DE102021103849A1 - Slicing machine and operating method therefor for improving the pulling cut - Google Patents

Abstract

In order not to let the pull factor (Z) of the pulling cut drop too much during the oscillating up and down movement of the knife carrier (6) with the knife (3), especially in the central area of the path (W), the Drive train for the rotation of the knife (3) designed in such a way that when the knife (3) dips into the product line (100), the knife speed caused by the knife motor (5) causes an additional partial rotation of the knife (3) is superimposed in its cutting direction of rotation.

Description

I. Field of application

The invention relates to slicing machines for slicing partially elastic, elongate product pieces from a foodstuff, such as pieces of meat.

II. Technical background

The slices are cut off one after the other from the front end of the product piece by means of a rotating, plate-shaped knife, the outer peripheral edge of which is designed as a sharply ground cutting edge, at least over a certain segment area, or the knife as a whole is a circular disk-shaped knife with a cutting edge on the circumference is.

For cutting, the rotating knife usually plunges into the product piece from above until it has completely severed its cross-section and then moves back to the upper starting position. The knife is usually mounted rotating in a knife carrier, and this is guided laterally in linear knife guides for the oscillating back and forth movement, mostly up and down movement, and often moved back and forth by means of a crank.

The quality of the cut made by such a rotating knife in the material to be cut is all the better, and the slices that have been cut off are therefore all the cleaner in appearance, the more the cut is a so-called pulling cut. The pull ratio Z is the peripheral speed t of the cutting edge in the tangential direction in relation to the radial plunge speed e in the plunge direction, i.e. Z = t / e, with a value of Z over 15 being aimed for if possible. The knife usually has a diameter of 30 cm to 80 cm and a speed of 50 rpm to 400 rpm.

However, since the knife carrier is moved back and forth in an oscillating manner, its plunge speed e increases from the reversal point, reaches the highest speed in the plunge direction in the middle area of its movement path - which can also remain constant over a certain period of time in the middle area - and then drops again down to zero.

Because of Z = t / e, Z is very high near the reversal point because of a low s value, and on the other hand decreases in the middle range.

In principle, the same problem also exists when the knife is not moved linearly back and forth, but is pivoted back and forth attached to the arm of a rocker.

The fact that with such slicing machines the initially irregularly shaped product piece is usually pressed in a shaped tube with a cross-section that remains constant over the length to a product caliber with a cross-section that remains constant over the length and is fed to the cutting unit from this shaped tube in this problem as little as the fact that two or more product pieces fed in next to each other or, in particular, pressed product calibers, are often cut open by means of just one knife.

III. Presentation of the invention

a) Technical task

It is therefore the object of the invention to design the slicing machine in such a way that the Z-ratio of the pulling cut, which is lower in the central area of the knife's immersion path, is maintained, and a method for achieving this in a generic slicing machine .

b) Solution of the task

This object is solved by the features of claims 1 and 14. Advantageous embodiments emerge from the dependent claims.

A generic slicing machine, with which product pieces such as pieces of meat are to be sliced, comprises a cutting unit with a knife and a product support for placing the product piece to be sliced, which is usually designed as a feed unit in order to piece to the cutting unit, i.e. after cutting off each slice again to move the thickness of the cut off slice forward in the direction of the cutting unit.

The cutting unit usually includes a blade rotating about a blade axis, the outer circumference of which is designed as a sharply ground cutting edge at least over a partial area, and a blade carrier in which the blade is mounted in a rotating manner.

Especially if the cutting edge - seen in the direction of the blade axis - is designed in the shape of a segment of a circle or circular, the blade carrier is moved back and forth along at least one guide, usually two guides spaced apart from one another and preferably running linearly, between two end positions.

In the one end position, the initial position, the blade and its cutting edge are so far away from the product support at a distance that is greater than the height of a product piece to be sliced, measured in this direction. In the other end position, the end position, the blade, viewed in the direction of the blade axis, completely covers the cross section of a product lying on the product support, for which purpose the blade extends to the side of the product support facing away from the blade axis.

Since the product support usually runs horizontally or upwards at an angle away from the cutting unit, the starting position of the knife carrier and thus of the knife is higher than the end position.

