Dispensing Head Segmentation for Clogging Prevention
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Solution Overview
Problem
Existing spray heads for pressurized cosmetic containers face challenges in achieving consistent droplet size, flow rate, and spray pattern, often leading to clogging and uneven product distribution, while also requiring aesthetically pleasing and scalable designs.
Innovation Solution
A dispensing head with a housing and engaging part that form a dispensing orifice with well-defined dimensions, allowing for adjustable angles and centring reliefs to optimize the spray pattern, and a design that accommodates a circular inner contour of varying diameters, enabling high flow rates and homogeneous sprays or foams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a deformable frustoconical part is used to close the dispensing orifice, then the risk of clogging is reduced and the head can be closed after spraying, but the dispensing orifice cannot have well-calibrated dimensions and spray characteristics vary widely
Solution Approach 1:
The dispensing head is divided into separate functional components: a fixed body with a precisely formed dispensing orifice and a separate deformable closure member. The closure member (with frustoconical or spherical surface) segments the closing function from the orifice structure, allowing the orifice to maintain well-calibrated dimensions while the closure member independently performs the sealing action through deformation, thus preventing clogging without compromising dimensional precision.
2Strength
If bridges of material connect peripheral and central parts, then the structure is strengthened, but the flow of product is split into multiple jets and spray homogeneity is impaired
Solution Approach 1:
The harmful bridges of material connecting peripheral and central parts are completely removed from the design. Instead, the closure member is positioned to close the dispensing orifice from the front without any material bridges interrupting the product flow path. This extraction of the bridging structure eliminates the splitting of product flow into multiple jets, ensuring homogeneous spray composition while maintaining structural integrity through the closure member's positioning and deformation mechanism.
3Manufacturing precision
If the spray head is designed with complex features to control spray characteristics, then spray quality improves, but the design becomes less aesthetically pleasing and more difficult to manufacture at scale
Solution Approach 1:
Complexity is localized only where functionally necessary: the closure member has a specific frustoconical or spherical surface geometry optimized for deformation-based closing action. The body contains a precisely formed dispensing orifice with controlled dimensions. However, these localized complex features are integrated into an otherwise simple and elegant overall design that is aesthetically pleasing and suitable for large-scale production through standard molding techniques.
Data Source
Figure 1~4
Figure 5A~5C
Figure 6A~10
AI summary
Dispensing head (1) intended to be fitted on a container that contains at least one product to be dispensed, this dispensing head comprising: a body (3), an engaging part (10), in particular a core (10), that defines with the body (3), at rest, a dispensing orifice (12) having an annular section.