Questions tagged [waterproofing]

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How can the spinning arms of a dishwasher be leakproof?

Recently I was wondering, how it is possible, that the spinning arms of i.e. a dishwasher or a high pressure cleaner can form a leakproof connection from the fixed watersupply to the nozzle on the ...
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0answers
28 views

water leak through subterranean cable penetrations in concrete

See the image below for the detail of 4 no. cable ducts that run from a trench in a raft foundation (on the left) through an approximately 1 m square penetration in the raft foundation, through soil (...
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0answers
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I want to test non woven fabrics to see if they are polypropylene, the lining material of N95 masks

A group of us are sewing face masks to prevent the spread of sputum. I've learned that the lining of an N95 mask is made of polypropylene. Polypropylene is also a common interfacing product for ...
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1answer
35 views

How to properly fit almuminum glass window without leakage?

I got a brick-wall house. The wall is 25cm thick. I want to add windows. There are 2 ways of adding a window: Adding the window on the inside side of the wall, so that if the aluminium frame of ...
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1answer
56 views

How are water-tight transmissions made, like the kind you see on inboard boats, pumps or food blenders?

I want to replicate the kind of interface you see on inboard boats, pumps, or food blenders. Basically, I want put a motor in a sealed vessel, and have it turn a prop outside the vessel, in water. ...
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1answer
58 views

How to rotate the blade?

I have developed a design for a river cleaning machine which can cut and collect weeds. The problem which is facing is how to rotate the circular blade which is attached in front of the machine. I ...
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0answers
27 views

Is there any software for testing cad model waterproofing and isolation?

I have a cad model of a plastic box that is made of two parts. Two parts are connected with resin isolation. I want to test if my part is at least in theory ip86 water-resistant. So is there any ...
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1answer
42 views

Hermetic Cable Seal With Space Limitations

I have an application wherein I need a hermetic seal at cable exit points from a plastic housing. The cables are not removable. I'd like to achieve this seal using the plastic housing itself by ...
2
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1answer
40 views

Waterproof Pan control/bearing/mechanism

Please bear with me - I'm not an engineer, I'm a software developer so lack the language / knowledge to describe what I want precisely. I'm controlling a servo to rotate /pan a platform to hold a ...
2
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3answers
81 views

What type of stainless steels can resist 6 months under the sea?

Resist means without catastrophic corrosion here. We assume that there is no coating or anodic protection. The steel can be mirror polished and passivated. To make it more difficult, the shape is not ...
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2answers
42 views

How deep would a water bottle have to be submerged in the sea to burst? [closed]

Assume the water bottle is the most sturdily built standard water bottle one could acquire in an american supermarket. This is the first question I've asked, so I'm sorry if I'm not in the right ...
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1answer
67 views

Can we rotate the given white wheel?

When the box is upside down and filled with water, is it possible to rotate the white wheel freely without water being leakage by any method or any existing technology? White is wheel and green is ...
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2answers
784 views

Sealing a rotating shaft in a 3D-printed part

I need to seal a rotating shaft that protrudes through a wall in a 3D-printed enclosure I am designing for a school project. The enclosure is for what will be a small generator that will be used in ...
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3answers
56 views

Microphone angled waterproofing

We are working on a mounted screen design that will have microphones at the bottom of the screen housing. The screen housing will be sitting at a 10.5 degree angle. So we are worried about water ...
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2answers
644 views

Material thickness to withstand Pressure

Let's say I have a Sphere made out of Acrylic, with a diameter d meters. And I want to submerge it down in the ocean. The depth is such that it reaches up to ...
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1answer
99 views

O-ring compressive force

Is there formula to calculate the compressive force required to achieve x% of squeeze in an O-ring? I have referred the Parker O-ring and Apple Rubber Handbooks, but they provide just approximations. ...
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1answer
824 views

O-Ring Selection for a round rectangle groove

I'm designing a water proof case for a power bank to be used in an occasional underwater condition. The input and out put port components already have a gasket or sealing ring. Now to close the case I ...
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3answers
61 views

Transmission of rotational power across a waterproof boundary [closed]

Considering the situation where: A non-waterproof motor is used inside a waterproof box Something must be rotated by that motor in a wet environment outside the box What is the correct way to ...
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2answers
221 views

How to water seal a metal plate into the wall of a plastic water tank?

I have a 10 x 10cm square plate of metal I would like to insert into a hole in the wall of plastic water tank (cube shape), I'm planning on 3D printing the tank itself (only 1-2 litres). What would ...
3
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1answer
91 views

How wasn't Thames Tunnel flooded during construction?

I have read the Brunel's shield directly exposed ground which was then excavated by the workers. But the construction was done just a few meters under the seabed. How wasn't the tunnel flooded ...
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0answers
511 views

In the Panama Canal, how are the lock gates kept water-tight (at the hinges, middle, and bottom)?

The Panama Canal has these huge gates. They close so the locks can be flooded or drained. They're swing gates, so 3 questions come to mind: How are they water-tight at the hinges? How are they water-...
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1answer
187 views

Waterproof Case Time Limits

Some cell phone cases have a waterproof rating of IP-68, often specifying that they can tolerate immersion to 6 feet for 30 minutes or 3 feet for 60 minutes. My understanding, however, is that a good ...
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2answers
524 views

Why does epoxy resin become opaque after long exposure to water and LED lamps?

I want to put LED lamps in water. Up until now I used epoxy glass for its isolation, but after one year it starts to become opaque and lose its clearness. What causes the epoxy glass to cloud and ...
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2answers
1k views

Can I seal the inside of a water well to use it as water reservoir when the well is dry?

We've had unusually dry weather and our well has run so low that we had to call in a water hauling company to refill it a few days ago. The water man told me that even though he dumped in ~ 1000 ...
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2answers
141 views

Thermoplastics that are permeable to water - high diffusion coefficient

I want to know if there are some fairly common thermoplastics that allow water to pass through (by diffusion) at a relatively high rate (on the order of days). For example, PET water bottles leak ...
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4answers
2k views

What are the common failure points of waterproof cases?

I am making a waterproof case for my Galaxy S5 and/or my Raspberry Pi. I plan to make the main body from (or at least decorate it with) wood, though I can use other, stronger materials where needed. ...