process of the present apparatus will be described by taking this as an example. Wherein "front" of the present application refers to the feed side and "rear" refers to the feed side.

After the materials enter the double-screw extruder, the materials on the left side and the right side are respectively contacted with the rear left-hand short rib 105 and the rear right-hand short rib 205 firstly through other conveying thread elements to the position of the nine-edge meshing rotor elements, and as the right rotor element 1 and the left rotor element 2 are in different-direction meshing transmission, when the right rotor element 1 rotates anticlockwise, the left rotor element 2 rotates clockwise, and the rear left-hand short rib 105 and the rear right-hand short rib 205 are in reverse spiral structures, so that after the materials on the left side and the right side are directly contacted with the rear left-hand short rib 105 and the rear right-hand short rib 205, the materials can be pushed backwards under the reverse spiral action;

The material continuously moves forward due to the pole climbing effect and the trend of the material pushed by the subsequently added material, the material alternately flows forward and backward, the material which is not in direct contact with the rear left-hand short rib 105 and the rear right-hand short rib 205 gradually moves forward from the middle of the spiral groove under the pushing of the subsequently added material, the material which is passively and forward flowing at two sides is split when passing through the second right-hand diversion trench 106 and the second left-hand diversion trench 206 respectively, and a small amount of material reaches the back of the rear left-hand short rib 105 and the rear right-hand short rib 205 through the second right-hand diversion trench 106 and the second left-hand diversion trench 206 respectively and reaches the right-hand long rib 101 and the left-hand long rib 201;

Meanwhile, the materials which do not pass through the second right-side diversion trench 106 and the second left-side diversion trench 206 gradually move forward under the pushing of the materials which are added subsequently until reaching the positions of the right-hand long edge 101 and the left-hand long edge 201; the right-hand long rib 101 and the left-hand long rib 201 are forward spirals, so that forward thrust along the rib spiral line direction can be generated on contact materials, a small amount of materials are split by the first right-hand diversion trench 102 and the first left-hand diversion trench 202 in the forward movement process of the materials, part of the materials flow backwards, and the other right-hand long rib 101 and the left-hand long rib 201 are mixed with other materials through spiral grooves;

The materials which do not pass through the first right side diversion trench 102 and the first left side diversion trench 202 continue to move forwards, and after reaching the front left-hand short edge 103 and the front right-hand short edge 203, the materials are subjected to the reverse spiral thrust action of the front left-hand short edge 103 and the front right-hand short edge 203, and flow back and forth alternately to be continuously remixed;

As the material to be added is continuously increased, the material pushed back by the front left-hand short edge 103 and the front right-hand short edge 203 is forced to move forward, and is split when passing through the third right-hand diversion trench 104 and the third left-hand diversion trench 204, the material part passing through the third right-hand diversion trench 104 and the third left-hand diversion trench 204 flows backwards to the positions of the right-hand long edge 101 and the left-hand long edge 201 to be mixed with other materials, and the material continues to move forward under the forward pushing of the right-hand long edge 101 and the left-hand long edge 201 until the subsequent material fills up the spiral groove, and the front material is pushed to the next nine-edge meshing rotor element;

Because the left rotor element 2 and the right rotor element 1 are meshed with each other and rotate, materials in the meshed areas of the left rotor element 2 and the right rotor element 1 are continuously extruded under the interaction of a plurality of edges, and because the meshing space is continuously changed, the force applied to the materials is also continuously changed, the flow rate of the materials in the meshed areas is also suddenly changed due to the change of stress, the speed suddenly changed can strengthen the dispersion condition of different materials, so that the distribution of the materials is more uniform, and meanwhile, the shearing generated by the suddenly changed speed of the materials can break the aggregation of the materials, so that the powder in the finally produced finished product is finer.

The reverse spiral arranged by the device can effectively increase the retention time of materials, and the short reverse spiral edge avoids overlarge local pressure caused by incapability of forward flowing of the materials; in addition, the forward and reverse spiral edges of the device are staggered, so that the shearing of materials can be increased, different materials are dispersed more uniformly, and the forward and reverse spiral edges are staggered, rather than being staggered, so that the structure is more compact, and the redundancy is reduced; in addition, the diversion trenches are arranged on the forward and reverse spiral edges, so that more branches are provided for the flow of materials, and the materials are more uniformly mixed. By using the device, the purposes of long material residence time, multiple material shearing times, good material dispersing effect, redundant structure reduction and the like can be achieved.

In addition to the nine-edge engaging rotor element of the twin-screw extruder, the present utility model also provides an extruder including the nine-edge engaging rotor element of the twin-screw extruder disclosed in the above embodiments, and the structure of each other portion of the extruder is referred to in the prior art, and will not be described herein.

It should be noted that, in the present disclosure, the first right side diversion trench 102, the second right side diversion trench 106, the third right side diversion trench 104, the first left side diversion trench 202, the second left side diversion trench 206, the third left side diversion trench 204, the first photographing hole 111, the second photographing hole 131, the first angle and the second angle are just for distinguishing the difference of the positions, and no distinction of the order is made.

