Biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing method and device

• US 10,632,656 B2
• Filed: 12/13/2016
• Issued: 04/28/2020
• Est. Priority Date: 03/16/2016
• Status: Active Grant

• Current Assignee: Guangzhou Huaxinke Intelligent Manufacturing Technology Co., Ltd., South China University of Technology
• Original Assignee: South China University of Technology
• Inventors: Qu, Jinping, Yang, Zhitao, Feng, Yanhong, Yin, Xiaochun
• Primary Examiner(s): Sorkin, David L
• Application Number:
  US15/743,795
• Publication Number:
  US 20180200937A1
• Time in Patent Office: 1,232 Days
• Field of Search: 366 82, 366 85
• CPC Class Codes: B29B 7/428 Parts or accessories, e.g. casings, feeding or discharging means
• CPC Class Codes: B29B 7/482 provided with screw parts in addition to other mixing parts, e.g. paddles, gears, discs
• CPC Class Codes: B29B 7/485 with three or more shafts provided with screws
• CPC Class Codes: B29B 7/488 Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices discharging B29B7/582; feeding B29B7/60
• CPC Class Codes: B29B 7/489 Screws B29B7/482 takes precedence
• CPC Class Codes: B29B 7/845 Venting, degassing or removing evaporated components in devices with rotary stirrers
• CPC Class Codes: B29C 37/005 Compensating volume or shape change during moulding, in general
• CPC Class Codes: B29C 45/54 and plasticising screw B29C45/532 takes precedence
• CPC Class Codes: B29C 45/544 the plasticising unit being connected to a transfer chamber in the injection unit at the upstream side of the injection piston
• CPC Class Codes: B29C 45/60 Screws
• CPC Class Codes: B29C 45/62 Barrels or cylinders
• CPC Class Codes: B29C 48/2513 in the plasticising zone
• CPC Class Codes: B29C 48/375 Plasticisers, homogenisers or feeders comprising two or more stages
• CPC Class Codes: B29C 48/402 the screws having intermeshing parts
• CPC Class Codes: B29C 48/425 using three or more screws serially arranged screws B29C48/38, B29C48/385
• CPC Class Codes: B29C 48/767 through a degassing opening of a barrel
• CPC Class Codes: B29C 48/92 Measuring, controlling or regulating

Abstract

The present invention discloses a biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing method and device. The method is characterized in that: the conveying volume of materials formed between two or three engaged eccentric rotors, which are formed by spiral structures and eccentric cylindrical structures connected alternately, and an inner surface of a stator changes periodically along the axial direction and the radial direction of the rotors, achieving the volume pulsed deformation plasticizing and conveying of the materials during engaged rotation of the two or three engaged eccentric rotors. The device'"'"'s eccentric rotors are all formed by length-varying spiral structures and eccentric cylindrical structures connected alternately; the spiral structures of the eccentric rotors are engaged to each other; the axial positions of eccentric cylindrical structures of the two or three rotors are the same. The present invention can implement extrusion of polymer materials or implement, in combination with a plunger injection unit, injection molding of polymer materials, and have many features such as desirable mixing and plasticizing effects for materials, a short thermo-mechanical course, low power consumption, and wide adaptability.

Claims

1. A biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing device comprising a hopper, two or three eccentric rotors, a stator and a drive unit, the eccentric rotors being disposed in an inner cavity of the stator and connected with the drive unit, respectively;

the hopper is in communication with the inner cavity of the stator, and the eccentric rotors are all formed by length-varying spiral structures and eccentric cylindrical structures connected alternately;

the spiral structures of the eccentric rotors are engaged to each other; and

the axial positions of the eccentric cylindrical structures of the two or three rotors are the same;

wherein the device is configured to perform a biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing method, the method comprising the steps of;

conveying a volume of materials formed between two or three engaged eccentric rotors formed by spiral structures and eccentric cylindrical structures connected alternately, and an inner surface of the stator, the volume changes periodically along an axial direction and a radial direction of the rotors, thereby achieving the volume pulsed deformation plasticizing and conveying of the materials during engaged rotation of the two or three engaged eccentric rotors;

wherein both a pitch of the spiral structure of the eccentric rotor and the length of the eccentric cylinder are gradually decreased in the axial direction.

2. The biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing device according to claim 1, wherein an axis of the spiral portion of the two or three rotors is the same as the rotation axis of the rotor, and the axis of the eccentric cylinder is eccentric with respect to the rotation axis of the rotor, with the eccentric cylinder in different positions on the same rotor having the same eccentric direction.

3. The biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing device according to claim 1, wherein the three eccentric rotors comprise, a middle eccentric rotor, a right eccentric rotor and a left eccentric rotor, respectively;

the middle eccentric rotor, the right eccentric rotor and the left eccentric rotor are arranged in a horizontal arrangement in the inner cavity of the stator; and

the spiral structure of the middle eccentric rotor and the spiral structures of the right eccentric rotor and the left eccentric rotor are engaged to each other.

4. The biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing device according to claim 1, wherein there are two eccentric rotors, which are a first eccentric rotor and a second eccentric rotor, respectively, both engaged in a same or different direction in the inner cavity of the stator.

5. The biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing device according to claim 1, wherein the device is mainly composed of a tri-axial eccentric rotor volume pulsed deformation plasticizing and conveying unit and a plunger injection unit, the tri-axial eccentric rotor volume pulsed deformation plasticizing and conveying unit is mainly composed of the hopper, a middle eccentric rotor, a right eccentric rotor, a left eccentric rotor, the stator and a drive unit;

the plunger injection unit is mainly composed of a connector, a plunger and a cylinder;

the cylinder is connected with the stator through the connector, and the plunger is connected with the cylinder;

the middle eccentric rotor, the right eccentric rotor and the left eccentric rotor, respectively connected with the drive unit, are all placed in the inner cavity of the stator;

both the pitch of the spiral structure and the length of the eccentric cylinder decrease along the axial direction; and

the spiral structure of the middle eccentric rotor and the spiral structures of the right eccentric rotor and the left eccentric rotor are engaged to each other.

6. The biaxial or tri-axial eccentric rotor volume pulsed deformation plasticizing device according to claim 1, wherein both a pitch of the spiral structure of the eccentric rotor and the length of the eccentric cylinder are gradually decreased in the axial direction.