Composite screw co-extruder

A technology of screw extruder and extruder head, applied in the field of compound co-extrusion screw extruder, can solve the problems of affecting the appearance and quality of products, large equipment investment, large floor space, etc., to improve product processing quality, Ease of maintenance, increased conveying capacity and yield

Inactive Publication Date: 2007-04-04
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the equipment used for compound co-extrusion is a combination of two or more screw extruders, which extrude different materials into the co-extrusion die for compounding. The equipment investment is large, complex, and the equipment occupies a large area. , especially the more layers of composite products, the more prominent this problem is. In addition, the molten materials from different extruder barrels must be redistr

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
  • Composite screw co-extruder
  • Composite screw co-extruder
  • Composite screw co-extruder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: Extrude the composite sheet with the compound co-extrusion screw extruder of the present invention, the first layer is polypropylene PP, the second layer is polyethylene PE, adopts compound co-extrusion sheet head, outer screw diameter D 1 =120mm, aspect ratio ( L D ) 1 = 25 : 1 , Internal screw D 2 =65mm, aspect ratio ( L D ) 2 = 28 : 1 The outer screw extrudes polypropylene (PP), the inner screw extrudes polyethylene (PE), the outer screw rotates under the drive of the motor, the outer screw speed n 1 =20~40r / min, the internal screw is fixed on the stator. The barrel is a segmented barrel, and the temperature of each s...

Embodiment 2

[0019] Embodiment 2: Extrude the composite pipe with the composite co-extrusion screw extruder of the present invention, the first layer A is polypropylene (PP), the second layer B is polyethylene (PE), and the composite co-extrusion pipe head is adopted, External screw diameter D 1 =90mm, aspect ratio ( L D ) 1 = 25 ; Internal screw D 2 =45mm, aspect ratio ( L D ) 2 = 28 , The material PP is extruded by the external screw, and the material PE is extruded by the internal screw. The internal screw and the external screw are driven by their respective motors to perform reverse rotation, and the external screw speed is n 1 =20~40r / min, internal screw speed is n 2 = 0 ~ 30r...

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

A complex screw-bolt extruder for dual-layer coextruding out is composed of a feeding unit able to feed different two materials, a barrel with the first feeding inlet and the second feeding inlet, the nested internal and external screw bolts in said barrel and with different rotational directions, and a common extruding head. Said two feeding inlets on said barrel are used respectively for said internal and external screw bolts.

Description

technical field [0001] The invention relates to a composite co-extrusion screw extruder, which can be used for composite co-extrusion of plastic products such as composite plates, films, pipes, sheets, optical fiber cables and the like. Background technique [0002] Composite co-extrusion is a processing method in which two or more polymers with different properties are co-extruded to form a multi-layer single product. Such as multi-layer sheets, films, plates, pipes, cables and multi-layer hollow containers. At present, the equipment used for compound co-extrusion is a combination of two or more screw extruders, which extrude different materials into the co-extrusion die for compounding. The equipment investment is large, complex, and the equipment occupies a large area. , especially the more layers of composite products, the more prominent this problem is. In addition, the molten materials from different extruder barrels must be redistributed to meet the requirements of t...

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
IPC IPC(8): B29C47/06B29C47/48B29C47/66B29C47/82B29C47/84B29C47/08B29C48/445
CPCB29C47/48B29C48/445
Inventor 朱复华贾明印薛平梁斌
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap