BE1025481B1 - Pre-cut sheet waste disposal rod support for die-cutting machine - Google Patents

Abstract

The carrier (20) comprises two upper (21) and lower (22) counterbore guide bearings (23, 24) secured to each other by spacers (29, 30). The counter-rod (23, 24) slides in two orifices (25, 26; 27, 28) formed in the two bearings (21, 22) in line with each other. The counter-rod (23, 24) comprises, under the upper bearing (21), a bearing ring (31) against the lower face (32) of the upper bearing (21) and a compression spring (33) surrounding the against-rod (23, 24) bearing against the support ring (31) and the lower bearing (22). The support (20) must be mounted on a lower frame of the machine by moving between two low and high positions.

Description

BE2017 / 5909 Support of rods for evacuating waste of precut sheets for cutting forms machine.

The field of the invention is the peeling of precut sheets to form boxes, as used to contain medicines, chocolates and other food products or not.

In the trade, we speak of workshops of cutting forms, of "formists", the peeling consisting, from a rectangular sheet in which the six sides or parts of side intended to form a rectangular box have been traced and precut , to remove the parts of the sheet which are not useful for forming the box and which are called "waste" or "scraps". The sheets in question are generally cardboard sheets, but it can be other materials, including metallic, for making boxes.

Currently, to carry out this dehulling, or extraction of the waste, a pierced board is used as an evacuation template, on which the sheet to be peeled is placed, and upper tips and lower tail tips pinch the waste, therefore precut. , through the holes of the template board before guiding them downwards in an automated evacuation descent which can include a belt, or a tank, or a suction hopper ...

The upper points are arranged on a frame or slats which move between a high position and a low push position. Similarly, the counterweights are also arranged on a frame or slats which move between a low position and a high pinch position. Indeed, the tailstock are mounted in cases on spring to ensure the pinching of waste. These tailstocks are therefore quite complex and relatively expensive and their precise positioning quite delicate, precision being required due to the speed of the dehulling processes which can reach speeds of 8000 sheets per hour.

BE2017 / 5909 Generally, the lower tailstock are positioned and their positioning adjusted manually, which causes a costly loss of time, not to mention production stoppages.

Sometimes the tailstock is assembled mechanically and by laser, but this is a source of additional expenditure on fixed parts which is only worth it for fairly repetitive cutting operations. In any case, a subsequent adjustment of a tailstock, in case a waste does not fall well, is impossible at a lower cost.

The invention of the present application aims to eliminate all the cost problems presented above.

To this end, the invention of the present application relates to a support plate for at least one pinch-off pinch and evacuation of waste of precut sheets for cutting forms machine, comprising two upper and lower bearings for guiding the counter-rod, the two bearings being fixed to one another by spacers, the counter-rod being slidably mounted in two receiving orifices respectively provided in the two bearings to the right of one another, the counter rod comprising, under the upper bearing, a support ring against the lower face of the upper bearing and a compression spring surrounding the counter rod bearing against the support ring and the lower bearing, the plate being arranged for be mounted on a lower chassis of the machine arranged to move between a low position and a high position.

The plate of the invention is very simple and very low cost. The counter rod, which is a simple rod, is locked in the high position against the upper bearing by its support ring, in the low position, by this same support ring against the spring bearing against the lower bearing. The free spring around the counter rod is perfectly accessible to an operator.

Preferably, the plate comprises several counter-rods, all mounted in the same way in two corresponding orifices of the two bearings.

BE2017 / 5909 Advantageously, the orifices for receiving the rod, or rods, have been drilled by laser and by computer.

The invention will be better understood using the following description of a preferred embodiment of the plate of the invention, with reference to the attached drawing, in which:

- Figure 1 is a schematic view of a cutting forms machine;

FIG. 2 is a simplified front view of a decortication module of the machine in FIG. 1 and

FIG. 3 is a perspective view of the plate of the invention fitted to the module of FIG. 2.

The cutting shape machine of FIG. 1 comprises, from right to left, a cutting module 1, the decortication module 2 and, here, a blanking module 3.

These modules are well known to those skilled in the art and they will hardly be described any further, at least as regards the two modules 1 and 3 surrounding the decortication module 2. However, the cutting module 1 includes knives which pre-cut a sheet under pressure, generally made of cardboard, in order to be able, after removing the non-useful portions from the dehulling module 2, to be folded into a rectangular container intended to contain bulk or non-bulk products.

The decortication module 2 comprises, mounted in a rack 4, an upper thrust frame 5 carrying push rods 6 directed downwards, a lower nip frame 7 carrying pinch counter rods 8, 9 directed upwards and a pierced decortication board 10.

For a good understanding of the plate of the invention described below, the description of the operation of the decortication module 2 is not useless.

BE2017 / 5909 The chassis 7 is raised until the cross rods 8, 9 arrive almost at the level of the bottom wall 11 of the board 10.

