Remove normals from single mesh face

Hi,
my progress stopped understanding the rhino behavoir as i’m unable to remove normals from a mesh i have exploded into single faces.

In the example file the explode is done on the left with a commercial plugin that creates mesh faces without normals. If i make a mesh offset i get perfect quad elements.

My own script always creates a normal on the face the leads to intersecting quad elements.
is there a way to remove this normal?

import rhinoscriptsyntax as rs
import Rhino.Geometry as rg
import scriptcontext as sc
import Rhino
import scriptcontext
import math
import os


def unweld_all_faces(mesh_id):
    # Netz aus der Rhino-Dokumentation abrufen
    mesh = rs.coercemesh(mesh_id)
    
    if not mesh:
        print("Kein Netz gefunden.")
        return
    
    # Das Netz explodieren (d.h. in einzelne Faces zerlegen)
    exploded_meshes = []
    
    for face_index in range(mesh.Faces.Count):
        # Extrahiere jede Face als einzelnes Netz
        single_face_mesh = Rhino.Geometry.Mesh()
        
        # Hole die Eckpunkte der aktuellen Face
        face = mesh.Faces[face_index]
        vertices = [mesh.Vertices[face.A], mesh.Vertices[face.B], mesh.Vertices[face.C], mesh.Vertices[face.D]]
        
        # Füge die Vertices zum neuen Netz hinzu
        for vertex in vertices:
            single_face_mesh.Vertices.Add(vertex)
        
        # Füge die Face zum neuen Netz hinzu (unabhängig von der Anzahl der Punkte)
        if face.IsQuad:
            single_face_mesh.Faces.AddFace(0, 1, 2, 3)  # Quad Face
        else:
            single_face_mesh.Faces.AddFace(0, 1, 2)  # Triangular Face
        
       #Normals, Texturen, Farben usw. können hier auch übertragen werden, falls nötig
       #single_face_mesh.Normals.ComputeNormals()
       #single_face_mesh.Compact()
        
        # Füge das explodierte Netz zur Liste hinzu
        exploded_meshes.append(single_face_mesh)
    
    # Lösche das ursprüngliche Netz
    rs.DeleteObject(mesh_id)
    
    # Füge die explodierten Netze zur Rhino-Dokumentation hinzu
    for single_mesh in exploded_meshes:
        sc.doc.Objects.AddMesh(single_mesh)
    
    sc.doc.Views.Redraw()
    print(f"{len(exploded_meshes)} Faces erfolgreich unwelded und explodiert.")

mesh = rs.GetObject("getmesh")

unweld_all_faces(mesh)
    

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