Since the knife carrier must first be braked in each of the two end positions, brought to a standstill and then accelerated in the opposite direction, an attempt is made to reduce the weight of the components to be moved back and forth - i.e. the knife carrier, the knife stored in it and the others on the knife carrier attached components - to be kept as low as possible.

For this reason, the blade motor for driving the blade in rotation is not arranged directly on the blade carrier, for example on the blade axis, but rather away from the blade axis, usually with the motor output shaft being aligned either transversely, preferably vertically, or parallel to the blade axis.

Therefore, a drive train that effectively connects the blade motor and the blade is necessary, which is non-rotatably connected on the one hand to the motor output shaft and on the other hand to the blade.

If the drive train includes a drive shaft, a drive deflection between the direction of the drive shaft and the direction of the axis of rotation of the blade is usually necessary on the blade side.

If the blade motor is arranged pivotably on the base frame so that the drive shaft can perform the necessary pivoting movement when moving the blade carrier back and forth, the length of the drive shaft only has to be variable, for example as a telescoping sliding shaft.

If the blade motor is not only stationary, but fixed to the base frame, i.e. not pivotable, a motor-side drive deflection is also required, which is closer to the motor than the blade-side drive deflection, so that the drive shaft can carry out the necessary pivoting movement when moving of the knife carrier can carry out.

In this way, the knife motor can be positioned in a fixed position in the base frame of the machine and its weight does not have to be accelerated when the knife carrier is moved back and forth, but only the significantly lower weight of the drive shaft in between.

However, the drive train can also be designed in a different way, for example as a belt drive.

When the knife rotates continuously and at a constant speed, there is a virtually infinitely high draw ratio in the end positions of the knife carrier, which would drop in the area between the end positions with a knife carrier moving in the immersion direction without further measures.

In order to avoid this at least partially, the existing drive train is designed and arranged according to the invention in such a way that when the knife moves in the direction of immersion, the resulting pivoting of the drive train around a pivot point on the motor side, even when the knife motor is at a standstill, causes a pivoting, i.e. a partial rotation, of the Knife would cause in its cutting direction of rotation, ie in the direction of rotation in which the knife for cutting off a slice is driven to rotate during operation.

When the knife carrier moves back from the end position to the starting position, this causes a partial rotation of the knife against the cutting direction of rotation, but this is harmless.

If the drive train comprises a drive shaft and at least one of its ends a drive redirection, this drive redirection, or if there are two drive redirection devices, preferably not just one, but both, is designed and arranged in such a way that the above objective is achieved.

If, during operation, the knife is driven rotating, usually at a constant speed, in the cutting direction of rotation, an additional partial rotation is added to the rotary drive by the knife motor in the immersion direction, i.e. from the starting position towards the end position by pivoting the drive train, as a result of which the draft ratio when the knife is immersed can be kept higher than without such a design of the drive train for the rotating drive of the knife.

If you keep in mind that with a rotating knife that is only shaped like a segment of a circle, the cutting process does not even take place during a complete revolution of the knife, and this is usually also the case with a knife that is continuously round, i.e. circular disk-shaped, it becomes conceivable that a such additional partial rotation has a significant effect on the pull ratio Z of the pulling cut.

As a rule, the direction of travel of the drive shaft is parallel to the plane of the blade, which is defined by the cutting edge, and then the drive deflection on the blade side is 90°, while the drive deflection on the motor side is much less, usually only a maximum of +/- 30° , usually only a maximum of +/- 20° with respect to the central position of the pivoting drive shaft. Such a drive deflection can in particular be designed as a gear and additionally bring about a reduction or translation of the engine speed.

In order to achieve the stated goal, the drive deflection on the blade side can be designed as a gear transmission, in particular as a bevel gear transmission or a worm gear transmission.

In a bevel gear this usually includes two meshing bevel gears, one of which is aligned coaxially to the blade axis and the other coaxially to the drive shaft. By shifting the blade-side bevel gear in the immersion direction, it is forcibly rotated further by an angular amount by the bevel gear of the drive shaft, which is in engagement with it and does not rotate, and thus causes a partial rotation of the blade.

This effect also occurs analogously in a worm gear mechanism with one or preferably two meshing worm gear wheels.

In order for this additional partial rotation to occur during the plunge movement in the cutting direction of rotation and not against it, the shaft-side bevel gear must be arranged on one of the two available sides with respect to the blade axis, and also on the correct side of the plane of rotation of the cone degree arranged coaxially on the blade axis, i.e. on its side pointing towards the blade or facing away from it.

