Filter Assembly Alignment for Cementitious Press Moulds
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Solution Overview
Problem
Existing filter assemblies for cementitious press moulds require attachment to a support plate, which can lead to misalignment and increased wear, impairing drainage and being time-consuming to attach.
Innovation Solution
A filter assembly where the filter sheet is directly attached to a filter frame, eliminating the need for a support plate, and is engaged with the die plate using a carrier engagement portion and filter engagement portion, allowing for secure placement without additional support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter assembly is attached to a support plate using adhesive, then the filter can be secured to the carrier plate, but misalignment occurs and wear increases impairing drainage
Solution Approach 1:
The filter assembly is segmented into a filter sheet and a filter frame that can be attached separately. The filter frame provides structural support and alignment features (protrusions) that engage with corresponding recesses in the carrier plate, while the filter sheet is attached to the frame. This segmentation allows the frame to handle alignment and attachment functions, preventing misalignment issues while maintaining ease of operation.
Solution Approach 2:
The filter frame acts as an intermediary between the filter sheet and the carrier plate. It provides engagement portions that interface with the carrier plate's recesses, ensuring proper alignment and secure attachment without requiring direct adhesive bonding between the filter sheet and carrier plate. This intermediary structure prevents misalignment and reduces wear on the filter sheet.
2Reliability
If the filter assembly requires attachment to a support plate, then the filter can be secured, but the process is time-consuming
Solution Approach 1:
The filter sheet is preliminarily attached to the filter frame during manufacturing, creating a pre-assembled filter assembly unit. This preliminary attachment ensures the filter sheet is securely positioned on the frame with proper alignment features already in place. During installation, the pre-assembled unit is simply engaged with the carrier plate by aligning the protrusions with recesses, eliminating the need for on-site adhesive application and significantly reducing attachment time while maintaining security.
3Reliability
If the filter is fixed to the head plate and lower former, then particulate material is prevented from exiting, but the structure becomes more complex
Solution Approach 1:
The filter frame serves multiple functions: it provides structural support for the filter sheet, ensures proper alignment with the carrier plate through engagement portions, prevents particulate material from exiting through the perforations by holding the filter sheet in place, and facilitates easy installation and removal. By consolidating these functions into a single filter frame component rather than requiring separate attachment mechanisms, the design achieves reliable particulate containment without excessive structural complexity.
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 solution ensures proper alignment and reduces wear, improving drainage efficiency and simplifying the attachment process, allowing for easier replacement of worn parts without replacing the entire carrier plate.
Implementation Method 1
The filter sheet (32) is mounted on a filter frame (34) and is formed from any suitable material such as a knitted or woven material that allows liquid to pass through, but prevents passage of particulate material
Implementation Method 2
The support layer may be formed with perforations and these perforations may be aligned with the perforations in the carrier plate in order to allow proper drainage of the cementitious mix
Data Source
Figure 1
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Figure 3
AI summary
A filter assembly (22) for a cementitious press mould (2) the filter assembly (22) comprising: a carrier plate (8) comprising a first carrier portion (26) comprising a plurality of perforations (30), and a carrier border (28) surrounding the first portion (26); and a filter (20) comprising a filter sheet (32) mounted on a filter frame (34).