Method of making a transducer having a plastic matching layer
Making a transducer having a plastic matching layer which includes providing a transducer housing having a proximal end and a distal end, and bonding a plastic to the distal end of the transducer housing (the plastic fluidly sealing and occluding the distal end). The bonding further includes inserting a cylinder comprising a mold-release chemical into the transducer housing, bonding plastic onto the distal end of the transducer housing, and removing the cylinder when the plastic has hardened.
1. A method comprising:
providing a transducer housing having a proximal end and a distal end; and
bonding a plastic to the distal end of the transducer housing, the plastic fluidly sealing and occluding the distal end; wherein bonding further comprises:
inserting a cylinder comprising a mold-release chemical into the transducer housing;
bonding the plastic onto the distal end of the transducer housing; and
removing the cylinder when the plastic has hardened.
2. The method as defined in claim 1 wherein bonding further comprises bonding the plastic to a circumferential ridge on the external surface of the transducer housing proximate to the distal end.
3. The method as defined in claim 1 wherein bonding further comprises bonding the plastic to a circumferential groove on the external surface of the transducer housing proximate to the distal end.
4. The method as defined in claim 1 wherein bonding further comprises bonding the plastic to a taper on the external surface of the transducer housing proximate to the distal end.
5. The method as defined in claim 1 wherein bonding further comprises bonding the plastic having a coefficient of thermal expansion greater than that of the transducer housing.
6. The method as defined in claim 1 wherein the plastic resides external of an internal volume defined by the transducer housing.
7. The method as defined in claim 1 wherein bonding further comprises setting the plastic in a mold having an inside diameter greater than an outside diameter of the transducer housing.
8. The method as defined in claim 7 further comprising machining the plastic to the same outer diameter as the transducer housing.
9. The method as defined in claim 1 wherein bonding further comprises setting the plastic in a mold having an inside diameter substantially the same as an outside diameter of the transducer housing.