Questions tagged [product-engineering]

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4
votes
1answer
78 views

What can be the mechanism used in devising a machine that can arrange the dishes properly to make the cleaning faster in the messes/hotels [closed]

In hotels/messes the used plates are often placed haphazardly, and the workers need to pick the plates carefully to clean them. This leads to longer washing times and longer waiting times for ...
2
votes
1answer
117 views

Mechanical/electronic chalkboard cleaning device to replace the conventional duster to clean the chalkboard

The chalk board duster which is used by teachers to wipe the chalkboard seems very agonizing for them. What new mechanical/electronic devices can be devised to replace conventional chalkboard duster ...
3
votes
2answers
110 views

Is design of “Budweiser's bow-tie shaped beer can ” feasible & unique from engineering point of view?

Is design of "Budweiser's bow-tie shaped beer can " feasible & unique from engineering point of view? Can there be a better design than it? Like the shape of can is inclined at ten ...
6
votes
1answer
36 views

How is mechanism used in modern projector different from intermittent mechanism used in conventional one?

Do modern projector used for digital class works on same old conventional intermittent mechanism and blocking of light during change of frame. What is principal used in modern projector?
4
votes
1answer
34 views

What is the reason for the intermittent motion and blocking of light during change of frame in Conventional projector?

Conventional Film projectors do not advance from one frame to another by continuous movement of the reels. What is the reason for the intermittent motion and blocking of light during change of frame ...
-1
votes
2answers
34 views

How to design internal wall separation in the PVC tube to use it as a water tanker

I am working on design of the column which contains the water tanker and the pump + electronics at the bottom. I have tried different solutions and they failed. I would like to know your advice on ...
1
vote
1answer
42 views

Safe temperature thresholds for #2 HDPE and #5 PP plastic

It would be convenient to use a temperature adjustable heat plate (element)/mug warmer for the massive amount of blender bottles accumulated over the years. What are safe thresholds to safely warm the ...
1
vote
1answer
27 views

From advanced prototype to low-volume production

So to the point. In our project (Robotics project) we mostly use sheet metal and PLA printed parts to build. But we want to level up and be ready for an advanced run and even low-volume production of ...
1
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0answers
20 views

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 ...
1
vote
1answer
43 views

Can wooden mold be used for blow molding?

I should have produced a custom designed bottle, but metal molds are some expensive and because we don't require too many products (we just need 100-200 piece), I need a way to reduce the cost. So I ...
4
votes
2answers
99 views

Why automakers are/should be making medical ventilators?

I am not very familiar with the mechanics of neither a car nor a medical ventilator. Considering global coronavirus pandemic and shortage of medical ventilators in many countries, I saw some news ...
-2
votes
2answers
348 views

Why do Nescafe's (and others'?) instant coffee jars have an inner seal with no “grip” for easy removal?

For a number of years now, I have been buying instant coffee products. Since the main brand has been Nescafe, this question is specifically about their products, even though I vaguely recall that the ...
0
votes
1answer
21 views

Designing a “ratcheting” spinning wheel with ferrous metal bits

I'm trying to design a freely spinning wheel that will "lock" into a few different configurations. I'm planning on placing a rare earth magnet near a certain point on the wheel, and inserting bits of ...
1
vote
1answer
100 views

What are the essentials of a good PRD (product requirements document) for a new mechanical device

I need to write a non technical product requirements document for a new machine that I want designed. I need to write a PRD, and I need to ensure that I have included all the salient information, ...
2
votes
1answer
118 views

When designing scissors, how do you design the blade geometry to ensure good cutting capabilities?

I have been looking online and found there should be two points of contact, one in the blades and one in the pin. In order to achieve this, I assume there's a slight angle of the blades into the ...
1
vote
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 ...
1
vote
2answers
65 views

Which design to maximize friction for a device standing on concrete?

I have a device 4cm X 5cm X 15cm that stands on asphalt/concrete/road. So, the device is taller than its base which makes contact with the asphalt. I want to maximize the friction so that the device ...
1
vote
2answers
94 views

Coating brass components cheaply

I have seen a number of products made of brass with a silver-looking coating covering the brass on the outside. These products are all quite cheap (for example a small watering can or clothes hooks). ...
0
votes
1answer
39 views

what subject in Mechanical engineering deals with the making of External cases for electronic gadgets?

can anybody tell me what subject in Mechanical engineering deals with the making of External cases for electronic gadgets? I know I need to use CAD/CAM but I am asking this question because I want to ...
0
votes
1answer
62 views

Production technology for hexagonal shaft ?

