Bell cup and rotary sprayer including such a bell cup

JP2024538222A5Pending Publication Date: 2025-11-04DUERR SYSTEMS GMBH
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Patent Information

Application Number
JP2024523946
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-10-20
Filing Date
2022-10-19
Publication Date
2025-11-04

AI Technical Summary

Technical Problem

Existing rotary atomizers for painting automobile body parts face issues such as contamination of fine threads leading to imbalance and bearing failure, risk of tilting, loosening due to mechanical inertia, and paint residue transfer between colors, necessitating improved fixation and cleaning methods.

Method used

A bell cup design with a clamping connection that includes a hub part and spray body, featuring an annular clamping surface, centering cones, and an external rinsing chamber for efficient cleaning, along with a clamping ring system to secure the bell cup to the rotary atomizer, ensuring axial clamping and centering, and an annular rinsing channel for even distribution of rinsing agent.

Benefits of technology

The clamping connection provides secure fixation, prevents paint residue transfer, and ensures efficient cleaning of the bell cup, reducing the risk of mechanical failure and improving operational reliability.

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Abstract

The present invention relates to a bell cup (1) for a rotary sprayer (10) for spraying a coating agent (e.g. paint), comprising a spray body (3) with an annular spray edge (4) for spraying the coating agent, a hub part (13) for mounting the bell cup (1) on a rotatable hollow shaft (11) of the rotary sprayer (10), and a fixing arrangement (17-20, 23, 24) for matingly fixing the bell cup (1) to the hollow shaft (11) of the rotary sprayer (10).Furthermore, the bell cup (1) according to the present invention has an outer rinsing chamber (9) for rinsing the outer peripheral surface (8) of the bell cup (1) with a rinsing agent, and an outer rinsing channel for supplying the rinsing agent, which is supplied from a rinsing agent supply inside the bell cup (1) and flows into the outer rinsing chamber (9) at its outlet opening.
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