CN112840068A - Method for regulating the pressure on a drawing frame - Google Patents
Method for regulating the pressure on a drawing frame Download PDFInfo
- Publication number
- CN112840068A CN112840068A CN201980067433.XA CN201980067433A CN112840068A CN 112840068 A CN112840068 A CN 112840068A CN 201980067433 A CN201980067433 A CN 201980067433A CN 112840068 A CN112840068 A CN 112840068A
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- Prior art keywords
- pressure
- rollers
- drafting
- drawing frame
- drafting mechanism
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/46—Loading arrangements
- D01H5/52—Loading arrangements using fluid pressure
- D01H5/525—Loading arrangements using fluid pressure for top roller arms
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
In a pressure regulating method for upper rollers (125-128) of a drafting mechanism, operating parameters influencing the load of the upper rollers (125-128) of the drafting mechanism are detected. In the partial process, the pressure of the rollers (125 and 128) on the drawing frame is detected and displayed by means of the detected operating parameters. The method allows the user to vary the pressure on the rollers (125-128) on the drafting mechanism. The method may include ascertaining whether the detected operating parameter is within a predetermined range, or ascertaining whether the detected operating parameter does not exceed or exceed a predetermined threshold. When the result is negative, the pressure on the rollers (125-128) on the draft mechanism is changed so as to appear that the given conditions have been satisfied. In order to press the upper drafting mechanism rollers (125 and 128) against the lower drafting mechanism rollers (129 and 131) by means of the pressure arms (121 and 124), a pressure drive section (139; 132, 133; 134, 135; 141) of a drafting mechanism device (120) having a drafting mechanism (120) is arranged, said drafting mechanism having a plurality of lower drafting mechanism rollers, upper drafting mechanism rollers and pressure arms (121 and 124). The controller (141) carries out the method by means of a pressure drive section (139; 132, 133; 134, 135; 141) for the upper roller (125) and 128) of the drafting device. The pressure drive section (139; 132, 133; 134, 135; 141) has a pressure regulator (141) which is connected between a pneumatic drive for the upper roller (125) and 128) of the drafting system and the associated pressure arm (121 and 124).
Description
Technical Field
The invention relates to a method for adjusting the pressure of elements of a drafting system.
Background
The drawing frame is essentially composed of a plurality of driven lower rollers against which one or more associated upper rollers press. Due to this pressing force, the upper roller is rotationally driven by the associated lower roller. The entrainment is facilitated by means of a preferably elastic friction jacket layer or friction lining, for example, on the upper roller. The fibrous material is additionally guided between the associated pairs of rollers. The pressing force fixes the fiber material tightly relative to the arrangement of the downstream lower and upper rollers, thereby achieving drafting. Not only the fastening of the fibre material but also the entrainment of the associated, pressed unwinding roll leads to wear of the mantle layer. Excessive compression forces promote faster wear. Further, the load of the bearing in which the roller is rotatably accommodated becomes large. These have to be designed accordingly, which is costly.
Disclosure of Invention
The object of the invention is to remedy the aforementioned disadvantages.
This object is solved by the subject matter of the independent claims. Advantageous developments are specified in the dependent claims.
According to the invention, a method for adjusting the pressure of a roller on a drafting system of a textile machine is specified. The method has a cycle here. The cycle comprises a first step of detecting at least one operating parameter of the textile machine affecting the load of the rollers of at least one drafting mechanism. The operating parameters relate, for example, to the fibre material used, the speed of operation of the rollers of the drawing frame and the climate. The loop further comprises a second step. The second step is divided into different sub-processes. The first subprocess comprises a first substep of determining the pressure of the roller on at least one drawing frame by means of the detected operating parameters. In a second sub-step of the sub-process, the determined pressure is displayed. In a third sub-step, the user is allowed to change the pressure on the roller on at least one drafting mechanism, for example by means of a touch-sensitive screen. A second sub-process is alternatively or additionally specified with respect to the first sub-process. The second sub-process includes a fourth sub-step of determining whether the detected operating parameter is within a predetermined range, or whether the detected operating parameter is below or above a predetermined threshold. If it has been determined that the detected operating parameter is outside said range or that the detected operating parameter exceeds or falls below said threshold value, said second sub-process comprises a fifth sub-step of varying the pressure on the rollers of the drafting mechanism such that it appears that the predetermined said operating parameter is within said range or meets or exceeds or falls below said threshold value. In other words, this relates to automated pressure regulation. On this basis, the loading of the drafting mechanism rollers can be optimized, so that the wear is less.
