JPH0839595A - Roll-replacing device in calender - Google Patents

Abstract

PURPOSE: To provide the roll replacing device in a calender for producing a profile strip material from an elastomer or an embossed sheet from a thermoplastic. CONSTITUTION: A calender stand 1 is equipped with a notch part 5 having a ring-shaped internal guide surface 6 whithin the regions of the roll support parts 12 of a roll carrying body 7 and the roll carrying body 7 is provided within the notch part in a revolvable manner so as to be coaxially guided along the internal guide surface 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a roll carrier, the roll carrier being swingably provided on a calendar stand, and the roll carrier being provided with a large number of rolls in a roll bearing portion. And a roll changer in a calender for making embossed sheets from elastomeric molded strips or thermoplastics, in a manner such that the roll bearing can be selectively swung in the direction of the calender's counter roll.

[0002]

2. Description of the Prior Art In the case of calendering an embossed sheet of elastomeric material or thermoplastic from an elastomer, the production is carried out using rolls equipped with a profile. If the profile of the profiled strip or the embossing of the sheet has to be changed, the roll with the profile must be replaced. However, such an exchange of a set of rolls is time consuming and therefore prolongs equipment time. The same thing
This is also the case, for example, when only the roll cylinder, which is formed with a roll profile, is replaced, as described in German Patent DE 35 06 423. In addition, in this case too, the risk of damage to the irregularly shaped surface when changing the roll cylinder. In addition, an additional preheating chamber for the roll cylinder, which is generally formed with roll profiles, is required. In particular, it has been found that, in a roll having such a deformed shape, the relatively thin-walled deformed cylinder becomes non-circular after a short working time, so that the circular rotational motion behavior thereof is deteriorated. Moreover, the unavoidable play between the roll and the roll cylinder causes relatively high product tolerances, which limit the range of use of such calendars. In particular, it is also a problem that the profiled roll cylinder gives the roll core a tendency to move laterally upwards.

It is already generally known to use a double embossing tool in an embossing calender for embossing a sheet made of a thermoplastic, and this double embossing tool is not known. One roll is mounted on a rotatable roll carrier, which is selectively pivotable in the direction of the opposite roll of the embossing calendar. In this case, the roll carrier is mounted on a concentric shaft which projects on both sides beyond the region of the roll and is mounted on a calender stand. Such an arrangement is relatively inexpensive to implement, but is unstable because the bearings have bearing points outside the ends of the roll bearings that are far apart from each other. However, it has a drawback that a large product tolerance occurs even if a slight embossing force is applied. Such an embossing calender can be used-if the higher product tolerances have been tolerated-to emboss a sheet of thermoplastics exclusively. An embossing tool of this known type is disclosed in the Applicant's publication, "Calendar Equipment for Processing Plastics."

[0004]

The problem underlying the present invention is that it enables very rapid roll changes and is very good even under high loads, such as is done when making profiled strips from elastomers. It is an object of the present invention to provide a roll exchanging device in a calendar that enables maintenance of product tolerances.

[0005]

SUMMARY OF THE INVENTION According to the present invention, the above-mentioned problem is that the calender stand is provided with a notch having a ring-shaped inner guide surface in the region of the roll bearing of the roll carrier. This is solved by the fact that the roll carrier is coaxially arranged in these notches and is guided along the inner guide surface so as to be rotatable.

Other configurations according to the invention are described in claims 2-8. The calender stand is provided in the region of the roll bearing of the roll carrier with notches having a ring-shaped inner guide surface, the roll carrier being coaxial with the notches and By being slidably guided along this inner guide surface, extremely high shape stability of the roll exchanging device carrying the roll can be achieved even under extremely high stress. To be For this purpose, the ring-shaped inward guide surface provided in the area of the calender stand, which is self-contained, is able to receive the forces occurring in the area of the roll bearing of the roll carrier in a form-stable manner. It is possible.

