# Questions tagged [manufacturing-engineering]

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### Could 3D printing be done at a distance e.g. by pointing laser?

Could 3D objects be printed from a distance? Say, by pointing a laser at a stone wall? I'm not concerned with whether the requisite technology already exists or would be difficult to build, but ...
0answers
30 views

### Phase prediction by cct diagram

Can someone please help in finding out the phase proportion of each phase w.r.t time , cooling rate and temperature by using (mathematical model to predict phases from given cct diagram) Leblond ...
1answer
39 views

### CNC or other method for Wire Forming

How can I quickly and accurately form batches (10 to 100) of parts from mild steel wire about 3mm diameter ? The parts are 3D with bends of several radii, about 200mm in the longest direction with ...
1answer
201 views

### Why aren't modern pistons circular?

I'm trying to make most of an engine from scratch (cylinder, crank case, piston). I've been reading about pistons and I've learned that many modern pistons are cam ground--slightly elliptical in shape ...
1answer
65 views

### How to obtain an homogeneous mixture of 10 000 tons of minerals, each one in a different pile? [closed]

I have several (at least six) piles of mineral adding up to 10 000 tons. I want to mix them in one homogeneous big pile. How can I do it? Thank you very much!
4answers
60 views

### Is it somehow possible to “lock” moving boxes without damaging them? [closed]

I have a standard moving box like this: Of course, since I'm asking about it, they don't have a top-down photo. These are other photos, if they help you understand how it's constructed better: ...
2answers
39 views

### Is it possible/practical to mold a single hollow piece of carbon fiber with a sealed vacuum in the middle?

Let's say I design a simple piece of carbon fiber to be manufactured, in the shape of a simple cylinder with a diameter of 2cm and a height of 3cm (pretty small). Is it possible and/or practical to ...
2answers
89 views

### How can i obtain heat from conductive paint using dc current

I have been searching for a material that can heat up when we supply dc current. Many give me a suggestion for use nichrome wires. Or carbon rich paste paint(conductive paint). I want a sheet of such ...
2answers
33 views

### Technology used to create chambers in metal laminates

A number of years ago, I remember hearing of a technique to manufacture the leading edge surface of a hypersonic jet (or something aerospace related) where multiple sheets of metal were welded ...
2answers
42 views

### How did OXO manufacture this colander with such intricate wall feature?

Here's my guess, but I would love to hear another perspective. I think this is injection molded. This colander has draft angles and the two mold halves use an intricate step-like wall pattern to ...
1answer
45 views

### How did OXO get text into this inside feature?

I am a student trying to learn about how OXO made this cup. Here are some constraints that I know: I figured out that the text on the outside can be made using screen printing, but then I don't think ...
1answer
70 views

### What is the real CO2 emission for cars? 1g/km or >100g/km?

If one searches for the different levels of CO2 emissions in cars, one can find two very different levels. For instance: 1: Here it is written that: The law requires that the new cars registered ...
2answers
58 views

### Selecting material for plastic hinge

I have designed a plastic part shown in blue that will be injection moulded. The part is a lever that takes 1 mm of movement downward and outputs 6 mm of movement upward. Circled in green is a hinge ...
1answer
29 views

### What are good color coatings for a steel surface?

I need to decide upon a color coating for a steel surface. This will be a grill top accessory and will be in contact with flames. I would prefer a black/brown coating color. I was considering teflon ...
1answer
29 views

### What material can withstand continuous working temperature of 1000 degree Celsius?

I'm designing a block for creating turbulence inside a traditional furnace. I would like to know about a material which is economical and can be put into operation for more than 2 years.
2answers
45 views

### What is the engineering way to describe a factory / manufacturing plant system in a formel and mathematical way

I am interested in mathematically describing as well as formalising a manufacturing plant so that other people in the engineering field understand how the system works. I am not from the engineering ...
2answers
86 views

### What does stress analysis of 3D printed parts reveal vs their normal counterparts?

I have seen videos or heard about 3D printed buildings, 3D printed space shuttle parts and more. There seems to be a lot of craze developing around 3D printed manufacturing. I have never heard anyone ...
1answer
116 views

### Operator's Efficiency

Good day, I have assigned a task where I have to calculate efficiency per operator as shown in image below. But I have no idea how to get the correct formula. Any help would be greatly appreciated. ...
1answer
41 views

### Public data re possible estimate of baghouse efficiency. Plus characteristics of chromium emissions. Thanks!

I'm doing an article on a company whose Title V Operating Permit is currently under review by state regulators. (See biographical note below.) See also my specific questions, numbered below. Most ...
2answers
125 views

### Talking in terms of 6 sigma, why 4 ppm would be very costlier than 1 ppm (part per milion)?

In industrial manufacturing lines, there is a a limit on the number of discarded parts per million.I need to have a sense about this, e.g. How different is 4 ppm from 1 ppm and how much does it ...