Before carrying out the aforementioned cycle, the method preferably also has an initial step of determining the range or threshold. This value is determined and used as a basis for the aforementioned adjustment, for example before the drafting unit starts to operate.
The initial step preferably comprises a step of allowing the input of the range or threshold value and/or a step of determining the range or threshold value on the basis of the processing speed of the textile machine and the fibrous material currently to be processed. In particular, the last-mentioned step allows the drafting device to be started up very quickly again on a batch change basis; the downtime is shortened.
The determination step is preferably carried out by reading a database in which at least speed data, data defining the fibrous material and data defining the pressure of the rollers on the drawing frame are associated with one another. The database thus displays a knowledge base for the adjustment of the drawing frames, so that only one necessary input has to be made.
Each of the aforementioned methods is preferably configured as an autonomous learning method. The advantage here is that the learning is monitored and can be carried out, for example, by the manufacturer on a newly designed drawing frame. This has the advantage that the drafting arrangement at the customer is ideally immediately ready for use without adjustment.
The aforementioned cycle is preferably repeated at regular intervals. This can result in the climatic conditions repeating over the first half of a day and varying over the course of a day, which causes the settings of the press rolls to change. Alternatively or additionally, the loop is implemented when a predetermined condition exists.
Such a state may comprise the exchange of the fibre material to be drawn or the exchange of the rollers or also the (re-) start of the drawing frame or textile machine.
In each of the aforementioned methods, the cycle may be performed a plurality of times depending on the number of rollers in the drawing frame to be monitored and/or in relation to the pressure of the rollers in the plurality of drawing frames. In the first case, the pressure to each lower roll is adjusted individually in the extreme case. In the second case, the pressure adjustment of a plurality of lower rolls is performed, in the extreme case the same pressure adjustment is performed for all lower rolls.
The operating parameters given above preferably include process output parameters of the drawing frame or of the textile machine and/or load data of at least one drive motor of the lower roller of the drawing frame, which is assigned to at least one upper roller of the drawing frame. In other words, simply sensorially determined data is sufficient to enable pressure regulation.
Each of the foregoing methods is preferably configured as a computer-implemented method. Thus, for example, the method can be provided as a firmware update, so that existing textile machines can also be retrofitted with the pressure regulation according to the invention.
The invention further relates to a drawing frame arrangement comprising a pressure-driven section, which has, for example, at least one pneumatic cylinder and at least one drawing frame. The drafting mechanism is provided with a plurality of drafting mechanism lower rollers, a plurality of drafting mechanism upper rollers and a plurality of pressure arms. The pressure arm is connected to the pressure drive section in such a way that the pressure drive section can press an associated upper roller of the drafting devices against an associated lower roller of the drafting devices via the pressure arm. Furthermore, the drawing frame arrangement comprises a controller or is connected to such a controller, for example via a bus. The control device is designed to carry out any of the aforementioned methods by means of at least one pressure drive section for the upper roller of the at least one drawing frame. In other words, the present invention can be put to practical use generally.
The textile machine according to the invention has such a drafting mechanism device. The pressure drive section comprises a pressure regulator which is connected between a pneumatic drive for the at least one drawing frame upper roller and a pressure arm which belongs to the at least one drawing frame upper roller. The pressure regulator relates to, for example, a membrane regulating valve.
The textile machine is preferably designed as a drawing frame, a lap frame, a combing machine, a roving frame or a spinning frame.
Drawings
Additional features and advantages of the present invention are set forth in the description of the preferred embodiments which follows. In the figure:
figure 1 shows a drafting arrangement of the type which,
figure 2 shows the drafting section of figure 1 in enlarged detail,
FIG. 3 shows an adjustment mode according to an embodiment of the invention, and
fig. 4 shows an adjustment according to another embodiment of the invention.
