CLICK HERE FOR INDEX PAGE

 
     
 

ADHESIVES FOR WOODS

 
     
 

V. Ryan © 2001 - 2008

 
     

When you manufacture a product using woods it will soon be necessary to join parts together. This can be done using fixings such as screws, nails and pins OR through the use of glues. Modern glues are very strong and if adverts on TV are to be believed, joints made with glues can be stronger than the wood itself.
Traditional Glues - Glues were once made from natural materials such as animal hides and bones. They were boiled to produce a brownish coloured jelly which slowly solidified. This was called ‘scotch glue’ and it could be warmed up later and used as a liquid glue.
Modern Glues - P.V.A. (Polyvinyl Acetate) Glues are very popular as they do not need preparation. These glues are supplied in a plastic container and can be used straight away. A good example of this is ‘Evo-stik Woodworkers Resin’.

     
 

SEQUENCE DRAWING - APPLYING PVA ADHESIVE

 
     

Produce a sequence drawing which clearly shows the stages involved in using PVA to join two pieces of pine. An animation is shown below (click here for example sequence drawing)

     

WHEN STAGES ABOVE ARE COMPLETE THE

PIECES ARE CRAMPED TOGETHER AND LEFT

FOR TWENTY FOUR HOURS

 

 
 

 

 

PDF FILE - CLICK HERE FOR PRINTABLE VERSION OF EXERCISE SHOWN BELOW

 

 

 

     

1. Describe / explain a traditional adhesive.
2. Draw a glue gun and explain how it works, including safety factors.
3. Demonstrate the use of PVA adhesive to a group of pupils.

     

CLICK HERE FOR RESISTANT MATERIALS INDEX

     
 
Google
 
Web www.technologystudent.com