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Running MouldsRunning Moulds

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Learning OutcomesLearning Outcomes

• To be able to identify members of the running To be able to identify members of the running mouldmould

• Describe a cornice mouldDescribe a cornice mould• Raise awareness of the hanging mouldRaise awareness of the hanging mould

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All mouldings consists of members these are a combinations of curved and straight lines .Each member is separated by a straight sections known as fillet.

Ovolo

The word Ovolo means convex or a quarter rounds.

In order to draw this member the compass must be placed here.

Cavetto

The word Cavetto means concave.

In order to draw this member the compass must be placed here.

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A

A

B

Cyma Recta

The word Cyma means moulding of double curvature.

When the concave part is the uppermost it is called cyma recta.

In order to draw this member the compass must be placed in two locations A , B.

Cyma Reversa

When the convex part is at the top it is called the cyma reversa.

In order to draw this member the compass must be placed in two locations A , B.

B

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Torus

This word Torus meansConvex semi – circular moulding.

In order to draw this member the compass must be placed here.

Scotia

This word Scotia means Concave moulding with the lower edge projecting beyond the top.

In order to draw this member the compass must be placed in two locations A , B.

A

B

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The projection

The distance the cornice mould projects from the ceiling angle to the nib of the mould is known as the projection.

The Depth

The distance from the ceiling angle to the slipper is known as the depth.

The Cornice Mould

The cornice is the moulding that runs between the ceiling and the wall and it provides a break between two surfaces. The cornice is the most predominant of all the moulding and is often referred to as crown moulding.

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Template for a cornice mould

Projection

Depth

This point runs on the ceiling

This point runs on the wall

Drilled holes for fixing to the stock

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Angle Mould

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The Twin Slipper mould ..

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The Hanging Mould

Lintel

Template

Stock

Running Rule

Slipper and Rabbit

Plaster Face

Side Brace

Hanging moulds are used for the undersides of beams and other larger decorative mouldings. It is recommended that the moulds be made much stronger than normal and also it is better to use a hanging mould to reduce the stress downwards on the plaster.

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Peg MouldA mould run on a curved rule is known as a peg

mould.

An Elliptical Arch can also be run with a peg mould .

In order to do this you must build a timber template and fix it in the middle of the Arch.The Peg Mould can then ride on the timber template and form the elliptical arch.

Dowell Pegs

Peg Mould Plan view

Peg Mould Rear view

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The stock will provide strength for the template and is fixed in the centre of the slipper.

Before fixing securely, ensure that the stock is square to the slipper.

The Slipper is the next piece to be constructed.This will be the piece that will run along the running rules and carry the stock.It is very important that the Slipper is a very flat piece of timber that will not warp.

The last piece of timber to be attached is:

The Brace, this will provide strength and keep the stock square to the slipper.

The template

The Template is the first part of the running mould to be construct is the template sometime called the profile; these are normally made of zinc, or aluminium or soft metal that will be easy to work.

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The panel mould is used mainly for running panel or dado mould.

It can be attached to a gig stick for running circular or curved work.

The template is made from either zinc or aluminium. The stock can be made of 3/4 ply wood.The slipper should be made of good quality 4x1 soft wood.

The Panel Mould..

Stock

Template

Gig Stick

Brace

Slipper