Structured Application Roller for Uniform Glue Distribution
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Solution Overview
Problem
Existing glue application rollers for wooden pencils lack uniformity in glue application due to smooth surfaces and material deformation, leading to uneven bonding and potential slippage.
Innovation Solution
A hollow-cylindrical application roller with structured outer and inner lateral surfaces, featuring regular intervals of depressions and projections, and a metal support element to prevent deformation, ensuring even glue distribution and secure fixation on the drive shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a smooth cylindrical surface is used for the application roller, then the roller can rotate freely, but the glue application becomes uneven due to material deformation and slippage
Solution Approach 1:
The roller surface is given different local properties: the outer lateral surface has a structured profile with projections and recesses for uniform glue distribution, while the inner lateral surface has grooves for driving shaft connection. This local differentiation resolves the contradiction by optimizing each surface for its specific function.
Solution Approach 2:
The roller surface is segmented into multiple functional zones: the outer surface is divided into projection and recess regions for glue application control, and the inner surface is segmented into groove sections for mechanical connection. This segmentation allows independent optimization of rotation freedom and application precision.
2Ease of operation
If a smooth inner surface is used for the driving shaft connection, then the roller can rotate freely, but slippage occurs due to insufficient connection
Solution Approach 1:
The inner lateral surface is given a specialized local quality with circumferential grooves that create mechanical interlocking with the driving shaft. This local structural modification maintains rotation freedom while preventing slippage through positive mechanical engagement.
3Ease of manufacture
If a hollow-cylindrical base body is used, then the roller structure can be optimized, but deformation occurs during application due to material flexibility
Solution Approach 1:
The roller is constructed as a composite structure with a hollow-cylindrical base body made of elastic material (rubber or plastic) that provides glue application properties, combined with a structured surface profile that maintains shape stability during operation. The composite nature allows both flexibility for glue transfer and structural integrity.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
The invention relates to an application roller (10, 110, 210, 310) for applying glue, in particular for applying glue to wooden boards (2a, 2b) in the manufacture of wooden pencils, with a hollow cylindrical base body (14, 114, 214, 314) which is rotatable about its longitudinal axis, in particular its central longitudinal axis (M), for applying the glue, wherein at least one lateral surface (16a, 16b, 116a, 116b, 216a, 216b, 316a, 316b) of the hollow cylindrical base body (14, 114, 214, 314) is structured, in particular at least one recess (18a, 18b, 118a, 118b, 218a, 218b, 318a, 318b) and/or at least has a lead (20a, 20b, 120a, 120b, 220a, 220b, 320a, 320b).