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

Micro-injection moulding method based on laser plasticizing and impacting technology and apparatus

A technology of laser shock and micro-injection, which is applied in the direction of coating, etc., can solve the problems of poor stability of one-time injection volume control accuracy and molding quality, difficult screw processing, and high strength requirements, and achieve simple structure, high injection molding quality, and melting Uniform plasticizing effect

Active Publication Date: 2015-02-04
JIANGSU UNIV
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Screw micro-injection molding machine, the plasticization, metering and injection are all completed by a group of screws. The diameter generally cannot be lower than 14mm, which makes the control accuracy of the equipment for one injection volume and the stability of the molding quality poor
In terms of material processing using laser shock technology, Jiangsu University has obtained a series of patents and research results, such as impact forming of sheet metal, patents include ZL02264630.2, CN1931467A, CN101518852A, etc. Laser shock forming is induced by high-energy laser The force effect of high-amplitude shock wave pressure, rather than thermal effect, enables plastic forming processing of sheet metal, however, does not involve fast and efficient micro-injection molding based on laser processing

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
  • Micro-injection moulding method based on laser plasticizing and impacting technology and apparatus
  • Micro-injection moulding method based on laser plasticizing and impacting technology and apparatus
  • Micro-injection moulding method based on laser plasticizing and impacting technology and apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] Example 1, taking typical thermoplastic PMMA as an example, the melting temperature range of plastic PMMA is 250-370 degrees, CO 2 The laser is used as a laser for plasticization, and the laser wavelength generated is 10.6 microns, and the plastic PMMA has a 2 Laser absorption is good. The valve is in the working state 2. After drying, the plastic PMMA particles, with a diameter of 2mm, a height of 2mm, and a mass of 6.5mg, are put into the plasticizing cylinder with a preheating temperature of 105-220 degrees, and the plasticizing rod is pressed against the PMMA particles. , the laser starts to work, and outputs a continuous wave low-power laser with a spot diameter of 5mm and a power of 2W, and is irradiated at a fixed point, and the irradiation time is 0.05-0.1s. After the plastic PMMA is plasticized, the valve turns to working state 1, and the plasticizing rod pushes the plastic melt into the injection unit. After the plastic melt is injected into the injection uni...

example 2

[0043] Example 2, taking typical thermoplastic polyurethane TPU as an example, the melting temperature range of plastic TPU is generally between 170-205 degrees, CO 2 The laser wavelength generated by the laser is 10.6 microns, and the plastic TPU absorbs it well. The diameter of plastic TPU particles is 2mm and the thickness is 2mm. After drying, weigh 50mg with a precision balance and put it into a plasticizing cylinder with a preheating temperature of 140-170 degrees. 2 The laser starts to work, outputting a continuous wave low-power laser with a spot diameter of 3mm and a power of 3W, and continuously scans and irradiates the plastic TPU for 5s. The plastic TPU is plasticized and injected into the injection unit. The pulse wave laser of the laser shock injection system generates high-energy pulse laser. The energy of the pulse laser is 5J, the diameter of the spot is 5mm, and the pulse width is 20ns. The absorbent absorbs the laser energy and is ionized by high temperature...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a micro-injection moulding method based on laser plasticizing and impacting technology and an apparatus, and relates to a plastic micro-moulding field, particularly a plastic micro-injection moulding method based on the laser plasticizing and impacting action, suitable for plastic micro-injection moulding process. The apparatus comprises: a plastic plasticizing system, which is composed of a laser, a laser beam controller, a plasticizing cylinder, a valve and a heating and temperature controlling device; an impact propulsion and injection system, which is composed of a laser generator, a restraint layer, a laser absorbent, a impact injection push rod, and a heating and temperature controlling device; a mould; and a computer control system, for controlling the plasticizing system, the impact propulsion injection system and the valve, and controlling the temperature. The invention provides a novel micro-injection moulding method and an apparatus, resolves the problems in the plastic plasticization and melt injection propulsion manners for micro-injection moulding, and implements the purposes of energy saving, environmental protection and high efficiency for micro-injection moulding.

Description

technical field [0001] The invention relates to the field of micro-injection molding, in particular to a micro-injection molding method and device based on laser plasticization and laser shock technology, which is suitable for injection molding processing of tiny plastic parts. Background technique [0002] As we all know, with the progress of micro-nano science and technology, micro-electro-mechanical system products continue to develop towards miniaturization, and micro-injection molding technology with a characteristic scale of milligram level has been highly valued by people. Compared with traditional injection molding technology, Micro-injection molding puts forward higher requirements on molding process and molding equipment. The special requirements of micro-injection molding technology are mainly reflected in the following aspects: [0003] (1) Injection rate. Due to the small mass and volume of microinjection molded parts, high injection rates are required during m...

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 Patents(China)
IPC IPC(8): B29C45/00B29C45/17B29C45/46B29C45/76
Inventor 谭文胜周建忠黄舒杨晶陈寒松陈松玲孟宪凯
Owner JIANGSU UNIV
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