Two-Shot Injection Molded Floor Tile Vent Hole Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional modular plastic tiles face challenges in manufacturing tiles that are multi-colored, non-slip, and can withstand heavy loads without requiring a nonslip sheet, while also being cost-effective and easy to assemble.
Innovation Solution
The use of a two-polymer compound system where a first polymer compound forms the base of the tile, and a second polymer compound is overmolded onto the surface to create non-slip pads and support members, with a vent hole system to prevent voids and enhance adhesion, allowing for different colors and increased friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single uniform color is used for the tile, then manufacturing is simple and cost-effective, but aesthetic appeal and design versatility are limited
Solution Approach 1:
The tile is segmented into multiple color zones through the injection molding process, with different polymer compounds or pigments injected into different cavities or regions of the mold. This allows each tile to contain multiple colors (e.g., black and red patterns) while still being manufactured as a single integrated piece, maintaining manufacturing efficiency while achieving aesthetic versatility
Solution Approach 2:
The manufacturing process changes the color parameter by injecting polymer compounds with different pigments or colors into different regions of the tile mold. This allows the same manufacturing process to produce tiles with varied color patterns and designs, enhancing aesthetic appeal without complicating the basic molding operation
2Productivity
If conventional single-color injection molding is used, then manufacturing is quick and inexpensive, but multi-color patterns cannot be achieved
Solution Approach 1:
The mold is segmented into multiple injection zones or cavities that receive different colored polymer compounds simultaneously or in sequence. This segmentation allows multi-color tiles to be produced in a single molding cycle, maintaining high productivity while achieving color variety
Solution Approach 2:
The mold is pre-configured with multiple gate positions and cavity arrangements that accommodate different colored polymers before injection begins. This preliminary setup enables the molding process to produce multi-color tiles without requiring post-manufacturing assembly or additional processing steps, preserving manufacturing speed
3Reliability
If rubber inserts are separately molded and physically inserted, then cushioning characteristics are achieved, but manufacturing time and cost increase significantly
Solution Approach 1:
The cushioning rubber elements are merged with the plastic tile body into a single integrated component through co-molding or insert molding techniques. The rubber material is injected into the mold cavity along with or after the plastic substrate, allowing both materials to form a unified tile structure in one manufacturing cycle, thereby achieving cushioning properties without the time and cost of separate assembly
Solution Approach 2:
The tile is manufactured as a composite structure combining plastic substrate material with rubber cushioning material. The injection molding process is modified to accommodate multiple materials, injecting the rubber compound into specific regions of the mold to create integrated cushioning elements that are permanently bonded to the plastic base, eliminating separate assembly operations
4Reliability
If tiles require a rubber sheet substrate for stability, then non-slip characteristics are achieved, but installation complexity and material requirements increase
Solution Approach 1:
The non-slip characteristic is applied locally to the tile surface through injection-molded textured patterns, raised ribs, or rubberized coatings that are integrated into the tile structure. These local modifications provide friction and grip where needed without requiring a separate rubber sheet substrate, simplifying installation while maintaining stability
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
This approach enables the creation of modular tiles that are aesthetically pleasing, non-slip, and capable of withstanding heavy loads, while being cost-effective and easy to manufacture, with improved adhesion and structural integrity.
Implementation Method 1
The vent hole permits gas or other fluid to be displaced out of the upper feature cavity, thereby obviating or minimizing any void in the as-molded upper feature which might otherwise occur.
Implementation Method 2
During the injection of the second polymer compound, molten polymer makes its way from the gate, through the through hole and into the cavity in which the upper feature will be created.
Data Source
AI summary
A modular plastic floor tile has a body of a first polymer compound and at least one upper feature overmolded onto an upper surface of the body from a second polymer compound which is injected from a gate adjacent the lower surface of the body. At least one through-hole communicates the gate to the upper feature. At least one vent hole, spaced from the through-hole, communicates the upper feature to the lower surface of the body. The vent hole allows any gas in the polymer flow path to be displaced from the upper feature, thereby preventing or minimizing defects that can affect adhesion and appearance.