molds for "shaping"

[ziotoy]

hello to all,someone could be so kind to explain to me at large lines how the molds for "shaping" work...for car seats for example? What are the main characteristics that the mold must have and what are the most common problems!! For example, in this type of moulds should be considered the "retreat" as for thermoplastic molds? ?
Thank you in advance.
Say hello,ziotoy.

 

[SHIREN]

hello to all,someone could be so kind to explain to me at large lines how the molds for "shaping" work...for car seats for example? What are the main characteristics that the mold must have and what are the most common problems!! For example, in this type of moulds should be considered the "retreat" as for thermoplastic molds? ?
Thank you in advance.
Say hello,ziotoy.

Hi.
Maybe refer to expanded polyurethane
are typically aluminum molds in two or more parts
with hinges and handles for manual closure
typically on the top of the mold there is a conical hole with its cap where the material is inserted and quickly closed
the half-mills of the moulds must have a edge cut
In this type of processing the cost to avoid is to trim the handbaws
or build other moulds for cutting the same
molds must include a mold heating circuit
to avoid different heat in multiple areas of the mold
the surfaces of the prints can be more or less glossy depends on the fact that it is necessary to realize
also to keep in mind which product surface can be obtained at the top of the mould usually (almost always)
There is an accumulation of air and gas that make this surface full of blows
molds can also be made of epposidical resins
or external carcass in aluminium casting and prints obtained from matrices
with resins
for prototypes of few pieces the tsampi can be made of hard wood or plywood phenolic type
This is an example of "schumature" molds.
Thank you very much

 

[ziotoy]

Thank you very much, you were exhaustive.
greetings and thanks again.