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# Is flow rate the same as extrusion multiplier?

## Is flow rate the same as extrusion multiplier?

The extrusion multiplier, which is called “flow rate” in Ultimaker’s Cura, specifies the rate at which your printer will extrude material. Most materials use a flow rate between 90% and 110%, but you can increase this value above or below these percentages.

## What is extrusion rate?

The extrusion ratio is defined as the starting cross-sectional area divided by the cross-sectional area of the final extrusion. One of the main advantages of the extrusion process is that this ratio can be very large while still producing quality parts.

## How do you calculate flow in a 3D printer?

The simplest way to understand flow rate (AKA extrusion multiplier) is that it multiplies how much plastic the 3D printer is told to extrude. A flow rate of 1.5 makes the printer extrude 50 % more plastic, a flow rate of 0.5 makes it extrude 50 % less.

## What should the RAM speed be for hot extrusion?

Typical ram speed used in hot extrusion of refractory metals is 0.4 to 0.6 m/s [49]. Some metals (e.g. Al, Cu) may show incipient melting or hot shortness during extrusion and hence ram speed is limited to a few mm/s.

## What happens when the extrusion ratio is increased?

Thus, it is clear that increasing the extrusion ratio will decrease and even avoid damage or/and fracture during the extrusion of the large-scale Inconel 690 alloy tube. The reason may be the improved effects of three-dimensional compressive stresses with increasing the extrusion ratio. Figure 21.

## What’s the difference between maximum velocity and minimum extrusion?

Generally, the extrusion pressure required for Al-MMCs is slightly higher than that required for the corresponding unreinforced alloy, while maximum velocity (at which surface tear becomes apparent) is significantly lower. At low temperature, a minimum extrusion velocity was identified as the one inducing the so-called stick-slip tearing.

## How is the extrusion ratio used in drmmcs?

Extrusion is widely used to enhance reinforcement distribution and breakup of particle clusters, decrease porosity, improve interfacial bonding strength, refine microstructure, and finally improve strength and ductility of DRMMCs. The main process parameters are the extrusion temperature, rate, and ratio.