According to an advantageous embodiment of the invention, the roll carrier is provided with two rotating rims, roll bearings are provided in these rotating rims, and these rotating rims have at least one traverse. Are connected to each other via a guide, the rotary rims being provided with outer guide surfaces for guiding, the outer guide surfaces being the inner guide surfaces of the notches of the calendar stand. It is abutted so that it is actually guided over the entire surface. In such a configuration, the forces that occur in the roll bearings of the roll carrier are introduced directly into the rotary rims of this roll carrier, which rotary rims are in fact fully covered by their outer guide surfaces. It is supported by a guide surface inside the notch of the calendar stand. All forces are also introduced directly into the calender stand in the plane of the roll bearing. According to another configuration according to the invention, the outer guide surface of the rotary rim is provided on the segment parts--the roll bearings of the roll carrier being provided in the notches between them--so that the rotary rim of the rotary rim is Full contact of the outer guide surface with the guide surface of the calendar stand is guaranteed. At this time, no load occurs.

Furthermore, in the framework of the invention, the roll bearing of the roll carrier is provided in a roll bearing housing which is cardinally supported in the cutout of the rotary rim, so that the calender stand Rotational moments which lead to unfavorable deformations are prevented from acting on this calendar stand. The arrangement according to the invention makes it possible to maintain good product tolerances by means of the roll carrier arrangement, by means of a very stable bearing of the roll which is not impaired in any way.

Further, in the frame of the present invention, a traverse for connecting the rotary rim is provided in the rotary shaft of the roll carrier, and the roll carrier is used for roll replacement via the traverse. It can be turned by a drive mechanism. With this configuration, the roll carrier can be swung by a transmission mechanism having a simple structure and known per se. In addition to this, by providing the traverse in the rotation shaft of the roll carrier, it becomes possible to provide the temperature control connection portion to the traverse by using a simple means, and the roll support can be provided via this temperature control connection portion. A heating material can be introduced into the body to control the temperature of the roll provided in the roll carrier. The temperature adjustment connection provided in the rotary shaft of the roll carrier can be technically simple. Further, with this configuration, it is possible to adjust the temperature of all the rolls provided in the roll exchanging device in the calendar as needed, and thus it is not necessary to adjust the temperature in a separate preheating chamber. The advantage is obtained. All rolls are preheated in the calender and brought ready for use shortly after replacement.

Furthermore, according to the invention, four rolls are provided in the roll carrier which are structurally identical but are shaped with different profiles. By slightly swiveling the roll carrier, it is possible to swing the required roll of the calendar in the direction of its counterpart roll.
This process can be accomplished with very short equipment time, if profile changes in the product require roll changes. Further, it goes without saying that, in the roll carrier of the roll exchanging device, it is possible to use, for example, rolls which are not formed in a different shape, other than rolls which are formed in a different shape. Therefore, the field of use of the calendar is expanded. In addition, it is also possible for the rolls to be of particularly structurally identical design, whereby the rolls can optionally be exchanged for one another and replenished by structurally identical rolls present in the reservoir. In this case, it is necessary to change the rolls, but this can be done without problems during downtime, for example on weekends.

Further, within the framework of the present invention, the roll drive mechanism can be driven by a clutch capable of switching the rolls of the roll carrier that abuts against the counterpart roll of the calendar. The switchable clutch is disengaged very quickly before the roll carrier is swiveled and engaged after the new roll is positioned with respect to the other roll. In this case too, the technical outlay for this is low, especially the rapid exchange of rolls is not hindered.

Hereinafter, the present invention will be described in detail with reference to the embodiments illustrated in the accompanying drawings.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The drawing shows a calendar stand in which a counterpart roll 3 is supported in a roll support 2 in the calendar stand. The roll bearing 2 has a journal 4 which is pivotably mounted on the journal 4 in the calendar stand 1. Other means known per se, not shown in the drawing, provide a cardanic bearing.

