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27th June 2013, 10:19 PM #1New Member
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Pattern making for mould concrete injection
Hi, just a quick question and if anyone can help point me in the right direction either by replying to this post or PM me.I am looking for someone to create the template from wood for a concrete bollard that I would like to create. Plan is to fill with concrete! Allow to dry and then make another...Height of product would be around 900mm x 300mm with various different shapes such as pyramid tops, square angles and the like...any assistance helpfull.sydney is my locationtas.
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28th June 2013, 01:36 AM #2
how many bollards (of each shape) do you want to make?
if more than 2 or 3, you should be looking at a multi-part steel mould.
Timber will work for one or two, but will start to get expensive as you destroy much of each mold to release the final shape.regards from Alberta, Canada
ian
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28th June 2013, 10:06 AM #3anne-maria.
Tea Lady
(White with none)
Follow my little workshop/gallery on facebook. things of clay and wood.
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29th June 2013, 01:38 AM #4
well this is what he said:
I'm thinking the OP means concrete casting moulds.
Can be done in wood, but a bit of a challenge -- each 900 x 300 (diametre) bollard would weigh around 150kg plus the weight of the mould.
bending ply on the inside of a braced wooden "barrell" might be the way to do it.
Concrete composition, water content and lots of vibration are the key to a decent surface finish off the mould.regards from Alberta, Canada
ian
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2nd July 2013, 08:13 PM #5GOLD MEMBER
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Hi mate. This may be of interest to you. I did a job a while ago for a concrete works down here in Tassie who wanted some moulds for some concrete bollards.They had a few different designs they wanted. I made the patterns for the molds from craftwood (which I hate using). I then spraypainted the patterns with a 2 pac sealer. The patterns then went to a fiberglasser who made the molds from my patterns. Then the concreter made lots (maybe 20-30 for each design) castings in concrete from the molds. The job was for a council project along the river Derwent foreshore. Maybe to stop idiots driving into the river as well as a form of seating.
Pictures show my patterns and finished product.
TIP..... its a tricky job to quote on!
2004_04290047.JPG2004_04290048.JPG2009_04260006.JPG2009_04260007.JPG
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