阅读说明：本技术 用于旋转式压机的转子 (Rotor for a rotary press ) 是由 S·科尔贝 J·纳韦 F·沙德 于 2019-09-12 设计创作，主要内容包括：本发明涉及一种用于将产品压成压制物的旋转式压机的转子,转子包括借助于转动驱动装置转动地驱动的具有凹模孔的凹模盘、与凹模盘同步地转动的、用于轴向地引导上冲的上冲接纳部以及与凹模盘同步地转动的用于轴向地引导下冲的下冲接纳部,其中,设有固定不动的环形的导出通道,在转子运行时,导出通道从凹模盘和/或下冲接纳部接纳产品残留物,导出通道具有送出区域,从送出区域中送出产品,并且设置与凹模盘同步地转动地且在导出通道中被引导的带动元件,带动元件将位于导出通道中的产品输送到送出区域。(The invention relates to a rotor of a rotary press for pressing products into a pressed product, comprising a die plate which is driven in rotation by means of a rotary drive and has a die opening, an upper punch receptacle which rotates synchronously with the die plate and serves for axially guiding an upper punch, and a lower punch receptacle which rotates synchronously with the die plate and serves for axially guiding a lower punch, wherein a stationary annular discharge channel is provided, which receives product residues from the die plate and/or the lower punch receptacle during operation of the rotor, wherein the discharge channel has a discharge region from which the products are discharged, and wherein a driver element which is rotated synchronously with the die plate and is guided in the discharge channel is provided, which driver element conveys the products located in the discharge channel to the discharge region.)

1. A rotor for a rotary press for pressing a product into a compact, the rotor comprising: a die plate (12) having a die opening, which is rotationally driven by means of a rotational drive; an upper punch receiving portion (22) for axially guiding the upper punch, which rotates synchronously with the die plate (12); and a lower punch receptacle (18) rotating synchronously with the die plate (12) for axially guiding the lower punch, characterized in that a stationary, annular discharge channel (30) is provided, which receives product residues from the die plate (12) and/or the lower punch receptacle (18) during operation of the rotor, the discharge channel (30) having a discharge region from which the product is discharged, and a driver element (32) rotating synchronously with the die plate (12) and guided in the discharge channel (30) is provided, which conveys the product located in the discharge channel (30) to a discharge region (34).

2. The rotor as recited in claim 1, characterized in that the delivery area is a suction area (34), wherein a suction device is provided, which sucks product from the suction area (34).

3. Rotor according to any of the preceding claims, characterized in that at least the bottom of the lead-out channel (30) is arranged in a plane below the upper side of the punch-down receptacle (18).

4. Rotor according to any one of the preceding claims, characterised in that the outlet channel (30) is an outlet groove.

5. Rotor according to any one of the preceding claims, characterized in that the entraining element (32) is elastic.

6. Rotor according to one of the preceding claims, characterised in that the maximum width of the entraining element (32) is substantially equal to the width of the discharge channel (30).

7. Rotor according to one of the preceding claims, characterised in that the lower side of the entraining element (32) rests on the bottom of the discharge channel (30).

8. The rotor according to any of the foregoing claims, characterised in that the entraining element (32) is fixed to the lower punch receiving portion (18).

9. The rotor as claimed in one of the preceding claims, characterized in that a cover plate (26, 28) is provided which surrounds at least the die disc (12), the lower punch receiving portion (18) and the discharge channel (30).

10. The rotor as recited in claim 9, characterized in that a vacuum device is provided, which generates a vacuum relative to the surroundings of the shield (26, 28) within the area enclosed by the shield (26, 28).

11. A rotor according to claims 10 and 2, characterised in that the underpressure means are constituted by suction means.

Technical Field

The invention relates to a rotor of a rotary press for pressing a product into a compact, comprising a die plate having a die opening, which is driven in rotation by means of a rotary drive, an upper punch receptacle for axially guiding an upper punch, which rotates synchronously with the die plate, and a lower punch receptacle for axially guiding a lower punch, which rotates synchronously with the die plate.

Background

Such a rotor is known, for example, from DE 102015105936B 4. In a rotary press, most powder-type products are pressed into compacts, for example tablets. During the course of the pressing process, product residues are produced which accumulate in particular on the upper side of the die plate and on the upper side of the lower punch receptacle. In this way, the suction lines of the suction device, which should suck the product residues, are located at several positions of the rotor, in particular at several positions of the die plate and of the lower punch receptacle. The product residues can lead to contamination of the entire press space. Accordingly, cleaning is costly and, in particular, dirt-or dust-sensitive components have to be protected, for example, by a separate protective sheet. In order to minimize the dispersion of product dust, high suction power is required. This on the one hand impairs the efficiency and on the other hand leads to an undesirable loss of product in the region of the die plate. In particular in the region of the suction, product residues are also lifted and may be undesirably distributed in the press space.

