Variable Height Mold for Slipform Paving
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Solution Overview
Problem
Existing slipform paving machines lack the capability to efficiently vary the height of molded structures during the molding process, particularly for applications like variable height concrete barriers and canal linings, where precise control over the profile and height is necessary.
Innovation Solution
A slipform paving machine equipped with a machine frame, height adjustable supports, an offset mold with actuators, and an external reference sensor system that allows for precise control of the mold form's position relative to the ground surface, enabling the creation of structures with variable heights and profiles based on user-defined profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional slipform paving machines are used with fixed mold forms, then the manufacturing process is simple, but the ability to create variable height structures is limited
Solution Approach 1:
The mold form is transformed from a fixed structure to a dynamic one through the integration of height adjustable supports with actuators. The mold form's position can be continuously adjusted during the paving operation to create variable height structures, directly resolving the contradiction between adaptability and complexity by making the system dynamic rather than static
Solution Approach 2:
The mold form assembly is designed to perform multiple functions: it can form both fixed height and variable height structures, and can adapt to different profile requirements. This multi-functionality increases adaptability while managing complexity through a unified adjustable system rather than multiple specialized components
2Manufacturing precision
If manual adjustment of mold form height is used, then the device complexity is low, but the manufacturing precision and efficiency are reduced
Solution Approach 1:
External reference sensors provide continuous feedback on the mold form's position and the desired profile. This feedback loop enables precise automated control of the mold form height, achieving high manufacturing precision while the automated system manages the complexity of coordination between multiple adjustment components
Solution Approach 2:
Manual mechanical adjustment is replaced with an automated control system that uses sensors, actuators, and a controller to precisely adjust the mold form height. This substitution increases precision while the automated system efficiently manages the complexity of coordinating multiple adjustment operations
3Manufacturing precision
If lifting columns are used to vary profile height, then the device complexity is moderate, but the control precision over the molded structure height is insufficient
Solution Approach 1:
The height adjustment system is segmented into multiple independent height adjustable supports, each with its own actuator and sensor. This segmentation allows independent control of different sections of the mold form, achieving high precision control over the molded structure height while distributing the complexity across multiple manageable components
Solution Approach 2:
The mold form transitions from a static structure adjusted by simple lifting columns to a dynamic structure with independently controlled segments. Each segment can be adjusted precisely through its own actuator system, enabling high precision control of the molded structure height while the coordinated dynamic adjustment manages the overall system complexity
Data Source
AI summary
A slipform paving machine includes an offset mold, including a mold frame, a form insert, a form insert actuator and a form insert sensor. A controller receives a signal from an external reference sensor and controls a position of the form insert actuator to control the height of the form insert relative to the mold frame and thereby control a height of at least a portion of a molded structure relative to a ground surface at least in part in response to the signal from the external reference sensor.