Unterschiede

Hier werden die Unterschiede zwischen zwei Versionen angezeigt.

--- en:materialdaten:tribologische_daten [2025/01/08 14:35] – cschall
+++ en:materialdaten:tribologische_daten [2025/05/20 11:17] (aktuell) – cschall
@@ Zeile 1: / Zeile 1: @@
 ======Tribological data======
-The tribological data is required to take into account the conveying of solids in the feed zone. A distinction is made between the values for the friction of the plastic on the barrel wall $μ_z$ and the screw $μ_s$.
-{{ :materialdaten:rex171_mat_en_006.png?600 |}}
+===== Material data - Tribology=====
-The problem here is obtaining the necessary friction coefficients. It is advisable to determine the necessary data by conducting your own series of tests.
+The tribological data (coefficients of friction) of the material are entered in the ‘Tribology’ tab. The input is optional and is only required for the calculation of [[en:berechnungen:nutbuchsenberechnung|Grooved bushings]].
+  * **Barrel friction coefficient** $\mu_z$: Coefficient of friction between the plastic and the barrel
+  * **Screw friction coefficient** $\mu_s$: Coefficient of friction between the plastic and the screw
+  * **Friction coefficient at melt film formation** $\mu_{z1}$: Coefficient of friction when changing from solid friction to melt film friction (only required for [[en:berechnungen:nutbuchsenberechnung|limited speed orientated grooved bushing calculation]]). This value is difficult to determine. Calibration based on known grooved bushing processes is recommended.
+  * **Internal coefficient of friction** $\mu_i$: Coefficient of friction between the granules
+{{ :materialdaten:rex180_mat_en_006.png?nolink |}}
+However, determining the necessary friction coefficients is problematic and error-prone.
 ===Further topics===
   * [[en:materialdaten:datenbankanbindung_an_pam|]]
   * [[en:materialdaten:allgemeineangaben|]]
-  * [[en:materialdaten:rheologische_materialdaten|]]
   * [[en:materialdaten:thermodynamische_daten|]]
   * [[en:materialdaten:dichtedaten_bzw._spezifisches_volumen|]]
-  * [[en:materialdaten:tribologische_daten|]]
+  * [[en:materialdaten:rheologische_materialdaten|]]
   * [[en:materialdaten:technologische_daten|]]
+  * [[en:materialdaten:tribologische_daten|]]
+  * [[en:materialdaten:zusatzstoffe|]]
   * [[en:materialdaten:molekulargewicht|]]
   * [[en:materialdaten:faserabbau|]]
   * [[en:materialdaten:eingabe_von_mischungen|]]