EP4729254A1

EP4729254A1 - Machine for interchangeably cutting fabric with a straight or chamfer cut

Info

Publication number: EP4729254A1
Application number: EP24383148.4A
Authority: EP
Inventors: Carles RIBA SOTERAS
Original assignee: Ribamatic Slitters SL
Current assignee: Ribamatic Slitters SL
Priority date: 2024-10-18
Filing date: 2024-10-18
Publication date: 2026-04-22
Also published as: WO2026082994A1

Abstract

A fabric cutting machine capable of a straight cut or chamfer cut, comprising a cutting module (4) with upper cutting bridge (4.1) and lower support (4.2) with at least one saw for cutting the fabric (t), once arranged and tensioned, either with a straight cut (r) or chamfer cut (c). This bridge comprises: either a single moving saw (4.10), tilting, which can be positioned vertically or inclined; or a single vertical saw (4.11) with horizontal sliding; or two saws, one vertical (4.11) and one inclined (4.11'); or two vertical saw types, one single (4.11) and one double saw (4.12). Rollers (4.13) tension the fabric (t) over a head (4.21) of the lower support (4.2) with a flat portion (t1) and two inclined (t2) for straight (r) or chamfer cutting (c).

Description

OBJECT OF THE INVENTION

The invention, as expressed in the statement of this descriptive report, refers to a machine for interchangeably cutting fabric with a straight cut or a chamfer cut, providing, according to the function for which it is intended, advantages and characteristics that are described in detail below, which represent an improvement over the current state of the technique.
The object of the present invention is a machine designed to cut pieces of fabric, normally rolled onto spools, to a specific length, distinguished by the fact that it comprises, among other innovative elements, a support with a tensioning head and a cutting bridge with one or two saws that allow for both straight and chamfered cuts, because it includes at least one saw blade that is tiltable or horizontally movable and/or a double saw blade and the support head together with some bridge rollers, position the area of the fabric to be cut in an inclined position or with a flat central portion and two inclined ones on both sides of it. This allow to perform the straight or chamfered cut according to the selected saw at the ends of the cutting bridge, also comprising the means to release the resulting fabric scrap when a chamfered cut is performed on two sides where the fabric is inclined.

FIELD OF APPLICATION OF THE INVENTION

The field of application of the present invention is framed within the sector of the industry sector dedicated to the manufacture of machinery for cutting fabrics.

BACKGROUND OF THE INVENTION

Machines that cut fabric pieces as they are unrolled from a spool to a specific length are known in the market. These machines usually comprise a cutting bridge where the fabric is positioned and tightened to run a saw or blade over it, cutting the fabric as it slides from one end to the other. However, existing machines to date typically only included one type of saw, usually a single saw that, positioned perpendicularly to the fabric, performs a straight cut.
Some machines are also known toinclude inclined saws or means for positioning the fabric at an angle to perform what is referred to as a chamfer cut.
This chamfer cut is especially used in fiberglass fabrics, for example, for the manufacture of wind turbine blades, where it may be necessary to overlap the edges of the fabric and/or using pieces cut straight on one end and chamfered on the other.
The problem with current machines that is not possible to perform both types of cuts without changing machines or cutting heads with one type of saw or another.
The objective of the present invention is the development of a new type of fabric cutting machine, which allows both the straight cuts of the fabric and cuts in chamfer form interchangeably, without the need to change the cutting head or the machine.
In addition, a secondary objective of the present invention is to provide a cutting machine which allows the incorporation of several spools to avoid the need for an operator waiting to replace them every time they are depleted, leading to much faster production and which can be carried out with fewer number of staff.
On the other hand, and as a reference to the current state of the technique, it should be noted that, at least on the part of the applicant knowledge, the existence of any other machine of similar application, which has technical, structural and constitutive characteristics equal or similar to those claimed herein, is unknown.

