Rotary Head Wall Portion Suppresses Updraft
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Solution Overview
Problem
The rotation of a rotary head with suction nozzles in component mounting devices generates an updraft due to reduced pressure on the inner circumferential side, leading to dust and dirt being wound up and dispersed within the device, potentially adhering to components or boards, which affects mounting precision and cleanliness.
Innovation Solution
A rotary head design featuring an annular wall section on its lower surface, positioned near the suction nozzles, reduces pressure on the inner circumferential side, preventing updrafts and dust accumulation by minimizing pressure reduction during rotation, while ensuring the wall does not interfere with the suction nozzles or components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the rotary head rotates the suction nozzles, then component mounting efficiency is improved, but pressure reduction causes updraft that winds up dust and dirt
Solution Approach 1:
A wall portion is introduced as an intermediary structure between the suction nozzles and the internal environment of the rotary head. This wall portion blocks the path of the updraft generated by pressure reduction during rotation, preventing dust and dirt from being wound up and dispersed, while allowing the suction nozzles to continue rotating for efficient component mounting
2Object-affected harmful factors
If the wall portion is positioned close to the suction nozzles, then updraft suppression is improved, but interference with suction operation may occur
Solution Approach 1:
The wall portion is designed with localized positioning and specific dimensional characteristics. It is placed close to the suction nozzles to effectively block updraft, but its height and radial position are carefully controlled to create a local barrier that suppresses pressure reduction without interfering with the suction nozzles' ability to pick up components
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 design effectively suppresses the generation of updrafts and dust winding, maintaining cleanliness and improving mounting precision by maintaining uniform pressure distribution and preventing dust dispersion within the device.
Implementation Method 1
a reduction in pressure on the inner circumferential side of the plurality of suction nozzles caused by the revolving of the suction nozzles
Implementation Method 2
an updraft is generated by lowering pressure on an inner circumferential side of the plurality of suction nozzles
Data Source
AI summary
A rotary head includes a rotating body on which a plurality of suction nozzles that suck a component at a tip end are disposed in a circumferential direction, and revolves the plurality of suction nozzles by rotation of the rotating body, in which a wall portion with a wall surface along an axial direction of a rotary axis of the rotating body, is provided on a lower surface of the rotating body, and the wall portion is provided in the vicinity of an inner circumferential side of the plurality of suction nozzles such that a reduction in pressure on the inner circumferential side of the plurality of suction nozzles caused by the revolving of the suction nozzles is suppressed.