CN213860629U

CN213860629U - Special double-screw structure for nylon material

Info

Publication number: CN213860629U
Application number: CN202022509094.9U
Authority: CN
Inventors: 余维勉
Original assignee: Ningde Huahao Nyion Co ltd
Current assignee: Ningde Huahao Nyion Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-08-03
Anticipated expiration: 2030-11-03

Abstract

The utility model provides a special twin-screw structure of nylon material, two relative complex screw rods, the screw rod includes the dabber, the dabber has set gradually along material direction of delivery and is used for the screw thread section of carrying and the meshing section that is used for shearing the material, still includes the heating mixing section, the heating mixing section sets up after the meshing section, the screw thread of heating mixing section has the screw thread that the interval central angle is 180 in a plurality of axial, the starting point of screw thread and the terminal point of adjacent screw thread are at the axial collineation; the heating and mixing section also comprises a heating rod, the heating rod is arranged at the non-meshing position of the screw, one end of the heating rod radially extends into the threaded space along the mandrel, and the other end of the heating rod is fixed with the outer machine body; the heating rod is provided with the elastic component along the dabber axial, elastic component one end is fixed on the heating rod, and one end supports and leans on adjacent screw thread. The setting of heating rod and the flexible change of elastic component have realized that rapid heating guarantees the temperature and high-efficient ground homogeneous mixing material.

Description

Special double-screw structure for nylon material

Technical Field

The utility model relates to a double-screw field especially relates to a special double-screw structure of nylon material.

Background

The processing of nylon materials requires the continuous maintenance of high temperatures to prevent solidification. In the prior art, a double-screw extrusion structure is relatively common, but when the double-screw extrusion structure is used, a machine can be operated only when the machine reaches a certain temperature; the materials can not be uniformly mixed in the mixing treatment process of the materials, and the quality of subsequent forming can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provides a special double-screw structure for nylon materials, which can heat quickly and stir the mixture efficiently and uniformly.

In order to solve the technical problem, the utility model discloses a technical scheme be: a special double-screw structure for nylon materials comprises two screws which are matched oppositely, wherein each screw comprises a mandrel, the mandrel is sequentially provided with a screw thread section for conveying and an engagement section for shearing materials along the material conveying direction, the special double-screw structure further comprises a heating and mixing section, the heating and mixing section is arranged behind the engagement section, the screw thread of the heating and mixing section is a plurality of screw threads with the central angles of 180 degrees at intervals in the axial direction, and the starting point of each screw thread is collinear with the end point of the adjacent screw thread in the axial direction; the heating and mixing section also comprises a heating rod, the heating rod is arranged at the non-meshing position of the screw, one end of the heating rod radially extends into the threaded space along the mandrel, and the other end of the heating rod is fixed with the outer machine body; the heating rod is provided with the elastic component along the dabber axial, elastic component one end is fixed on the heating rod, and one end supports and leans on adjacent screw thread.

Further, the elastic pieces are respectively arranged on two sides of the heating rod along the axial direction of the mandrel, and the other ends of the elastic pieces abut against the adjacent threads.

Further, the heating pipe is sleeved in the hollow core shaft.

Furthermore, the meshing section is a plurality of convex concentric discs on the circumference of the mandrel, and a plurality of axial through grooves are arranged on the circumference of each disc and are staggered with the axial through grooves of the adjacent discs.

The beneficial effects of the utility model reside in that: after materials are transported through the thread section, the materials enter the meshing section to be ground and extruded into a molten state, and when the materials enter the heating and mixing section, the heating rod is in contact with the molten materials, so that the temperature of the materials is increased, and the materials are prevented from being solidified again due to overlong screw rods; and meanwhile, the fluidity of the material is improved by heating. In the rotation process of the screw, the axial length of the thread on the opposite side of the heating rod is firstly reduced and then increased, and then is reduced, so that the axial elastic part arranged at the extending end of the heating rod is stretched and contracted in a reciprocating manner, the stretching and contraction of the elastic part stirs and heats materials in the mixing section, and the mixing degree is further improved; when the heating rod is positioned at the opposite position of the starting point of the thread and the end point of the adjacent thread, the elastic piece is compressed to the shortest state; the screw rod rotates, the heating rod leaves the opposite position, the elastic force of the elastic piece is released, a large axial force is generated, the materials are further stirred, and the materials are fully mixed.

