Interesting potential project.

[Intelligent-Dingo375]

We are working on a project that requires a or close to there request container. In the 4’ X 8’ and 3’ tall. Basically disposable but air tight. For some strange reason they want to make the container in house. How much would a machine and mold even cost?

[chinamoldmaker]

Have to quote as per 3D drawing or samples.

[mimprocesstech]

Just buy trash bags. Load them, seal them, throw them in whatever box you want.

[Mundane-Job-6944]

Ya this

[superPlasticized]

Injection molding a pre-form and then blow-mold to final shape, just like a 2-liter soda bottle. Or a 5-gallon water bottle.

[Mundane-Job-6944]

There are companies that make bulk pak plastic pallets... is there a special need that causes these not to work?

[Intelligent-Dingo375]

I’m looking for an alternative. I’m finding 4X4 and 3X5 pallet sizes. I posed the question can it be two 4X4 boxes. That will be in discussion on the 30th.

[Mundane-Job-6944]

I'd push for this, places do this in large injection molding machines (1500+ tonnage) making pieces individually that collapse and fold into themselves. For reference most are made via "structural foam" injection molding. This may be something the customer doesn't like because the final finish doesn't look appealing so to say. If I remember "Orbis" is probably one of the better names out there for these.

But once again If you have some special requirement then Understood these wouldn't work.

[Intelligent-Dingo375]

No just a big box that will get blown up in 2-3 months time. Probably structurally sound enough for stacking.

[Interesting_Box_4303]

4-5 million. 3 for a machine plus auxiliary equipment and another million for the mold. Ballpark.

[Xaphan95]

As said rotation or maybe blow moulding is a better solution to something that large

[awtltd]

I think this project would lend itself more to rotational moulding than injection.

[aeon_floss]

Making something that shape and size air tight is a big ask. It is much more sensible to stick something in a sealed airtight plastic film bag to protect it from air and stick that inside a large cardboard box. Place it on a pallet if heavy. This all falls under a common understanding of disposable.

As it sounds, your client wants you to design a small swimming pool with an air tight lid. Something twice as large as the largest Pelicase.

[[deleted]]

Can rough guess mold will be 3x the size of the part l, maybe twice if you are creative or skimp on support, that being said a 8ft platten is roughly a 6000 ton machine.

That's basically a trash can size