Method for producing a cleat sole
The invention relates to a method for the production of a sole ( 3 ) having at least one cleat ( 1 ), wherein the cleat ( 1 ) is arranged at the bottom side ( 2 ) of the sole ( 3 ). To improve the demoulding of the sole supplied with cleats from the injection molding tool, the invention comprises the steps: a) Production of at least on cleat ( 1 ), wherein the cleat ( 1 ) has a cleat base body ( 4 ) which can be connected with the sole ( 3 ), wherein at least one extension ( 5 ) is arranged at the cleat base body ( 5 ) which extents toward the ground; b) Inserting of the cleat ( 1 ) in a holding part ( 6 ), wherein the holding part ( 6 ) has a congruent receiving space ( 7 ) for at least a part of the cleat base body ( 4 ) and for the extension ( 5 ); c) Placing of the cleat ( 1 ) together with the holding part ( 6 ) in a recess ( 8 ) in a at least two-part injection molding tool ( 9, 10 ), so that a part of the cleat ( 1 ) projects into the cavity ( 11 ) which is formed between the parts of the injection molding tool; d) Injection molding of at least a part of the sole ( 3 ) by injecting of plastic melt into the cavity ( 11 ) of the injection molding tool ( 9, 10 ), so that a part of the cleat ( 1 ) is coated by the plastic melt; e) Demoulding of the injection-molded sole ( 3 ) together with the coated cleat ( 1 ) and the holding part ( 6 ); f) Removing of the holding part ( 6 ) from the cleat ( 1 ).
1. Method for the production of a sole having at least one cleat, wherein the cleat is arranged at the bottom side of the sole,
the method comprises:
a) Producing of at least one cleat, wherein the cleat has a cleat base body which can be connected with the sole, wherein at least one extension is arranged at the cleat base body which extents toward the ground during intended use and wherein the vertical projected area (A F ) of the end of the extension which is facing the ground is arranged at least partially outside of the vertical projected area (A G ) of the cleat base body;
b) Inserting of the cleat in a holding part, wherein the holding part has a congruent receiving space for at least a part of the cleat base body and for the extension;
c) Placing of the cleat together with the holding part in a recess in an at least two-part injection moulding tool, so that a part of the cleat projects into the cavity which is formed between the parts of the injection moulding tool;
d) Injection moulding of at least a part of the sole by injecting of plastic melt into the cavity the injection moulding tool, so that a part of the cleat is coated by the plastic melt;
e) Demoulding of the injection-moulded sole together with the coated cleat and the holding part;
f) Removing of the holding part from the cleat.
2. The method according to claim 1 , wherein the holding part is designed undercut-free in open and closing direction of the injection moulding tool when being inserted in its position in the recess in the injection moulding tool.
3. The method according to claim 2 , wherein the holding part has a cylindrical shape, wherein the holding part is inserted into the recess in the injection moulding tool in such a way that the axis of the cylinder is directed in open and closing direction of the injection moulding tool.
4. The method according to claim 1 , wherein before the injection moulding of the sole takes place according to step d) a laminar shaped reinforcing part is inserted in the cavity of the injection moulding tool.
5. The method according to claim 4 , wherein the reinforcing part comprises glass fibre or carbon fibre.
6. The method according to claim 1 , wherein at least two cleats are arranged at the sole, wherein at least two extensions of two cleats are directed in different directions.
7. The method according to claim 1 , wherein during injection moulding of the sole according to step d) a plurality of anchor elements which are arranged at the cleat base body is coated with material of the sole.
8. The method according to claim 1 , wherein the holding part is produced from polyamide.
9. The method according to claim 1 , wherein the cleat is produced as a two-component plastic part.
10. The method according to claim 1 , wherein the cleat consists at least partially of thermoplastic elastomer material on a urethane basis (TPU).