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Rheometer

A technology of rheometer and flow characteristics, which is applied in the field of rheometer, can solve the problems that it is impossible to simulate or study the plasticizing screw, etc., and achieve the effect of high quality and reproducible production process quality

Active Publication Date: 2020-12-15
莱斯特里浇铸压制技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not possible to simulate or study the complex processes in plasticizing screws, especially in barrier screws, in this way

Method used

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Examples

Experimental program
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Embodiment Construction

[0054] figure 1 An exemplary embodiment of a rheometer according to the invention is shown in an open state. in this regard, figure 2 A cross-sectional view for illustration is shown. The rheometer has a housing 1 in which two channels 4 are formed parallel to each other. The two channels 4 are separated from each other by a web 8 which can be made detachable. The web 8 has a top edge 10 which is spaced from the inner wall of the cover plate 12 . This spacing creates a gap 9 (see especially figure 2 and Figures 4a to 4c ).

[0055] Such as figure 1 As shown, the housing is provided with an inflow distributor 13 which distributes the inflowing fluid substance to the inlets 2 of the two parallel channels 4 . The fluid thus flows through the channel 4 and exits through the outlet 3 . For illustrative purposes, Figure 5 This arrangement is shown again in . Figure 5 Also shown is a further pump 14 which can be provided for delivering fluid.

[0056] In the area of ...

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Abstract

The invention relates to a rheometer for determining and / or monitoring the flow behavior of viscous fluids, in particular plastic melts and plastic solutions. The rheometer comprises a housing (1) in which at least one substantially rectilinear channel (4) is formed between an inlet (2) and an outlet (3), wherein the channel (4) has a rectangular cross-section and includes a A plurality of pressure measuring devices (5) arranged in a channel (4), wherein the channel (4) is provided with a cross-section which narrows (6) and widens (7) periodically over its length.

Description

technical field [0001] The invention relates to a rheometer, in particular for determining and / or monitoring the flow properties of thermoplastics. [0002] In particular, the invention relates to a rheometer as characterized in the preamble of claim 1 . Background technique [0003] Thermoplastics are usually processed by extrusion or injection molding. For material preparation, compounders or co-rotating twin-screw extruders are generally used. In this case, the plasticization of the plastic is usually carried out by means of a screw plasticization unit. Plasticized plastic melts are generally non-Newtonian fluids that exhibit either time-dependent or shear-rate-dependent behavior. Here, the viscosity is not constant but varies with the shear rate. However, plastic melts and plastic solutions also exhibit complex extensional rheological behavior, since extensional viscosity depends on strain rate and stress duration and specific effects occur, such as strain hardening....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/00
CPCG01N11/00G01N11/02G01N11/08G01N2011/002
Inventor 于尔根·米尔斯林格
Owner 莱斯特里浇铸压制技术有限责任公司
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