Disclosure of Invention

Based on the explained prior art, the object of the invention is to provide a rotor of the type mentioned at the outset, by means of which reliable removal of product residues with a minimum risk of contamination of the press space is achieved in a structurally simple manner.

The invention achieves this object by the subject matter of independent claim 1. Advantageous embodiments are found in the dependent claims, the description and the drawings.

In a rotor of the type mentioned at the outset, the invention achieves this object by providing a stationary, annular discharge channel which receives product residues from the die plate and/or the lower punch receptacle during operation of the rotor, the discharge channel having a discharge region (aberdeiberich) from which the product is discharged, and by providing a driver element which is guided in the discharge channel and rotates synchronously with the die plate and which conveys the product located in the discharge channel to the discharge region.

The rotor according to the invention is used in a rotary press, in which a largely powdered product is pressed into a compact, for example into a tablet. The matrix disc with the matrix hole is rotationally driven by means of a rotational drive. The upper punch receptacle for axially guiding the upper punch and the lower punch receptacle for axially guiding the lower punch rotate synchronously with the die plate. The rotor according to the invention can also comprise an upper punch and a lower punch which are arranged in pairs to the die orifice and which surround the die disk synchronously. The lower punch receiving portion has a plurality of holes in which the lower punches are received. Accordingly, the upper punch receiving portion has a plurality of holes in which the upper punch is received. The upper and lower punches co-act in the holes of the die plate to press the product. The lower punch receiving portion may have an upper side having a ring disk shape. The upper punch receiving portion may have a lower side in the shape of a ring disk. The upper side of the lower punch receptacle may lie in a preferably horizontal plane. The underside of the upper punch receptacle can also lie in a preferably horizontal plane. The upper side of the punch receiving part and the lower side of the upper punch receiving part may lie in planes parallel to one another. The die plate also usually has an upper side which lies in a preferably horizontal plane and a lower side which is usually parallel to the upper side, whereby the lower side likewise lies in a preferably horizontal plane. The upper side of the lower punch receptacle, the lower side of the upper punch receptacle and the upper and lower sides of the die plate can lie in particular in planes parallel to one another. Further, the rotor may comprise an upper control curve controlling axial movement of an upper punch past the upper control curve and a lower control curve controlling axial movement of a lower punch past the lower control curve. The rotor furthermore has a drive for rotating the die plate together with the upper punch receptacle and the lower punch receptacle. The upper punch and the lower punch co-act in a known manner in the bore of the die plate for pressing the product into a compact. The matrix disc may be a closed annular disc or be formed of annular segments. The cavity opening can be formed by a detachable die sleeve inserted into the cavity plate or by a hole introduced directly into the cavity plate.

The invention also relates to a rotary press, in particular a rotary tablet press, having a rotor according to the invention. The rotary press then also comprises at least one filling device, in which the product to be pressed is filled into the holes of the cavity plate. The filling device can have, for example, a so-called filling cartridge, through which the product falls into the hole due to gravity. Furthermore, the rotary press comprises at least one pressing device, which may for example comprise an upper and a lower press roll, in which punches are pressed into the holes of the matrix disc against each other for pressing the product. After passing through the pressing device, the upper punch is pulled back from the hole in a manner guided through the upper control curve, and the lower punch is moved upward in a manner guided through the lower control curve to push out the compact produced in the hole. In a downstream sweeping device of the rotary press, the pressed product is swept from the upper side of the die plate to one or more discharge channels, through which the pressed product is discharged from the rotary press.

According to the invention, an annular stationary discharge channel is provided. The non-pressed product, for example in powder or powder form, is located in particular on the upper side of the die plate and on the upper side of the lower punch receptacle. From there, the product preferably reaches the discharge channel at least for the most part, in particular substantially completely, by centrifugal and gravitational forces. In particular, the product is thrown radially outward by centrifugal force out of the upper or lower punch receptacle of the die plate as a result of the rotation of the rotor and subsequently falls by gravity into the discharge channel. The discharge channel has a discharge area from which the product is discharged, in particular through a discharge opening of the discharge area. According to the invention, a driver element is also provided which rotates together with the die plate, is arranged in the discharge channel and is guided in the discharge channel during the rotation. The carrying element carries the product located in the discharge channel and conveys it to a discharge region, from which the product is discharged, for example from a press space of a rotary press into a waste or recovery container. The driver element rotates together with the rotor, in particular with the die plate and the upper and lower punch holders, in a stationary, different, i.e. non-rotating, discharge channel. At this point, the drive element can scrape the product off the bottom of the discharge channel in the form of a scraper and transport it to the discharge area. The drive element is thereby rotated through the dispensing region. As material for the entraining elements, for example, thermoplastics such as Polyoxymethylene (POM) can be considered.