A similar effect would be achievable with the drive deflection on the motor side if it were also designed as a bevel gear transmission, but this would hardly be of any importance because of the much smaller pivoting path only in accordance with the diameter of the bevel gear on the motor side.

On the motor side, as mentioned, the direction of the motor output shaft is initially chosen to be approximately parallel to the blade plane, at most at an acute angle thereto, and instead of a pair of gears, a pivotable connection is provided between the motor output shaft and the drive shaft, such as a universal joint.

A simple universal joint, i.e. cardan joint, causes a non-uniform angular speed on its output side within one revolution of the cardan joint, despite a uniform angular speed on its drive side.

A so-called homokinetic cardan joint, also known as a constant velocity joint, is therefore preferably used, in which such a change in the angular speed does not occur within one revolution.

As a result, the drive deflection on the motor side does not cause an additional partial rotation of the knife during the plunge movement of the knife carrier, as is the case with the drive deflection on the knife side, but oscillations in the speed of the knife are avoided, which has a negative impact both on the cutting result and in the In terms of the load on the knife bearing and the entire slicing machine would be disadvantageous.

• Wenn beispielsweise ein Riementrieb verwendet wird, bei dem der Riemen, meist ein Zahnriemen, in einer Ebene parallel zur Messerebene umläuft und die Rotationsachse des Motor-seitigen Ritzels vorzugsweise parallel zur Messerachse verläuft, tritt der gewünschte Effekt am Motor-seitigen Ritzel auf:

The desired effect can also be achieved with other types of drive train:

• If, for example, a belt drive is used in which the belt, usually a toothed belt, runs in a plane parallel to the plane of the blade and the axis of rotation of the pinion on the motor side preferably runs parallel to the axis of the blade, the desired effect occurs on the pinion on the motor side:

When the motor-side sprocket is not rotating, the tangential movement of the blade-side sprocket causes one strand of the belt to be wound further onto the motor-side sprocket and the other strand to be further unwound from the motor-side sprocket. This causes the blade-side gear to rotate solely due to the movement of the axis of rotation of the blade-side gear relative to the motor-side gear.

By appropriate arrangement of such a drive train, so on which side of the Knife plane and on which side of the longitudinal center plane through the slicing machine, an additional rotation of the knife-side pinion in the cutting direction can be achieved, which adds up well to the rotation caused by the rotation of the knife motor when the knife dips into the cutting edge.

In order to achieve a simple construction with a long service life for the carrier drive, it is preferably designed as a crank drive.

Since with a revolving crank the stroke can only be changed during the back and forth movement of the knife carrier - which is preferably desired with product pieces of different heights, so that the upper end position is just above the upper end of the product piece - this is only possible if the point of application of the connecting rod between the crank arm and the blade holder on the crank arm can be adjusted in the radial direction.

In order to avoid such a complex construction, the crank drive is preferably designed as an oscillatingly driven pivoting crank drive, in which the crank is only pivoted back and forth by a specific pivoting angle by means of a carrier usually seated directly on the pivoting axis of the crank. Motor, the swivel angle of which can be selected by means of the control system, making it very easy to adjust the stroke of the knife carrier.

In order to achieve a stable drive, a crank drive acts on the knife carrier, preferably on both sides of the knife axis, whereby the two crank drives must of course be driven synchronously and for this purpose are driven in particular by a common carrier motor.

Preferably, the knife motor and the carrier motor - viewed from above on the machine - are arranged on the same side, the drive side A, with respect to the throughput direction, so that the other, opposite, operator side B is free of drive motors and drive strands, and from this operator side B the operator can see the cutting processes and the machine as a whole is easily accessible, especially for cleaning work.

A slicing machine often also has a stop, usually designed as a stop plate, against which the product piece is pushed forward until it rests before the next slice is cut, so that the thickness of the slice to be cut depends on the distance between the contact surface of the stop and the knife plane depends.

In known designs of the slicing machine, such a stop is attached to the knife carrier and the distance to the knife axis can be adjusted, mostly manually, but usually cannot be changed during the severing process of a slice.

