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Terminology - Fabrication Methods
When the PVC profile (i.e Mullion, Transom, Outerframe) are fusion welded to Welded Joint
each other to create a air tight / water tight joint. This method can be used on
both internally and externally glazed products.
Used generally on an internally glazed product, again the fusion weld Reverse Butt Weld
Process is used to join the profiles together. This joint is required when the
rebate of the product needs to be swapped (reversed) in order to
accomodate a sash for example.
This joint involves the end milling (shaping) of the transom / mullion for Mechanical Joint
example and then fixing into position using brackets and screws. No weld
process is used on this joint type.
A series of routed / drilled slots made in the PVC profile which allow any Drainage
water that has got into the product to pass through and dispersed to the
outside face.
A series of slots again routed or drilled in the PVC profile which prevent warm
air pressure build up within the cavities of the extruded profile. These slots Air Equalisation
also work in conjunction with the drainage, the flow of air pushing the water
out of the desired drainage slot.
The excess / build up of PVC material created when the products are welded “Sprue”
together and thus causing an uneven surface to the corner joint.
Also known as “raised nib”, this cleans away any sprue which has occured Knifing
after the weld process leaving a 0.5mm upstand of PVC material. Can be
carried out using a specialized hand tool or by machine.
Method used to clean the exposed faces of the profile welded joints. Grooving
Grooving removes the “sprue” and leaves a 3mm wide by 0.5mm deep
groove.
The process of cleaning the outerframe and sash welded corner joints. The
“sprue” which has buildt up on the corner is removed with the use of a cutter Corner Cleaning
and the e cleaned to leave either a grooved or knifed finish. Can be carried
out using a specialized hand tool or by machine.
When a bay or bow windowis produced the cill will need to be cut and
connected at the angle of the window. Fusion welded to each other to create Welded Cill
a air tight / water tight joint, This method can be used on both internally and
externally glazed products.
Routing Use of specialized mechanical tooling which cuts a slot / hole into the PVC profile. I.e Drainage holes, Pressure equalisation, hardware preparation.
Glazing The method of fitting and fixing the glass pane into the PVC window frame with the use of gaskets and beading.
A flexible hard wearing rubber compound used in both outerframe and sash Gaskets / Q -Lon
profiles to create a weathertight seal for both the glass once fitted and the
sash profiles when in the closed position.
Security / Glazing Clip A security device which is screw fixed into the glazing rebate during the glazing process which stops the pane of glass being removed.
The use of plastic shims which are positioned underneath the glass during Packing
the glazing procedure to prevent the pane of glass moving / slipping.
Issue: 2 (January 2008) 4.1
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