Textile valves manufacturing requirements

Heim studied the different mathematical conditions that must be followed in the model in order to limit the strain between the two positions (Heim et a/., 2008). From the work reported, the values for the variables a, r, and p are defined as functions of the valve radius R a = 52°, r = 0.074i p = 0.94i . 

For any R value, the counter-mold geometry can thus be defined in the circumferential direction with reference to the previously described criteria. 

According to these functioning requirements, the valve leaflet should preferably be designed with an elliptical arc shape between points A and Bq, when the leaflet is in the semiclosed position. The geometrical shape is characterized by the mathematical equation  

On the upper part, the counter-mold is characterized by three cusp-shaped geometries, defined according to the calculations presented in the previous section. On the lower part, the geometry is cylindrical to help control the shaping process as described in more detail below. 

7 Manufacturing device (counter-mold, clamps, holding ring). 

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