In order to achieve this - whereby a clean tipping of the separated pane and depositing on a discharge conveyor can be optimized - according to the invention the stop is moved back and forth separately, i.e. by means of its own stop drive, as well as the knife carrier and the knife, preferably also in a stop plane that is parallel to the knife plane, but not synchronous to the knife and the knife carrier.

For this purpose, the stop drive is of the same design as the carrier drive, and in particular when the carrier drive is designed as a crank drive, the stop drive is also designed as a crank drive. If the carrier drive is designed as an oscillating pivoting crank drive, this preferably also applies to the stop drive.

In this way, due to the same functional principles, partially identical components can be used, and the service lives of the components are also approximately the same and can be replaced at the same change interval.

If there is only one stop, a crank drive engages on both sides of the blade axis, which - preferably as with the carrier drive - must be driven synchronously and are driven in particular by a common stop motor, which is preferably also located on the drive side.

Frequently, however, slicing machines are designed as multi-lane slicing machines in which two or even more product pieces are arranged next to one another, preferably viewed from above, and with each immersion movement of only one knife, this knife is removed from each product at the same time. separate a slice from each piece.

In this case, there is preferably a separate stop on each track, i.e. for each product piece, and also a separate stop drive for each stop, in order to separate the relative movement between the stop and knife during a dipping process for each track to be able to control by means of the stop drive.

In this case, in a multi-lane slicing machine, a drive usually only acts on one of the two ends of the blade axis, in particular a crank drive, in order to keep the design from becoming too complex, especially since the surface of the stop is relative is low and also the friction forces introduced via it.

In a two-lane slicing machine, the drive, in particular the crank drive, acts on the two stops at the end of the stop facing away from the blade axis.

Irrespective of this, as far as possible all stop motors should be arranged on the drive side of the slicing machine, even in the case of a multi-lane slicing machine.

With regard to the method for operating the slicing machine with the purpose of improving the pulling cut in the middle area of the knife carrier moving back and forth between its end positions, in particular in a slicing machine of the generic type as described above, the existing object is achieved in that that the pulling cut, i.e. the draft ratio, is improved by means of the drive train of the rotary drive of the knife in the central area of its immersion path through the displacement of the knife in the direction of immersion, which is preferably effected by means of the drive deflection between the knife motor and the knife on the knife side becomes.

In this way, the cutting result can be optimized.

The rotating knife is moved back and forth, preferably linearly, between two end positions, and in particular in the case of a multi-track machine per track, one stop is also moved back and forth, preferably also linearly, and this is done for knife and stop in particular by means of the same drive principle, preferably a crank drive causes.

As a result, identical parts can be used and the manufacturing costs can be reduced. In the case of an oscillating crank drive, the lifting height can be easily changed from the control by changing the pivoting angle of the carrier motor and/or the stop motor.

Preferably, the drives of the cutting unit, in particular all drives of the cutting unit, in particular all drives of the slicing machine, are arranged on the same so-called drive side A with respect to the throughput direction, in order to obstruct access to the machine for the operator from the opposite operator side as little as possible .

character list

• 1a: eine Aufschneide-Maschine im vertikalen Längsschnitt durch den Formrohr-Hohlraum,
• 1b: ein Diagramm der Eintauch-Geschwindigkeit des Messers über die Wegstrecke W beim Eintauchen und beim Zurückziehen,
• 2: die Aufschneide-Maschine in der Darstellung gemäß 1a, mit einem zusätzlichen Anschlag-Antrieb,
• 3a: die Aufschneide-Maschine gemäß 2 in einer zweispurigen Version mit einer 1. Bauform eines Messer-Antriebsstranges, betrachtet in Vorschub-Richtung,
• 3b: in einer Detaildarstellung der Ansicht der 3a eine 2. Bauform eines Messer-Antriebsstranges,
• 3b1: eine Detail-Vergrößerung aus 3b,
• 4: die Aufschneide-Maschine 1 gemäß 3 in der Aufsicht von oben

Embodiments according to the invention are described in more detail below by way of example. Show it:

• 1a : a slicing machine in a vertical longitudinal section through the mold tube cavity,
• 1b : a diagram of the plunging speed of the knife over the distance W when plunging and when withdrawing,
• 2 : the slicing machine shown in the illustration 1a , with an additional stop drive,
• 3a : according to the slicing machine 2 in a two-lane version with a 1st design of a knife drive train, viewed in the feed direction,
• 3b : in a detail view of the 3a a 2nd design of a knife drive train,
• 3b1 : a detail enlargement 3b ,
• 4 : the slicing machine 1 according to 3 in top view

1a shows a principle representation of a slicing machine 1 that is known insofar as the product piece 100 not only rests on a support surface 16a in a feed unit 20, but is also pressed into a product strand with a cross-section that is uniform over its length in one Shaped tube 16 with a cross section of its shaped tube cavity 16' which is uniform over the length. For slicing, the product strand is pushed forward by a product pusher 17, in particular a longitudinal press ram 17, driven by a strand drive 19.

