Tapered Pocketformer Flow Channel for Post-Tensioning
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Solution Overview
Problem
Prior art pocketformers fail to effectively accommodate tendon cutting devices and channel heat and metal particulates generated by plasma cutters, leading to accumulation and potential damage in post-tension anchor systems.
Innovation Solution
A pocketformer design with a tapered body and tubular member that channels heat and metal away from the anchorage system, easily fits over anchor ends, and accommodates tendon-cutting devices, featuring a polymeric material construction with support structures for rigidity and a circular lip for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional pocketformer is used without flow channels, then the structure is simpler and easier to manufacture, but heat and metal particulates from plasma cutting accumulate and cause damage to the anchorage system
Solution Approach 1:
The pocketformer body is segmented into functional zones including tapered flow channels that divide and direct the flow of heat and metal particulates away from the anchorage system, while maintaining a relatively simple overall structure
Solution Approach 2:
The flow channels convert the harmful accumulation of heat and metal particulates into a controlled flow pattern that directs these byproducts away from the anchorage system, utilizing the plasma cutting process itself to create the cooling and venting channels
2Strength
If the pocketformer body is made with thick walls for structural integrity, then strength is improved, but the device becomes heavier and more difficult to remove from hardened concrete
Solution Approach 1:
The pocketformer employs varying wall thicknesses in different locations - thicker walls in regions requiring structural integrity and thinner walls where weight reduction is prioritized, allowing optimization of both strength and removability
Solution Approach 2:
The asymmetric tapered geometry of the flow channels and body creates stress distribution patterns that enhance structural integrity while reducing overall material usage and weight
3Manufacturing precision
If the pocketformer is designed with complex support structures for rigidity, then manufacturing precision is improved, but the device becomes more complex and expensive to manufacture
Solution Approach 1:
The support structures are merged with the flow channel geometry, creating an integrated design where the same structural elements that provide rigidity also form the flow paths for heat and particulate management, reducing overall complexity
Solution Approach 2:
The pocketformer utilizes composite construction combining rigid support structures with flow channel features, allowing precise dimensional control while maintaining manufacturing efficiency through integrated molding techniques
Data Source
AI summary
A pocketformer for use with an anchor body in post-tensioning concrete has a body having a first side and a second side and a first end and a second end and an interior, a front face formed adjacent the first end, and a tubular member formed in the interior of the body. The first side tapers from the second end to the first end. The second side tapers from the second end to the first end. The first side has an angle of taper greater than an angle of taper of the second side. The body has a generally hollow interior. The tubular member extends from the first end to the second end within the interior of the body. The angle of taper of the first side is approximately 45°.