Severing by tearing or breaking – Methods
Patent
1995-11-14
1998-04-07
Rachuba, Maurina T.
Severing by tearing or breaking
Methods
225 97, 225103, 493373, B26F 302
Patent
active
057354421
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device, a clamping tool and a process for breaking away cuttings when cutting out blanks from cardboard in an automatic cutting press,
having a matrix, whose openings are slightly larger than the cuttings to be broken away,
and with cyclically vertically movable breaking away tools arranged above the matrix,
as well as cyclically vertically movable clamping tools below the matrix for gripping and separating the cuttings in conjunction with the breaking away tools.
The breaking away tools can be constituted by breaking away shafts or equivalent punches or the like which can be engaged from above on the cuttings.
DE-U-90 03 329 describes a device of the aforementioned type for breaking away blanks. The clamping tools are abutments, which are arranged in movable or resilient manner within the particular opening. In their inoperative position the abutments engage below and roughly parallel the cuttings which are located in the cardboard sheet. On moving the cuttings through the breaking away tools, particularly the breaking away shafts, the cuttings can be brought into an inclination angle with respect to the cardboard sheet. In the different embodiments the abutments are formed by one or more tongue-like springs, portions of one or more rotary bodies or by elastic noses or bristles.
JP-A-4 201 100 describes a device for breaking away blanks during the cutting out of cardboard in an automatic cutting press. The device has a flat support plate, which has on its top surface a sponge-like, flat, elastic layer. The device operates cyclically. The flat, elastic layer is movably arranged on the support plate in the vertical direction below a matrix.
In known high speed automatic cutting presses for cutting or punching cardboard sheets, e.g. for producing cardboard boxes, the cuttings left behind after the cutting process between the cardboard blanks are held on small cardboard bridges, so that the cuttings do not drop onto the cutting plate and can consequently not impede the following cutting or punching process. The cut cardboard sheet, which is still adequately adhering to the cardboard bridges, then passes by means of gripping devices into the breaking away station of the automatic cutting press, in which the blanks from the cardboard sheet are cut out and drop into a waste container. During the breaking away process the cut cardboard sheet is so positioned on a matrix, that its openings are congruent with the cardboard sheet cuttings. The blanks are now gripped or clamped by a breaking away or clamping tool moved up from above or below in the form of breaking away shafts and facing the same, usually resiliently mounted clamping pins and during the joint downward movement of the two tools are pressed through the matrix opening and consequently broken out of the cardboard sheet. Whereas the tool with the clamping pins moves further downwards to ensure an effortless removal of the broken away blank cuttings, the breaking away shafts move immediately upwards again so as to permit the supply of the following cardboard sheet.
There are admittedly breaking away station of the automatic cutting press, in which the blanks from the cardboard sheet are cut out and drop into a waste container. During the breaking away process the cut cardboard sheet is so positioned on a matrix, that its openings are congruent with the cardboard sheet cuttings. The blanks are now gripped or damped by a breaking away or clamping tool moved up from above or below in the form of breaking away shafts and facing the same, usually resiliently mounted clamping pins and during the joint downward movement of the two tools are pressed through the matrix opening and consequently broken out of the cardboard sheet. Whereas the tool with the clamping pins moves further downwards to ensure an effortless removal of the broken away blank cuttings, the breaking away shafts move immediately upwards again so as to permit the supply of the following cardboard sheet.
There are admittedly breaking away devices in which there are no cla
REFERENCES:
patent: 3206088 (1965-09-01), Meyer et al.
patent: 3303979 (1967-02-01), Lang
patent: 3552615 (1971-01-01), Murray
patent: 3670791 (1972-06-01), Johnson
patent: 4964555 (1990-10-01), Hnatuk
patent: 5179882 (1993-01-01), Takeuchi et al.
patent: 5181640 (1993-01-01), Vossen et al.
patent: 5353978 (1994-10-01), Varidel et al.
LandOfFree
Device, clamping tool and process for breaking away cuttings whe 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, clamping tool and process for breaking away cuttings whe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device, clamping tool and process for breaking away cuttings whe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-6181