The cutting unit 30 comprises a plate-shaped knife 3 with a sharply ground cutting edge 3a on its circumference, which defines a knife plane 3" along which the knife 3 can move back and forth immediately in front of the front end, the cutting end, of the shaped tube 16 to cut off a Overhang of the product strand 100, which is pushed forward out of the forming tube 16 up to a stop 13, by means of the knife 3.

The knife 3 is in 1a shown with the lowest point of its cutting edge 3a in the starting position just above the front opening of the shaped tube 16 and can be lowered from there into the dashed position in which it completely covers the front opening of the mold tube cavity 16' and previously cut off a pane.

The knife 3' is mounted and driven in a knife carrier 6, rotating about its knife axis 3', which is perpendicular to the knife plane 3", and the knife carrier 6 can be moved up and down along a knife carrier guide 24 along the inclined, overhanging Front surface of the shaped tube 16 - driven by a distance W- by a carrier drive 8 in the form of a crank mechanism 4, which is driven by a blade carrier motor 25.

This blade carrier motor 25 pivots a crank arm 4a of the crank mechanism 4 in an oscillating manner back and forth about a pivot angle α, which is articulated via a connecting rod 4b - which is articulated on the one hand at the free end of the crank arm 4a and on the other hand on the blade carrier 6 in a transverse direction 11.2, the line of sight of 1a running is articulated - whereby the blade carrier 6 in the other transverse direction 11.1 perpendicular to the feed direction 10 of the product strand 100 moves up and down.

Since the knife carrier 6 and thus also the knife 3 must be braked, stopped and accelerated again in the upper and lower end position, its immersion speed e in the immersion direction 18 follows an approximately sinusoidal curve 1b , in that it is accelerated from each end position - starting at the upper end position downwards - to a maximum value and then decelerated again to zero at the lower end position, where it is again accelerated in the negative direction e to a maximum value and decelerated again the upper end position and brought to a standstill.

According to the horizontal dashed line, the immersion speed e can also be capped in the middle area between the two end positions, i.e. upper and lower end position, but this delays the cutting process, which is why this is usually not done.

The middle area in the first half-wave is problematic, i.e. when the knife plunges from top to bottom, since in this area the plunge speed e is relatively high and the pull factor Z = t/e is relatively small.

To counter this, according to 3a In the middle area of the immersion path W, the tangential speed t compared to the speed of the driving blade motor 5 is additionally increased by a specific 1st design of the drive train for the rotary drive of the blade, the blade motor 5 of which is fixed in the base frame away from the blade carrier 6 2 of the machine 1 and here in particular also outside the diameter of the plate-shaped knife 3 is positioned.

The drive train comprises a drive shaft 7, which runs approximately parallel to the blade plane 3", in any case not with its longitudinal extent aligned with the blade axis 3', so that a drive deflection 9a is necessary at the blade-side end of the drive shaft 7, and also at the motor-side end a motor-side drive Deflection 9b, because viewed in the direction of the blade axis 3', the drive shaft 7 changes its angular position to the transverse direction 11.2 within its movement path W, depending on the position of the blade carrier 6.

Since the output shaft of the blade motor 5 is in the transverse direction 11.2, which is perpendicular to the transverse direction 11.1, in which the immersion direction 18 of the blade 3 runs, a homokinetic cardan joint 22 is used for the motor-side drive deflection 9b, which rotates the Motor output shaft passes on to the drive shaft 7 at the same angle.

In 3a the typical design of such a homokinetic cardan joint 22 with a C-shaped fork 22b, which encompasses a ball 22a, and the balls 23 in between, which run in respective grooves, not shown here, can be seen.