The calendar stand 1 is provided with an annular notch 5 having a ring-shaped inner guide surface 6. Inside the cutout portion 5 of the calendar stand 1, a roll carrier 7 is provided coaxially. This roll carrier 7 is provided with two rotary rims 8 on both sides, these rotary rims having an outer guide surface 9 which abuts the ring-shaped guide surface 6 of the cutout 5 of the calendar stand 1. I have it. The outer guide surface 9 of these rotary rims 8 is provided in a segment-shaped portion 10 interrupted by a notch 11, in which the roll carrier 7 is provided. A roll bearing 2 for the rolling roll 13 is provided. The roll bearing 2 of the roll 13 is pivotably supported on the journal 14 in the notch 11. Furthermore, other means known per se, not shown in the drawing, provide a cardanic bearing. This cardan-like bearing ensures avoidance of edge pressure in the roll bearing 12.

The rotary rim 8 of the roll carrier 7 is provided with a traverse 1 provided in a rotary shaft 14 of the roll carrier 7.
5, which are connected to each other for positive rotation. The traverse 15 is operatively connected to a roll carrier drive mechanism 17 via a drive shaft 16. This traverse 15 is provided with a temperature control connection part 18, and a heating material for controlling the temperature of the roll 13 provided in the roll carrier 7 in the hollow space 19 at the center thereof via the temperature control connection part. Can be introduced. The heating material is introduced into the rolls 13 via temperature control connections 20 provided on these rolls, which temperature control connections are connected to the traverse 15 via conduits not shown. There is. A heating material is introduced into the partner roll 3 via another temperature control connection portion 21.
With such a configuration, it is possible to adjust the temperature of all the rolls 13 at all times or as needed. Therefore, the work preparation state can be obtained immediately after the rolls of the calendar are replaced, and at that time, the rolls 13 existing at the work position can be obtained. There is no need to heat 3 again.

As is clear from FIG. 2, the calendar stand 1 of the calendar is provided on a substrate 22 and is joined to this base plate by welding. A roll drive mechanism 23 is provided beside the calendar stand 1, and this roll drive mechanism is formed by a drive motor and a transmission mechanism which are not shown in the drawings. Further, the roll driving mechanism 23 is provided with a roll carrier driving mechanism 17. The drive shaft 24 is operatively connected to the partner roll 3 and drives this partner roll during the work of the calendar. The other roll drive shaft 25 has a switchable drive clutch 26.
It is possible to couple with the rolls 13 of the roll carrier 7 which are in contact with the counterpart rolls 3 respectively. At this time, the rolls 13 present at the respective work positions are driven via the roll drive shaft 25 during the work of the calendar.

In order to adapt the calender to different shaped strips of differently shaped profiles or to different embossings on the sheet, the roll carrier drive mechanism 17 drives the roll carrier 7 into a roll 13 with the desired profile.
It is possible to make a turn so as to turn and contact the opponent roll 3. For this purpose, the drive mechanism clutch 26 only has to be disengaged and re-engaged on the rolls 13 present in the area of the counterpart roll 3, so very quickly in different situations where a calendar is required. Can be adapted to. In addition to this, since all the rolls 13 are temperature-controlled in the calender, the waiting time required in the calender according to the known art until the rolls 13 brought into their working position are heated to the required temperature. Disappears. Since the roll carrier 7 is exactly supported on the rotating rim 8 in the ring-shaped inner guide surface 6 of the notch 5 of the calender stand 1, the correct circular rotation is achieved by the roll 13 When positioning
This is done in the work play in the area of the opponent roll 3. The self-closing notch 5 of the calender stand 1 ensures a good reception of the nipple force, in which case the calender stand 1 is subjected even to extremely high pluck forces, such as occurs when producing profiled sheets from elastomers. There is no disadvantageous deformation in the inner region or in the roll carrier 7. In particular, it has also been found to be advantageous to provide the roll bearing 12 directly in the area of the cutout 5 of the calendar stand 1. This is because the force is directly absorbed by the calendar stand 1 in the plane of the roll bearing 12. Deformation of the roll 13 and impediment to the circular running accuracy, ie the production of bending moments which lead to product tolerances, are avoided.