Thus, according to the invention, the products are guided out partially mechanically to the discharge area and subsequently discharged from the discharge area. By conveying the product on the one hand to the discharge channel, in particular by centrifugal and gravitational forces, and on the other hand mechanically in the discharge channel to the discharge region, it is not necessary, in contrast to the prior art, to provide a large suction power in the vicinity of the die plate or lower punch receptacle, in particular at a plurality of points. Rather, a single discharge area is sufficient, from which the products that are mechanically conveyed to it are discharged. Thus, the area in the press space that may be contaminated by excess product, in particular powdered product, is minimized. Rather, a defined air flow is purposefully realized in the region of the discharge region. The additional shielding of the contamination-sensitive components required in the prior art is not required and the surfaces to be cleaned and thus the cleaning costs are reduced. The efficiency is increased on the one hand by the lower required suction power. On the other hand, no lifting of the excess product or undesired suction and thus product loss in the region of the die plate as in the prior art can occur.

According to a particularly practical embodiment, the discharge region can be a suction region, wherein a suction device is provided for sucking the product from the suction region. The suction device may enhance the product transport into the discharge channel. In particular, the suction device can generate a negative pressure in the region of the discharge channel, which assists the transport of product residues into the discharge channel. But this is not essential. As explained, it is possible in particular for the product transport into the discharge channel to take place exclusively by centrifugal force and gravity. The driving element is rotated through the suction region; due to the suction effect of the suction device, the product which is moved along by the drive element is now drawn out of the suction region.

Of course, the discharge channel can also have a plurality of discharge regions, in particular suction regions, according to the invention. These suction areas can then be connected to a suction device, respectively. However, it is also possible to provide a suction device for a plurality of suction regions. Obviously, a plurality of driver elements may also be provided.

According to one embodiment, at least the bottom of the discharge channel is arranged in a plane below the upper side of the punch-down receptacle. In particular, the entire discharge channel can be arranged in the region below the upper side of the punch-down receptacle. The discharge channel or its bottom is thus also located below the die plate, which is arranged above the upper side of the lower punch receptacle. In this embodiment, the product falls particularly easily and directly into the annularly encircling discharge channel. The outlet channel can be arranged, for example, on the outer edge of the die plate or of the lower punch receptacle. The outlet channel can be located below the lower punch receptacle and in a region radially outside the die plate or the lower punch receptacle completely or partially overlapping the die plate and/or the lower punch receptacle in the radial direction.

According to a particularly practical embodiment, the discharge channel can be a discharge groove. The lead-out channel may for example have a U-shaped cross section.

According to another embodiment, the driver element can be elastic. The carrying element can then rest against the bottom and/or the wall of the discharge channel with a slight elastic deformation, for example, and thereby carry the product particularly reliably.

According to a further embodiment, the maximum width of the driver element can be substantially equal to the width of the discharge channel. According to a further embodiment, the underside of the driver element can rest on the bottom of the discharge channel, in particular during the rotation. The shape of the driver element can be adapted to the cross section of the discharge channel in order to optimize the driving action further. In particular, the entraining element can rest against the base and the wall of the discharge channel, as already explained.

According to a further embodiment, the driver element can be fastened to the lower punch receptacle. The joint rotation of the driver element is thus achieved in a particularly simple structural manner.

Furthermore, a cover plate can be provided, which surrounds at least the die plate, the lower punch receptacle and the discharge channel, in particular in an annular manner. The cover plate can seal off the die plate, the lower punch receptacle and the discharge channel, in particular in a manner preventing powder or dust from escaping. The diffusion of product residues into the press space is particularly reliably prevented by such a cover plate which is arranged at a distance, in particular at a slight distance, from the enclosed assembly.

According to a further embodiment, a vacuum device can be provided, which generates a vacuum relative to the surroundings of the sheeting within the region enclosed by the sheeting. This underpressure prevents product residues, in particular powdery product residues, from escaping. According to a further particularly practical embodiment, the vacuum device can be formed by a suction device.

Drawings

Embodiments of the present invention are explained in detail below with reference to the drawings. Wherein, schematically:

figure 1 shows a rotor according to the invention in a partially cut-away perspective view,

figure 2 shows an enlarged detail of the illustration in figure 1,

FIG. 3 shows a cross-sectional view of the illustration in FIG. 2, an

Fig. 4 shows the representation in fig. 3 and schematically illustrates the product transport.

Detailed Description

The same reference numerals in the drawings denote the same objects unless otherwise specified.

