Paper Roll Clamping Device for Cutting Precision and Blade Protection
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Solution Overview
Problem
Existing paper cutting devices suffer from inaccuracies in cutting precision due to movement of roll sections and heat generation during cutting, leading to blade deformation and reduced blade life, with high energy consumption and paper contamination.
Innovation Solution
A clamping device that locks roll sections during cutting and opens them immediately after, minimizing heat exchange and preventing movement, using hydraulic actuators and synchronized control to maintain precision and reduce friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the clamping devices are moved away from each other during cutting to reduce friction, then the blade friction with paper is minimized, but the cutting precision deteriorates due to movement of roll sections and heat generation
Solution Approach 1:
The clamping devices dynamically adjust their position relative to the roll sections during different phases of the cutting cycle. During the cutting phase, they maintain a locked position to ensure precision, and after cutting, they move away to reduce friction and heat. This dynamic adjustment resolves the contradiction between maintaining cutting precision and reducing harmful friction/heat effects.
Solution Approach 2:
The clamping devices operate in periodic cycles: locking during cutting to maintain precision, then opening after cutting to reduce friction and heat generation. This periodic switching between locked and opened states allows the system to achieve both high cutting precision and minimal harmful thermal effects throughout the cutting process.
2Manufacturing precision
If the clamping devices remain locked during cutting to maintain precision, then cutting accuracy is improved, but heat generation increases causing blade overheating and deformation
Solution Approach 1:
The control system is programmed to open the clamping devices at the precise moment when cutting is completed, before significant heat transfer to the blade occurs. This preliminary action of opening the clamps timing-critically interrupts the heat exchange process while having already achieved the cutting precision benefit during the locked phase.
Solution Approach 2:
The system rushes through the cutting phase with clamps locked to achieve precision quickly, then immediately transitions to the opened state to minimize the duration of heat generation and contact. This rapid transition reduces the total time for heat accumulation, preventing blade overheating while maintaining cutting accuracy.
3Temperature
If the clamping devices are opened early to reduce heat contact, then blade overheating is reduced, but cutting precision deteriorates due to roll section movement
Solution Approach 1:
The control system uses feedback from the cutting cycle timing to determine when to open the clamping devices. By monitoring the cutting progress and blade position, the system opens the clamps at the optimal moment when cutting is complete but before significant heat transfer occurs, thus preventing both premature opening (which would reduce precision) and delayed opening (which would cause overheating).
Data Source
Figure 1~1a
Figure 2a
Figure 2b
AI summary
Device for locking two adjacent sections (1, 2) of a roll of paper (3) placed on the sides of a cutting section plane (4) defined by the movement of a cutting blade ( 5) of a cutting-off machine (M), comprising a pair of clamping devices (6, 7) configured to be able to assume an unlocking configuration with a locking configuration of respective sections (1, 2) of the roll (3); at least a first actuator (8) which can be operated on command to pass said clamping devices from the unlocking configuration to the locking configuration of the respective sections (1, 2), and vice versa; at least a second actuator (10) connected to the clamping devices (6, 7) and configured to perform a movement of reciprocal distancing of the clamping devices in a locking configuration with respect to said cutting section plane (4); means of inhibition (11) of the reciprocal moving away of the clamping devices active during the cutting advancement of the blade (5) through the roll (3); and activation means (12) of the second actuator (10) of the clamping devices (6, 7) configured to activate the reciprocal removal of the clamping devices immediately after the end of the roll cutting phase (3) performed by the blade (5).