WO2022042791A1 - Pièce en matière plastique pourvue d'un filetage intérieur et procédé de production d'une pièce en matière plastique - Google Patents

Pièce en matière plastique pourvue d'un filetage intérieur et procédé de production d'une pièce en matière plastique Download PDF

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Publication number
WO2022042791A1
WO2022042791A1 PCT/DE2021/100648 DE2021100648W WO2022042791A1 WO 2022042791 A1 WO2022042791 A1 WO 2022042791A1 DE 2021100648 W DE2021100648 W DE 2021100648W WO 2022042791 A1 WO2022042791 A1 WO 2022042791A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
plastic part
tool
plastic
trapezoidal
Prior art date
Application number
PCT/DE2021/100648
Other languages
German (de)
English (en)
Inventor
Lukas Jakob
Juergen Gilmer
Sven Hachmann
Robert DRESSEL
Original Assignee
Schaeffler Technologies AG & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN202180053055.7A priority Critical patent/CN115989101A/zh
Priority to EP21751970.1A priority patent/EP4204718A1/fr
Publication of WO2022042791A1 publication Critical patent/WO2022042791A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/261—Moulds having tubular mould cavities
    • B29C45/2612—Moulds having tubular mould cavities for manufacturing tubular articles with an annular groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2618—Moulds having screw-threaded mould walls
    • B29C45/262—Moulds having screw-threaded mould walls provided with unscrewing drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2681—Moulds with rotatable mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2001/00—Articles provided with screw threads
    • B29L2001/005—Nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H2025/249—Special materials or coatings for screws or nuts

Definitions

  • the invention relates to a plastic part which is suitable for use as a component of a movement thread and has an internal thread in the form of a trapezoidal thread. Furthermore, the invention relates to a method for producing such a plastic part with an internal thread by injection molding.
  • DE 10 2010 005 145 A1 discloses a screw drive which includes metallic components and plastic components.
  • Either the nut or the spindle can be a part that is at least partially made of metal, while the other component of the screw drive is at least partially made of plastic.
  • the nut and spindle have trapezoidal threads as components of the screw drive. The flanks of the trapezoidal thread are followed by first curves in the area of the thread crests and second curves in the area of the thread root.
  • Plastic parts with an internal or external thread can in principle be produced by primary shaping, in particular injection molding, or by machining.
  • DE 10 2015 225 247 A1 discloses an injection molding device for producing pipes with internal threads.
  • a tool forms an article cavity which is to be filled with a thermoplastic molding compound.
  • a projectile is provided as a displacement body for the molding compound.
  • Another device for injection molding a plastic body with an internal thread is described in DE 197 24 204 A1.
  • the plastic body can be a screw cap.
  • the thread of the plastic body is in the form of individual thread segments.
  • DE 10 2018 116 216 A1 discloses a device for unscrewing internal threads in injection molded parts using an electrically controlled drive. With the help of limit switch rings, it should be possible to identify whether a threaded core is screwed into a mold or unscrewed from the mould.
  • the object of the invention is to achieve progress in the injection molding production of plastic parts with an internal thread, with regard to both a rational production process and the durability of the end product.
  • plastic part with the features of claim 1, wherein the plastic part can be designed as a tubular part or as a part with any other external contour.
  • the object is also achieved by a method for producing such a plastic part according to claim 7.
  • Embodiments and advantages of the invention explained below in connection with the production method also apply to the device, i.e. the plastic part provided with an internal thread, and vice versa.
  • the internal thread of the plastic part is designed as a trapezoidal thread and is arranged concentrically to the central axis of the plastic part.
  • the internal thread runs out towards at least one of the two end faces of the plastic part.
  • At the at least one thread run-out of the trapezoidal thread there is an end surface, the extent of which in the axial direction of the internal thread and thus of the entire plastic part corresponds at least to the pitch of the internal thread, with between the end surface and an imaginary central plane in which the Central axis of the internal thread is located and which touches the end surface at the edge facing away from the end face, an acute angle is enclosed.
