Method of lining inner wall surfaces of hollow articles
First Claim
1. A method of lining the inner wall surface of a hollow article with an inner lining material, which comprises:
- a step (a) of emplacing the lining material within the hollow article to confront the inner surface thereof;
a step (b) of causing the temperature of the hollow article to be higher than that of the lining material thereby to increase the gap therebetween either prior to or after the step (a);
a step (c) of applying an expanding force to the lining material thus emplaced thereby to cause the same to undergo plastic expansion deformation and to fit intimately against said inner surface; and
thereafter a step (d) of causing the temperature of the hollow structure to become lower than that of the lining material thereby to produce an even tighter fit between the hollow structure and the lining material due to interference.
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Accused Products
Abstract
The inner surface of a hollow article of special shape such as a pipe elbow or bellows is lined with a tightly fitted protective lining material by the steps of emplacing the lining material within the hollow article to confront the inner surface thereof, causing the temperature of the hollow article to be higher than that of the lining material, applying an expanding force to the lining material thereby to cause it to undergo plastic expansion together with the hollow article, removing the expanding force, and causing the temperature of the hollow structure to become lower than that of the lining material thereby to produce a tight fit therebetween due to interference.
141 Citations
8 Claims
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1. A method of lining the inner wall surface of a hollow article with an inner lining material, which comprises:
- a step (a) of emplacing the lining material within the hollow article to confront the inner surface thereof;
a step (b) of causing the temperature of the hollow article to be higher than that of the lining material thereby to increase the gap therebetween either prior to or after the step (a);
a step (c) of applying an expanding force to the lining material thus emplaced thereby to cause the same to undergo plastic expansion deformation and to fit intimately against said inner surface; and
thereafter a step (d) of causing the temperature of the hollow structure to become lower than that of the lining material thereby to produce an even tighter fit between the hollow structure and the lining material due to interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a step (a) of emplacing the lining material within the hollow article to confront the inner surface thereof;
Specification