Cutting – Other than completely through work thickness or through work... – Combined types of cutting
Patent
1997-12-22
2000-09-19
Rada, Rinaldi I.
Cutting
Other than completely through work thickness or through work...
Combined types of cutting
834253, 83858, 83914, 83945, 83946, 83952, B26D 1100
Patent
active
061195723
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a device for mechanical separation of workpieces having plastic material in the area of separation, in particular packages for flowable media joined together in pairs in the area of the head, with feed and discharge means with guide rails and drivers and with separating cutters arranged on the conveyor belt.
2. Description of the Related Art
It has already been proposed to use an approximately 10 cm long belt provided on one edge with a cutting blade for mechanically separating workpieces, in particular packages for flowable media deep-drawn from plastics material, which belt is moved from one roller past the cutting point to another roller, while the newly manufactured packages for flowable media are conveyed at right angles to the direction of feed of this separating belt. During tests it has been shown that it is very difficult to separate several packages in one operation, although it was indeed possible to use the separating belt provided with teeth for sawing through, but when a smooth blade without teeth was used, separation was particularly difficult when a joining seam or the like which was to be sawn through or cut through was not straight, but instead at the same time had other contours which also had to be separated, for example when cutting has to be done through the middle of an opening means. The precise guiding of the thin separating belt along the cutting plane was problematic. Although the problem of good guiding of the separating blade was recognized and guide cheeks provided, they had to be arranged in a moveable manner and constructed in a costly manner and could not keep the separating belt in the right place along the long path between the two dispensing rollers and guide it continuously and precisely without interruption because of its unstable movements.
BRIEF SUMMARY OF THE INVENTION
The object of the invention is to provide a device of the type described in the introduction, with which a plastics body with a very varied contour can be precisely separated from a corresponding opposite body made from plastics along as smooth a separating surface as possible and largely without deformation of the plastics body.
This object is solved according to the invention in that in the conveying direction of the workpiece a first linear cutter with cutters arranged in pairs symmetrically with respect to a plane of symmetry, each with straight cutting blades, is followed by a round cutter with rotatable circular cutters arranged symmetrically in pairs with respect to the plane of symmetry, that the cutters, each with straight cutting blades, are located in the cutting plane perpendicular to the plane of symmetry and the straight cutting blades are at an angle to the plane of symmetry such that the cutting blades get closer together in the conveying direction. With the device according to the invention, a linear cutter is combined with a round cutter and can be said in this way to share the task of separation. The linear cutter provides the separation of all the surfaces which are located outside the plane of symmetry, while the round cutter cuts where the plastics parts are located in or in the immediate proximity of the plane of symmetry.
The device according to the invention can be used wherever workpieces have plastics material in the area where they have to be separated from one another. For better illustration, however, in the present instance packages for flowable media are described and the device according to the invention is described with reference to the processing thereof, although the invention is clearly not limited to packages. The packages for flowable media described in concrete terms herein are those which are moulded entirely from deep-drawable plastics, and are composed of two halves which are sealed along a common flange or joining seam to form the cavity of the package. There are packages for flowable media of this type in which the pouring aperture is located in the area of the joining seam.
REFERENCES:
patent: 2732619 (1956-01-01), Labine
patent: 3171452 (1965-03-01), Nyden
patent: 3377896 (1968-04-01), De Corta
patent: 3429211 (1969-02-01), Pelot
patent: 3448648 (1969-06-01), Magruder et al.
patent: 3759122 (1973-09-01), Lane et al.
patent: 3850354 (1974-11-01), Held, Jr.
patent: 4015497 (1977-04-01), Burgess
patent: 4058150 (1977-11-01), Pennington
patent: 4310112 (1982-01-01), Huss
patent: 5101703 (1992-04-01), Tanaka et al.
Bub Heiko
Korus Bernhard
Pusch Gottfried
Reil Wilhelm
Goodman Charles
Rada Rinaldi I.
Tetra Laval Holdings & Finance S.A.
LandOfFree
Device for separating packages for flowable media does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for separating packages for flowable media, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for separating packages for flowable media will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1061354