阅读说明：本技术 一种单螺杆喂料结构及行星螺杆挤出机 (Single screw rod feed structure and planet screw extruder ) 是由 刘强 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种单螺杆喂料结构及行星螺杆挤出机,本发明的单螺杆喂料结构工作时,送料段向前送料,进入混炼段后,正向螺楞段产生向前泵送的作用,反向螺楞段产生与正向螺楞段相反的泵送作用,正向螺楞段和反向螺楞段形成的正反向推力可对物料起到了剪切、撕拉、捏搓、挤压的作用,从而实现了物料的分散混合和塑化。将单螺杆喂料结构与送料结构或行星结构连接时,可以实现对物料的预塑化,经过预塑化的物料在进入行星螺杆挤出机后,可以很大程度地减小物料对行星螺杆挤出机送料结构或行星结构的磨损。(The invention discloses a single-screw feeding structure and a planetary screw extruder, wherein when the single-screw feeding structure works, a feeding section feeds forward, after the single-screw feeding structure enters a mixing section, a forward screw corrugation section generates a forward pumping effect, a reverse screw corrugation section generates a pumping effect opposite to that of the forward screw corrugation section, and forward and reverse thrust formed by the forward screw corrugation section and the reverse screw corrugation section can play roles in shearing, tearing, pulling, kneading and extruding materials, so that the dispersive mixing and plasticizing of the materials are realized. When the single-screw feeding structure is connected with the feeding structure or the planetary structure, preplasticizing of materials can be realized, and after the preplasticized materials enter the planetary screw extruder, abrasion of the materials on the feeding structure or the planetary structure of the planetary screw extruder can be reduced to a great extent.)

1. A single screw rod feed structure which characterized in that: the feeding device comprises a feeding screw rod and a screw sleeve sleeved on the outer side of the feeding screw rod, wherein the rear end of the feeding screw rod is connected with a first power mechanism, a feeding section, a forward screw ridge section and a reverse screw ridge section are sequentially arranged on the feeding screw rod from back to front, the screw thread directions of the feeding section and the forward screw ridge section are the same, the screw thread directions of the forward screw ridge section and the reverse screw ridge section are opposite, the forward screw ridge section and the reverse screw ridge section are mixing sections, and a feeding port is formed in the position, corresponding to the feeding section, on the screw sleeve.

2. The single screw feeding structure of claim 1, wherein: the oil-feeding structure is characterized in that a spiral oil groove is formed in the screw sleeve in the axial direction of the screw sleeve, an oil inlet hole and an oil outlet hole are formed in the screw sleeve, the oil inlet hole and the oil outlet hole are communicated with the oil groove, and high-temperature oil is introduced into the oil groove through the oil inlet hole.

3. The single screw feeding structure of claim 1, wherein: spiral heating wires are wound in the threaded sleeve around the axial direction of the threaded sleeve and are electrically connected with an external power supply.

4. The single screw feeding structure of claim 1, wherein: the feeding screw is provided with a hot oil channel along the axial direction of the feeding screw, the hot oil channel comprises an oil inlet flow channel and an oil return flow channel which are arranged in parallel, and the oil inlet flow channel and the oil return flow channel are communicated at the front end of the feeding screw.

5. The single screw feeding structure of claim 1, wherein: the first power mechanism comprises a motor and a speed reducer, the output end of the motor is in transmission connection with the input end of the speed reducer, and the output end of the speed reducer is fixedly connected with the rear end of the feeding screw rod through a key; and an outlet flange is arranged at the front end of the threaded sleeve.

6. The single screw feeding structure of claim 1, wherein: the cross sections of the forward spiral corrugation section and the reverse spiral corrugation section are in shapes formed by sequentially connecting a first straight line section, a first curve section, a second straight line section and a second curve section, the first straight line section is opposite to the second straight line section, and the first curve section is opposite to the second curve section.

7. A planetary screw extruder is characterized in that: the single-screw feeding structure comprises a second power mechanism, a feeding structure and a plurality of planetary structures which are sequentially connected, wherein the front end of the screw sleeve is connected with the first feeding port on the feeding structure or any planetary structure.

8. The planetary screw extruder of claim 7, wherein: the feeding structure comprises a feeding screw and a feeding barrel, the feeding barrel is arranged on the outer side of the feeding screw in a sleeved mode, the planetary structure comprises a main screw, a plurality of planetary screws meshed with the main screw and a planetary barrel, the main screw and the planetary barrel are arranged on the outer side of the planetary screws in a sleeved mode, a first feeding opening is formed in the feeding barrel or the planetary barrel, the main screw is in transmission connection with the feeding screw, the main screw is adjacent to the planetary structure, the main screw is in transmission connection, and the planetary structure on the outermost side is provided with a discharging opening at one end of the planetary barrel.

9. The planetary screw extruder of claim 8, wherein: the feeding barrel is connected with the planetary barrels and the planetary barrels are connected through flanges, the inner sides of the joints of two adjacent flanges are provided with spacing rings, and the spacing rings are provided with liquid injection ports.

10. The planetary screw extruder of claim 8, wherein: and the feeding barrel is also provided with a second feeding port.

Technical Field

The invention relates to the technical field of plastic extrusion equipment, in particular to a single-screw feeding structure and a planetary screw extruder.