The drive deflection 9a on the knife side is implemented as a bevel gear pairing, in that one bevel gear 21a sits coaxially on the knife axis 3' and the other bevel gear 21b sits coaxially on the end of the drive shaft 7 on the knife side.

If the blade carrier 6 is moved downwards from the position shown - regardless of the fact that the blade 3 has already passed through the cross-sections of the shaped tube cavities 100" in the position shown - the bevel gear wheel 21b on the drive shaft 7 also rotates if this would not rotate - the bevel gear wheel 21a would continue to rotate by one angular segment, corresponding to the downward movement of the blade carrier 6, and would thereby rotate the knife 3 further by one angular segment in the cutting direction of rotation 25.

For this purpose it is of course important on which side - that is to the left or right - of the immersion direction 18 running through the blade axis 3' in the viewing direction of the 3a , i.e. the longitudinal center plane 10" containing the knife axis 3', as also in 4 drawn in, the drive shaft 7 on the annular toothing of the blade-side bevel gear 21a shown here as a ring gear attacks and whether it runs and attacks in front of or behind this ring gear 21a in the direction of view.

This small further rotation by an angular segment may appear small at first glance, but increases the tangential speed t - as in 3a drawn in at the lowest point of the cutting edge 3a - not insignificant when one considers that the severing process, i.e. passing through the raw form cross-section 100", is completed in significantly less than one revolution of the blade 3.

This effect according to the invention is independent of whether such a rotary drive of the knife is used on a single-track slicing machine 1 or, as shown here, a two-track slicing machine 1 with two adjacent tracks Sp1, Sp2, and regardless of how the knife carrier drive 8 is implemented .

Only shows for the sake of completeness 2 such a two-lane slicing machine 1 viewed from above, with a general throughput direction 10* from right to left:

The product pieces 100 are conveyed side by side on two lanes Sp1, Sp2 by a feed conveyor 26 to the two shaping tubes 16 and introduced into them, pressed therein and pushed forward and sliced by the knife 3, which - combined into portions 110 - from be transported away by a discharge conveyor 27 .

• Hierfür umfasst der Antriebsstrang einen endlosen, in einer Ebene parallel zur Messerebene 3' umlaufenden Zahnriemen 29, der über zwei Umlenk-Ritzel 28a, b umläuft, von denen das Messerseitige Umlenk-Ritzel 28b koaxial zur Messerachse 3' angeordnet ist und drehfest mit dem Messer 3 gekoppelt ist.

3b shows in the same viewing direction as 3a , but only an enlarged detail in contrast, a 2nd design of a drive train between the knife 3 and the knife motor 5, with which the desired additional rotation of the knife 3 in the cutting direction 25 can also be achieved when the knife 3 is in the immersion Direction 18 moves:

• For this purpose, the drive train comprises an endless toothed belt 29 running in a plane parallel to the blade plane 3', which runs over two deflection pinions 28a, b, of which the blade-side deflection pinion 28b is arranged coaxially to the blade axis 3' and is non-rotatable with the blade 3 is coupled.

Analogously, the pinion 28a on the motor side is arranged coaxially with the output shaft of the blade motor 5 here.

However, neither is a condition for the realization of the additional rotation, but merely that the axis of rotation 28a' runs parallel to the blade axis 3'.

If the knife and thus the knife-side pinion 28b moves from the in 3b illustrated upper end position in a plunge direction 18 downwards, the distance between the two pinions 28a, b is reduced, which is immaterial for the invention, but makes it clear that the toothed belt 29 requires a belt tensioner that compensates for this.

In contrast, is essential to the invention - as in the enlargement of the 3b1 of the area around the pinion 28a on the motor side - that with such a movement of the blade the in 3b and 3b1 The upper run 29a of the toothed belt 29 is increasingly wound onto the pinion 28a, as shown, and the lower run 29b is unwound from it analogously, which is no longer shown for the sake of simplicity.

Based on the upper run 29a it can be seen that due to this increasing winding up, the upper run 29a is shortened by the distance δL in the direction of the other pinion 28b, while the lower run 29b is lengthened by the same distance analogously, whereby the knife-side pinion 28b in rotation is offset and causes the desired additional rotation in the cutting direction 25, which is added to the motor-side pinion 28a, which is additionally driven by the blade motor 5, of the rotation caused by the motor.

