Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Flow equalizing method and device for rotor driven by melt extrusion pressure and provided with internal and external screw flights

A technology of melt extrusion and helicoidal rotors, which is applied in household appliances, other household appliances, applications, etc., can solve the problems of uneven flow and distribution of polymer melts, achieve wide application range, reduce energy consumption, and be easy to manufacture Effect

Inactive Publication Date: 2015-11-25
SOUTH CHINA UNIV OF TECH +1
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a melt extrusion pressure-driven flow equalization method with inner and outer helical rotors, which can effectively solve the problem of uneven flow distribution of polymer melt in the die head , without additional drive

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flow equalizing method and device for rotor driven by melt extrusion pressure and provided with internal and external screw flights
  • Flow equalizing method and device for rotor driven by melt extrusion pressure and provided with internal and external screw flights

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] This embodiment is a melt extrusion pressure-driven flow sharing method with inner and outer helicoidal rotors. After the polymer melt from the extruder is shielded in the input area of ​​the rotor, it is circularly flowed along the inner and outer helical ribs of the rotor. (i.e. circumferential) shunt flow, force the rotor to rotate after being filled with internal and external screw ribs, forming a multi-head spiral, and transport it to the output area of ​​the rotor with the rotation of the rotor, so that the extrusion speed is uniform along the circumferential direction of the rotor (i.e. circumferential direction) distributed. Among them, when the polymer melt flows through the rotor, the original beam-shaped melt is divided into several strands by the rotor, and eddy currents are generated when entering or flowing out of the grooves on the rotor, resulting in a change in the flow direction, thereby promoting polymerization Melting of the unmelted solid phase in t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a flow equalizing method and device for a rotor driven by melt extrusion pressure and provided with internal and external screw flights. The method comprises the steps that after polymer melt from an extruder encounters with a barrier in an input area of the rotor, circular flow dividing is carried out along the internal and external screw flights of the rotor, and the rotor is forced to rotate to form a multi-end spiral after the internal and external screw flights are filled with flow; and flow is conveyed to an output area of the rotor along with rotation of the rotor, and extrusion speed can be evenly distributed in the circular direction of the rotor. The device comprises a core mold, a mold head base body, a neck mold and the rotor which are arranged coaxially, and the rotor is provided with the internal and external screw flights. The core mold is arranged in the mold head base body, the rotor is arranged in a melt runner between the core mold and the mold head base body, and the neck mold is arranged at one end of the mold head base body. The external screw flights are arranged on the outer side of the rotor, the internal screw flights are arranged on the inner side of the rotor, a clearance is reserved between the inner side of the rotor and the core mold, and a clearance is reserved between the outer side of the rotor and the mold head base body. The problem that flow distribution of the polymer melt in a mold head is uneven can be effectively solved, and no drive device needs to be added.

Description

technical field [0001] The invention relates to a pipe extruding die head, in particular to a flow equalization method and device for melt extrusion pressure-driven rotors with internal and external helical ribs. Background technique [0002] The pipe extrusion die head is an indispensable and important part in the pipe extrusion production line. Its function is to keep the plasticized material in a plastic state and generate a certain pressure so that the plasticized material can be formed after passing through a certain flow channel. It is a tube blank with a circular cross-sectional shape. [0003] The die head mainly has the following functions: to change the material from spiral motion to linear motion; to generate the necessary molding pressure; to ensure the compactness of the product; to further plasticize the material through the die head; to shape the cross-sectional shape required by the die head products. Among the current flat die heads, the annular melt extru...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/70B29C47/20B29K23/00B29L23/00B29C48/32
CPCB29C48/255B29C48/30B29C48/32B29C48/705B29C48/71B29K2023/00B29L2023/00
Inventor 瞿金平
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com