Espero que te sirva. Honestamente mi research no me ayudo mucho pero a falta de otras sugerencias te ofrezco esta.

I could find nothing referring to sipping racks. Could it possibly be a typo and refer to a shipping rack? In other words, a metal structure used to hold/protect items that are being shipped. See the following:

Shipping Racks
We design and build racks to work as well for the receiver as they do the shipper, delivering ergonomics with high density for excellent shipping cost efficiency.
(http://www.afcomanufacturing.com/racks.htm) - several pictures here

Oregon's solution was a new shipping rack with 150 individual slots to hold the glass panes. The glass could be loaded in the same order as the customer's ...
www.goldratt.com/oregonerp.htm

used to achieve a class-A, non-blemished surface. After welding, the part is unloaded to an operator for visual inspection and then placed in a shipping rack. ...
www.ipnews.com/archives/automation_assembly/july2000/newcor...

I’m not sure if this has a specific name in Spanish, but maybe you could call it a bastidor or estructura or soporte para transportes.

Una empresa francesa que fabrica muebles busca tecnología para embalar sus propios productos como: cocinas, kits, mobiliarios, etc. La empresa está interesada en alguna oferta innovadora en el campo del colectivo de: envoltura, embalaje para embarque, sistemas de embalaje, soportes para transportes, etc.( http://www.ujaen.es/serv/vicrel/otri/oferdeman/sep98.html).

Just a thought, anyway... see if it fits your context.

utilizada en fabricación metálica para aspirar las virutas de metal