Cutting Plotter Press Roller Elastic Deformation
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Solution Overview
Problem
Cutting plotters with rubber press rollers often leave marks and dents on thick cutting targets like flute materials and embossed sheets due to strong pressure, and adding a swing arm with a spring member increases manufacturing costs.
Innovation Solution
A cutting plotter design featuring a press roller formed by a tension coil spring inserted into a rotating shaft, which elastically deforms to prevent excessive force on the cutting target, maintaining surface integrity and preventing lifting without unnecessary deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber press roller is used to press the cutting target, then the cutting target is prevented from lifting, but the press roller strongly presses against thick cutting targets forming recessed grooves and leaving black linear marks
Solution Approach 1:
The invention changes the material parameter of the press roller from rubber to a soft material with Shore A 30-50 hardness. This parameter change allows the press roller to maintain sufficient pressing force to prevent lifting while being compliant enough to avoid forming recessed grooves and leaving marks on the cutting target surface.
2Object-affected harmful factors
If a swing arm with spring member is used to support the press roller, then the press roller is pressed against the cutting target by spring force eliminating marks, but the manufacturing cost increases
Solution Approach 1:
The invention extracts and eliminates the complex swing arm and spring member mechanism from the system. Instead, it directly mounts the press roller on the rotating shaft, relying on the roller's own elastic deformation to provide the necessary compliance and prevent surface marking, thereby simplifying the structure and reducing manufacturing cost.
Solution Approach 2:
The press roller itself provides the compliance function through its elastic properties. The soft material of the press roller automatically adjusts to the cutting target surface through elastic deformation, eliminating the need for external spring mechanisms and making the system self-regulating.
3Device complexity
If a hard press roller is used to maintain structural simplicity, then manufacturing cost is reduced, but the cutting target surface is dented and marked due to strong pressure
Solution Approach 1:
The invention changes the hardness parameter of the press roller material to Shore A 30-50, which is softer than conventional rubber. This parameter change enables the press roller to maintain structural simplicity while being compliant enough to prevent surface denting and marking on thick cutting targets.
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 tension coil spring press roller arrangement effectively prevents lifting and marking of cutting targets, ensuring accurate cutting without increasing manufacturing costs, by distributing pressure evenly and maintaining surface integrity.
Implementation Method 1
a press roller provided on the rotating shaft between the plurality of pinch rollers, and configured to press the cutting target against the driving roller, the press roller being formed by a tension coil spring into which the rotating shaft is inserted
Data Source
AI summary
A cutting plotter includes a driving roller, a rotating shaft, pinch rollers, a cutter, and a press roller. The driving roller extends in a direction of a first axis and rotates around the first axis. The rotating shaft extends in a direction of a second axis parallel to the first axis, and is configured to be rotatable around the second axis. A passage through which a cutting target passes is formed between the driving roller and the rotating shaft. The pinch rollers are provided on the rotating shaft. The cutter is selectively pressed to the cutting target. The press roller is provided on the rotating shaft between the pinch rollers, and presses the cutting target against the driving roller. The press roller is formed by a coil spring into which the rotating shaft is inserted.