  • the end surface is inclined by at least 15° and at most 75° relative to the central plane, with the end surface, viewed in the longitudinal direction of the tubular plastic part, extending over a tooth and the subsequent root of the thread to the beginning of the flank of the next tooth.
  • the closing surface with which the trapezoidal thread ends towards the end face of the tubular plastic part, extends radially outward beyond the trapezoidal thread.
  • the section of the end surface that extends radially outwards over the end surface can be more extensive in the radial direction of the plastic part than the section of the end surface that lies within the trapezoidal thread.
  • the section of the end surface lying radially outside of the trapezoidal thread can be within a tubular Be arranged end piece of the plastic part, wherein the end piece as well as the trapezoidal thread is an integral part of the plastic part.
  • the pitch of the trapezoidal thread is widened at the end of the thread in comparison to the rest of the trapezoidal thread.
  • the widening extends over the last turn of the trapezoidal thread. This widening, which is equivalent to the fact that the distance between two opposite flanks of the trapezoidal thread profile delimiting a tooth gap is increased, production-related shape deviations can be compensated. It is true that the suitability of the trapezoidal thread to absorb axial forces is within the last one, which extends to the end of the thread Reduced thread pitch, but this disadvantage is overcompensated by excluding overloading in the same thread section.
  • the widening of the last thread can be designed asymmetrically. This means that one of the named flanks continues the contour of the thread profile given in the further course of the thread unchanged, whereas material is removed on the opposite flank in comparison to the rest of the thread.
  • the asymmetrical design of the area of the trapezoidal thread adjoining the end of the thread has the advantage that the full load-bearing capacity of the thread is retained in exactly one axial direction.
  • the plastic part can represent a complete spindle nut of a screw drive. Designs are also possible in which the plastic part forms a spindle nut together with other, in particular metallic, components. In any case, the plastic part, which has the trapezoidal thread as an internal thread, can be produced in the following steps:
  • a first, bolt-shaped, in particular multi-part, tool component suitable for plastic injection molding which has an external thread profiled according to the profile of the trapezoidal thread to be produced on the plastic part, this tool component having an end surface terminating the external thread, the extent of which in the axial direction corresponds at least to the thread pitch of the external thread and thus also corresponds to the trapezoidal thread, and between the end surface and an imaginary central plane in which the central axis of the external thread and thus also of the later trapezoidal thread lies and which touches the end surface at its edge facing the external thread, i.e. the edge facing away from the end face of the tool acute angle is included,
  • the first tool component which is generally bolt-shaped, is preferably composed of several tool parts.
  • One of these tool parts, which together form the first tool component, has a trapezoidal spotting surface that seamlessly continues the end surface and lies in the same plane, which is in planar contact with a second tool part.
  • the second tool part has no external thread.
  • the end surface of the first tool specifies the position and shape of the described end surface of the injection-molded plastic part.
  • the spotting surface of the first tool part lies flat against the second tool part within the assembled first tool. This ensures that the spotting surface forms the end of the thread turn of the internal thread of the plastic part during injection molding.
  • the plastic part can be removed from the first, multi-part tool by spindle-boring the first tool part and removing the second tool part in the axial direction from the plastic part without rotating it.
  • the multi-part injection molding tool is designed in such a way that the end of the thread of the plastic part is inclined at an acute angle in the direction of spindle removal.
  • This design has advantages over conventional solutions with a comparatively sharp-edged thread run-out, both with regard to the durability of the tools and the durability of the product manufactured with them.
  • By avoiding sharp edges on the injection molding tool technically relevant deformations during the use of the tool, which have a direct impact on the Shape of the workpieces produced, ie plastic parts would affect, practically impossible. This also applies in cases where the trapezoidal thread has a particularly low pitch.
  • the plastic part which has an internal thread designed as a trapezoidal thread, can be used, for example, as a rotating component or as a non-rotatable, exclusively displaceable component of a screw drive, ie a movement thread.
