Adjustable Creasing Roll Mechanism for Corrugated Sheet Folding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional creasing devices fail to accurately form creases in corrugated sheets due to uneven resistance, leading to potential cracking or insufficient pressure, making it difficult to fold sheets with high precision.
Innovation Solution
A creasing device with individually adjustable distances between male and female creasing rolls, using positioning means such as pivoting roller arms or eccentric bearings, allows for independent adjustment of creasing pressures across multiple units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the distances between the rolls are increased to prevent cracking in low-resistance areas, then cracking is prevented, but crease formation fails in high-resistance areas
Solution Approach 1:
The creasing device is divided into multiple independent creasing units (first, second, third, and fourth creasing units), each with its own adjustable roll distance mechanism. This allows each unit to be independently adjusted according to the local resistance characteristics of different areas of the corrugated sheet, preventing both cracking in low-resistance areas and ensuring proper crease formation in high-resistance areas.
Solution Approach 2:
Each creasing unit can be adjusted to provide different pressing forces locally. The first and third creasing units (which crease high-resistance areas) are adjusted to provide stronger pressing force, while the second and fourth creasing units (which crease low-resistance areas) are adjusted to provide gentler pressing force to prevent cracking. This local quality adjustment resolves the contradiction between preventing cracking and ensuring proper crease formation.
2Device complexity
If the distances between the rolls are adjusted simultaneously by the same amount, then the device structure is simple, but it cannot accommodate varying resistance across different sheet areas
Solution Approach 1:
The adjustment mechanism is segmented into four independent units, each capable of being adjusted separately. This segmentation increases adaptability to varying sheet resistance across different areas, while each individual unit maintains a relatively simple adjustment structure, balancing overall device complexity with versatility.
Solution Approach 2:
The device transitions from a static, uniform adjustment system to a dynamic, independently adjustable system. Each creasing unit can be adjusted according to the specific requirements of different sheet areas, making the device adaptable to varying resistance conditions while maintaining operational simplicity through standardized adjustment mechanisms.
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
Enables precise formation of creases in sheets of varying thicknesses, preventing cracking and ensuring accurate folding by allowing tailored creasing pressures for each crease, resulting in high-dimensional accuracy of folded boxes.
Implementation Method 1
creases are formed in the sheet by pressing ribs formed on the outer periphery of the male creasing rolls against the sheet
Implementation Method 2
at least one of the upper and lower rotary shafts has both ends thereof rotatably supported by eccentric bearings, whereby by rotating the eccentric bearings and thus rotating the axis of the one of the rotary shafts, the distances between the axes of the upper and lower rotary shafts is adjustable
Data Source
AI summary
It is desired to provide a creasing device of which the distances between rollers of a plurality of creasing units are individually adjustable.A plurality of creasing units 40 each comprising a female creasing roll 41 and a male creasing roll 42 provided thereunder are provided so as to be positionable in a direction perpendicular to the feed direction of a corrugated sheet S0. As many roller arms 43 as the creasing units 40 are provided so as to be pivotable about a common first drive shaft 31. Each roller arm 43 rotatably supports one of the male creasing rolls 42. By pivoting each roller arm 43 with a pivoting means 45, the male creasing roll 42 is moved relative to the corresponding female creasing roll 41, thereby adjusting the distance between the rolls.