EXPLANATION OF THE INVENTION

The machine for cutting fabric with a straight or chamfer cuts interchangeably proposed by the invention is configured as an optimal solution to the aforementioned objectives, being the characterizing details making it possible and that distinguish it conveniently included in the final claims that accompany the present description.
Specifically, what the invention proposes, as previously mentioned, is a machine for cutting fabric pieces, normally rolled in spools, according to a specific length. It is characterized essentially by comprising a lower support with a tensioning head and an upper cutting bridge that may feature either one or two saws for cutting the fabric, once it is positioned and tensioned between the lower support and the upper cutting bridge, either with a straight cut or with one or two chamfer cuts.
Thus, in a first possibility of implementation, the machine comprises, in the upper cutting bridge, a single sliding saw with tilting movement, so that it can be vertically positioned to straighten the cut of the fabric or it can be positioned in an inclined way to make the cut of the fabric in chamfer form. In this case, the fabric tensioned by the bottom support is arranged flat in both scenarios,and it is not necessary for it to be inclined, as simply by moving the inclination of the saw achieves either the straight or inclined cut.
In a second possibility of implementation, the machine comprises, in the upper cutting bridge, a single vertical saw that is horizontally displaceable, meaning that it does not tilt and is only vertically positioned, allowing it to move order to place it over a flat or inclined area of the fabric to be cut, which is tensioned such that it remains flat, i.e., perpendicular to the saw, in one area and inclined, at least partially, and the single saw (without tilting it, only with horizontally displacing it) cuts the fabric through the sloping area, which achieves the cut in chamfer form. The saw can cut straight if the support also places the fabric flat-wise.
In a third possibility of implementation, the machine comprises, on the upper cutting bridge, two saws: one that is always vertically positioned, and another that is always positioned in an inclined position, allowing to use either one to cut the fabric tensioned by the lower support, which is always arranged flat-wise.
And, in a fourth and last possibility of execution, the machine comprises, in the upper cutting bridge, two types of fixed saw: a single saw, meaning with a single blade, and one double saw, with two parallel blades, configured and arranged in such a way as to allow cutting the fabric both straight and in chamfer form. This means that either the blade of the single saw makes a cut perpendicular to the laminar surface of the fabric, resulting in a straight cut, or the two blades of the double saw making the cut, making a cut at a certain oblique angle to the laminar surface of the fabric.
In order to carry this out, in this case, the lower support head is designed to position the flat or inclined fabric, so it has a quadrangular tube configuration, along with rollers provided in the lower part of the upper bridge, such that when they are activated in order to place them in a working position, preferably by means of a pneumatic actuator, they position and tighten the area of the fabric to be cut, giving it an inverted V shape so that hasa flat central portion and two inclined portions on both sides of the central portion, in front and behind it, so that, depending on the saw selected from the two types of saw provided at the ends of the cutting bridge, either the single saw or the double saw, the straight or chamfer cut can be carried out.
Thus, if the single saw is operated to perform the straight cut, it is carried out by the central part of the fabric tensioned on the head, in the portion where it is tensioned in a flat position, since the single saw will pass through the center inserted through a slot provided in the central area of the head.
And, if the double saw is operated to make the cut in chamfer form, the two blades of the said double saw make the cut on the respective sides of the fabric positioned on the head where it is inclined.
In addition, it is important to note that, by means of the tensioning rollers at the bottom of the bridge, whose position can be modified to separate or join them together, the machine allows the increase or reduction of the tilting angle of the V-shaped fabric on the support head; thus, the inclination of the chamfer cut made by the double saw can be adjusted so that it is more or less wide and/or pointed, depending on the needs of each case.
In addition, in the preferred mode of implementation, the machine also includes means to remove the scrap resulting from the described double chamfer cut, means that preferably comprise a tipping system that rotates the support with the tensioning head to remove the fabric scrap.
Moreover, and regardless of the type of saw or saws that the machine has, it preferably includes a fabric feeder, with at least one spool of fabric to be cut and a moving and forward station with at least one motorized belt cradle.
More specifically, preferably, the feeder comprises a wheel which, as a rotating storage, allows the loading of different fabric spools in the machine, and permits the selection of one in each case to unwind it automatically on the motorized belt cradle of the sliding and forward station, which takes it to the cutting area of the machine, all without the need of an operator.
Thus, in the option where the cutting bridge includes two types of saws, one single and one double saw, the machine basically functions as follows:
First, it unrolls the fabric that the wheel has placed on the belt cradle according to the length pre-selected by the operator in a control panel intended for this purpose, rolling it in a collection spool located behind the cutting module.
Once the lenght is reached, the operator chooses the type of cut to be made, either a straight cut or a chamfer cut, and the machine performs the tensioning of the fabric in the cutting area, between the cutting bridge and the support with the tensioning head, and then the corresponding saw makes the cut.
If the chamfer cut has been chosen, after the cut, the support is turned with the head and the cut fabric scrap resulting from the chamfer cut is automatically released into a designated receptacle intended for this purpose.
In addition, preferably, the tipping system itself that releases the scrap of the chamfer cut, simultaneously allows the joining of the fabric layer from the wheel spool with the layer of the roll under construction, i.e. the one being cut.
Thus, the unwinding of a new piece is continued and, upon reaching the pre-selected lenght, the cut is again executed for example the straight cut in this case, where the cutting bridge moves downward by tensing the fabric over the lower support head and the single saw blade is inserted inside the quadrangular tube of that head, proceeding with the straight cut.
The machine provides multiple advantages:

Allows you to choose the spool that you want in the wheel and automatically unwind it on top of the belt cradle without the need for operators.
Allows you to have in the same machine that performs two types of cuts:
straight or chamfer, avoiding the need to buy of two different machines. In addition, this provides speed of manufacture and the optimization of space and time in the factory.
The chamfer cutting can be performed at the angle necessary for each need, to deploy perfectly overlapped pieces of fiberglass in a wind blade.
The head turner carries out the automatic release of the fabric scrap.

DESCRIPTION OF THE DRAWINGS

In order to supplement the description and to help with the better understanding of the invention's characteristics, a sheet of drawings is attached to this specification, as an integral part thereof, in which the following has been represented by way of illustration and not in a limiting manner:

Figure 1. Shows a laterally elevated view of a schematic representation, an example of the implementation of the machine for interchangeably cutting fabric with a straight or chamfer cut, which is the object of the invention, highlighting its general configuration and main parts;
Figure 2. Shows a laterally elevated view of the machine of the the invention similar to the previous one, in this case depicted with the wheel of spools located in contact with the motorized belt cradle;
Figure 3. Shows an extended schematic laterally elevated view of the cutting module comprising the machine of the invention, showing in more detail the support comprised of the head and the cutting bridge to position and cut the fabric;
Figure 4. Shows a schematic frontally elevated view of the cutting module, specifically in an example demonstrating two types of saw, single and double, showing their layout on both sides of the cutting bridge;
Figures 5-A, 5-B, 5-C, 5-D and 5-E. Show, in respective schematic laterally elevated views, an example of the cutting module shown in Figure 4 in different phases of the machine's operation to perform chamfer cutting with the double saw and releasing the fabric scrap;
Figure 6. Shows a view similar to Figure 5-D, where the cutting module with the single saw is shown to carry out the straight cut;
Figures 7-A and 7-B. Show schematic views of the support head in in its configuration with single and double saws, represented in this case with the fabric to be cut incorporated and tensioned by the pressing rollers in an inverted V shape. The figure depict the configuration respectively with the single saw for straight cutting and with the double saw for chamfer cutting;
Figures 8-A, 8-B, 8-C and 8-D. Show respective schematic representations of the different types of cuts that can be made on the fabric pieces using the machine related to the invention
Figures 9-A, 9-B, 9-C and 9-D. Show, in respective schematic representations of the cutting bridge and the lower support of the cutting module, the four workmanship options the machine comprises, i.e. with a single tilting saw Fig. 9-A, with a single straight saw that is horizontally sliding Fig. 9-B, with two single saws, one straight and one inclined Fig. 9-C, and with two types of saw, one single and one double Fig. 9-C.