Meanwhile, the elastic piece is in contact with the heating rod for heat conduction, and the elastic piece is in full contact with the material in the reciprocating stretching process, so that the temperature of the material is further increased.

Drawings

Fig. 1 is a schematic structural view of a special double-screw structure for nylon materials in an embodiment of the present invention;

fig. 2 is a schematic view illustrating the change of the elastic member when the heating and mixing section of the first embodiment of the present invention rotates;

FIG. 3 is a cross-sectional view of FIG. 2A-A;

fig. 4 is a schematic cross-sectional view of a disc at an engagement section according to a first embodiment of the present invention.

Description of reference numerals:

1. a mandrel; 2. a threaded segment; 3. an engaging section; 4. a heating and mixing section; 5. a heating rod; 6. an elastic member; 7. heating the tube.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 4, a special double-screw structure for nylon materials comprises two screws which are matched with each other, wherein each screw comprises a mandrel, the mandrel is sequentially provided with a thread section for conveying and an engagement section for shearing materials along a material conveying direction, the special double-screw structure further comprises a heating and mixing section, the heating and mixing section is arranged behind the engagement section, threads of the heating and mixing section are a plurality of threads with central angles of 180 degrees which are axially spaced, and starting points of the threads and end points of adjacent threads are collinear in the axial direction; the heating and mixing section also comprises a heating rod, the heating rod is arranged at the non-meshing position of the screw, one end of the heating rod radially extends into the threaded space along the mandrel, and the other end of the heating rod is fixed with the outer machine body; the heating rod is provided with the elastic component along the dabber axial, elastic component one end is fixed on the heating rod, and one end supports and leans on adjacent screw thread.

From the above description, the beneficial effects of the present invention are: after materials are transported through the thread section, the materials enter the meshing section to be ground and extruded into a molten state, and when the materials enter the heating and mixing section, the heating rod is in contact with the molten materials, so that the temperature of the materials is increased, and the materials are prevented from being solidified again due to overlong screw rods; and meanwhile, the fluidity of the material is improved by heating. In the rotation process of the screw, the axial length of the thread on the opposite side of the heating rod is firstly reduced and then increased, and then is reduced, so that the axial elastic part arranged at the extending end of the heating rod is stretched and contracted in a reciprocating manner, the stretching and contraction of the elastic part stirs and heats materials in the mixing section, and the mixing degree is further improved; when the heating rod is positioned at the opposite position of the starting point of the thread and the end point of the adjacent thread, the elastic piece is compressed to the shortest state; the screw rod rotates, the heating rod leaves the opposite position, the elastic force of the elastic piece is released, a large axial force is generated, the materials are further stirred, and the materials are fully mixed. Meanwhile, the elastic piece is in contact with the heating rod for heat conduction, and the elastic piece is in full contact with the material in the reciprocating stretching process, so that the temperature of the material is further increased.

As can be known from the above description, the elastic piece is respectively arranged on two sides of the heating rod along the axial direction of the mandrel, and the other end of the elastic piece is abutted against the adjacent threads, so that the stirring range of the spring is larger, and the heat conduction effect is better.

Further, the heating pipe is sleeved in the hollow core shaft.

As can be seen from the above description, the heating pipe can be arranged to quickly preheat the screw rod, and the temperature of the material can be ensured in the operation process, so that solidification is prevented.

As can be seen from the above description, the concentric disks of the twin-screw are meshed with each other to knead the materials, and the axial through grooves arranged axially of the disks enable parts of the materials to pass through smaller through grooves in the kneading process to be further extruded, so that the mixing degree of the materials is improved; the axial through grooves of the adjacent disks are arranged in a staggered mode, so that the passing time of partial materials is prolonged, the time of the materials in the meshing section is prolonged, and the mixing degree of the materials is improved.

Referring to fig. 1 to 4, a first embodiment of the present invention is:

the special double screw structure of nylon material of this embodiment, including two relative complex screws, the screw rod includes dabber 1, and the dabber has set gradually along material direction of delivery and has been used for carrying the screw thread section 2, the meshing section 3 and the heating of shearing the material and mix the section 4, and the screw thread that the heating mixes the section is 180 screw threads for a plurality of axially spaced central angles, and the starting point of screw thread is collinear in the axial direction with the terminal point of adjacent screw thread.

