Device and a method for manufacturing an elongated hollow profile element, an elongated hollow profile element, and a bending section for an endoscope
The invention relates to a device for manufacturing an elongated hollow profile element that has at least one pulling wire ( 13 ), comprising: two counter-bearings ( 11, 12 ), which are arranged on opposite sides of the device and which correspond to the elongated ends of the elongated hollow profile element, wherein one end of the at least one pulling wire ( 13 ) is anchored to the distal counter-bearing ( 11 ), and a mold ( 2 a, 2 b ), which forms a sealed elongated cavity ( 3 ) that can be filled with a hardening material, wherein the cavity ( 3 ) extends between the two counter-bearings ( 11, 12 ) and the pulling wire ( 13 ) extends in the cavity ( 3 ) so as not to touch the cavity wall. The invention further relates to a method for manufacturing an elongated hollow profile element that has at least one pulling wire ( 13 ), the elongated hollow profile element, and a bending section for an endoscope.
1. A method for manufacturing an elongated hollow profile element comprising at least one axial opening in which a pulling wire is arranged axially relative to the hollow profile element in a pullable manner, the pulling wire being used for transmitting a pivoting movement of a control element to a bending section, comprising the steps of:
providing a mold which forms a sealed elongated cavity that can be filled with a hardening material, wherein the cavity extends between two counter-bearings that seal the cavity;
inserting at least one pulling wire into the mold such that one end of the at least one pulling wire is anchored to the distal counter-bearing, wherein the pulling wire extends in the cavity so as not to touch the cavity wall;
filling the cavity with a hardening material for forming the hollow profile element;
curing the hardening material; and
opening the mold,
wherein, at the end of the manufacturing process, the at least one pulling wire remains arranged in a pullable manner in the hardened material relative to the hollow profile element.
2. The method according to claim 1 , comprising the step of:
after opening the mold;
pulling the at least one pulling wire such that the pulling wire gets disengaged from the hardened material surrounding it and a movement channel for the pulling wire is formed.
3. The method according to claim 1 , wherein
the hardening material is an elastomer.
4. The method according to claim 3 , wherein
the elastomer is silicone, a natural rubber or a silicone rubber.