[0018]

The changer according to the invention makes it possible to change rolls quickly and to maintain very good product tolerances even under high loads, such as is done when producing profiled strips from elastomers. Becomes

[Brief description of drawings]

FIG. 1 is a front view of a calendar including a roll changing device.

2 is a schematic side view of the calendar according to FIG.

[Explanation of symbols]

 1 Calendar Stand 2 Roll Bearing 3 Opposite Roll 4 Journal 5 Notch 6 Ring Inner Guide Surface 7 Roll Carrier 8 Rotating Rim 9 Outer Guide Surface 10 Segmented Part 11 Notch 12 Roll Bearing 13 Roll 14 Rotating Shaft 15 Traverse 16 Drive Shaft 17 Roll Carrier Drive Mechanism 18 Temperature Control Connection 19 Hollow Airspace 20 Temperature Control Connection 21 Temperature Control Connection 22 Substrate 23 Roll Drive Mechanism 24 Drive Shaft 25 Roll Drive Shaft 26 Drive Clutch mechanism

Claims (8)

[Claims] 1. A roll carrier (7) is provided, the roll carrier is swingably provided on a calendar stand (1), and a large number of rolls (13) are supported on the roll carrier. It is provided in the section (12),
In a roll changer in a calendar for making an embossed sheet from a profiled strip material from an elastomer or a thermoplastic in such a manner that this roll bearing can be selectively swung in the direction of the opposite roll (3) of the calendar, The stand (1) comprises a notch (5) with a ring-shaped inner guide surface (6) in the region of the roll bearing (12) of the roll carrier (7),
A roll exchange in a calendar, characterized in that a roll carrier (7) is coaxially guided in these notches and is guided along the inner guide surface (6) so as to be rotatable. apparatus. 2. The roll carrier (7) comprises two rotating rims (8) in which roll bearings (12) are provided, and these rotating rims have at least one of them. Connected to one another via two traverses, and said rotating rim (8) is provided with an outer guide surface (9) for guiding, these guide surfaces being the calendar stand (1). The roll exchanging device according to claim 1, wherein the roll exchanging device is provided so as to be guided by contacting the guide surface (6) inside the notch (5) almost entirely. 3. An outer guide surface (9) of the rotating rim (8) is provided in the segmental parts (10) and rolls into the notches (11) between these segmental parts. 3. The roll exchanging device according to claim 1, further comprising a roll supporting portion (12) of the carrier (7). 4. A roll bearing portion (1) of a roll carrier (7).
The roll changer according to any one of claims 1 to 3, characterized in that 2) is supported like a cardan in the notch (11) of the rotating rim (8). apparatus. 5. A traverse (15) connecting the rotating rim (8) is provided in the rotary shaft (14) of the roll carrier (7), and the roll carrier (7) is a roll (13). The roll changer according to any one of claims 1 to 4, wherein the roll changer can be swung by a roll carrier driving mechanism (17) via a traverse (15) for changing the roll. apparatus. 6. The traverse (15) has a temperature control connection (1).
8), and a heating material for adjusting the temperature of the roll (13) provided in the roll carrier (7) is introduced into the roll carrier (7) through the temperature control connection portion. The roll exchanging device according to any one of claims 1 to 5, which is configured to be possible. 7. The roll carrier (7) is provided with four rolls (13) which are structurally identical, but are formed with different profiles, according to claim 1. The roll exchanging device according to any one of items 6 to 6. 8. A roll drive mechanism (2) via a switchable clutch (26) for the rolls (13) of the roll carrier (7) which respectively abut against the opposing rolls (3) of the calendar.
The roll changing device according to any one of claims 1 to 7, wherein the roll changing device is configured to be driven by 3).