Questions tagged [casting]

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Feasibility of additively manufacturing large metal objects in microgravity/high vacuum (space)

This a somewhat speculative question; I would like to know whether it is feasible to additively manufacture large (>100m) metal objects - from for example aluminum alloys - in a space environment. ...
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1answer
32 views

Is there a way to avoid reheating of steel billets in Reheat furnace and directly go from casting to roll milling?

Iron ore and few compounds added will result in steel which are casted to steel billers form. this billet is again reheated to melting point of 1200c and then sent to roughing mill for desired shape. ...
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2answers
65 views

What are the design principles for risers in sand casting?

Risers are added reservoirs used to feed liquid metal to solidifying casting. In the case of alloys that shrink during solidification (this is not the case of all alloys), one uses such reservoirs to ...
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2answers
75 views

which type of casting will give higher cooling rate, casting in thin water-cooled copper mold or casting in thick copper die?

It is will known that increasing cooling of a metal casting will lead to finer micro-structure which mean higher mechanical properties. If I have 2 molds one is thick copper die ,& second is just ...
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1answer
41 views

Pouring aluminum into disks or cylinder shapes?

Is their a good method of making aluminum disks from molten aluminum? I have a large amount of aluminum castings and I would like to make rounds that could be chucked into my late and used to turn ...
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2answers
54 views

Surgical steel and part production

Steels 316L, 420, 17-4PH and 316LVM are often chosen for medical products and labelled as "surgical grade". I am curious as to how these types of steel are used for the production of common medical ...
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4answers
165 views

What is the purpose of grid-like details on engine blocks?

It is common to find this kind of detailing and patterning on engine blocks and related parts. Older engine blocks display much more flatter and simple geometry and this kind of mold work must come ...
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1answer
111 views

Purpose and name of fine pitch marks on a cast metal part

I have seen this kind of mark on various cast metal parts. This is an image of the base casting of a hard disk drive made by HGST. What are these marks for? What are they called?
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2answers
95 views

Which materials can be used to make permanent casting molds for cast iron?

I am interested in comparing the different materials that can be used to make castings of cast irons, and therefore was wondering which material is commonly used/which materials can be used to make ...
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2answers
69 views

Pouring copper onto another copper block

When pouring copper onto another copper block and I want to have a good solid welding of the poured copper onto the block, do I need to use a flux? Or, if the block is freshly cleaned and free of most ...
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1answer
1k views

What's the point of draft in sand casting

I know what pattern draft is and it's usefulness in removing castings from rigid moulds. That's the definition you can find anywhere. My problem is when you sand cast. Sand casting is the most ...
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1answer
96 views

How to cast and mold melt plastic to a shape and design you want?

I am trying to use plastic for a cheap and easy casting but I'm having trouble in molding it to any given shape. I'm trying to see if I can make a spark plug and want to cast out a model for measuring ...
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1answer
41 views

How to chose production process of copper electrical connector, Extrusion vs Die casting

I want to get manufacturing done for custom designed copper connector which I am planning use it in my home automation project. I created design of the connector in Freecad . I have exported the ...
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28 views

Joining zinc components

I have a zinc lock box that looks like this: where there's a top and a bottom part. Notice that there're two interesting features (circled in red): After cutting it up slightly: The section view (...
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1answer
843 views

What is the highest-temp castable refractory cement available?

I very much ruined 3 $10 diamond hole saws making this ceramic insulator out of a firebrick and Ryobi drill press. Drilling out the large core took 1-2 hours and a lot of arm strength. Therefore, I ...
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678 views

What are 'inside' and 'outside' dimensions in reference to castings?

I am looking at a company-written standard for cast parts. The castings are blanks for driveshaft yokes, similar to what is pictured below. The standard defines general tolerances for the dimensions ...
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430 views

How do the dimensions of a ductile iron casting change as it cools?

I am designing a pattern for a sand casting. It has only one critical dimension which is a 4" inner diameter cylinder. If I use a 4" core, will the casting shrink away from the core? In other words ...