It should be noted that the positional relationship indicated by "left and right", "front and rear", etc. of the present utility model is based on the positional relationship shown in the drawings, and is merely for simplicity of description and understanding, and is not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. Any combination of all the embodiments provided in the present utility model is within the protection scope of the present utility model, and will not be described herein.

The present utility model provides an extruder and a twin screw extruder having a nine-sided intermeshing rotor element as described in detail above. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (10)

1. A nine-sided intermeshing rotor element for a twin screw extruder, comprising:

The right-side rotor element (1) comprises three right-hand long ribs (101) uniformly distributed along the outer periphery of the middle end of the right-side rotor element (1), three front left-hand short ribs (103) uniformly distributed along the outer periphery of the front end of the right-side rotor element (1), and three rear left-hand short ribs (105) uniformly distributed along the outer periphery of the rear end of the right-side rotor element (1); each right-hand long edge (101) is right-hand at a first angle relative to the central axis of the right-side rotor element (1), each front left-hand short edge (103) is left-hand at a second angle relative to the central axis of the right-side rotor element (1), each rear left-hand short edge (105) is left-hand at the second angle relative to the central axis of the right-side rotor element (1), and the right-hand long edges (101), the front left-hand short edges (103) and the rear left-hand short edges (105) are provided with diversion trenches;

A left rotor element (2) which is a mirror image of the right rotor element (1);

The central shaft holes of the right rotor element (1) and the left rotor element (2) are respectively internally provided with a central shaft, so that the right rotor element (1) and the left rotor element (2) are driven to be meshed and rotated in opposite directions.

2. The nine-rib meshed rotor element of a twin-screw extruder according to claim 1, characterized in that the front left-hand short rib (103) and the rear left-hand short rib (105) are of the same length and are provided with the same number of said channels;

The length ratio of the right-hand long edge (101) to the front left-hand short edge (103) is n, and the ratio of the number of the diversion trenches on the right-hand long edge (101) to the number of the diversion trenches on the front left-hand short edge (103) is n.

3. The nine-rib meshed rotor element of a twin-screw extruder according to claim 1, characterized in that the rib bottom width of the right-hand long rib (101), the front left-hand short rib (103) and the rear left-hand short rib (105) is less than or equal to 1/12 of the circumference of the rib bottom circle of the right-hand rotor element (1);

The right-hand long rib (101), the front left-hand short rib (103) and the rear left-hand short rib (105) each have a rib top width of less than or equal to 1/30 of the circumference of the rib top circle of the right-hand rotor element (1).

4. A nine-rib meshed rotor element of a twin-screw extruder according to claim 3, characterized in that the cross-sections of the channels on the right-hand long rib (101), the front left-hand short rib (103) and the rear left-hand short rib (105) are all isosceles trapezoids, the depth of the channels being 1/3 to 1/2 of the height of the corresponding rib.

5. The nine-edge meshing rotor element of a twin-screw extruder according to claim 4, characterized in that a plurality of first right-side guide grooves (102) are provided on the right-hand long edge (101) at equal intervals, and the interval between two adjacent first right-side guide grooves (102) is greater than or equal to the cross-section widest interval of the first right-side guide grooves (102);

The distance from the two ends of the first right side diversion trench (102) to the two end faces of the right-hand long edge (101) is larger than or equal to the widest distance between the cross sections of the first right side diversion trench (102).

6. The nine-edge meshing rotor element of a twin-screw extruder according to claim 5, characterized in that the middle part of the back left-hand short edge (105) is provided with a second right-hand diversion trench (106), the opening length of the second right-hand diversion trench (106) is twice the opening length of the first right-hand diversion trench (102), and the distances from the two ends of the second right-hand diversion trench (106) to the two ends of the back left-hand short edge (105) are equal;

The middle part of preceding left-handed short arris (103) is equipped with a third right side guiding gutter (104), the opening length of third right side guiding gutter (104) is the opening length of first right side guiding gutter (102), the distance of the both ends of third right side guiding gutter (104) to the both ends of preceding left-handed short arris (103) equals.

7. The nine-rib intermeshing rotor element of a twin screw extruder according to claim 6, characterized in that the bottoms of the first right side channel (102), the second right side channel (106) and the third right side channel (104) are provided with rounded corners.

8. Nine-edge engaging rotor element of a twin-screw extruder according to any of claims 1 to 7, characterized in that the right rotor element (1) and the spindle, the left rotor element (2) and the spindle are all connected by involute splines.

9. The nine-rib-engaging rotor element of a twin-screw extruder of any one of claims 1 to 7, wherein the first angle is 60 ° and the second angle is 36 °.

10. An extruder comprising the nine-rib intermeshing rotor element of the twin-screw extruder of any one of claims 1-9.