The shaft is the most important element in my machine, so i rather prefer forging for production technology, the circumscribed circle of the shaft is about 140 mm and the length is about 1400 mm. ...
1
vote
3answers
62 views

rod technical name

Does anyone knows what is the name of this rod? are these available in the market?
3
votes
1answer
782 views

Industry standard dimensions for a 5-gallon water cooler?

I'm designing a product to accept a 5-gallon water jug. This is the light blue, transparent plastic kind for potable water that you can buy, swap, or fill at grocery stores. I can take measurements of ...
1
vote
1answer
91 views

Why are CO2 analyzers much more expensive that CO detectors?

This question emerges from Earth Science SE since recently there was asked this. There so far no one had the engineering/ measurement device expertise to answer this. I am aware that these are ...
0
votes
1answer
43 views

Choosing the best type of portable cord for a consumer electronics product

Consumer-level electrical portable cords come in a variety of types (and gauge, but that's not the subject here) and each must have its rationale, considering the cost constraint (performance/price ...
1
vote
0answers
29 views

Required clearance for moving part (Push Button)

I'm designing a push button made from most likely ABS but possibly TPE, it presses a surface mount button on a PCB with 0.9mm travel. The ABS button is 8x8mm Square and travels through 4mm of ...
3
votes
1answer
2k views

How to create a clear bill of materials list?

I am required to create a Bill of Material for a steering system I am designing. However, I am not entirely sure how to structure it. For example, what type of order are the parts listed as I have ...
1
vote
1answer
50 views

What manufacturing process is suited for production of the elastomer strip?

What manufacturing process should be adopted to manufacture a LEGO® compatible strip made by material which is rubber like?
1
vote
1answer
83 views

How do you calculate the required power of a disk turbine (Rushton turbine) to rotate a fluid at a given speed?

I am designing a potato peeler which is practically a bucket that has a rotating disk (figure below) at the bottom driven by a motor. Water and potatoes are put inside the bucket and the disk rotates ...
1
vote
1answer
92 views

Patent for product I designed

I have designed a product and I found that there is a patent on that specific product. There also seems to be many patents and for the smallest or most obvious use of items. I am wondering if anyone ...
0
votes
1answer
65 views

Feasibility of product idea [closed]

I have an idea for a sports equipment innovation "a new product" that a track and field athlete can use to practice and train his sport. The technology involves a laser beam. I'm wondering if my idea ...
3
votes
2answers
313 views

Stability issues in gateleg table design

This is a table with two wings that fold down, and two legs per side that swing out for support. I'm pretty confident about this design being stable: The green section at the top is the only surface ...
3
votes
1answer
82 views

What to do first when going from Prototype to Finished Product? [closed]

When you have a working prototype based on off the shelf parts (eg. Arduino), and you want to move to designing a finished product, what is the correct order of development? Electrical Engineering? (...
3
votes
1answer
65 views

Placing machine visions targets with high accuracy

My company is working on a machine vision application. One of our requirements is that the camera peer through a frame (like a picture frame - see here ), where the top and bottom border are etched ...
2
votes
1answer
57 views

How can I remove Ozone from a sealed enclosure

One of the processes in a current product design catalyzes the conversion of atmospheric oxygen into ozone: $$ 3\text{O}_2+\text{energy}\rightarrow 2\text{O}_3 $$ Ozone is highly reactive and, over ...
3
votes
1answer
1k views

How to prevent static buildup in an electric burr mill coffee grinder?

Every morning when I get up, I use this coffee grinder to grind beans for my morning coffee. When I remove and subsequently open the top of the bin, I often find that enough static electricity has ...
1
vote
0answers
106 views

What does it mean to design something by using “first principles”? [closed]

A fan of Elon musk but have hard time understanding his engineering approach when he says use "first principles". Could anyone elaborate on that ? When we got a problem at hand what is the first ...
2
votes
1answer
1k views

How to determine if an engineering process is stable and capable?

Mostly interested in understanding how engineers determine if an engineering process is stable and capable, particular in design for manufacturing (DFM) frame work for components. Some example ...
6
votes
3answers
259 views

How can the vendor be approved/disapproved based on validation test data?

The power requirement for a sub system is 5V +/- 10% @ 1A of current. A RFQ was issued and a prospect vendor was selected. A first article of inspection (FAIR) has been submitted which includes 15 ...