Decentralized Press Cylinder Control Valves
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Solution Overview
Problem
Existing continuous presses for material processing, such as wood-based panels and laminate boards, rely on centralized hydraulic distributor blocks for control, which limits flexibility and variable operation, as the interconnection logic is hardware-based and fixed.
Innovation Solution
Decentralizing control by assigning a separate proportional control valve to each press cylinder, allowing for individual cylinder control and eliminating the need for central hydraulic distributor blocks, enabling fully variable pressure control via an electrical matrix controlled by a computer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If centralized hydraulic distributor blocks are used for control, then the system structure is simplified and easier to maintain, but the flexibility and variable operation capability are limited due to hardware-based fixed interconnection logic
Solution Approach 1:
The centralized hydraulic distributor block is segmented into individual control valves, with each press cylinder receiving its own dedicated control valve. This segmentation transforms the fixed hardware-based interconnection into flexible electronically controllable individual units, enabling variable operation while maintaining system simplicity through modular architecture
Solution Approach 2:
The system transitions from static hardware-based interconnection logic in centralized distributor blocks to dynamic electronically controllable valve actuation. Each control valve can be independently activated or deactivated based on real-time operational requirements, allowing the system to adapt flexibly to different pressing patterns and material requirements
2Device complexity
If centralized hydraulic distributor blocks with fixed interconnection logic are used, then the device structure is simpler, but the control precision and variable pressure control capability are reduced
Solution Approach 1:
Each press cylinder is equipped with its own control valve, enabling localized and independent pressure control for each cylinder. This local quality approach allows different pressure zones to be precisely controlled according to specific operational requirements, transforming the uniform pressure distribution of centralized systems into customizable localized pressure profiles
Solution Approach 2:
The mechanical/hardware-based fixed interconnection logic of centralized distributor blocks is replaced with an electronically controlled valve actuation system. This substitution enables precise digital control of each valve, allowing for exact pressure control and flexible programming of pressing sequences without the constraints of fixed mechanical pathways
3Adaptability or versatility
If separate control valves are assigned to each press cylinder, then the flexibility and variable operation capability are enhanced, but the device complexity increases due to more control valves and eliminated central distributor blocks
Solution Approach 1:
The control valves serve multiple functions: they regulate hydraulic flow to individual cylinders, enable independent pressure control, and can be selectively activated based on operational requirements. This multi-functionality reduces the need for separate control mechanisms for each cylinder, effectively managing system complexity while maximizing operational flexibility
Solution Approach 2:
Each control valve is directly associated with its corresponding press cylinder, creating a self-contained control unit. This self-service architecture allows each cylinder-valve pair to operate independently based on electronic control signals, eliminating the need for complex centralized coordination and reducing overall system complexity despite the increased number of individual components
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
This approach allows for highly variable and flexible operation of each press cylinder, eliminating the need for hardware-based interconnection logic and enabling precise control of pressure zones, enhancing the production efficiency and adaptability of continuous presses.
Implementation Method 1
the press cylinders are each equipped with at least one of their own control valves (arranged spatially directly on the cylinder), wherein these control valves are particularly preferably designed as proportional valves
Implementation Method 2
a continuously operating press for the continuous compression of mats of material, wherein such a continuous press has a heated upper press plate in the upper part of the press and a heated lower press plate in the lower part of the press
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The invention relates to a press for compressing material, comprising a press frame (3), an upper press plate (1) in the upper part of the press, and a lower press plate (2) in the lower part of the press, wherein the upper press plate (1) and/or the lower press plate (2) is acted upon by a plurality of press cylinders (7) arranged in several rows, and wherein a plurality of control valves (9) connected to the press cylinders (7) are provided. Each press cylinder (7) is equipped with at least one control valve (9).