Background

When the planetary extruder is used for producing high-calcium high-filling materials and rubber products, the screw rod is easy to wear, and the service life is short. The existing feeding mechanism of the planetary machine consists of a feeding screw and an outer sleeve, only has the feeding function, and can not plasticize and mix materials, the materials enter a mixing section of the planetary machine to be plasticized, dry friction is inevitably generated, and when the plastics are not heated enough and melt uniformly, the abrasion of the inner wall of a charging barrel and the surface of the screw is easily increased.

Disclosure of Invention

The invention aims to provide a single-screw feeding structure and a planetary screw extruder, which are used for solving the problems in the prior art, so that materials are plasticized before entering a mixing section of the planetary screw extruder, dry friction is avoided, and the abrasion of the inner wall of a charging barrel and the surface of a screw is reduced.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a single-screw feeding structure which comprises a feeding screw and a screw sleeve sleeved on the outer side of the feeding screw, wherein the rear end of the feeding screw is connected with a first power mechanism, a feeding section, a forward screw corrugation section and a reverse screw corrugation section are sequentially arranged on the feeding screw from back to front, the screw thread directions of the feeding section and the forward screw corrugation section are the same, the screw thread directions of the forward screw corrugation section and the reverse screw corrugation section are opposite, the forward screw corrugation section and the reverse screw corrugation section are mixing sections, and a feeding port is formed in the position, corresponding to the feeding section, on the screw sleeve.

Preferably, a spiral oil groove is formed in the screw sleeve in the axial direction of the screw sleeve, an oil inlet hole and an oil outlet hole are formed in the screw sleeve, the oil inlet hole and the oil outlet hole are communicated with the oil groove, and high-temperature oil is introduced into the oil groove through the oil inlet hole.

Preferably, a spiral heating wire is wound in the screw sleeve around the axial direction of the screw sleeve, and the heating wire is electrically connected with an external power supply.

Preferably, a hot oil passage is arranged in the feeding screw rod along the axial direction of the feeding screw rod, the hot oil passage comprises an oil inlet flow passage and an oil return flow passage which are arranged in parallel, and the oil inlet flow passage and the oil return flow passage are communicated at the front end of the feeding screw rod.

Preferably, the first power mechanism comprises a motor and a speed reducer, the output end of the motor is in transmission connection with the input end of the speed reducer, and the output end of the speed reducer is fixedly connected with the rear end of the feeding screw rod through a key; and an outlet flange is arranged at the front end of the threaded sleeve.

Preferably, the cross-section of the forward corrugated section and the cross-section of the reverse corrugated section are in a shape formed by sequentially connecting a first straight line section, a first curve section, a second straight line section and a second curve section, the first straight line section is opposite to the second straight line section, and the first curve section is opposite to the second curve section.

The invention also provides a planetary screw extruder which comprises the single-screw feeding structure, and further comprises a second power mechanism, a feeding structure and a plurality of planetary structures which are sequentially connected, wherein the front end of the screw sleeve is connected with the feeding structure or a first feeding port on any one of the planetary structures.

Preferably, the feeding structure comprises a feeding screw and a feeding barrel sleeved outside the feeding screw, the planetary structure comprises a main screw, a plurality of planetary screws meshed with the main screw and a planetary barrel sleeved outside the main screw and the planetary barrel, the first feeding port is arranged on the feeding barrel or the planetary barrel, the main screw is in transmission connection with the feeding screw, the main screw is adjacent to the planetary structure, the main screw is in transmission connection, and the outermost side of the planetary structure is provided with a discharging port at one end of the planetary barrel.

Preferably, the feeding barrel is connected with the planetary barrels and the planetary barrels are connected with each other through flanges, the inner sides of the joints of two adjacent flanges are provided with spacing rings, and the spacing rings are provided with liquid injection ports.

Preferably, the feeding barrel is further provided with a second feeding port.

Compared with the prior art, the invention has the following technical effects:

when the single-screw feeding structure works, the feeding section feeds forward, after the feeding section enters the mixing section, the forward spiral corrugation section generates a forward pumping effect, the reverse spiral corrugation section generates a pumping effect opposite to that of the forward spiral corrugation section, and forward and reverse thrust formed by the forward spiral corrugation section and the reverse spiral corrugation section can play roles in shearing, tearing, kneading and extruding materials, so that the dispersed mixing and plasticization of the materials are realized. When the single-screw feeding structure is connected with the feeding structure or the planetary structure, preplasticizing of materials can be realized, and after the preplasticized materials enter the planetary screw extruder, abrasion of the materials on the feeding structure or the planetary structure of the planetary screw extruder can be reduced to a great extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a front view of a single screw feed arrangement of the present invention;

FIG. 2 is a top view of a single screw feed configuration of the present invention;

FIG. 3 is a schematic view of a feed screw of the present invention;

FIG. 4 is a schematic cross-sectional view of a forward and reverse corrugated section of the present invention;

FIG. 5 is a top view of the planetary screw extruder of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5;

wherein: 1-feeding screw, 2-thread sleeve, 3-feeding section, 4-forward spiral corrugation section, 5-reverse spiral corrugation section, 6-feeding port, 7-oil groove, 8-oil inlet hole, 9-motor, 10-speed reducer, 11-outlet flange, 12-feeding structure, 13-planetary structure, 14-first feeding port, 15-discharging port, 16-spacer ring, 17-oil outlet hole, 18-single screw feeding structure, 19-liquid injection port and 20-second feeding port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

The invention aims to provide a single-screw feeding structure and a planetary screw extruder, which are used for solving the problems in the prior art, so that materials are plasticized before entering a mixing section of the planetary extruder, dry friction is avoided, and the abrasion of the inner wall of a charging barrel and the surface of a screw is reduced.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.