Detailed Description
Fig. 1 shows an arrangement 1 with a creel 2 and a downstream drawing frame 100 in a conventional arrangement.
The creel 2 is constructed in a known manner and is not described further.
Further, the drawing frame 100 has a can winding device 110 at an outlet side. In the example shown, the can winding device 110 comprises a can slide 111 for full cans and a can guide 112, which is preferably driven, and which can guide 112 moves empty cans into the actual can changer. In a known manner, the can changer has, for example, a can mover 113. An operating platform 102 is located at the side of the draw frame 100. The operator terminal 101 is here located at the end of the operator platform 102. Furthermore, a drafting mechanism cover 103 can be seen, which drafting mechanism cover 103 covers the drafting section 120 in a known manner.
Fig. 2 shows the drawing section 120 of fig. 1 in enlarged detail. The drafting section 120 is configured as a four-over-three drafting mechanism. In other words, the pulling section 120 has four upper rollers 125 and 128 (only the upper roller 125 and the upper roller 126 can be seen). The upper roller 125 is pressed by means of bearings 132, 133 and by means of pressure pistons 134, 135 against the associated lower roller 129, the upper roller 125 being freely rotatably mounted in the bearings 132, 133.
The upper roller 126 is accordingly pressed against the associated lower roller 130. The upper rollers 127, 128, which cannot be seen here, are pressed against the lower roller 131 by means of the pressure arms 123, 124.
On the left side, pneumatic lines 139 can be seen, through which lines 139 compressed air is conducted into the pressure arms 121 and 124. The pressure is alternatively directed only into the two pressure arms 121, 122 that are in front.
In addition, sensor lines 140 leading into the respective pressure arms 121 and 124 can be seen. A pressure sensor, for example, or a sensor which can determine the removal position of the associated upper roller 125 and 128, is arranged in the pressure arm 121 and 124.
Furthermore, pressure rods 136 and 138 can be seen, which likewise press against the respective upper rollers 125 and 127 in order to reduce or completely avoid the formation of windings.
Fig. 3 illustrates the manner of adjustment of the pulling section 120 shown in fig. 2. According to the embodiment shown here, a separate pressure regulator 141 is provided, which acts directly on each upper roller 125-. It is clear that this is only illustrative. The pressure regulator 141 is actually connected to the respective pressure cylinder, which is pressed by means of the associated piston 134, 135 onto the respective bearing 132, 133 of the associated upper roller 125.
An initial adjustment value is input to the pressure regulator 141 via a coupling or data connection 143. According to the invention, the adjustment value depends on the fibre material. Different adjustment values are input to the pressure regulator 141 depending on the friction coefficient and the setting of the drafting mechanism.
Via a sensor device 142, which may comprise a sensor, for example, as shown in fig. 2, values are input to the pressure regulator 141, which values influence the regulation of the pressure applied by the upper roller 125 and 128 to the appurtenant lower roller 129 and 131. Such a sensor value can be, for example, the maximum removal position of the respective upper roller 124 and 128. For example, if some wear of the jacket layer of the appurtenant lower roll 129-131 occurs, the resistance of this elastic jacket layer is reduced, so that the pressure regulator 141 transmits a reduced pressure to the appurtenant upper roll 129-131, which is lower than the pressure in the case of the jacket layer in the new state. The wear of the jacket layer of the associated lower roller 129-131 can thereby be reduced, which leads to a longer life cycle.
Fig. 4 shows an adjustment according to another embodiment of the invention. As can be seen, a separate pressure regulator 141 is associated with each lower roller 129 and 131 or the associated upper roller 120 and 128. Since the upper rollers 145 and 128 are usually provided with the same jacket layer, the same control values are correspondingly supplied to the pressure controller 141 via the respective coupling 143.
By virtue of the coupling of each pressure regulator 141 to its own sensor device 142 via the sensor line 140, each pressure regulator 141 can individually adjust the optimized pressure for the respective lower roller 129 and 131 or the associated upper roller 125 and 128. Since the upper rollers 127, 128 are pressed against the same lower roller 131, in the example shown, it is provided that the two upper rollers 127, 128 are loaded by means of a separate pressure regulator 141. However, it is of course also possible to assign a separate pressure regulator 141 to each upper roller 127, 128.