The rotor according to the invention shown in the figures is a rotor of a rotary press, in particular a rotary tablet press, for pressing, for example, a powdered product into a compact, for example, a tablet. The rotor comprises a drive section 10, which is connected to a rotary drive for rotating the rotor, which is not shown in detail in the figures for reasons of simplicity. The cavity plate 12 is connected to the drive section 10. The matrix disc 12 has a plurality of sleeve receivers 14, in this example matrix sleeves inserted therein, so that the matrix sleeves form matrix holes of the matrix disc 12. Also for reasons of simplicity, the die sleeve is not shown in the figures. The die plate 12 has a plurality of radial bores 16 on the peripheral side, into which locking screws for retaining the die sleeve in a locking manner in the sleeve receptacle 14 can be inserted. This is known. In the example shown, the die plate 12 is configured as a closed annular plate. However, the die plate can also be formed from a plurality of individual ring segments. It is also conceivable to form the die holes by introducing holes directly into the die plate 12 instead of a detachable die sleeve. This is also known.

Furthermore, a lower punch receptacle 18 with a plurality of through holes 20 and an upper punch receptacle 22, likewise with a plurality of through holes 24, are connected to the drive section 10. During operation of the rotor, the lower punch is guided axially in the passage opening 20 of the lower punch receptacle 18 and the upper punch is guided axially in the passage opening 24 of the upper punch receptacle 22. The axial movement of the upper punch and the lower punch is controlled in a known manner by means of upper and lower control curves of the rotary press, so that the upper punch and the lower punch co-act in a likewise known manner for pressing the product in the die hole. In operation, the die plate 12, the lower punch receptacle 18 and the upper punch receptacle 22 are rotated synchronously by the rotary drive.

In reference numerals 26 and 28, a cover plate of the rotor, which is formed from two segments and is partially cut away in fig. 1 for explanatory reasons, can be seen, which cover plate surrounds the die disk 12 and the lower punch receptacle 18 and the annularly encircling discharge channel 30 in the illustrated example. In the example shown, the discharge channel 30 is designed as a discharge channel and is located below the lower punch receptacle 18 in the region of the outer edge thereof. As can be seen particularly well in the sectional view of fig. 3, there is a distance between the outer edge of the die plate 12 and the lower punch receptacle 18 and the upper section 26 of the cover plates 26, 28. As already explained, the discharge duct 30, which is delimited by the lower section 28 of the cover plates 26, 28, is annularly surrounded. The shields 26, 28 and thus the discharge channel 30 are stationary, i.e. do not rotate together when the rotor rotates.

Fig. 2 also shows a driver element 32, which is adapted in its shape to the cross section of the discharge channel 30. In the example shown, the driver element 32 is fixed to the lower punch receptacle 18, so that it rotates together with the latter. During this rotation, the driver element 32 is guided in the discharge channel 30. In the example shown, the driver element 32 is elastic and rests at least against the bottom of the discharge channel 30, preferably also against the side walls of the discharge channel 30. Furthermore, fig. 1 shows a suction opening 34 in the lower section 28 of the cover plates 26, 28, which forms a suction area. In fig. 2, it can be seen that a suction connection 36, which is not shown in fig. 1 for alignment reasons, is attached to the suction opening 34. A suction device, which is not shown in detail in the figures for reasons of simplicity, is connected to this suction connection 36.

During operation of the rotor, as explained, the product, in particular in powder form, is pressed in the die cavity to form a compact. At this point, it must occur that powdery or powdery product residues fall on the upper side of the die plate 12 and on the upper side of the lower punch receiving portion 18. As a result of the rotation of the die plate 12 and the lower punch receptacle 18, these product residues first leave radially outward due to centrifugal force and then pass through the illustrated distance between the outer edge of the die plate 12 and the lower punch receptacle 18 and the cover plates 26, 28 down into the discharge channel 30 due to gravity. The movement of the product remains is illustrated by the arrow 38 in fig. 4. In reference numeral 40, the accumulation of product residue at the bottom of the run-out channel 30 is schematically shown in an enlarged manner. By means of the entraining element 32, which rotates with the rotor during operation, product residues located in the discharge channel 30 are entrained and in particular conveyed into the suction region defined by the suction opening 34, where they are drawn off by the suction device via the suction connection 36, for example to a waste or recovery container. At this point, a slight underpressure can also be generated within the cover plates 26, 28 by the suction device, which underpressure prevents product residues from being able to escape from the area enclosed by the cover plates 26, 28 to the outside. However, this is not mandatory.

List of reference numerals

10 drive section

12 concave die plate

14 sleeve receiving part

16 radial holes

18 lower punch receiving portion

20 through the hole

22 upper punch receiving portion

Through the hole 24

26 guard board

28 guard board

30 drive element

34 suction opening/suction area

36 suction joint

38 arrow head

40 gathering part