According to 3a each of the two tracks Sp1, Sp2 is equipped with its own stop plate 13, so that the stop plates 13 can be adjusted their radial distance 22a from the cutting edge 3a of the blade 3 independently of one another.

The knife carrier drive 8 is designed as a double crank mechanism 4, so that on both sides of the knife 3 a crank mechanism acts on the knife carrier 6, and both are swiveled back and forth by the same crank axle 4', which is swiveled back and forth by a knife carrier motor 25 becomes.

A crank arm 14a protrudes in the same direction at an axial distance from the crank axle 4', at the free end of which a connecting rod 14b is attached, which in turn pivotally engages the knife carrier 6 with its other end, provided that the two crank drives 4 are driven synchronously.

The two stop plates 13 are each driven by a crank drive 15, which can, however, be driven independently of one another by means of a stop motor 15.

Accordingly, the two crank axles 14' are identical and are specifically designed in the form of a hollow shaft on the one hand, on which one crank arm 14a acts and on the other hand a longer central shaft mounted in this, which is driven by the other stop motor 15, on which the other crank arm 14a attacks.

Each of the two crank arms 14a is in turn articulated via a connecting rod 14b to one of the stop plates 13, which can each be displaced along a stop guide 12 in the transverse direction 11.1, i.e. in the same direction as the knife carrier 6.

As 3a shows, it is possible in this way to arrange both the blade motor 5 and the stop motors 15 as well as the blade carrier motor 25 with respect to the blade axis 3' on the same side, the so-called drive side A the - how based on the supervision of the 4 imaginable - all drive motors for the conveyor belts, such as the feed conveyor 26 and the discharge conveyor 27, can also be arranged so that the opposite side as operator side B is very easily accessible for maintenance and cleaning work due to the lack of motors and drive trains there.

Reference List

1

slicing machine

1*

steering

2

base frame

3

knife

3a

cutting edge, cutting edge

3.1

flight circle

3'

Axis of rotation, knife plumb

3"

knife plane

4

crank drive

4a

crank arm

4b

connecting rod

5

knife engine

6

knife carrier

7

drive shaft

8th

Carrier Drive

9a

knife-side drive deflection

9b

motor-side drive deflection

10

axial direction, longitudinal direction, feed direction

10*

flow direction

10"

longitudinal median plane

11.1

first transverse direction

11.2

second transverse direction

12

Stop guide, plate guide

13

stop plate

13.1

stop surface

13a

Circumferential area, functional edge

14

crank drive

14a

crank arm

14b

connecting rod

15

Stroke Motor

16

strand guide, shaped tube

16a

bearing surface

16'

mold cavity

16"

front face

17

Strand pusher, longitudinal press ram

18

dipping direction, dipping movement

18'

retreat direction, retreat movement

19

strand drive

20

feeding unit

21

gear transmission

21a, b

bevel gear

22

Homokinetic universal joint

22a

Bullet

22b

Fork

23

rolling elements

24

Knife carrier guide

25

Blade carrier motor

26

feeder

27

conveyor

28a, b

pinion

29

timing belt

29a, b

drum

30

cutting unit

100

product piece

100"

strand cross-section

101

disc

110

portion

A

drive side

B

operator side

e

immersion speed

t

tangential speed

SP1

track

SP2

track

W

immersion path

Claims (15)

