Static molds – Mold element
Reexamination Certificate
1999-03-23
2001-03-20
Friedman, Carl D. (Department: 3635)
Static molds
Mold element
C249S018000, C249S026000, C249S189000, C249S190000, C249S195000, C052SDIG004
Reexamination Certificate
active
06202978
ABSTRACT:
TECHNICAL FIELD
This invention relates to a side wall system for a concrete casting mould including a side part which is removably attachable to a casting bed by means of one or several magnets.
BACKGROUND ART
Removable sides which are provided with different kinds of fastener arrangements for a casting mould for elements to be cast from concrete have been disclosed in the prior art. These sides can be placed in desired positions on the casting bed, depending on the size and on the shape of the piece to be cast.
Usually, when casting wall elements from concrete, a table mould, i.e. a tilt mould with side walls, is used as the horizontal mould. A casting machine moves above the table and applies a certain amount of mass into the mould. Once the concrete is hardened, the table is tilted about a tipping shaft provided on one side, almost into an upright position. That side wall of the mould that ends up in the upper position is removed and the element is lifted away from the table using loops provided on its sides. The position of the upper side wall has to be alterable according to the size of the element to be cast. Removable side walls can be used for this purpose.
Furthermore, removable and adjustable side parts enable door and window openings to be formed in desired places in the element.
Use of magnets for fastening of removable element sides is well known in the art. They are very suitable for the fastening of a side as they fasten to the smooth steel surface of the casting bed. In order to fasten the side tightly, strong magnets generating an adhering force of 15 kN, for example, have to be used. However, fastening of the magnets to the casting bed and removal of them therefrom after casting may be quite difficult in some systems.
DISCLOSURE OF INVENTION
The side wall system according to the invention is characterized in that
the body of the magnet part that carries the magnet includes a pivoting shaft about which the magnet part can be pivoted into a lower position wherein the magnet is fastened to the casting bed, and into an upper position wherein the magnet is spaced from the casting bed,
the side part includes a holder on which the pivoting shaft of the magnet part can be hung in such a way that it can be pivoted between its lower and upper positions, and
the holder has a mounting face to which the upper surface of the magnet can be fastened by means of the magnetic force when the magnet is pivoted into its upper position about its pivoting shaft.
The invention provides a side wall arrangement assembly including a fastening system that is as generally applicable and easy to use as possible irrespective of what shape the side is or what kind of equipment automation is used. In the system according to the invention it is possible to use readily available side and magnet parts ex stock which are easy to combine in order to equip the system. In addition, the arrangement meets the requirements made of it as far ergonomics and automation are considered (light, smooth surfaces, easy to clean, robotics handling). The system is a suitable arrangement for side and opening moulds for all the present products of different thicknesses manufactured in the concrete industry.
The system according to the invention consists of three standard components, i.e. of a side wall, of a fastening magnet and of a release lever.
The entity formed by a side and a magnet according to the invention is light, compact and easy to use. It can be used in different ways, i.e. the magnet can be fixed to the side or it can be loose. The side can be fastened and removed easily and quickly. The system is simple and reliable.
REFERENCES:
patent: 3730657 (1973-05-01), Malet et al.
patent: 5273251 (1993-12-01), Badstieber
patent: 5277396 (1994-01-01), Vappula
Addtek Research and Development Oy AB
Burns Doane , Swecker, Mathis LLP
Friedman Carl D.
Syres Christy M.
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