False formwork for moulding concrete panels

Abstract

A false formwork system (40) includes a plurality of sideforms (17) which are able to be interconnected to define a perimeter of an opening in a panel to be cast. A support structure (24) is carried by the sideforms (17) for supporting components (26) used to mould a false skim coat overlying the opening when the panel is cast. An opening demarcation portion (21) is carried by each of at least some of the sideforms (17). Each opening demarcation portion (21) defines a zone of weakness to demarcate the skim coat of the cast panel from a remainder of the panel and to facilitate removal of the skim coat from the remainder of the panel by breakage along the zone of weakness.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority from Australian Provisional Patent Application No 2006906335 filed on Nov. 14, 2006, the contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates to formwork for use in the construction of concrete panels, in particular tilt-up wall panels, where the panels are cast in a stack one on top of the other. More specifically, the invention relates to false formwork for producing tilt-up concrete wall panels in which window or door openings are formed and to a method of casting a concrete panel.BACKGROUND TO THE INVENTION[0003]In traditional formwork methods in the moulding of a concrete wall panel, in situations where a window or door opening is required to be formed in the panel, it is common practice for false formwork, normally constructed of timber, to be installed within the panel mould so that the false formwork defines the opening to be formed. The f...

AI Technical Summary

Benefits of technology

[0024]The method may include casting a further panel on the panel previously cast in substantially the same manner as the panel previously cast and using the previously cast panel as the base for the further panel to be cast, the uninterrupted upper surface of the panel previously cast facilitating a lack of an imprint in a lower surface of the further panel.

Problems solved by technology

Such a procedure would not be suitable for casting concrete panels which are to have window / door openings formed therein, one on top of the other, mainly due to formwork imprints being left on the cast face of the upper panel.

Another disadvantage with known timber false formwork is that all of its components become waste product due to the fact that they cannot be re-used for moulding another concrete panel.

Still further the installation of the timber false formwork must generally be carried out by a skilled person, e.g. a carpenter, which adds to the overall cost of moulding the panels.

Images