Rod cradle for a film, coating or sealing rod
View Patent ↗A cradle for a film, coating, or sealing rod has a profile ( 10 ) that includes a base part ( 11 ), a rod groove ( 16 ), and a body part ( 14 ) between them. The rod groove ( 16 ) is arranged to receive the rod ( 12 ) between lips ( 20, 20′ ) edging the rod groove ( 16 ). The circumference lying against the rod ( 12 ) is formed at least partly of a slider piece ( 22 ), which is an insert-molded part of the profile ( 10 ), and which is of a material other than the material of the base part ( 11 ) and the body part ( 14 ).
1. A surface-sizing or coating device for use in paper and board machines, comprising:
a coating rod;
a rod cradle having a base part, portions of the rod cradle defining a rod groove, and a body part which is between the base part and the rod groove;
wherein the coating rod is mounted in the rod groove;
wherein the portions defining a rod groove include circumference portions edging the rod groove, the circumference portions including portions forming lips, the rod groove mounting the rod between said lips, and wherein the circumference portions are arranged to lie against the rod;
wherein the base part, the body part, and the lips are formed of a first plastic material; and
wherein said circumference portions are formed partly by a slider piece of a second plastic material different than the first plastic material which is permanently joined as an insert-molded part of the cradle.
2. The rod cradle of claim 1 , wherein the insert-molded slider piece forms all the circumference portions and also has portions forming a liquid groove contiguous with the rod groove.
3. The rod cradle of claim 1 wherein the slider piece is polyurethane.
4. The rod cradle of claim 1 wherein the slider piece is polyurethane filled with a substance that reduces friction.
5. The rod cradle of claim 1 , wherein the slider piece has portions which engage the rod which comprise a bottom portion of the rod groove, and wherein the slider piece is non-homogenous, such that the material forming the bottom portion of the rod groove has a lower coefficient of friction than all other circumference portions.
6. An insert-molded rod cradle for a film, coating, or sealing rod for use in paper and board machines, comprising:
a first molding having portions forming a base part, portions defining a rod groove, and portions forming a body part which is between the base part and the rod groove, wherein the first molding is formed of a first plastic material;
a second molding of a second plastic material different than the first plastic material which second molding is an insert-molded part of the rod cradle, wherein the first molding and the second molding are joined permanently to each other, wherein the portions defining a rod groove include circumference portions edging the rod groove, the circumference portions including portions forming lips, the rod groove being arranged to receive a rod between said lips, and wherein the circumference portions are arranged to lie against the rod, and wherein the second molding defines a slider piece which forms at least part of the circumference portions; and
wherein the slider piece of the second plastic material has portions which engage the rod which comprise a bottom portion of the rod groove, and wherein the slider piece is non-homogenous, such that the material forming the bottom portion of the rod groove has a lower coefficient of friction than all other circumference portions.
7. The rod cradle of claim 6 wherein the lips edging the rod groove are of the first plastic material.
8. The rod cradle of claim 7 wherein the slider piece is polyurethane.
9. The rod cradle of claim 6 , wherein the insert-molded slider piece forms all the circumference portions and also has portions forming a liquid groove contiguous with the rod groove.
10. The rod cradle of claim 6 wherein the slider piece is polyurethane filled with a substance that reduces friction.