Centrifugal Preform Alignment Device for High-Speed Manufacturing
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Solution Overview
Problem
Existing preform alignment and straightening devices are bulky, prone to oscillation, and require complex and costly guide parts, leading to potential blockages and extended downtime when switching between different preform models, which affects the efficiency and cost-effectiveness of high-speed container manufacturing.
Innovation Solution
A centrifuge bowl-based device with a rotating turntable and peripheral railing system that aligns and straightens preforms by centrifugal force, using a radial gap and support rail to stabilize the preforms, allowing them to roll without slipping, and a conveyor system for efficient transfer, with adjustable components for different preform models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional alignment and straightening devices with long rollers are used, then preforms can be effectively aligned and straightened, but the device becomes very bulky and requires large vertical space
Solution Approach 1:
The patent replaces the traditional mechanical gravity-based alignment system with a centrifugal force-based system. The centrifuge uses rotational motion to generate centrifugal force that aligns and straightens preforms, eliminating the need for long vertical rollers and reducing device height significantly.
Solution Approach 2:
The patent changes the physical parameter used for alignment from gravity (vertical force) to centrifugal force (radial force). By rotating the centrifuge at controlled speeds, the alignment effect is achieved through centrifugal force acting on the preforms, allowing compact device design.
2Stability of the object's composition
If complex guide parts are used to stabilize preforms during straightening, then preform guidance is improved, but device complexity and cost increase
Solution Approach 1:
The preforms self-align and self-stabilize through the centrifugal force field and the simple geometric constraints of the centrifuge bowl and peripheral railing. No complex active guidance systems are needed - the preforms naturally orient themselves radially outward during rotation.
Solution Approach 2:
The centrifuge bowl uses curved surfaces and radial geometry to naturally guide and stabilize preforms. The peripheral railing and curved bottom surface work together to constrain preform movement, providing stability through geometric design rather than complex mechanical guides.
3Manufacturing precision
If fixed guide parts are used for specific preform models, then alignment precision is improved, but adaptability to different preform models decreases and downtime increases
Solution Approach 1:
The centrifuge design with adjustable peripheral railing and controllable rotation speed can handle multiple preform models and sizes. By adjusting the railing position and rotation parameters, the same device effectively aligns different preform types without requiring model-specific guide parts.
Solution Approach 2:
The device uses dynamic parameters (rotation speed, railing position) that can be adjusted for different preform models. This dynamic adaptability replaces fixed, model-specific guide parts, allowing quick reconfiguration between different preform types without downtime.
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 provides a compact, efficient, and cost-effective alignment and straightening process that minimizes oscillation and downtime, enabling stable guidance of preforms through all stages, ensuring continuous operation and adaptability to various preform models without complex guide parts.
Implementation Method 1
The preforms are then projected by centrifugal force against a peripheral railing. Under the effect of centrifugal force, the preforms are thus aligned at the periphery of the bowl, with their main axis arranged in a substantially radial orientation with respect to the center of the bowl.
Implementation Method 2
the preforms are rotated about their main axis by friction against an outer edge of the turntable, the preforms thus being moved around the bowl in the direction of rotation of the turntable, by rolling against the peripheral railing.
Data Source
Figure 1~3
Figure 4~13
Figure 14~15
AI summary
The invention relates to a method for aligning preforms (12) in a row and righting same, said method being intended for use with axisymmetric preforms (12) having an annular supporting face (18). The method comprises: a first step of discharging preforms (12) in bulk onto a rotating horizontal platen (24); a second step of aligning the preforms (12) against a fixed peripheral rail (28) by means of the centrifugal force produced by the rotation of the rotating platen (24); a third step of successively righting the aligned preforms (12) by tilting the preform bodies (14), performed under the annular supporting face (18). The method is characterised in that, during the second alignment step, the main axis (A) of the preforms (12) is oriented essentially tangentially to the direction of movement. The invention also relates to a device (10) for carrying out said method.