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

Roll molding process for nylon particles

A technology of rotomolding and nylon, applied in the direction of coating, etc., can solve the problems of powder application precedent not yet found, immature application, narrow range, etc., to solve the poor coating of inserts, solve the problem of moisture absorption, and improve fluidity Effect

Inactive Publication Date: 2019-07-19
QINGDAO ROTOTECH YILI AUTOMOBILE PLASTIC PROD CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the range of materials used in the rotational molding industry is very narrow, and more than 95% are polyethylene materials. Due to the limitations of impact strength, high temperature and pressure resistance, the application is very limited, and the remaining 5% are polypropylene and polycarbonate. Ester, polyvinyl chloride and other materials, the application of these materials is not mature enough, so it is urgent to develop a new process to expand the application range of rotational molding
[0003] At this stage, there is no precedent for the use of powder in the rotational molding industry

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
  • Roll molding process for nylon particles
  • Roll molding process for nylon particles
  • Roll molding process for nylon particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A rotational molding process using nylon such as figure 1 shown, including the following steps:

[0021] A. Milling: Nylon particles are ground in the mill using low-temperature liquid nitrogen technology in a constant temperature and humidity environment, and dry air is sent into the mill to form a swirling airflow, so that the nylon powder is fully collided and self-grinded to form nylon powder. Nylon powder round particles accounted for more than 96%.

[0022] Nylon particles can be one or more kinds of nylon particles produced by Nanjing Julong Technology, BASF in the United States, Kuibyshev in Russia, etc. In the constant temperature and humidity workshop (constant temperature 23°C, air humidity 40%), low temperature liquid nitrogen process is used to grind granular nylon. After grinding for 25min-40min, a 30KW fan sends dry air to the inside of the mill to form a swirling airflow. Let the nylon powder fully collide and self-grind for 20-30 minutes, so that the ...

Embodiment 2

[0051] A rotational molding process that adopts nylon, different from embodiment 1, such as figure 2 As shown, a step of packaging is added between grinding and drying. The packaging is to fill the nylon powder into an aluminum foil packaging bag and seal it. The outer packaging is packaged in kraft paper and placed in a dry place for later use.

[0052] The method can separate the two processes of grinding and drying in time series, which is convenient for production.

Embodiment 3

[0054] A rotational molding process that adopts nylon, different from embodiment 1, such as image 3 As shown, the color matching step is added between grinding and drying, and the color matching is to add the toner and nylon powder into the mixer and stir for 15-25 minutes.

[0055] The effect of this method is to produce rotationally molded products of different colors.

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

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
heat deflection temperatureaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a roll molding process for nylon particles, and relates to the technical field of roll molding processes. The roll molding process comprises the following steps of grinding, specifically, the nylon particles are ground in a constant temperature and humidity environment using a low temperature liquid nitrogen process in a grinder, and an swirling airflow forms by feeding dryair into the grinder, so that nylon powders collide fully with self-grinding to form the nylon powders, and the proportion of nylon powder round particles is up to more than 96%; drying; feeding; molding; heating a heating chamber of a roll molding machine by circulating hot air; cooling; and demoulding. The beneficial effects of the roll molding process for the nylon particles are that the flowability of the nylon powders is improved by the grinding process, and the tensile yield strength and bending modulus are significantly improved, and then the problem of poor insert coating and the phenomenon of material shortage in a fine runner are solved; the moisture content is reduced, so that the problem of moisture absorption of the nylon powders is solved, and pinholes and sand holes on thesurface of roll molding products are avoided; and the roll molding process is suitable for the improvement and innovation of roll moulding molds of the nylon powders.

Description

technical field [0001] The invention relates to the technical field of rotational molding technology, in particular to a rotational molding technology using nylon. Background technique [0002] At present, the range of materials used in the rotational molding industry is very narrow, and more than 95% are polyethylene materials. Due to the limitations of impact strength, high temperature and pressure resistance, the application is very limited, and the remaining 5% are polypropylene and polycarbonate. Ester, polyvinyl chloride and other materials, the application of these materials is not mature enough, so it is urgent to develop a new process to expand the application range of rotational molding. [0003] At this stage, no application precedents have been found for the use of powder in the rotational molding industry. Contents of the invention [0004] The purpose of the present invention is to innovate the application of new materials in the rotational molding process, ...

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): B29C41/04B29C41/46B29C41/52B29B13/10B29B13/06
CPCB29B13/065B29B13/10B29C41/04B29C41/46B29C41/52
Inventor 盛野金文杰国耀谭浩鹏李帅帅薛志超
Owner QINGDAO ROTOTECH YILI AUTOMOBILE PLASTIC PROD CO LTD
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