By means of the illustrated adjustment, the invention makes it possible to implement a method for adjusting the pressure of the upper drafting device rollers 125 and 128 relative to the associated lower rollers 129 and 131 of the drafting section 120. In a first step, at least one operating parameter is detected, which influences the load on the at least one drawing unit upper roll 125 and 128. Such operating parameters can take into account the fibrous material to be processed, the rotational speed of the respective lower drafting device rollers 129-131 and the ratio of this rotational speed to the rotational speed of the lower rollers 130, 131 directly upstream in the transport direction of the fibrous web.
In the first partial process of the second step of the method, the pressure of the respective upper roller 125-128 of the drawing frame is determined by means of at least one detected operating parameter. If, for example, it is seen that the jacket layer of the rollers 125 and 128 on the respective drawing frame is somewhat worn, the pressure is automatically reduced somewhat, for example on the basis of a database. In this sub-process, the determined pressure is preferably displayed to the user.
In a third sub-step of this sub-process, the user is also allowed to change the pressure. Whereby the automatically determined value can be changed, for example, on the basis of empirical values. The determined value therefore serves as a suggestion and thereby simplifies the handling of the pulling section 120. The pulling section 120 can thus likewise be operated by a less experienced user.
Alternatively or additionally to this sub-process, a second sub-process may be specified. The sub-process includes determining whether the detected operating parameter is within a predetermined range. This can be achieved by means of a conventional threshold analysis. If the operating parameter is outside this range, or if a predetermined threshold value is not reached in an admissible manner, or is lower or exceeds a predetermined threshold value, the pressure on the roller 125 and 128 of the associated drafting mechanism is adjusted in such a way that the predetermined operating parameter is brought within the desired range, or the threshold value analysis gives a positive result. The present method is therefore such that the pressure approaches the pressure necessary for frictionless operation of the pulling section 120. Furthermore, this avoids sudden changes in pressure, which can have a negative effect during drafting.
The range or threshold is preferably initially determined in a first step. Such a determination may, for example, comprise reading a database. However, it can of course also be provided that the range or the threshold value can be entered.
The method can also be designed as an autonomous learning method. This means that the pulling section 120 automatically adapts the pressure during the test run and preferably trains the associated pressure regulator 141 in the method so that it automatically adapts after a conventional learning process.
The above-described method steps form a repeatable cycle according to the invention. The repetition can be performed at regular intervals, for example once per hour, or when a predetermined condition exists. The state may be a change of the fiber material to be drawn, a change of the rollers, and/or a (re-) start of the drawing section 120 or of the draw frame 100.
The circulation is preferably carried out a plurality of times, in other words up to four times, depending on the number of rollers 125 and 128 on the drawing frame to be monitored, in the described drawing frame 120. If, as shown in the lower right in FIG. 4, the circulation involves a plurality of upper rollers 127 and 128 in the drawing frame at the same time, the circulation is carried out, for example, three times.
The aforementioned operating parameters may include process output parameters of the drawing section 120 or the drawing frame 100. Furthermore, load data of the drive motor (for example, the temperature of the drive motor) can be used to avoid overloading the drive of the pulling section 120. This allows the pulling section 120 to be braked, wherein, despite its reduced productivity, damage to the pulling section 120 and thus a stoppage of operation can be avoided.
The method according to the invention is preferably implemented by a computer.
The present invention is not limited to the foregoing embodiments.
The invention can be applied on any type of drafting section. This relates, for example, to drafting systems on lap-winders, combing machines, roving frames and spinning frames.
In addition, further groups of upper rolls 125 and 128 can likewise be assigned to the individual pressure regulators 141.
The pulling section 120 may likewise be designed additionally, i.e. comprise other numbers of upper and/or lower rolls.
The invention finally offers the possibility of being very simple and universally applicable for optimally adjusting the pressure of the upper drafting device roller 125-128 and thereby improving the service life of the upper drafting device roller 125-128 and improving the machine in its entirety.
