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- links
- a basic guide to foamboard modelling *
- a basic guide to hot wire cutting - making a template *

* Disclaimer Although care has been taken in preparing the information contained in these guides, 4D modelshop does not and cannot guarantee the accuracy thereof. Anyone using the information does so at their own risk and shall be deemed to indemnify 4D modelshop from any and all injury or damage arising from such use.

 

Junior Open House - Open House is an educational charity that promotes architectural awareness through direct access, experience and debate. The scheme gives school children the chance to visit some of London's more notable buildings and chance to talk to the architects who shape our cities.

Meetings with Buildings - a London Open House site - a progressive list of buildings of architectural note from 1900 onwards plus details of how to 'meet' these buildings.
Papertoys.com - this site contains a large number of model templates to cut out and construct 3-dimensional objects such as cars and buildings. Many of the plans are available as downloadable .pdf files.
Big Ben Model Kit - a kit designed for Key Stage 2 Design & Technology projects. Big Ben model kit instructions
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A basic guide foamboard modelling
Foamboard modelling is a technique used throughout the model making industry to construct quick and easy models of proposed buildings. Many architectural practices use this method to illustrate ideas they have about a proposed development.
1. Setting out the elevations
Firstly plot out the different elements of your design that will make up the 3 dimensional model. This can be drawn on computer and printed out or by hand onto paper which is then spray mounted onto the foam board. Alternatively the design can be drawn directly onto the foam board. Drawing the design on computer easily allows extra detail to be added such as brick patterns.
2.Spray mounting


If your elevations are on paper it is best to spray mount them onto the foam board. Spray a light even coating onto the back of the design, let the glue become tacky then apply the paper to the foam board working from one end smoothing out any trapped air. For a very strong adhesion of the paper to the board use the spray mount as a contact adhesive by spraying both the paper and the board allowing the glue to become touch dry before sticking together.

3. Cutting out the elevations
Place the foam board onto a cutting mat then cut out the elevations by holding the steel rule firmly on board and holding the scalpel fairly upright. Make a cut through the top layer of card then repeat several times until you have cut all the way through the board. You are much less likely to cut yourself by making gentle cuts rather than trying to cut all the way through in one go. Remember to try and keep the scalpel as vertical as possible so your cut leaves a right angle between the top surface and the cut edge. Repeat until all the elevations are cut out.
4. Gluing the elevations together
To glue the elevations together use the UHU glue as a contact adhesive. Run the glue down one surface touch it onto the other surface then quickly pull apart. Allow the glue to become touch dry then firmly place the elevations back together. This will form a strong joint. Repeat this process until you have completed your design.
5. Tip for a stronger and neater joint
When you cut out the elevations on one side of the joint cut away the thickness of the board but only cut through the top board and the foam leaving the bottom board uncut. Then glue together as before. This will give a greater gluing area and a concealed joint. If you are using this method an allowance needs to be made on the elevations.
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A basic guide to hot wire cutting - using a template
1. Making a template

You can either draw your template directly onto stiff card or draw your design on a computer, print out the design and glue it onto the card.

f gluing the template onto the card spray glue is usually the easiest method of gluing. Spray a light even coating onto the back of the design and onto the card, let the glue become touch dry then apply the paper to the card working from one end smoothing out any trapped air. Using spray glue as a contact adhesive will give a very strong adhesion of the paper to the card.

Cut out the template using a steel rule and craft knife on a cutting mat for the straight edges and scissors for the curved edges.
2.Using the hot wire cutter

Before you start you need to check the hot wire cutter is set up correctly.

  • Make sure that the wire is under tension and not loose.
  • Make sure that the wire is set at right angles to the cutting bed.
  • Set the temperature control to the correct setting for the thickness of the material you are cutting.


Then using the guide on the hot wire cutter cut the styrofoam to width, length and height required.

Now pin your cardboard template onto the foam and cut out the details of the design.

note: When cutting the foam try and make sure that you use one smooth movement as you pass the wire through the foam. The temperature of the wire will determine the speed that you can cut through the foam, you need to find the optimum cutting speed.
Cutting slowly will melt the foam too much causing uneven edges, where trying to cut too fast will distort the wire and could also cause it to break.
Use some scrap pieces to get the feel of the cutter before start.

3. Finishing the foam
You can now tidy any uneven areas on the styrofoam using a craft knife and a sanding board.
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