Composite Support Body for Extended Nip Pressure Control
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Solution Overview
Problem
Rigid support bodies in paper making machines are inflexible and cause pressure profile issues, leading to inefficient dewatering and excessive wear, while flexible support bodies are less robust and have a shorter lifespan.
Innovation Solution
A support body comprising a base body made of a rigid material, such as metal, and a cover body made of a polymer, which is elastically deformable, allowing for a flexible and durable nip formation with precise pressure adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a rigid support body is used, then the support body is robust and has long lifespan, but it causes excessive wear on components and cannot achieve desired pressure profile
Solution Approach 1:
The support body is designed with non-uniform hardness distribution: the base body is made of rigid metal for structural strength, while the cover body is made of softer polymer material that contacts the web. This local quality differentiation allows the rigid base to provide longevity while the softer cover minimizes wear on adjacent components and enables pressure profile adjustment through elastic deformation.
Solution Approach 2:
The support body combines two different materials with complementary properties: a rigid metallic base body (providing robustness and longevity) and a flexible polymer cover body (providing wear resistance and pressure adjustability). This composite structure resolves the contradiction by allowing each material to fulfill its optimal function - the metal ensures long lifespan while the polymer minimizes wear.
2Object-affected harmful factors
If a flexible support body is used, then the desired pressure profile can be achieved and wear is minimized, but the support body is less robust and has shorter lifespan
Solution Approach 1:
The support body is designed with non-uniform hardness distribution: the base body is made of rigid metal for structural strength, while the cover body is made of softer polymer material that contacts the web. This local quality differentiation allows the rigid base to provide longevity while the softer cover minimizes wear on adjacent components and enables pressure profile adjustment through elastic deformation.
Solution Approach 2:
The support body combines two different materials with complementary properties: a rigid metallic base body (providing robustness and longevity) and a flexible polymer cover body (providing wear resistance and pressure adjustability). This composite structure resolves the contradiction by allowing each material to fulfill its optimal function - the metal ensures long lifespan while the polymer minimizes wear.
3Stability of the object's composition
If a rigid support body is used, then the support body is stable and durable, but it cannot adjust the extended nip and achieve efficient dewatering
Solution Approach 1:
The support body is designed with non-uniform hardness distribution: the base body is made of rigid metal for structural strength, while the cover body is made of softer polymer material that contacts the web. This local quality differentiation allows the rigid base to provide stability while the softer cover enables pressure profile adjustment through elastic deformation, improving dewatering efficiency.
Solution Approach 2:
The support body combines two different materials with complementary properties: a rigid metallic base body (providing stability and durability) and a flexible polymer cover body (providing pressure adjustability for efficient dewatering). This composite structure resolves the contradiction by allowing each material to fulfill its optimal function - the metal ensures stability while the polymer enables productivity improvement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The combination of a rigid base body and flexible cover body provides enhanced durability and stability, minimizing wear on components while achieving the desired pressure profile for efficient dewatering.
Implementation Method 1
the first material that is a polymer... the first material is rendered soft and flexible enough to be able to function as a flexible support body and form the elongated nip
Data Source
AI summary
The present invention relates to a support body (50) for a paper machine having an extended nip formed between the support body and a counter-pressure member, wherein the support body comprises—a base body (51) comprising an upper surface facing in the first direction, —a cover body (52) comprising a working surface (15) for forming an extended nip with a counter-pressure member, wherein the cover body (52) is mounted on the upper surface of the base body (51) such that the working surface faces in the first direction, and wherein the cover body (52) comprises a first material, said first material being a polymer. The invention also relates to a paper machine comprising a support body (50).