List of reference numerals
1 draft arrangement
2 bobbin creel
100 drawing frame
101 operating terminal
102 platform
103 draft mechanism cover
110 can coiling equipment
111 barrel slide rail
112 can guide rail
113 can mover
120 draft section
121-
125-material 128 upper roller
129-131 lower roller
132. 133 bearing
134. 135 piston
136 and 138 pressure rod
139 pneumatic line
140 sensor circuit
141 pressure regulator
142 sensor device
143 coupling part
Claims (13)
1. A method for regulating the pressure of a roller (125-128) on a drafting mechanism of a textile machine (100), the method having a cycle comprising
First step: detecting at least one operating parameter of the textile machine (100), which influences the load on at least one drawing frame upper roll (125-128), and
a second step comprising
A first sub-process having
First substep: determining the pressure of the upper roll (125-128) of at least one of the drafting devices by means of the detected operating parameters,
second substep: displaying the determined pressure, an
Third substep: allowing the user to vary the pressure on at least one of the rollers (125-128) of the drafting mechanism, and/or
A second sub-process having
The fourth substep: determining whether the detected operating parameter is within a predetermined range or whether the detected operating parameter is below or above a predetermined threshold, and
a fifth substep: if it is determined that the detected operating parameter is outside the range or if it is determined that the detected operating parameter exceeds or falls below the threshold value, the pressure on the roller (125- & 128) on the drafting mechanism is varied such that the predetermined operating parameter appears to be within the range or to be at or above or below the threshold value.
2. The method of claim 1, further having an initial step of determining the range or threshold value prior to implementing the loop.
3. The method of claim 2, wherein the initial step comprises
A step of allowing entry of said range or threshold, and/or
A step of determining said range or threshold on the basis of:
-a processing speed of the textile machine (100), and
-the fibrous material currently to be processed.
4. Method according to claim 3, wherein the step of determining is performed by means of reading a database in which at least speed data, data defining the fibrous material and data defining the pressure on the roller (125-128) of the drawing frame are associated with each other.
5. The method according to any one of the preceding claims, configured as a method of autonomous learning.
6. Method according to any of the preceding claims, wherein said circulation is performed
Repeat at regular intervals, and/or
When a predetermined state exists, the operation is performed.
7. The method of claim 6, wherein the state comprises
Replacement of the fibrous material to be drawn,
replacement of rollers, and/or
-a (re) start of the drafting mechanism or textile machine (100).
8. Method according to any one of the preceding claims, wherein said one cycle
Multiple times depending on the number of rollers (125, 128) on the drawing frame to be monitored, and/or
The pressure of the rollers (125-128) on the plurality of drafting mechanisms.
9. The method of any preceding claim, wherein the at least one operating parameter comprises
A process output variable of the drafting device or the textile machine (100), and/or
Load data of at least one drive motor of the lower drafting mechanism rollers (129-.
10. The method of any one of the preceding claims, configured as a computer-implemented method.
11. Drawing mechanism device (120)
Includes
-a pressure driving section (139; 132, 133; 134, 135; 141), and
at least one drawing frame having
A plurality of lower rollers of the drafting mechanism,
a plurality of upper rollers (125-
A plurality of pressure arms (121-
-comprising a controller (141) or being coupled to a controller (141), the controller (141) being designed to carry out the method according to one of the preceding claims by means of at least one pressure drive section (139; 132, 133; 134, 135; 141) for at least one upper roller (125) and 128) of the drafting system.
12. Textile machine (100) having a drawing frame arrangement (120) according to claim 11, wherein the pressure drive section (139; 132, 133; 134, 135; 141) has a pressure regulator (141), the pressure regulator (141) being connected between a pneumatic drive for the at least one drawing frame upper roll (125) and the pressure arm (121) and the pressure arm (124) belonging to the at least one drawing frame upper roll (125 and 128).
