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Small plastic part laser melting extrusion molding method and apparatus thereof

A technology of extrusion molding and laser melting, which is applied in the field of laser melting extrusion molding methods and devices for high-precision micro-sized plastic parts, can solve problems such as weld lines, and achieve the effects of eliminating weld lines, saving energy consumption, and high absorption

Active Publication Date: 2013-09-25
盐城动益汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of welding lines commonly existing in the existing miniature plastic parts molding process, and to invent a laser melting and extrusion molding method for high-precision miniature plastic parts based on infrared laser melting and mold extrusion molding and devices

Method used

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  • Small plastic part laser melting extrusion molding method and apparatus thereof
  • Small plastic part laser melting extrusion molding method and apparatus thereof
  • Small plastic part laser melting extrusion molding method and apparatus thereof

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Experimental program
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Embodiment 2

[0039] Such as figure 2 shown.

[0040] A laser melting extrusion molding device for micro-miniature plastic parts, it comprises the following steps:

[0041] a. According to the volume and weight of plastic parts, customize pre-processed plastic blanks, which can be powder, solid particles, etc.; calculate and determine the extrusion force, extrusion time, mold opening and closing time, etc. required for the molding process; set Determine the control program and operation commands of the control system.

[0042] b. Work preparation, accurate calculation and determination of laser parameters, so that the laser power, irradiation time, spot diameter, focal length, spot energy distribution and spot shape output by the infrared laser meet the processing requirements; the temperature heating controller starts to heat the moving template, and the heating temperature 5 to 20 degrees below the glass transition temperature of the plastic material;

[0043] c. When the work starts,...

example 1

[0050] Laser melting and extrusion molding of micro plastic gears, the material of micro plastic gears is PA12, the diameter of addendum circle is 1.2mm, the diameter of dedendum circle is 1mm, the number of teeth is 24, and the tooth thickness is 0.8mm. PA12 physical parameters: density 1.02g / cm 3 , Heat distortion temperature 68~150°C, melting temperature 186~190°C. First, the weight of each gear is calculated to be about 0.78mg; the laser parameters are selected as spot diameter 2mm, laser power 1W, focal length 100mm, and irradiation time 0.5s; the heating temperature range of the moving template is set to 60~65°C. Mold manufacturing must meet the requirements, especially, the mold cavity of the shaped core is precisely machined according to the outer dimensions of the plastic gear parts, and the movable core and the shaped core are precisely matched to ensure that the movable core can slide and cooperate in the shaped core. When the work starts, the extrusion mold is ope...

example 2

[0052] Laser melting extrusion molding of small shell plastic parts, small shell plastic parts such as image 3 As shown, the diameter of the outer circle is 4.7mm, the wall thickness is 0.2mm, the height is 0.8mm, the material is PC, and the physical parameters of PC are: density 1.19g / cm 3 , Heat distortion temperature 120~200°C, melting temperature 240~290°C. First, the weight of each plastic part is calculated to be about 2.7mg; the laser parameters are selected as spot diameter 5mm, laser power 5W, focal length 100mm, and irradiation time 0.2s; the heating temperature range of the moving template is set as: 105~115°C. When the work starts, the extrusion mold is opened, the servo motor controls the brake plate to move downward, and at the same time the movable core moves downward in the fixed core, take 2.7mg of plastic PC powder material and add it to the mold cavity; after feeding, the servo motor controls the brake plate to move upward , until the movable template and ...

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Abstract

The invention discloses a small plastic part laser melting extrusion molding method and an apparatus thereof, relates to the high-precision small plastic part molding processing field, and especially relates to an infrared laser melting and die extrusion molding based small plastic part molding method and an apparatus thereof. Traditional high-precision small plastic parts have the disadvantages of high injection molding processing cost, difficult control of the quality of the an injection part, and severe wastes of plastic raw materials and energy. In the invention, infrared laser rapid heating melting and molding die extrusion molding processing technologies are adopted for the high-precision thermoplastic small plastic part. The small plastic part laser melting extrusion molding method and the apparatus thereof have the advantages of high molding precision, good molding quality, high efficiency and low cost, are suitable for the batch automatic molding processing of high-precision small plastic parts, and have high application values.

Description

technical field [0001] The invention relates to a processing and forming technology for micro-sized plastic parts, especially a technology for forming by using laser melting technology, specifically a technology suitable for high-precision micro-sized plastic parts such as micro-gears and small shell parts. A laser melting extrusion molding method and device for high-precision miniature plastic parts based on infrared laser melting and mold extrusion molding. Background technique [0002] At present, plastic micro-small parts refer to high-precision plastic parts with dimensions of several millimeters or less, and their dimensional accuracy reaches microns. They are widely used in aerospace, electronic information, biochemistry, precision instruments and other fields. However, traditional high-precision The processing cost of micro plastic parts is high, the quality of injection molded parts is not easy to control, and the waste of plastic raw materials and energy is seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/02B29C43/36B29C43/58B29C43/52
Inventor 谭文胜周建忠黄舒孟宪凯师彩云陈寒松陈松玲
Owner 盐城动益汽车配件有限公司
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