Metal deforming – By deflecting successively-presented portions of work during... – To form spiral coil
Reexamination Certificate
2001-12-06
2004-04-13
Jones, David (Department: 3725)
Metal deforming
By deflecting successively-presented portions of work during...
To form spiral coil
C072S387000, C242S532500, C242S532600
Reexamination Certificate
active
06718810
ABSTRACT:
The object of the invention is a method and apparatus according to the preambles of the independent claims presented below for bringing elongated metallic scrap into a more compact form.
The method and apparatus according to the invention for bringing elongated metallic scrap into a more compact form is particularly well applicable for collecting metal contained in demolition waste from demolition sites, and for bringing the metal into a form which occupies less space. In this context bringing metal in a more compact form means that the handling and transport of the metal is facilitated, for instance so that parts which are too long in the length direction of the transport vehicle are shaped so that the space they require is reduced and so that they will fit into the transport vehicle. Thus the transformation into a form requiring less space does not necessarily involve a reduction of the absolute i.e. actual total volume of the piece.
On demolition sites where structures typically made of different types of concrete, particularly armed concrete or the like are demolished, such as buildings and bridges, waste is created which in addition to other constituents contains metallic pieces, which are purely metallic or which in addition to the metal contain constituents which were attached to the metal, such as concrete remains. The produced metallic pieces can be collected and transported for instance to a metal smelting plant or a corresponding collection point in order to be reused. However, the metallic pieces produced on demolition sites are typically elongated, possible bent in many directions, and generally they require a large transportation space, so that their transport costs have become considerable and reduced the profitability of recycling metallic scrap.
Typically the above-described problem has been tried to remove by cutting the metal into shorter pieces and thus into a form requiring less transport space. The cutting has been typically made on a demolition site with the aid of metal cutters, welding blowpipes or correspondingly manually and centrally in one point, to which the pieces to be cut have been moved by cranes or the like, or the cutting has been made on the demolition site, at the metal pieces to be cut. The reduction of the transport space required by the metal pieces, made in the described fashion, is slow as the pieces are cut in small batches, mostly one by one. In addition the cutting of metal pieces is sometimes dangerous, because the metal pieces to be cut may be under tension, or during cutting they can otherwise cause danger situations to a person performing the cutting.
Another commonly known manner for bringing the metal contained in demolition waste from constructions into a transport form requiring little space is to move the demolition waste from the demolition site to a centralised point, where metallic scrap collected typically from several demolition sites is pressed into a pile, and from where the metal pressed into a compact form is transported to further processing.
The handling of the metal contained in demolition waste by a pressing apparatus is typically made by transporting a number of metal pieces into the pressing space, and the metal pieces are pressed by cylinders or corresponding other forming devices pushed by actuators, such as presses, into a metal body which is easier to handle and transport to further processing.
The biggest problem in the pressing of metallic scrap like that described above, has been the large space required by the pressing apparatus and the difficulty in moving it. Thus it has not been economically feasible to transport the pressing apparatus to demolition sites, but the waste has been transported to the pressing in a form requiring much space, causing unnecessary transport costs.
Thus, the object of the present invention is to provide an improved method and apparatus for bringing metallic scrap into a more compact form.
In this case the object is to provide such a method and apparatus for bringing metallic scrap into a more compact form, with the aid of which method and apparatus the metal originating at construction demolition sites can be mechanically transformed on the demolition site into a form requiring little transport space.
The object is particularly to provide a method and apparatus for bringing metallic scrap into a form requiring less space, advantageously by bending.
A particular object is to provide a method and apparatus for bringing metallic scrap into a form requiring less space, particularly by bending, which enables the metal to be bent rapidly, efficiently and safely.
A further object is to provide an apparatus for bringing metallic scrap into a form requiring less space, the apparatus bending at least one metallic waste piece into a substantially roll-like coil.
A further object is to provide an apparatus for bringing metallic scrap into a form requiring less space, which apparatus in connection with the bending removes structural parts attached to the metallic scrap, such as concrete blocks, bricks or the like.
In order to attain the above-mentioned objects the method and the apparatus according to the invention for bringing metallic scrap into a more compact form is characterised in what is presented in the characterising parts of the independent claims presented below.
In a method according to the invention elongated metallic scrap is typically brought into a more compact form with an apparatus which comprises a forming member and a driving device for operating the forming member, in which method the metallic scrap to be brought into a more compact form is bent substantially around a bending member, and the bending is made with at least two bending members located substantially adjacent to each other, of which bending members at least one is moved, the metallic scrap for bending being placed between the bending members. In this context metallic scrap means such metallic pieces, which are produced in demolishing different structures, such as buildings or bridges made for instance of concrete, such as armed concrete, or from other material, and which metallic pieces may comprise materials attached to the metal. Such metal pieces are for instance steel, prestressing steel and other reinforcement steel used when concrete is armed. Metallic scrap also means metal pieces of other kind which can be classified as metallic scrap according to their current use or operating characteristics. Such metallic pieces are for instance metal bands and bars used in binding packages and transport loads. Bending member means in this context a member which due to its construction and material is suitable to be used in metal bending. The bending member has such a form that the material to be bent can be bent around the member, for instance a shaft-like or a fork-like form. Bending metallic scrap around the bending member means in this context that after the bending the bending member is at least partly within the space formed by the bent metal body. Driving device means in this context a device, with the aid of which the bending member is moved. The driving device can be for instance an motor or a cylinder or some other actuator. The driving device can be located fixedly in connection with the bending member, or it can be connected to the bending member, for instance mechanically, hydraulically or pneumatically.
The metallic scrap to be bent can be placed, for instance with the aid of a member in the bending apparatus, or manually, or feeding with the aid of a separate machine. Moving the bending member means in this context that the bending member is brought in such a motion that the metal to be bent is bent around one or more bending members.
In an advantageous method according to the invention the bending members are moved by rotating a bending member, which is arranged to be moved, around a bending member, which is arranged to be stationary. In this case the metal to be bent is placed between the bending members and it will bend mainly around the stationary bending member.
In an advantageous method
Jones David
Lydon James C.
Savonlinnan PR-Urakointi Oy
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