Severing Device for Folding Boxes with Segmented Conveying
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Solution Overview
Problem
Existing severing devices for cardboard piles cause quality defects and increased waste due to pressure marks on the bottom sheet during the severing process, leading to higher production costs.
Innovation Solution
A severing device with a support system comprising broad belts and movable lower pressing members that spread pressure evenly, allowing frangible lines to be severed without marking the bottom sheet, and a control unit to manage the severing process efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If narrow rollers are used to convey the cardboard pile, then the pile can be moved in the conveying direction, but pressure marks are caused on the bottom sheet leading to quality defects
Solution Approach 1:
The conveying system is segmented into multiple independent conveying members (rollers) that can be individually controlled. Each roller can be independently actuated to apply or release pressure, allowing the pile to be conveyed without continuous pressure on the bottom sheet. This segmentation enables precise control of pressure application to avoid marks while maintaining conveying capability.
Solution Approach 2:
The conveying members are designed to be dynamically controllable, moving between an operational position for conveying and a retracted position to avoid marking the bottom sheet. The system transitions between different pressure states (pressing vs. clear position) depending on the operational phase, dynamically adapting to prevent harmful pressure marks during non-conveying periods.
2Stability of the object's composition
If continuous pressure is applied to immobilize the pile during severing, then the pile remains stable, but marks are caused on the bottom sheet increasing waste
Solution Approach 1:
The pressing members operate periodically, applying pressure to the pile only during the specific phase when severing occurs, then moving to a clear position. This periodic action pattern (immobilizing position during severing, clear position otherwise) provides stability when needed while avoiding continuous pressure that would cause marks and waste on the bottom sheet.
Solution Approach 2:
The harmful pressure application is extracted and isolated to only the necessary moment during the severing process. The pressing members are retracted from the bottom sheet area during non-severing phases, removing the source of pressure marks and waste generation while maintaining pile stability during the critical severing operation.
3Object-affected harmful factors
If multiple conveying members are used to spread pressure, then marking is minimized, but device complexity increases
Solution Approach 1:
Each conveying member is designed to perform multiple functions: conveying the pile, applying localized pressure during severing, and retracting to avoid marking. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing device complexity while achieving pressure distribution and mark prevention.
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
The solution effectively minimizes the risk of marking the bottom sheet, reduces waste, and simplifies the severing process by allowing multiple frangible lines to be cut at different positions, thereby lowering production costs and improving product quality.
Implementation Method 1
a belt extending parallel to the conveying direction and configured to drive the pile in the conveying direction
Implementation Method 2
at least one rotary pinion configured to drive the belt in a belt circuit
Implementation Method 3
the lower pressing member applies pressure to the undersides of the conveying members so that the conveying members immobilize the pile
Data Source
AI summary
This severing device (1) includes an upper pressing member (2), a pile support part (4) having a plurality of conveying members (10) for conveying the pile in a conveying direction (X), a lower pressing member (6) arranged under the conveying members (10). The conveying members (10) are juxtaposed in a transverse direction. Two juxtaposed conveying members can be parted. The lower pressing member (6) has: i) two adjacent lower plates (6.1, 6.2) that can be moved apart, and ii) a lower translation actuator (6.3) for moving the lower plates (6.1, 6.2) so as to cause the severance slot (2.0) between juxtaposed conveying members to coincide with a frangible line in the plate.