Press membrane for dewatering laundry
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Solution Overview
Problem
Existing press membranes for drainage presses are difficult to attach under a stamp plate due to heavy fastening rings, which require precise positioning and handling, leading to inefficiencies and potential leaks.
Innovation Solution
A press membrane design featuring at least one lead on its inner wall, serving as a temporary support for the fastening ring, allows for easy insertion and connection from above, eliminating the need for complex seals and reducing handling difficulties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a heavy fastening ring is used to secure the press membrane beneath the stamping plate, then the press membrane can be firmly attached, but the handling and positioning become difficult and time-consuming
Solution Approach 1:
The fastening system is divided into two independent components: a reusable fastening ring and a replaceable press membrane with integrated projections. This segmentation allows the heavy fastening ring to be separated from the membrane, enabling independent handling and positioning of the membrane while the ring remains stationary on the stamping plate.
Solution Approach 2:
The press membrane is pre-equipped with projections during manufacturing that extend into the membrane collar. These projections are prepared in advance to receive and support the fastening ring, eliminating the need for complex positioning procedures during installation and ensuring proper alignment before attachment.
2Strength
If the fastening ring is permanently connected to the press membrane, then the attachment is secure, but the fastening ring must be replaced every time the membrane is replaced even though it is not subject to wear
Solution Approach 1:
The fastening ring and press membrane are designed as separate, detachable components. The fastening ring remains permanently attached to the stamping plate through threaded connections, while the press membrane with its projections can be independently removed and replaced. This allows the durable fastening ring to be reused across multiple membrane replacements.
Solution Approach 2:
The press membrane is designed as a consumable component that is replaced when worn or damaged, while the fastening ring is recovered and retained on the stamping plate. The projections on the membrane collar enable the fastening ring to be easily removed with the membrane and then reinstalled on the next membrane, preventing loss or damage to the valuable fastening hardware.
3Strength
If an outer fastening ring with a seal is used to secure the press membrane, then the membrane can be held in place, but the seal complexity increases and leak risks arise
Solution Approach 1:
The sealing function is extracted from the fastening ring and transferred to the press membrane itself through the projections that extend into the membrane collar. These projections create a mechanical interlock that prevents fluid leakage without requiring additional seal elements, simplifying the overall design and reducing leak risks.
Solution Approach 2:
The press membrane, made of flexible material, incorporates the sealing function through its projections rather than relying on rigid seals. The flexible nature of the membrane allows the projections to maintain contact and sealing pressure against the stamping plate surface, providing effective sealing through the membrane's own properties rather than additional components.
Data Source
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AI summary
Devices for draining washed laundry (10) have a pressure diaphragm (19). The pressure diaphragm (19) is detachably fastened under a piston plate (18) of the device by a retaining ring. This connection is very complex due to the high weight of the pressure diaphragm (19), which has a diameter of approximately 1 m. To facilitate the fastening of the pressure diaphragm (19) to the retaining ring under the piston plate (18), the pressure diaphragm (19) is provided with at least one internal projection on its diaphragm collar, which forms a bearing for the retaining ring (32) during the assembly of the pressure diaphragm (19) under the piston plate (18). This temporarily supports the retaining ring during the assembly of the pressure diaphragm (19) under the piston plate (18), thus simplifying the assembly of the pressure diaphragm (19) under the piston plate (18).