  • the associated counter-component provided with an external thread, ie spindle can also be made either of plastic or of metal.
  • the entire screw drive is part of an electromechanical actuator, for example. Such actuators are used, inter alia, in parking brakes of motor vehicles.
  • 3 shows the end of the thread of the internal thread in a sectional view
  • 4 shows a first, multi-part tool component for the production of the plastic part according to FIG. 1 by injection molding
  • FIG. 5 shows a detail of the tool component according to FIG. 4,
  • FIG. 6 a simplified representation of a detail of a second tool component for the production of the plastic part according to FIG. 1 by injection molding
  • FIG. 8 shows a detail of the arrangement according to FIG.
  • a plastic part identified overall by the reference numeral 1 is provided for use in a screw drive, not shown in any more detail, which is designed as a simple motion thread.
  • the plastic part 1 has a trapezoidal thread as an internal thread 2 and acts as the spindle nut of the screw drive.
  • the associated threaded spindle, not shown, is driven electrically, for example.
  • a lateral surface of the plastic part 1 is denoted by 3 and an end face by 4 .
  • a web 5 extends over the entire length of the lateral surface 3 and serves to prevent the plastic part 1 from rotating within a surrounding structure. In a modified embodiment, not shown, several such webs 5 can be evenly distributed around the circumference of the lateral surface 3 .
  • the plastic part 1 has a tubular shape; an inner peripheral surface adjoining the end face 4 is denoted by 6 .
  • FIGS. Thread flanks 7 and a thread root 8 Details of the internal thread 2, which is designed as a single thread, are shown in particular in FIGS. Thread flanks 7 and a thread root 8 can be seen.
  • the thread end of the internal thread 2 is total marked with 9.
  • An inner edge 11 of the closing surface 10 lies opposite the front edge 12 .
  • the entire thread end 9 is located in an end piece 13 of the plastic part 1 , the outer peripheral surface of the end piece 13 being an integral part of the lateral surface 3 .
  • the two edges 11, 12 are aligned in the radial direction of the tubular plastic part 1, whose central axis is denoted by MA.
  • the inner edge 11 represents a surface normal of the plane of the drawing.
  • the inner edge 11 lies in a central plane ME, in which the central axis MA also lies.
  • the end surface 10 is inclined relative to the center plane ME by an angle a of less than 75°, in the exemplary embodiment even by less than 45°.
  • the width of the end surface 10 measured in the longitudinal direction of the central axis MA corresponds to the pitch P of the internal thread 2.
  • the internal thread 2 is a single-start trapezoidal thread with a nominal diameter d.
  • the inner peripheral surface 6 has a diameter de which, in the exemplary embodiment, is at least one third larger than the nominal diameter d.
  • a first tool component 14 which is composed of two tool parts 21 , 22 , has a bolt-like basic shape and is provided with an external thread 15 which defines the shape of the trapezoidal thread 2 .
  • An end surface 16 can be seen in FIGS. 4, 5, 7, 8, with which the end surface 10 of the plastic part 1 is produced.
  • the injection molding tool 14, 18 is completed by a second tool component 18, which is outlined in highly abstract form in FIG.
  • the second tool component 18, like the first tool component 14, is constructed in several parts.
  • a longitudinal groove 19 in the second tool component 18 forms the web 5 of the plastic part 1 .
  • a cavity is formed in the assembled injection molding tool 14, 18, in which case a lateral surface 20 of the first tool tool component 14 can contact an inner peripheral surface of the second tool component 18 .
  • the multi-part structure of the first tool component 14 is shown in detail in FIGS.
  • the external thread 15 is located on the outer peripheral surface of the first tool part 21, which is longer in the exemplary embodiment, whereas the second tool part 22, which is comparatively short in the present case, has no thread.
  • the first tool part 21 is partially pushed into the second tool part 22 .
  • the tool parts 21, 22 are pulled apart somewhat in order to make geometric details visible.
