Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work cooling means
Patent
1988-01-07
1990-10-23
Hoag, Willard
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work cooling means
100 93P, 1562831, 165 64, 219243, 249 78, 249 79, 425384, 425DIG13, B29C 4332, B30B 1506
Patent
active
049649434
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention is directed to a device for thermally joining at least two parts, especially ends of conveyor belts, with pressure plates provided with heating- and cooling elements on the inside.
BACKGROUND ART
Conveyor installations operating with conveyor belts must frequently change their position for instance in open pit as well as underground operation, for instance if a region to be stripped advances slowly in the working zone and the conveyor means must follow this advance movement. This involves cutting the belts, re-erecting the installation and joining the ends together again, for which purpose heatable pressure plates are utilized, as they are known from the species defining DE-AS No. 27 27 300 of the applicant.
DISCLOSURE OF INVENTION
These already very satisfactory pressure plates, and this is the task of the invention, are to be further improved, especially as far as their economical fabrication is concerned. The appliance utilized for the vulcanizing process is to meet at least the criteria as they are already described in the species defining DE-AS No. 27 27 300. On the one hand it must achieve an optimum heating output, on the other hand it must also be able to be cooled advantageously. The device in the invention fulfills this in a particularly optimum manner due to its basic construction.
In order to for instance be able to appropriately locate heating conductors, the invention also provides that at least a portion of the channels formed by the profiling are connected with each other by arc-shaped channels in their front end regions. Thus a plurality of location patterns for instance for electrical resistance wires are available. These can be laid in undulating shape, in meandering shape from the inside towards the outside in several loops, which can then possibly be energized electrically in different ways, and more of the same. The arc-shaped connection of the individual channels with each other must not necessarily be achieved by separate components. Here grooves fashioned in the aluminum rods can also be fabricated in an arc-shaped manner, possibly by milling or the like.
The invention provides in another refinement that the channels formed by the sections are partially at least equipped with resistance heating elements, which are fixedly arranged in these channels however possibly so as to be longitudinally displaceable. It has been shown to be practical if the channels are designed to be essentially semicircular in cross-section, to insert the resistance heating elements into the base of the thus formed channel to seal the open trough oriented upwards devoid of any air with a bar section, for instance by squeezing. With this the resistance heating element is gripped so as to be entirely fixed as far as its location is concerned. Depending upon the area of application, a longitudinal mobility for the resistance heating wire can also be provided within the hollow channel formed in such a manner.
The invention provides in another embodiment that at least one longitudinal channel for receiving a resistance element and an additional longitudinal channel spatially separated from the first longitudinal channel for forming a cooling duct is provided in a bar-shaped aluminum section. Naturally several channels can be fashioned in one single aluminum section. The profile shape particularly on the longitudinal edge of such light metal sections can be chosen in such a way, that a complete channel is formed by placing the sections next to each other, possibly if the longitudinal edges are provided with a quarter-circular shaped phase, so that a semicircle for instance as a cooling duct is formed if the sections are placed next to each other.
The invention however is not limited to only arc-shaped channel or groove cross-sections. It can be equally provided that the channels or longitudinal grooves as far as their cross-section is concerned are designed to be triangular, quadrilateral, rectangular, polygonal and/or shaped like a circular segment or from mixed shapes of thes
REFERENCES:
patent: 259054 (1882-06-01), Seely
patent: 829808 (1906-08-01), Shipp
patent: 1415550 (1922-05-01), Hadaway
patent: 1758703 (1930-05-01), Johnson
patent: 1984008 (1934-12-01), Baker
patent: 3393292 (1968-07-01), Ritscher
patent: 4278877 (1981-07-01), Werych
patent: 4295628 (1981-10-01), Kupf et el.
patent: 4408520 (1983-10-01), Wons et al.
patent: 4501951 (1985-02-01), Benin et al.
patent: 4703154 (1987-10-01), Ikegami et al.
Webstes 7th Colligate Dictionary Merrian Webster, Springfield, pp. 40 and 589.
Kruger Manfred
Schulte Strathaus Franz-Erich
F. E. Schulte Strathaus KG
Hoag Willard
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