A sheet 14, previously precut in module 1, arrives on the upper wall 12 of the board 10 to be "peeled" there. To this end, in the plate 10, marking openings 13 have been provided corresponding to the non-useful portions of the sheet. The sheet is therefore positioned on the board in a very precise superposition, the board 10 having to serve as a template for evacuating these non-useful portions (scraps or waste). The chassis 5 is lowered, the rods 6 of which come into contact with the sheet 14 and the chassis 7 is further raised, the counter-rods 8, 9, mounted on a spring, come through the openings 13 of the board 10, pinch the portions of the sheet 14 to be shelled between them and the push rods 6 of the upper frame 5, the springs of the counter rods 8, 9 then being compressed, before, under the push of the rods 6, the unnecessary portions of the sheet 14 detaches from it and, after the descent of the chassis 7, are evacuated through the chassis 7 here in an evacuation tank 15.

The pinch counter-rods of the lower chassis 7 are of two types, but compatible with each other. Are mounted above the rods 8 of the prior art, with spring integrated in a case 16, and against the rods 9 of the plate 20 of the invention which will now be described.

The plate 20, which carries only part of the pushing rods of the chassis 7, has the advantage of an adjustment and an interesting adaptation to the sheets to be peeled, difficult and expensive adaptation with the rest of the chassis. thrust.

The plate 20 comprises an upper bearing 21 and a lower bearing 22, both of guide, in the example illustrated in FIG. 3, of two counter-rods 23, 24 and more than two in the example illustrated in the FIG. 2.

These are two plates extending parallel to each other and, the plate 20 once mounted on the frame 7, also parallel to the plate 10. The two bearings are fixed to one another here by two spacers 29, 30.

BE2017 / 5909

The two counter rods 23, 24 are slidably mounted respectively in two pairs of orifices 25, 26 and 27, 28 respectively drilled in the two bearings to the right of one another. Here, ports 25-28 have been laser and computer drilled.

Each counter-rod has a ring 31, in the form of a bead attached to the counter-rod or protrusion protruding from the counter-rod, intended to come into abutment against the lower face 32 of the upper bearing 21. A spring of compression 33 envelops each counter rod to come to bear, in the upper part, against the ring 31 and, in the lower part, against the upper face 34 of the lower bearing 22. Thus, each counter rod is slidably mounted in its two orifices of guide 25, 26 and 27, 28 between a high position, where it is blocked by its ring 31 bearing against the upper bearing 21 and, in the low position, by its ring 31 bearing against the high turn 35 of its spring at l compressed state, pressing against the lower bearing 22 by its lower turn 36. Each counter-rod, by a portion 37, projects upwards out of the upper bearing 21, in order to be able to pinch the portions of the sheet 14 to be peeled against the push rods e 6 of the upper chassis 5, the counter-rod portions 37 being intended to be introduced into the locating openings 13 of the board 10.

The plate 20 is fixed to the lower chassis 7 by uprights 38.

The plate 20, mounted on the lower frame 7, can therefore move between a low rest position and a high pinch position of the sheet portions to be removed.

It will be understood that there can be several types of plate having as many cross rods as desired, especially if we want them to be close to each other, for ease of use depending on the leaves to be peeled. A plate with a single rod is even possible.

Plates have been envisaged comprising plates serving as bearings for the counter-stems. Means other than plates could be envisaged, such as for example brackets or other profiles.

BE2017 / 5909

Disassembly and identification of the plates on their chassis is quick and easy.

The plates of the invention also offer the advantage of being able to be stored easily, without having to dismantle them or by dismantling them to gain storage space.

Thanks to the plates of the invention, most of the decortication module 2 can be produced by CAD (computer-aided design).

Claims (6)

1. Plate (20) support for at least one counter-rod (23, 24) for pinching and removing waste from precut sheets (14) for cutting forms machine (1, 2, 3), comprising two upper (21) and lower (22) bearings for guiding the counter rod (23, 24), the two bearings (21, 22) being fixed to one another by spacers (29, 30), the counter rod (23, 24) being slidably mounted in two receiving orifices (25, 26; 27, 28) respectively formed in the two bearings (21, 22) facing each other, the counter rod (23, 24) comprising, under the upper bearing (21), a support ring (31) against the lower face (32) of the upper bearing (21) and a compression spring (33) surrounding the counter rod ( 23, 24) bearing against the support ring (31) and the lower bearing (22), the plate (20) being arranged to be mounted on a lower frame (7) of the machine (1, 2, 3) arranged to move between a low position and a position on high. 2. Plate according to claim 1, in which the counter-rod is a simple rod (23, 24) locked in the high position against the upper bearing, out of which it is projecting (37), by its support ring (31 ) and, in the low position, by the support ring (31) against the spring (33) bearing against the lower bearing (22). 3. Plate, according to one of claims 1 and 2, wherein there is provided a plurality of rods (9, 23, 24). 4. Plate according to one of claims 1 to 3, wherein the receiving holes (25, 26; 27, 28) have been drilled by laser and by computer. 5. Plate according to one of claims 1 to 4, wherein the bearings are plates (21, 22) extending parallel to one another. 6. Plate according to claim 5, wherein the plates are fixed to one another by spacers (29, 30).