Mould Price Guide
| Small round flat 1" washer
|Plain shaped 10 oz drinking tumbler
|12-cavity mould to make tea spoons
|Front surround of your PC monitor.
|Beer jug (pitcher)
|Milk bottle crate
Please note that these are estimates only.
OK, maybe I don't need injection moulding
For production quantities of less than several thousand parts, there
may be other manufacturing processes more cost affective than injection
Model makers such as Cumberland Patterns Pty. Ltd in Sydney NSW (Telephone
02 9602 6648) are able to fabricate small quantities of plastic parts.
You could also try Plastic Fabricators or Fibreglass Fabricators;
several of which are listed in the Yellow Pages.
Yes, I need injection-moulding, how do I proceed?
You may need specialised advice at various stages in bringing your
plasticware to market. For more information on how Pennicook Davison
can help with your project please take a minute to complete our on-line
quote form. Our target response time for genuine inquiries is
within 5 working days.
As can be seen, the initial set-up cost (the design and manufacture
of the mould) to make an injection-moulded part is quite high. That
is why the injection-moulding process is the preferred method when
you want thousands or millions of the same part, not normally when
you want a few or even a few hundred. A well designed and built mould
should make several hundred thousand parts before needing any major
Moulds are built by specialist companies called toolmakers in Australia
(or moldmakers in North America). Many injection-moulding companies
have toolmaking/mouldmaking facilities in-house and are able to build
you the mould as well as mould your parts. Pennicook Davison Pty Ltd
is one such company.
Having had your mould built, you then need to get a custom moulding
company to mould the parts for you. The custom moulding company will
generally charge you a price per part or per thousand parts for very
The price you pay
The price you will pay per moulded part will depend of course on:
- How heavy the part is - injection moulded parts can be as small
as watch springs and larger than car bumper bars
- What material the part is to be made from - there are dozens
of different types of plastics and dozens of grades within each
- How thick the moulded part is
- How accurate the part has to be
- The number of cavities making the same part in the mould
- The quantity of your order - there is normally a set up charge
with each moulding production run.
As a very rough guide, in a single cavity mould, the cost of the
material may be between 30% and 50% of the selling price of the injection-moulded
part. This will vary according to the cost of the material and the
weight of the article. The balance of the price that the custom moulder
charges you for the part is for machine processing time, labour, overheads
and a profit margin.
If the article being moulded is heavy or made of expensive material,
then the material proportion of the final price of the article is
likely to be higher. On the other hand if the article being moulded
is light or made of inexpensive material, then the material proportion
of the final price of the article is likely to be lower.
The cost of plastic material varies greatly according to the type
of properties needed for the application; to a lesser extent the quantity
of material needed for the job; and the part of the world in which
you will be buying the material. For example, the material used to
make plastic buckets (pails) may cost $2-3 per kg; the material for
clear drinking tumblers may be up to $5-6 per kg; the material that
is used in the protective shields in taxi cabs and banks may be around
$8-9 per kg; and you would pay over $50 per kg for high heat and chemical
resistant material for technical and scientific applications.
An illustration of why it is not cost affective to injection mould
for small quantities
Supposing you decide to injection mould a quantity of 50 parts, the
mould maker charged you $20,000 for the mould and the moulder quotes
you $1.00 each to injection mould the parts. The average cost per
part is determined as follows:
Cost of mould $20,000
Cost of parts 50 x $1.00 = $50
Total cost for 50 parts = $20,050
Average cost per part ($20,050/50) = $401
If on the other hand you decide to injection mould 50,000 parts,
the mould still costs you $20,000 and the moulded parts cost is $1.00,
(and in reality it may be less than that because you are likely to
get a cheaper moulding price for ordering large quantities), the average
cost per part is calculated as follows:
Cost of mould $20,000
Cost of parts 50,000 x $1.00 = $50,000
Total cost for 50,000 parts = $70,000
Average cost per part ($70,000/50,000) = $1.40
So you can see that the more parts you make out of a mould, the cheaper
each one gets. For production quantities of less than several thousand
parts, there may be other manufacturing processes more cost effective
than injection moulding. But of course the importance of the cost
effectiveness of the process also depends on how much you can sell
your moulded part for.
Any prices and costs quoted in this article are in Australian dollars
and are very broad estimates presented as guides only.