Slicing machine (1) for slicing a product piece (100) into slices (101), comprising a product support (16a) and a cutting unit (30) with - a blade (3) rotating about a blade axis with a Cutting edge (3a) on the outer circumference of the knife (3), - a knife carrier (24) in which the knife (3) is mounted in a rotating manner, - a carrier drive (8) for moving the knife carrier (6) back and forth between two end positions along blade carrier guides (24), - a blade motor (25) for driving the blade (3) in rotation, - a drive train running in particular transversely to the blade axis (3') between the blade motor ( 25) and knife (3), characterized in that the drive train is arranged and designed in such a way that when the knife (3) dips in the direction of the support plane of the product support (16a), the pivoting of the drive train that takes place at the same time can also take place without rotation of the Motor drive shaft (7) an additional rotation of the knife (3) in his he causes cutting direction of rotation. (Drive shaft: slicing machine claim 1 , characterized in that - the drive train comprises a drive shaft (7), - between the blade-side end of the drive shaft (7) and the blade (3) there is a blade-side drive deflection (9a), and/or - between the motor-side end between the drive shaft (7) and the motor there is a drive deflection (9b) on the motor side. (knife side:) Slicer according to one of the preceding claims, characterized in that - the knife-side drive deflection (9a) is a gear mechanism (21), in particular - a bevel gear mechanism (21) with two bevel gear wheels (21a, b) or - is a worm gear with at least one worm gear or - is at least one cardan joint or - is a deflection pinion (28b) of a drive belt (29). (motor side:) Slicer according to one of the preceding claims, characterized in that the motor-side drive deflection (9b) - is a universal joint (22), - is in particular a homokinetic universal joint (22). (Knife motor stationary:) Slicer according to one of the preceding claims, characterized in that the blade motor (5) is stationary and the drive shaft (7) is a sliding shaft of variable length. (drive belt :) Slicing machine according to one of the preceding claims, characterized in that - the drive train comprises a drive belt, in particular a toothed belt (29), running around two pinions (28a, b), - the pinion (28a) on the motor side being on the side of the The longitudinal center plane (10") containing the knife axis (3') and is arranged on that side of the knife plane (3") that when the pinion (28b) on the knife side moves in the immersion direction (18), the toothed belt (29) also moves around the stationary Motor-side pinion (28a) wound so that such a rotation of the blade-side pinion (28b) takes place, which causes rotation of the blade (3) in the cutting direction (25). (Carrier Drive:) Slicing machine according to one of the preceding claims, characterized in that - the carrier drive is a crank mechanism (4), - in particular a crank mechanism (4) driven in an oscillating manner, - in particular on the knife carrier (8) on both sides of the knife axis (3') each one crank drive (4) engages, - preferably the two crank drives (4) are driven synchronously, in particular by a common support motor (25). (immersion direction :) Slicing machine according to one of the preceding claims, characterized in that the direction (18) of immersion of the blade (3) is from top to bottom. (knife shape:) Slicing machine according to one of the preceding claims, characterized in that the blade (3) is plate-shaped and the cutting edge (3a) is designed in the shape of a segment of a circle or a circle. (stop plate:) Slicing machine according to one of the preceding claims, wherein - the slicing machine (1) comprises a stop (13) movable by means of a stop drive, in particular a stop plate (13), for the product piece (100), characterized characterized in that - the stop drive is a crank mechanism (14), - in particular a crank mechanism (14) driven in an oscillating manner. Slicing machine according to one of the preceding claims, characterized in that - a crank drive (14) acts on both sides of the single stop (13), - the two crank drives (14) are driven synchronously, in particular by a common stop motor (15) . (Multitrack:) Slicing machine according to one of the preceding claims, in which - the slicing machine (1) is a multi-lane slicing machine (1), characterized in that - on the stop (13) there is a drive at only one end, in particular a crank mechanism ( 14), - particularly in the case of a two-lane slicing machine (1), a drive, in particular a crank drive (14), acts on the stop (13) only at the outer end facing away from the blade axis, - the the two stop motors (15) are arranged on the same side with respect to the direction of passage (10*), the so-called drive side (A), when viewed from above. (drive side A:) Slicing machine according to one of the preceding claims, characterized in that the blade motor (5), the carrier motor (25) and optionally the at least one stop motor (15) viewed in plan are on the same side with respect to the direction of passage (10*) are arranged, the drive side (A). Method for improving the pulling cut, especially in the central area of the rotating knife (3) in the form of at least a segment of a circle, which is moved back and forth in an oscillating manner along a, in particular linear, plunge path (W) into a product piece (100) at a Slicing machine (1) according to the preamble das claim 1 , characterized in that - by means of the rotational drive of the blade (3) in the central area of the plunge path (W) when the blade (3) is displaced in the plunge direction (18), the pulling cut is improved by the design and arrangement of the drive train between blade motor (5) and blade (3), - in particular by means of at least one drive deflection (9a, b) between blade motor (5) and blade (3). procedure after Claim 14 , characterized in that - both the rotating knife (3) and the at least one stop (13) are moved back and forth linearly by means of a crank drive (4, 14) each, and/or - the, in particular all, drives of the slicing - machine (1) viewed from above are arranged on the same side with respect to the blade axis (3'), the so-called drive side (A).

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