Paper Wrapping Device for Pallet Stringers
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Solution Overview
Problem
Existing methods for producing support members, such as those used in pallets, face challenges in achieving high-quality, cost-effective mass production with repeatable and accurate dimensions, particularly when replacing wood articles.
Innovation Solution
A paper wrapping device that includes a conveying unit, a forming unit with rotating winding arms, and a bonding agent application system, which winds and secures corrugated paper into elongated support members with a core and multiple wrapped layers, allowing for efficient production of support members with precise dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wood articles are used as support members, then durability is improved, but weight increases and transportation costs increase
Solution Approach 1:
The patent changes the material parameter from wood to corrugated paper, fundamentally altering the density and weight characteristics while maintaining structural functionality. The support member is formed by wrapping corrugated paper around a core and bonding it to create a hollow cylindrical structure that achieves high strength-to-weight ratio
Solution Approach 2:
The support member is constructed as a composite structure with a central core (wooden or otherwise) and an outer layer of corrugated paper wrapped and bonded around it. This composite construction combines the durability of the core with the lightweight properties of paper, achieving both longevity and reduced weight
2Strength
If wood articles are used as support members, then strength is improved, but manufacturing precision and dimensional consistency deteriorate
Solution Approach 1:
The patent replaces traditional mechanical woodworking processes with a wrapping and bonding system. The support member is formed by mechanically wrapping corrugated paper around a core and using bonding agents to secure it, allowing for more consistent dimensional control through the wrapping process rather than cutting and shaping wood
Solution Approach 2:
The invention changes the formation process from cutting and assembling wood pieces to wrapping a continuous or semi-continuous sheet of corrugated paper around a core. This process inherently provides better dimensional consistency and repeatable dimensions compared to traditional wood fabrication methods
3Weight of moving object
If corrugated paper is used to replace wood, then weight is reduced, but structural stability deteriorates
Solution Approach 1:
The support member is constructed as a composite with a central core providing structural stability and an outer layer of corrugated paper providing lightweight protection. The core can be wooden or another stable material that prevents warping and maintains structural integrity while the paper wrapping reduces overall weight
Solution Approach 2:
The support member is formed as a hollow cylindrical structure by wrapping corrugated paper around a core. The curved, cylindrical geometry provides inherent structural stability and resistance to buckling, while the hollow construction reduces weight compared to solid wood members of equivalent strength
4Ease of manufacture
If traditional wood pallet construction is used, then ease of manufacture is improved, but productivity and mass production efficiency deteriorate
Solution Approach 1:
The support member can be formed from a continuous or semi-continuous sheet of corrugated paper that is wrapped around a core in a continuous process. This continuous formation method enables high-speed production and mass manufacturing, significantly increasing productivity compared to assembling discrete wood pieces
Solution Approach 2:
The patent replaces traditional mechanical assembly processes (nailing, screwing, or stapling wood pieces together) with a wrapping and bonding process. The bonding agent application system and wrapping mechanism enable rapid formation of support members, dramatically increasing manufacturing efficiency and productivity
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 device enables rapid and efficient production of high-quality support members with consistent dimensions, offering a cost-effective alternative to wood articles by utilizing corrugated paper, which are strong, stable, and suitable for various applications, including pallet construction.
Implementation Method 1
a bonding agent application device that selectively applies an adhesive to desired portions of the paper prior to winding
Data Source
AI summary
A device for processing sheets, rolls or the like, preferably sheets or rolls of corrugated paper, into useful articles. More specifically, the invention relates to a paper wrapping device that can convert a sheet or strip of paper into a useful article comprising a plurality of wrapped paper layers, suitable for use as a support member or a pallet stringer. Also the invention provides a device that contains a conveying unit which transfers a material, such as paper, to a forming unit which produces a core layer and further wraps additional layers in a clockwise or counterclockwise direction around said core in one or more layers to form a support member having a solid wrap of continuous layers.