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Method for estimating non-Newtonian index of resin material by utilizing injection molding machine

A non-Newtonian index and resin material technology, applied in the field of injection molding, can solve the problems of capillary structure and assembly complexity and high cost

Active Publication Date: 2015-12-09
GUANGZHOU HKUST FOK YING TUNG RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this design is that the structure and assembly of the capillary are more complicated and the cost is higher

Method used

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  • Method for estimating non-Newtonian index of resin material by utilizing injection molding machine
  • Method for estimating non-Newtonian index of resin material by utilizing injection molding machine
  • Method for estimating non-Newtonian index of resin material by utilizing injection molding machine

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Embodiment Construction

[0034] refer to figure 1 , the present invention is a method for estimating the non-Newtonian exponent of a resin material using an injection molding machine, comprising the following steps:

[0035] 1) Record the parameters of the injection molding machine, including the inner diameter r of the barrel 1 and the structural parameters in the range from the pressure sensor 4 to the front end of the nozzle 3, including the radius R and length l of each circular tube flow channel, and the radius R1 of the two ends of the conical tube flow channel and R2 and the convergence angle α of the conical pipe flow channel;

[0036] 2) After heating the injection molding machine for a period of time, the temperature at the nozzle 3 and the adapter 2 on the injection molding machine is constant and evenly distributed, and the air injection test is started, and the temperature of the injection molding machine is still maintained during the air injection test. A constant and uniform distribut...

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Abstract

The invention discloses a method for estimating a non-Newtonian index of a resin material by utilizing an injection molding machine. The method comprises the following steps: arranging a pressure sensor in the injection molding machine to measure integral total pressure drop data in the injection molding machine and calculating theoretical pressure drop of each position according to the dimension of each part on the injection molding machine and an adaptor; and carrying out linear fitting to obtain the non-Newtonian index of the material. The method is convenient in operation and simple in step flow; and results obtained by virtue of the linear fitting are high in accuracy. The method is used for the field of injection molding.

Description

technical field [0001] The invention relates to the field of injection molding, in particular to a method for estimating the non-Newton index of a resin material by using an injection molding machine. Background technique [0002] In the injection molding process, understanding the flow characteristics of the molten resin in the injection molding machine and the mold is critical to judging the processing performance of the resin and the quality of the injection product. The flow properties here refer to the viscosity as well as the non-Newtonian exponent of the material. The flow characteristics of the resin determine its flow when it is subjected to a certain force in the injection molding machine and the mold, which has guiding significance for parameter setting and quality control, but this data is not provided in the material supplier's manual. The commonly used way to measure material properties is through experimental research equipment such as capillary rheometer or ...

Claims

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Application Information

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IPC IPC(8): B29C45/76B29C45/77
CPCB29C45/76B29C45/77B29C2945/76006
Inventor 刘超姚科高福荣
Owner GUANGZHOU HKUST FOK YING TUNG RES INST
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