PREFERENTIAL IMPLEMENTATION OF THE INVENTION

In view of the aforementioned figures, and according to the adopted numbering, a non-limiting example of the implementation of the machine for cutting fabric with either a straight or chamfer cut of the invention can be seen , comprising what is described in detail below.
Thus, as observed in these figures, the machine (1) related to the invention, is one that basically comprises a cutting module (4) with an upper cutting bridge (4.1) and a lower support (4.2) to position the fabric (t) to be cut.
And from this already known configuration, the machine (1), that is the object of the present invention, is essentially distinguished by comprising, in the cutting module (4), an upper cutting bridge (4.1) with at least one saw for cutting the fabric (t), once arranged and tensioned between the lower support (4.2) and the upper cutting bridge (4.1), either with a straight cut (r) or a chamfer cut (c).
For this purpose, in the first implementation option, represented schematically in Figure 9-A, the machine (1) comprises, in the upper cutting bridge (4.1), a single movable saw (4.10), for example, with a tilting motion, such that it can be vertically positioned to make the cut straight (r) or it can be positioned in an inclined way to make the chamfer cut (c), in both cases on the fabric (t) positioned flat-wise in the lower support (4.2). To do so according to preference, the machine (1) includes means to regulate the angle of the tilt of the moving saw (4.10) and thereby modifying the inclination of the chamfer cut (c).
In a second implementation option (Figure 9-B), the machine (1) comprises, in the upper cutting bridge (4.1), a single saw (4.11) vertically positioned. This option includes means to horizontally adjust the position of the saw perpendicularly to the longitudinal axis of the stringer (4.14) on which it slides to perform the cut, then, cutting the fabric (t) in the area where it is placed flat-wise, that is, perpendicular to the saw to carry out the straight cut (r), or by the area in which it is inclined, at least in part, and execute the chamfer cut (c).
In a third implementation option (Fig. 9-C), the machine (1) comprises, in the upper cutting bridge (4.1), two single saws that are selectable interchangeably, of which one is a vertical single saw (4.11) and the other a single inclined saw (4.11'), allowing the use of either one to cut the fabric tensioned by the lower support (4.2) and that is always arranged flat-wise. Preferably, the single inclined saw (4.11') also has means for regulating the saw's angle of inclination, which modifies the inclination of the chamfer cut (c).
And, in a fourth implementation option, shown in Figure 9-10 and Figures 7-A and 7-B, the machine comprises, in the upper cutting bridge (4.1), two types of vertical saw: a single saw (4.11) and a double saw (4.12). These can be selected interchangeably for cutting the fabric (t), once arranged and tensioned between the lower support (4.2) and the upper cutting bridge (4.1), achieving a straight cut (r) when the single saw (4.11) is selected or with a chamfer cut (c) when the double saw is selected (4.12).
Preferably, as shown in Figure 4, the two types of saw, the single saw (4.11) for straight cutting and the double saw (4.12) chamfer cutting, are incorporated in the resting position, at the respective ends of a crossbeam(4.14) of that cutting bridge (4.1) such that, when choosing one or the other, they slide along this crossbeam (4.14) from one end to the other to cut the width of the fabric arranged on it. In the case of the option with two single saws, one vertical (4.11) and one inclined (4.11'), these are also arranged at the respective ends of the transverse beam (4.14) in order to choose the use of one or the other.
In any case, preferably, the lower support (4.2) comprises a tensioning head (4.21) with a quadrangular tube-shaped configuration. At the lower part of the cutting bridge (4.1), the presence of pressing rollers (4.13) is provided so that, in the working position, these pressing rollers (4.13) tighten the area of the fabric (t) to be cut on the tensioning head (4.21), giving it an inverted V shape, as shown in Figure 3, shown in Figure 3 and, more specifically, in Figures 5-D and 6, as well as in Figures 7-A and 7-B, the fabric to be cut has a central flat portion (t1), coinciding with the vertex of the aforementioned V shape, and two inclined portions (t2) on both sides of the central portion, in front of and behind the tensioning head (4.21). The vertical single saw (4.11) cuts the fabric with a straight cut in the central flat portion (t1) of the fabric (Figure 6 or Figure 7-A), while the double saw (4.12) cuts the fabric in a chamfer along the respective inclined portions (t2) of the fabric, generating a scrap (tm) of excess fabric between the two chamfer cuts.
In addition, this configuration of the tensioning head (4.21) of the lower support also allows the chamfer cut (c) with the option of a single single vertical saw (4.11), in which case it moves horizontally to place it in the flat area or in the inclined area of the fabric.
In any case, according to preference, the assembly of the cutting bridge (4.1) presents a vertical movement, through a pneumatic actuator (8), in order to raise and make it descend on the lower support (4.2) where the fabric (t) to be cut is tensioned.
And preferably, the pressing rollers (4.13) are laterally mobile, for example through guides, so that they can be separated or brought closer together and toward the tensioning head (4.21), thus allowing the extension or reduction of the angle of inclination of the inclined portions (t2) of fabric to be cut in chamfer form, in such a way that they act as means of the machine to regulate the inclination of the chamfer cut (c).
Therefore, preferably the machine (1) comprises, in order to modify the inclination of the chamfer cut (c), at least in the implementation options with a single saw (4.11)that is horizontally sliding or with two types of saws (4.11, 4.12), with means allowing to modify the inclined positioning geometry of the fabric (t) in the tensioning head (4.21) of the lower support (4.2), preferably in the form of the aforementioned rollers (4.13).
In addition, preferably, the lower support (4.2) with the tensioning head (4.21) forms a vertically movable assembly, allowing it to be raised and lowered to tighten the fabric (t) under the upper cutting bridge (4.1). The head (4.21) is associated with a rotating mechanism (4.22) on its longitudinal axis, enabling it to turn and acting as a means to release the excess fabric (tm) from the cut. This excess falls onto a lower receiving belt (7), which leads to a collection receptacle intended for that purpose.
In any event, regardless of the type of saw that the machine includes in the cutting module (4), it also includes a fabric feeding unit (2) equipped with support to install at least one spool (b) of fabric (t) for cutting, and a motorized movement and forward station (3) for the fabric to be cut, with at least one motorized belt cradle (3.1).
Preferably, in the fabric feeder unit (2), the machine (1) comprises a wheel (2.1) which, installed on a bearing structure (2.2), that allows the loading of several and different fabric (t) spools (b), preferably four, enabling the selection of the appropriate one as needed.
Preferably, the bearing structure (2.2) of the spool (b) wheels (2.1) is provided with means of horizontal sliding in order to automatically position one of the spools (b) on the motorized belt cradle (3.1) of the motorized sliding and forward station (3) for the fabric to be cut, which, in cooperation with a pusher roller (3.2), seeks the unwinding of the roller toward the cutting module (4), as shown in Figures 1 and 2, preventing this operation from being performed by an operator.
Preferably, the wheel (2.1) and the motorized belt cradle (3.1) of the sliding and forward station (3) that receives the spool (b) to be used, operate with a programmable electric motor and encoder via a control panel (6).
In turn, the machine (1) also comprises a collection station (5) for the cut fabric, with at least one collection roller (5.1), and means of electronic control (6) which, through a processor with a user interface, for example via keyboard and/or touchscreen (6.1), allow the regulation and management of the automatic operation of the different actuators of each station and module of the machine (1).
On the other hand, preferably the moving elements of the cutting bridge (4.1) and the support (4.2) of the cutting module (4), including the turning mechanism, operate via pneumatic actuators as well as controllable and programmable electronics to select the single (4.11) or double saw (4.12) through the control panel (6).
Thus, as shown in Figures 5-A to 5-E, the operation of the cutting module (4), particularly in the option where there are two types of saw, a single (4.11) and a double (4.12), is as follows:

In a first phase (Fig. 5-A), after the unwinding of the fabric (t) from the spool (b) that the wheel (2.1) has placed on the motorized belt cradle (3.1) and its winding on the collection roller (5.1) according to the measure pre-selected by the operator on the control panel (6), the portion of fabric (t) to be cut is placed in an extended position in the cutting module (4) attached to the lower support (4.2), which is with the tensioning head (4.21) facing downward.
Next (Fig. 5-B), the lower support assembly (4.2) with the tensioning head (4.21) descends to a lower position and, next, the rotating mechanism (4.22) flips the head (4.21) to face upward, just below the fabric (t) to be cut (Fig. 5-C).
After the aforementioned turn, the cutting bridge (4.1), driven by the pneumatic actuator (8), descends so that the pressing rollers (4.13) of the bottom press the fabric (t) on the tensioning head (4.21), so that the fabric (t) takes on the inverted V shape (Fig. 5-D), after which the selected saw is activated, in this case the double saw (4.12) that cuts the fabric in chamfer form by the two inclined portions (t2).
As a consequence of this double cut in chamfer form, a scrap (tm) is generated in the fabric, which falls on the lower receiving belt (7) when the rotating mechanism (4.22) of the head (4.21) is again oriented downward (Fig. 5-E), allowing the sequence to start again, either with the same double saw (4.12) to make a chamfer cut again or with the single saw (4.11) to make a straight cut, as shown in Figure 6.

Finally, Figures 8-A to 8-D show the different cutting options with which the pieces of fabric can be cut (t): With both ends in a straight cut (r) (Fig. 8-A), with a first end in a straight cut (r) and a second end in a chamfer cut (c) (Fig. 8-B), with a first end in a chamfer cut (c) and a second end in a straight cut (r) (Fig. 8-C) or with both ends in a chamfer cut (c) (Fig. 8-D).
Having sufficiently described the characteristics of the present invention, as well as the method of putting it into practice, it is not considered necessary to set forth a more extensive explanation so that any expert in the field understands its scope and the advantages derived from it.

