Conveyors: power-driven – Conveyor system for moving a specific load as a separate unit – System includes a load supported by a conveyor portion which...
Patent
1990-06-01
1992-02-18
Dayoan, D. Glenn
Conveyors: power-driven
Conveyor system for moving a specific load as a separate unit
System includes a load supported by a conveyor portion which...
414331, 198812, B65G 4734
Patent
active
050885928
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a method for conveying and depositing an adhesive, flexible material by means of a flexible base in right side up position and essentially maintaining its shape on a depositing station, whereby the base is supported by a displaceable supporting device equipped with a guiding member, which imparts a direction change to the base, which supporting device at the deposition moves away the base below the material thus that this is deposited by means of free fall.
BACKGROUND OF THE INVENTION
Devices for transport and deposition of certain perishable objects, e.g. cut up slices of sausage, are earlier known from Swiss patent specification 556285. These known devices can not be used when the material concerned is strongly adhering. Such materials may be thermosetting plastics, which in the form of a dosed sticky mass shall be fed into a heated press, where the actual shaping and setting take place. Another example is thermoplastic resins, which in cold condition are in the shape of plates, which are cut up in accordance with the material consumption in the mould and which are thereupon heated to about 200.degree. C., whereupon the mass, which is also sticky, shall be introduced into a cold mould, where the shaping and the setting take place.
It is possible with this method to produce products, ranging from rather small size of some square decimeters to such in the size of several square meters, e.g. at production of entire boat hulls. It earlier has been tried to solve the problem by conveying the sticky mass on a needle bed, but this method has proven itself to be less suitable, as the mass will stick to the needles and will be difficult to remove when to be deposited. There is further big risk that the mass shall become deformed, resulting in the mass not to be evenly distributed in the mould.
The device mentioned in the introduction can neither be used in the design mentioned, as the adherence of the mass is so strong that it will not be released from the belt, but follows this around the pulley at the end of the track, thus that the mass will stick to the lower side of the conveyor belt.
PURPOSE AND MOST ESSENTIAL FEATURES OF THE INVENTION
The purpose of the invention is to provide a method by which very strongly adhering materials, also in very big slabs, may be conveyed and deposited in a mould without the material undergoing any deformation or coming in contact with any lubricant, intended to reduce the adherence to the conveyor belt, which lubricants may influence the mass negatively. It is necessary that the transfer of the material from e.g. a heating oven to the moulding press can be carried out very swiftly, thus that the material has no time to cool before it reaches the mould. This further implies that the conveyor belt must withstand rather high temperatures. These tasks have been solved in that the material is positioned on the base a distance from the delivery end of the supporting device corresponding to the acceleration distance of the base, that one, the rear end of the base is fixedly attached against displacement, that the base is teared away from the contact surface in that it is urged to make an abrupt direction change over a guiding member of small curvature radius (r) at the front end of the supporting device and by the supporting device and portions of the base being simultaneously moved rearwardly, whereby the centripetal acceleration of the base around the curvature radius (r) of the guiding member is at least 1 g when the curved portion of the base is below the material.
DESCRIPTION OF THE DRAWINGS
The invention hereinafter will be further described in form of some embodiments with reference to the accompanying drawings.
FIG. 1 shows a section through a first embodiment of a conveyor and deposition device according to the invention, with the conveyor belt in a forwardly extended deposition station.
FIG. 2 is a section analogous with FIG. 1, but with the conveyor belt in retracted position, after deposition of material.
FIG. 3 shows a second embo
REFERENCES:
patent: 3941278 (1976-03-01), Oglander et al.
patent: 3993189 (1976-11-01), Khoylian et al.
patent: 4194646 (1980-03-01), Oglander et al.
patent: 4607744 (1986-08-01), Pak
patent: 4702365 (1987-10-01), Pak
Dayoan D. Glenn
Institutet for Verkstadsteknisk
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