Home Built Hot Wire CNC Foam cutter
Day 1 - Vertical Y Axis
Day 2 - Horizontal X Axis
Day 3 - Lead Screw
Day 4 - Electronics
Day 5 - Finalizing the machine
Other CNC foam cutters
A New Design - Hot wire CNC Foam cutter
Foam Sample Cuts
Foam Cutting Videos
Links - RC stuff, Stepper Motors, Lead Screws
More information - about stepper motors

Links
FoamLinx Site - Foam Cutting CNC Machines
CNCLinx Site - CNC Router Tables
Foam Cutting Services - EPP, EPS, XPS
All About Foam Forum - Beta
Composites Prototyping and Design
Large and Configurable CNC Machines *
Online Store



Articles
How to coat EPS foam (Crown Moldings)
How to build an EPS Foam Recycler
How to build an EPS base and Cap cutter
How is EPS manufactured - molded
How to make RC foam planes
How to cut EPS, XPS, EPP foam
How to cut Polyurethane foam ( PU )
How to cut Acrylics - Laser cutting

What is - more info about foam
What is EPS foam
What is XPS foam
What is EPP foam - Expanded Polypropylene
What is PE foam - Polyethylene foam
What is Polyurethane foam
What is Memory Foam


 

 

                                Polyurethane Foam

A polyurethane is any polymer consisting of a chain of organic units joined by urethane links.
It is widely used in flexible and rigid foams, durable elastomers and high performance adhesives
and sealants, fibers, seals, gaskets, condoms, carpet underlay, and hard plastic parts.
Polyurethane products are often called "urethanes". They should not be confused with
the specific substance urethane, also known as ethyl carbamate. Polyurethanes are not
produced from ethyl carbamate, nor do they contain it.

Polyurethane foam (PF) is a light firm hydrothermal insulation material with a specific structure that stipulates
the lowest thermal conductivity rate and the least water absorbing compared to other heat insulation materials.

Polyurethane foam popularity is explained by the simplicity of their obtaining process right at their application place.
This is possible due to the fact that the charge stock for polyurethane foam are liquid materials of various viscosity
rate; when mixing them, a chemical reaction of polymer fusion takes place; the polymer simultaneously frothers and
a gaseous medium is created (evaporates).

Elastic semi-rigid and rigid materials are manufactured from polyurethane foam. Polyurethanes are processed
almost with all existing engineering methods - extrusion, pressing, casting, moulding, sputtering, etc. Absolutely
all known construction materials and products types are obtained from polyurethane: filled, clad, frothed, laminated
and other types in the form of plates, sheets, blocks, profiles, fibers, skims; products and constructions from
polyurethane are also used in absolutely all industry branches.

Due to a possibility of receipt changes in polyurethane foam properties, it is possible to use them for heat insulation
of industrial and civil buildings, constructed from ferroconcrete blocks, brick and other materials, for heat insulation
and doorways and window openings compression, as well as heat insulation of any type of a conduit.

Another very interesting technology application area is insulation and waterproofing building roofs.
Polyurethane foam application here makes it possible to cover roofs of any configuration without a
single joint. It is possible to apply the material both onto new constructions and onto old ones
covered with metal, ruberoid or roofing slate. It is not obligatory to dismantle old cover or to
conduct any kind of first workings.

Uses
Polyurethane products have many uses. Over three quarters of the global consumption of polyurethane
products is in the form of foams, with flexible and rigid types being roughly equal in market size. In both
cases, the foam is usually behind other materials: flexible foams are behind upholstery fabrics in
commercial and domestic furniture; rigid foams are inside the metal and plastic walls of most
refrigerators and freezers, or behind paper, metals and other surface materials in the case of thermal
insulation panels in the construction sector. Its use in garments is growing: for example, in lining
the cups of brassieres.

Surfboards made out of Polyurethane foam - Some surfboards are now made out of 2LB Polystyrene foam

The precursors of expanding polyurethane foam are available in many forms, for use in insulation,
sound deadening, flotation, packing material, and even cast-in-place upholstery padding. Since
they adhere to most surfaces and automatically fill voids, they have become quite popular in these applications.