Claims

A machine for interchangeably cutting fabric with a straight or chamfer cut that, comprising a cutting module (4) with an upper cutting bridge (4.1) and a lower support (4.2) to position the fabric (t) to be cut, is characterized as such by comprising, in the cutting module (4), an upper cutting bridge (4.1) with at least one saw for cutting the fabric (t) once arranged and tensioned between the lower support (4.2) and the upper cutting bridge (4.1), either with a straight cut (r) or with a chamfer cut (c).
A machine for interchangeably cutting fabric with a straight or chamfer cut, according to Claim 1, characterized as such due to the upper cutting bridge (4.1), comprising a single movable saw (4.10) with tilting movement, which can be vertically positioned to make the straight cut (r) or inclined to make the chamfer cut (c), in both cases on the fabric (t) positioned flat in the lower support (4.2).
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 1, characterized as such due to the upper cutting bridge (4.1) comprising a single vertical saw (4.11) with horizontal movement, and cutting the fabric (t) by an area where it is placed flat to make the straight cut (r), or by an area where it is inclined, at least in part, and making the chamfer cut (c).
A machine for interchangeably cutting fabric with straight or chamfer cut according to Claim 1, characterized as such due to the upper cutting bridge (4.1), comprising two single saws that are interchangeably selectional, a single vertical saw (4.11) and an inclined single saw (4.11'), allowing the use of either oneto cut the fabric tensioned by the lower support (4.2) in a flat position.
A machine for interchangeably cutting fabric with a straight or in chamfer cut according to Claim 1, characterized as such due to the upper cutting bridge (4.1) comprised two types of vertical saw, a single saw (4.11) and a double saw (4.12), which are interchangeably selectable to cut the fabric (t), once arranged and tensioned between the lower support (4.2) and the upper cutting bridge (4.1), with a straight cut (r) when the single saw is selected (4.11), or with a chamfer cut (c) when the double saw is selected (4.12).
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 1, characterized as such in that it includes means to modify the inclination of the chamfer cut (c).
A machine for interchangeably cutting fabric with straight or chamfer cut according to Claim 2 and 6, characterized as such because, to modify the inclination of the chamfer cut (c), it comprises means to regulate the angle of the inclination of the tilting movable saw (4.10).
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 3 and 6, characterized as such because, to modify the inclination of the chamfer cut (c), it comprises means to regulate the angle of inclination of the inclined saw (4.11').
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 4, 5 and 6, characterized as such, because to modify the inclination of the chamfer cut (c) it comprises rollers (4.13) that allow the modification of the inclined positioning geometry of the fabric (t) in a tensioning head (4.21) of the lower support (4.2).
A machine for interchangeably cutting fabric with a straight or chamfer cut according to any of the above claims, characterized as such because the lower support (4.2) comprises a configuration tensioning head (4.21) in the shape of a quadrangular tube, and, in the lower part of the cutting bridge (4.1), pressing rollers (4.13) are envisaged so that in a working position, the rollers tension the area of the fabric (t) to be cut over the tensioning head (4.21), giving it an inverted V shape with a flat central portion (t1) with a straight cut (r) and two inclined portions (t2) on both sides of the central portion, to make a chamfer cut (c).
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 10, characterized as such because the pressing rollers (4.13) are mobile, allowing the expansion or reduction of the angle of inclination of the inclined portions (t2) of the fabric for the chamfer cut.
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 10 or 11, comprising means to release fabric scrap (tm) from the cut.
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 12, characterized as such because the head (4.21) is associated with a rotating mechanism (4.22) on its longitudinal axis that allows turning it over, to release the fabric scrap (tm) of the chamfer cut.
A machine for interchangeably cutting fabric with a straight or chamfer cut according to any of the above claims, characterized as such because it comprises a fabric feeder (2) with a wheel (2.1) which, installed on a support structure (2.2), allows the loading of several different fabric (t) spools (b) and selecting the appropriate one for use..
A machine for interchangeably cutting fabric with a straight or chamfer cut according to Claim 14, characterized as such because the structure (2.2) of the bearing wheel (2.1) is equipped with means of horizontal sliding in order to automatically position one of the spools (b) on the motorized belt cradle (3.1) of the motorized sliding and forward station (3) of the fabric to be cut, which in cooperation with a pusher roller (3.2) seeks its unwinding toward the cutting module (4).