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EXHIBIT 3.18
<Table>
<Caption>
Ontario Corporation Number
Numero de la compagnie en Ontario
913983
(STAMP)
/s/ [ILLEGIBLE] ARTICLES OF INCORPORATION
STATUTS CONSTITUTIFS
Form
Business
Corporations
Act 1. The name of the corporation is Denomination sociale de la compagnie
1962
CAST HOUSE TECHNOLOGY LTD.
Formule
numero 1 2. The address of this registered office is Adresse du siege social
Loi de 1982
sur les
Compagnies
907 Red Bird Crescent
--------------------------------------------------------------------------------------------------------
(Street & Number or R.F. Number & if Multi-Office Building give Room No)
(Rue et numero ou numero de la R.R. et s'il s'agit d'un edifice a bureaux, numero du bureau)
Pickering Ontario L1V5G8
--------------------------------------- ----------------------- ---------------------------------
(Name of Municipality or Post Office) (Postal Code)
(Nom de la municipalite ou du bureau de poste) (Code postal)
Region Durham
------------------------------------------ -----------------------------------------
(Name of Municipality, Geographical Town) of dans le/la (County, District, Regional Municipality)
(Nom de Municipalite, du canton) (Comte, district, municipalite regionale)
3. Number (or minimum and maximum number) of Nombre (ou nombres minimal et maximal)
directors is: d'administrateurs:
Minimum of 1 and a
Maximum of 7
4. The first director(s) is/are: Premier(s) administratuer(s):
Resident
Canadian
Residence address, giving street & No. or R.R. No. or State
municipality and postal code. Yes or No
Adresse personnelle, y compris la rue et le numero, le Resident
First name, initials and surname numero de la R.R. ou, le nom de la municipalite et le Canadien
Prenom, initiales et nom de famille code postal Oui/Non
----------------------------------- --------------------------------------------------------- -------
Christopher J. 907 Red Bird Crescent, Yes
English Pickering, Ontario
LlV 5G8
Avril S. English 907 Red Bird Crescent, Yes
Pickering, Ontario
LlV 5G8
</Table>
5. Restrictions, if any, on business the corporation may carry on or
on powers the corporation may exercise.
Limites, s'il y a lieu, imposees aux activites commerciales ou aux
pouvoirs de la compagnie.
N/A
6. The classes and any maximum number of shares that the corporation is
authorized to issue.
Categories et nombre maximal, s'ily a lieu, d'actions que la compagnie
est autorisee a emettre:
Unlimited number of Common Shares.
7. Rights, privileges, restrictions and conditions (if any) attaching to
each class of shares and directors authority with respect to any class
of shares which may be issued in series
Droits, privileges, restrictions et conditions, s'il y a lieu,
rattaches a chaque categorie d'actions et pouvoirs des administrateurs
relatifs a chaque categorie d'actions qui peut etre emise en serie:
N/A
8. The issue, transfer or ownership of shares is/is not restricted and
the restrictions (if any) are as follows:
L'emission, le transfert ou la propriete d'actions est/n'est pas
restrainte. Les restrictions, s'il y a lieu, sont les suivantes:
The issue or transfer of shares of the Corporation shall require the
express sanction of the Board of Directors signified by a resolution
passed by the Board; provided, however, that in the event of the death
of a shareholder, his or her share may be transferred to his or her
personal representative without the requirement of such express
sanction.
That the number of shareholders of the Corporation, exclusive of
persons who are in its employment and exclusive of persons who, having
been formerly in the employment of the Corporation were, while in that
employment to be, and have continued after the termination of that
employment to be, shareholders of the Corporation, is limited to not
more than fifty, two or more persons who are the joint registered
owners of one or more shares being counted as one shareholder.
That any invitation to the public to subscribe for securities of the
Corporation is prohibited.
9. Other provisions, if any, are Autres dispositions, s'il y a lieu
The Directors shall have the right by resolution at a properly constituted
meeting to vary their numbers provided the variance is between the minimum
number and maximum number provided in the Articles of Incorporation or any
Articles of Amendment.
10. The names and addresses of the
incorporators are
Nom et adresse des fondateurs
First name, initials and Full residence address or
surname or corporate name address of registered office or
Prenom, initiale et nom of principal place of business
de famille ou denomination sociale giving street & No. or R.R. No.
municipality and postal code
Adresse personnelle au complet,
adresse du siege social ou
adresse de l'etablissement
principal y compris la rue et le
numero, le numero de la R.R.,
le nom de la municipalite et
le code postal
Christopher J. English 907 Red Bird Crescent,
Pickering, Ontario
L1V 5G8
Avril S. English 907 Red Bird Crescent,
Pickering, Ontario
L1V 5G8
These articles are signed in duplicate Les presents statuts sont signes
en double exemplaire.
Signatures of incorporators
Signature des fondateurs
/s/ CHRISTOPHER J. ENGLISH /s/ Avril S. ENGLISH
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Christopher J. English Avril S. English