The heating and mixing section also comprises a heating rod 5, the heating rod 5 is arranged at the non-meshing position of the screw, one end of the heating rod 5 radially extends into the threaded space along the mandrel 1, and the other end of the heating rod is fixed with the outer machine body; the heating rod 5 is respectively provided with elastic parts 6 along the axial both sides of dabber, and 6 one end of elastic part are fixed on the heating rod, and one end is supported and is leaned on adjacent screw thread.

The hollow sleeve of dabber 1 is equipped with heating pipe 7, and the setting of heating pipe 7 can also guarantee the temperature of material at the operation in-process to the screw rod fast preheating, prevents to solidify.

The meshing section 3 is a plurality of convex concentric discs on the circumference of the mandrel 1, a plurality of axial through grooves are arranged on the circumference of each disc and are mutually staggered with the circumferential through grooves of the adjacent discs, so that part of materials can pass through smaller through grooves in the kneading process, the materials are further extruded, and the mixing degree of the materials is improved; the axial through grooves of the adjacent disks are arranged in a staggered mode, so that the passing time of partial materials is prolonged, the time of the materials in the meshing section is prolonged, and the mixing degree of the materials is improved.

To sum up, the utility model provides a special double-screw structure of nylon material, through entering the meshing section after screw thread section transportation material and carrying out the crushing extrusion of material and be taken the melt form, when the material gets into the heating and mixing section, the heating rod contacts the melt form material, improves the material temperature, guarantees that the material can not solidify once more because the screw rod is overlength; and meanwhile, the fluidity of the material is improved by heating. In the rotation process of the screw, the axial length of the thread on the opposite side of the heating rod is firstly reduced and then increased, and then is reduced, so that the axial elastic part arranged at the extending end of the heating rod is stretched and contracted in a reciprocating manner, the stretching and contraction of the elastic part stirs and heats materials in the mixing section, and the mixing degree is further improved; when the heating rod is positioned at the opposite position of the starting point of the thread and the end point of the adjacent thread, the elastic piece is compressed to the shortest state; the screw rod rotates, the heating rod leaves the opposite position, the elastic force of the elastic piece is released, a large axial force is generated, the materials are further stirred, and the materials are fully mixed. Meanwhile, the elastic part is in contact with the heating rod for heat conduction, and the elastic part is fully contacted with the material in the reciprocating expansion process, so that the temperature of the material is further increased; the elastic pieces are arranged on the two sides of the heating rod, so that the stirring range is larger, and the heat conduction effect is better; the heating pipe is sleeved in the hollow core shaft, so that the temperature of the material is further ensured; the disc and the axial that mesh the section lead to the groove and further extrude the material, improve the mixed degree of material, the time that the extension material was mixed.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. A special double-screw structure for nylon materials comprises two screws which are matched oppositely, wherein each screw comprises a mandrel, the mandrels are sequentially provided with a screw thread section for conveying and an engagement section for shearing materials along the material conveying direction, the special double-screw structure is characterized by further comprising a heating and mixing section, the heating and mixing section is arranged behind the engagement section, the threads of the heating and mixing section are a plurality of threads which are axially provided with spaced central angles of 180 degrees, and the starting points of the threads and the end points of adjacent threads are collinear in the axial direction; the heating and mixing section also comprises a heating rod, the heating rod is arranged at the non-meshing position of the screw, one end of the heating rod radially extends into the threaded space along the mandrel, and the other end of the heating rod is fixed with the outer machine body; the heating rod is provided with the elastic component along the dabber axial, elastic component one end is fixed on the heating rod, and one end supports and leans on adjacent screw thread.

2. The special twin-screw structure of nylon material of claim 1, wherein the elastic pieces are respectively arranged on both sides of the heating rod along the axial direction of the mandrel.

3. The special twin-screw structure for nylon materials as claimed in claim 1, wherein the mandrel is sleeved with a heating tube.

4. The special twin-screw structure for nylon material as claimed in claim 1, wherein the meshing section is a plurality of concentric discs protruding from the circumference of the mandrel, and a plurality of axial through grooves are arranged on the circumference of the discs and are staggered with the axial through grooves of the adjacent discs.