Grooving Tool Positioning for Variable Cardboard Grooves
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Solution Overview
Problem
Existing cardboard grooving machines are limited in producing diverse and flexible groove configurations, as they can only create continuous parallel grooves with constant cross-sections, failing to meet the design requirements for laminated cardboard folding box constructions that need variable and angled grooves.
Innovation Solution
A grooving device with a guide element that can be moved relative to the transport drum and driven by a controllable drive means, allowing for adjustable axial and radial positioning of grooving tools, enabling the creation of non-continuous, angled, and variable cross-section grooves, and allowing grooves to be cut with a pneumatic cylinder or electric motor control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If stationary groove cutting tools are used on fixed holders, then the device structure is simple, but only continuous parallel grooves with constant cross-section can be produced, limiting design flexibility
Solution Approach 1:
The guide element is designed to be movable relative to the transport drum, allowing dynamic adjustment of the groove cutting tool's position. This enables the tool to be moved radially to change groove depth and axially to create interrupted or angled grooves, transforming a static system into a dynamic one that can produce varied groove configurations
Solution Approach 2:
The movable guide element serves multiple functions: it positions the groove cutting tool radially to control groove depth, moves axially to create interrupted grooves, and enables angled groove cutting. This single component replaces what would otherwise require multiple separate mechanisms, achieving multi-functionality while controlling overall device complexity
2Adaptability or versatility
If the groove cutting tool is fixed at a constant distance from the transport drum, then the device is simple to operate, but grooves with variable cross-section cannot be produced
Solution Approach 1:
The guide element enables dynamic radial movement of the groove cutting tool relative to the transport drum. This allows the distance between the tool and drum to be changed during operation, creating grooves with variable cross-sections while maintaining operational simplicity through automated or semi-automated control mechanisms
3Manufacturing precision
If manual positioning of knife holders is used, then the device structure is simple, but precise and repeatable groove positioning is difficult to achieve
Solution Approach 1:
Manual mechanical positioning of the knife holder is replaced with a drive means that automatically moves the guide element along the transport drum. This substitution of manual operation with an automated mechanical or electrical drive system achieves precise and repeatable groove positioning while maintaining reasonable device complexity
Data Source
Figure 1~3
Figure 4
Figure 5a~5b
AI summary
The device (1) has several endlessly around rollers (54) that are surrounded and spaced apart from each other. The transport drum (11) is provided with an inlet (14) and an outlet (15) such that paperboard blanks (2) are conveyed to the drum casing through belt (51). The groove cutting tools (72,72',72'') are positioned between the belt on circumference of transport drum. The groove cutting tool is moved relative to transport drum during operation of grooving of drive unit (79) to drive guide elements (78,80). An independent claim is included for method for grooving paperboard blank.