Spray Dispenser With Bent Feed Channels For Compact Mixing
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Solution Overview
Problem
Existing spray dispensers for multiple components face challenges in producing complex supply ducts with precise, parallel outlet openings, which complicates manufacturing and demolding, leading to a non-compact design and inefficient mixing of products.
Innovation Solution
A spray dispenser design featuring straight feed channels that can be easily bent and molded in a simple tool structure, with outlet openings aligned on slides or masks, allowing for a compact and cost-effective production process, and an adjuster part for varying mixing ratios through radial projections and a push button mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If outlet openings are aligned parallel for high spray cone overlap, then mixing effectiveness is improved, but feed channels become complex and difficult to manufacture
Solution Approach 1:
The feed channel is divided into two separate components: a straight section that is injection-molded with the pump head, and a separate bent section (arched bracket) that is attached later. This segmentation allows each part to be manufactured independently using simple processes, avoiding the need for complex molded feed channels while achieving the required parallel outlet alignment.
Solution Approach 2:
A bent section (arched bracket) serves as an intermediary element connecting the straight feed channel from the pump head to the outlet openings. This intermediary component enables the transition from the symmetric pump head arrangement to the parallel outlet configuration without requiring complex integrated molding.
2Shape
If feed channels are bent to connect symmetric pump heads to parallel outlets, then outlet alignment is achieved, but production complexity and demolding difficulty increase
Solution Approach 1:
The feed channel is segmented into a straight injection-molded part and a separate bent section. The straight section is easily manufactured with simple molds, while the bent section is added separately to achieve the required orientation without complicating the molding process or demolding operations.
Solution Approach 2:
The straight feed channel is pre-formed during injection molding of the pump head, and the bent section is subsequently attached. This preliminary formation of the straight channel avoids the need for complex molded features, simplifying both the mold structure and demolding process while still achieving the final parallel outlet configuration.
3Volume of moving object
If outlet openings are positioned close together for compact design, then device compactness is improved, but spray cone overlap and mixing may be insufficient
Solution Approach 1:
The outlet openings are positioned close together in the horizontal plane to achieve compactness, while the bent feed channel sections provide the necessary spatial routing to ensure proper spray cone overlap. This dimensional arrangement allows both compact design and effective mixing to be achieved simultaneously.
Data Source
AI summary
For creating a simplified and cost effective spray dispenser for plural components, in particular for an adjustable dispenser having a compact design, wherein outlet openings are provided at a respective supply channel each having a pump unit for each component, it is proposed to form the respective supply channel (4a, 4b) as straight element at manufacturing (FIG. 8), especially by injection molding and then bend it into a curved form on assembly (FIG. 9) in the spray dispenser (1).