Rotating Lance Adhesive Applicator with Internal Feed Lines
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Solution Overview
Problem
Existing devices for applying two-component adhesives or sealants are inflexible due to the inability to rotate the lance about its longitudinal axis, which limits their use in applications involving curved applicator nozzles, especially when integrated with robots.
Innovation Solution
The device incorporates rotary feedthroughs for introducing components into the material feed channels, allowing the lance to rotate within a stationary housing, with a mixing device and application nozzle attached to the lance tip, and includes a flushing medium feed channel for residue removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lance is made stationary to prevent feed lines from winding around it, then the feed lines remain organized and manageable, but the applicability to curved surfaces and robotic integration is limited
Solution Approach 1:
The feed lines are routed through the hollow interior of the lance body, nesting the feed lines within the lance structure itself. This eliminates the problem of external feed lines winding around the lance during rotation, while maintaining the ability of the lance to rotate freely about its longitudinal axis.
Solution Approach 2:
The feed lines transition from an external arrangement (outside the lance) to an internal arrangement (through the lance hollow space). This dimensional reorganization allows the lance to rotate without creating tangled external feed lines, solving the contradiction between rotatability and feed line management.
2Manufacturing precision
If pressure-actuated needle valves are used for precise material control, then the adhesive flow is precisely controlled, but additional pressure medium supply lines are required which complicate the rotary feedthrough system
Solution Approach 1:
The pressure medium supply lines are integrated into the existing rotary feedthrough structure that already handles adhesive component supply. The same rotary feedthrough mechanism serves dual purposes: supplying adhesive components and supplying pressure medium, thereby combining multiple functions into a single structural solution.
Solution Approach 2:
The rotary feedthrough is designed as a multi-functional component that simultaneously handles the rotation of the lance and the supply of both adhesive components and pressure medium. This universal design eliminates the need for separate external pressure medium supply lines, reducing overall system complexity while maintaining precise flow control.
Data Source
Figure 1
Figure 2a~2c
AI summary
The invention relates to a device (10) for applying a pasty mass having an at least two-component, curable adhesive or sealant, comprising a housing (12), a lance (14), which is accommodated in the housing (12) and can be rotated about a longitudinal housing axis and in the interior of which a material supply channel (20) extends to a lance tip (16) bounding the lance (14) in the axial direction for each component of the adhesive or sealant, and a rotary feed-through (26) for introducing the component of the adhesive or sealant into the respective material supply channel (20) through a jacket (30) of the housing (12), wherein a closing valve (24) is associated with each material supply channel, which closing valve can close the material supply channel (20) at a valve seat (22).