Manufacturing container or tube from paper; or other manufacturi – With cutting – breaking – tearing – or abrading – By reciprocatory tool
Patent
1998-05-12
2000-12-19
Hail, III, Joseph J.
Manufacturing container or tube from paper; or other manufacturi
With cutting, breaking, tearing, or abrading
By reciprocatory tool
493 74, B31B 116
Patent
active
061621617
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention refers to a splitting machine for sheet materials and in particular to a splitting machine for corrugated board profiles.
BACKGROUND OF THE INVENTION
Corrugated board profiles for packagings, at the end of the various working steps and before being palletized and afterwards shipped, can appear under the shape of moving stacks usually composed of 20.div.40 corrugated board sheets. Each one of these sheets can be composed of a plurality of elementary profiles, already die-cut into their final shape, but kept together by a plurality of junction points, these points having been obtained by suitably profiling the hollow punches when die-cutting. Since working is at the end, it is necessary in this step to separate the different stacks of elementary profiles one from the other, by breaking these junction points.
In order to carry out such splitting operation, two major types of splitting machines are known in the art. The first type is the object of document EP-A-0 404 909, that discloses a splitting machine for profiles provided with the following features: (a) the stacks of profiles to be splitted come to the splitting station and stop there; (b) the stacks are blocked between a pair of small presses; (c) splitting occurs through a breakage due to two following traction actions along the sheet advancement direction. This splitting machine needs several operating steps and the procedure is long, being because it is necessary to stop the advancing stacks, lock them, split them, unlock them and make them start again: this machine is therefore scarcely suitable for workings where a high production throughput per time unit is required.
The second type of splitting machine is commercially available from the Pallmac company and provides a hinged and rotating device that splits the stacks by exerting thereon a force from the top downwards while it is kept rotating. This splitting machine too, though needing a lower splitting pressure with respect to the previous one, requires an even longer operating time than the first machine, because it is necessary to stop the advancing stacks, lock them, rotate the splitting device, take back the device to a rest position, unlock the stacks and make them start again.
Moreover, all types of prior art splitting machines exert the splitting action on a single line that is perpendicular to the stack advancement direction; it is therefore impossible to separate stacks composed of profiles of a particular shape (for example "L"-shaped and "inverted L"-shaped) that are kept joined together for practical purposes and for production efficiency. For this reason, the stacks must be manually splitted at the end of all workings.
SUMMARY OF THE INVENTION
Object of the present invention therefore is solving the above prior art problems, providing a splitting machine that splits stacks of corrugated board profiles while they are moving and without having to stop them, practically without adding working steps apart from the splitting operation itself.
A further object of the present invention is exerting a splitting action by means of a splitting device of the "ram" type, but with an efficient and relatively low splitting force.
Another object of the present invention is being able to "decompose" the splitting device into two parts that are offset by 180.degree. one from the other in order to be able to split stacks of profiles with particular shapes, joined together through junction lines that are located on two straight lines that are perpendicular to the stack advancement direction.
Through these arrangements, the splitting machine for corrugated board profiles of the present invention allows high stack advancement speeds and therefore high production throughputs per time unit, and guarantees an efficient splitting between stacks of profiles that are both very high and with particular shapes, being suitable for all types of workings required by modern packaging industries.
The above and other objects and advantages of the invention, which wil
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Hail III Joseph J.
Texo S.R.L.
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