Molded-in Notches for Structural Member Drain Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Rotational molded plastic-hulled power boats face challenges in creating long, uninterrupted compartments with practical-sized hatches and watertight seams, as existing methods either destroy the compartment utility or require costly pre-fabricated decks, leading to water ingress and lack of structural support.
Innovation Solution
The use of molded-in notches in perimeter drain channels with independent structural members that extend beneath deck panels, providing structural support and a watertight seal, allowing water drainage without elaborate pre-fabricated decks, and using fasteners to secure these members to the plastic hull.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If compartment boundaries and drain channels are molded integrally with the hull, then labor savings and structural reinforcement are achieved, but the ability to create long uninterrupted compartments is lost
Solution Approach 1:
The drain channel is segmented into multiple sections, with each section corresponding to a different compartment. The channel includes a first section for a first compartment and a second section for a second compartment, allowing each compartment to maintain its full length while the integral molding process remains viable
Solution Approach 2:
The drain channel is positioned in a vertical dimension that extends above the deck level, allowing it to span across compartment boundaries without interfering with the horizontal continuity of the compartments. This vertical placement resolves the conflict between integral molding requirements and long compartment needs
2Reliability
If structural walls with drain channels are molded in, then water drainage is achieved, but compartment utility is destroyed
Solution Approach 1:
The drain channel is extracted from the traditional position within the compartment space and relocated to a vertical extension above the deck. This extraction allows the channel to perform its water drainage function while leaving the compartment interior completely clear and usable for storage of long items
Solution Approach 2:
The vertical section of the drain channel acts as an intermediary structure that connects the compartment interiors to the external drainage system without occupying compartment space. It mediates between the need for water drainage and the need for uninterrupted compartment utility
3Reliability
If pre-fabricated decks are used, then water tightness between seams is improved, but cost increases
Solution Approach 1:
The drain channel is merged with the hull structure through integral molding, eliminating the need for separate pre-fabricated deck assemblies. This consolidation maintains water tightness while reducing overall system complexity and cost
Solution Approach 2:
The molded-in drain channel structure serves multiple functions: it provides water drainage, reinforces the hull structure, and creates seamless transitions between compartments and deck areas, replacing multiple separate components that would be needed in conventional construction
Data Source
AI summary
An article of manufacture including molded-in notches in the peripheral edge of long, uninterrupted molded-in compartments in a rotational molded boat hull for permitting the flush fitting of certain independent structural members in said notches to provide both structural support and drainage of water away from seams between adjacent deck panels and hatches secured over the compartments without resorting to elaborate pre-fabricated decks. The article of manufacture includes a body, wherein the body is a plastic molded boat hull comprised of numerous molded-in cavities and molded-in features to create an interior layout that is comparable to a conventional boat built of aluminum or fiber reinforced plastic.