13. Textile machine (100) according to claim 12, configured as
A drawing frame (100),
a machine for winding up the sliver,
the number of the combing machines is such that,
a roving frame, or
Spinning machines.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018125547.0A DE102018125547A1 (en) | 2018-10-15 | 2018-10-15 | Pressure control on a drafting system |
| DE102018125547.0 | 2018-10-15 | ||
| PCT/EP2019/074976 WO2020078651A1 (en) | 2018-10-15 | 2019-09-18 | Closed-loop pressure control in a drafting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112840068A true CN112840068A (en) | 2021-05-25 |
| CN112840068B CN112840068B (en) | 2023-04-28 |
Family
ID=67998472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980067433.XA Active CN112840068B (en) | 2018-10-15 | 2019-09-18 | Method for regulating pressure on drafting mechanism |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3867427A1 (en) |
| CN (1) | CN112840068B (en) |
| DE (1) | DE102018125547A1 (en) |
| WO (1) | WO2020078651A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19652372A1 (en) * | 1996-12-17 | 1998-06-18 | Zinser Textilmaschinen Gmbh | Pneumatic loading device of a drafting system in a spinning machine |
| CN1469945A (en) * | 2000-08-23 | 2004-01-21 | 吕特・英格尔纺织机械制造股份公司 | Method for operating drawing equipment and drawing equipment |
| CN1478932A (en) * | 2002-07-29 | 2004-03-03 | 特鲁菲舍尔股份有限公司及两合公司 | Device for loading on up roller of drawing system for fibre ribbon drawing frame |
| CN1854360A (en) * | 2005-04-29 | 2006-11-01 | 特鲁菲舍尔股份有限公司及两合公司 | Apparatus on a drafting system of a spinning machine for weighting the drafting system rollers |
| DE102011052367A1 (en) * | 2010-08-11 | 2012-03-08 | Rieter Ingolstadt Gmbh | Draw frame of a textile machine and method for its operation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011113367A1 (en) * | 2011-09-15 | 2013-03-21 | Trützschler GmbH & Co Kommanditgesellschaft | Device on a spinning preparation machine, in particular track, carding machine, combing machine or the like. with a drafting system |
| DE102014117241A1 (en) * | 2014-11-25 | 2016-05-25 | Rieter Ingolstadt Gmbh | Method for optimized stretching of at least one sliver in a textile machine and textile machine |
-
2018
- 2018-10-15 DE DE102018125547.0A patent/DE102018125547A1/en active Pending
-
2019
- 2019-09-18 CN CN201980067433.XA patent/CN112840068B/en active Active
- 2019-09-18 WO PCT/EP2019/074976 patent/WO2020078651A1/en unknown
- 2019-09-18 EP EP19772703.5A patent/EP3867427A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19652372A1 (en) * | 1996-12-17 | 1998-06-18 | Zinser Textilmaschinen Gmbh | Pneumatic loading device of a drafting system in a spinning machine |
| CN1469945A (en) * | 2000-08-23 | 2004-01-21 | 吕特・英格尔纺织机械制造股份公司 | Method for operating drawing equipment and drawing equipment |
| CN1478932A (en) * | 2002-07-29 | 2004-03-03 | 特鲁菲舍尔股份有限公司及两合公司 | Device for loading on up roller of drawing system for fibre ribbon drawing frame |
| CN1854360A (en) * | 2005-04-29 | 2006-11-01 | 特鲁菲舍尔股份有限公司及两合公司 | Apparatus on a drafting system of a spinning machine for weighting the drafting system rollers |
| DE102011052367A1 (en) * | 2010-08-11 | 2012-03-08 | Rieter Ingolstadt Gmbh | Draw frame of a textile machine and method for its operation |
| CN102373519A (en) * | 2010-08-11 | 2012-03-14 | 立达英格尔施塔特有限公司 | Spinning units and working steps of spinning machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018125547A1 (en) | 2020-04-16 |
| WO2020078651A9 (en) | 2020-06-11 |
| WO2020078651A1 (en) | 2020-04-23 |
| EP3867427A1 (en) | 2021-08-25 |
| CN112840068B (en) | 2023-04-28 |
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Effective date of registration: 20220527 Address after: The German city Minxin Gladbach Applicant after: Trutschler Group Europe Address before: The German city Minxin Gladbach Applicant before: TRuTZSCHLER GmbH & Co.KG |
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