  • the end surface 16 is provided by the second tool part 22, which is also referred to as the counter-mold part of the first tool part 21, i.e. the molded part with an external thread.
  • the end surface 16 has, as can be seen in particular from FIG. 8, a touching surface 16 as an integral part of this surface 16, the touching surface 16 lying flat on the tool part 21 within the assembled tool component 14 and is therefore no longer visible in this state.
  • the section of the end surface 16 lying outside of the inking surface 16 is referred to as the open section 24 of the end surface 16 and specifies the shape of the end surface 10 of the plastic part 1 .
  • the spotting surface 16 forms the end of the thread of the trapezoidal thread 2 and is contoured in a trapezoidal manner in accordance with this. Within the trapezoidal thread 2, this surface, the shape of which is specified by the spotting surface 16, is an imaginary surface which adjoins the connection surface 10 and represents the end of the thread turn at the thread outlet 9.
  • the inner tool component 14 together with the molded plastic part 1 can be removed from the outer tool component 18.
  • the separation of the two tool parts 21, 22 from the plastic part 1 is possible in that the first tool part 21 is screwed out of the trapezoidal thread 2 in the spindle-boring direction AR (FIG. 3), that is, spindled out.
  • the workpiece, ie plastic part 1 can then be separated from the second tool part 22 by the second tool part 22 being pulled off the workpiece 1 in the axial direction.
  • the second tool part 22 can also be spindled out and/or pulled off while the plastic part 1 is still in the second tool component 18 or in an individual part of this tool component 18.
  • the bolt-shaped tool component 14 is designed in such a way that the thread base 8 is in the area of the thread outlet 9 compared to the rest of the internal thread
  • a thread flank 7 is indicated in dashed lines in FIG.
  • the thread flank 7 at the thread outlet 9 is offset by an additional width s, so that the thread root 8 is widened accordingly.
  • the last turn of the thread of the internal thread 2 carries only on one side. If a mold misalignment occurs during injection molding, which corresponds at most to the additional width s, this would have no effect on the functionality of the trapezoidal thread 2, since there would be no impermissible narrowing of the last thread turn.
  • the possibly slightly reduced axial load capacity of the internal thread 2 in a specific direction is accepted.
  • Reference character list which is expressed in the form of the inner peripheral surface 6, which lies radially outside the nominal diameter d of the internal thread 2, promotes both the stability of the finished plastic part 1 and the stability of the connection between the tool components 14, 18 during the injection molding production of the plastic part 1 .
  • Thread run-out 0 Closing surface 1 Inner edge of the closing surface 2 Front edge of the closing surface 3 End piece 4 First tool component, bolt-shaped 5 External thread 6 End surface of the shorter tool part 7 Two flats 8 Second tool component 9 Longitudinal groove 0 Lateral surface of the first tool 1 Tool part with external thread 2 Tool part without external thread 3 Marking surface 4 open section of end face a angle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Une pièce tubulaire en matière plastique (1) appropriée pour être utilisée dans une transmission à vis présente un filetage intérieur (2) réalisé sous la forme d'un filetage trapézoïdal, qui se termine au niveau d'une face d'extrémité de la pièce en matière plastique (1), une face de terminaison (10) étant située à l'extrémité de filetage (9), l'extension de ladite face de terminaison dans la direction axiale du filetage intérieur (1) correspondant au moins au pas (P) dudit filetage, un angle aigu (α) étant formé entre la face de terminaison (10) et un plan médian imaginaire (ME), dans lequel se trouve l'axe central (MA) et qui touche la face de terminaison (10) au niveau du bord (11) de celui-ci opposé à la face d'extrémité.
PCT/DE2021/100648 2020-08-27 2021-07-28 Pièce en matière plastique pourvue d'un filetage intérieur et procédé de production d'une pièce en matière plastique WO2022042791A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180053055.7A CN115989101A (zh) 2020-08-27 2021-07-28 具有内螺纹的塑料件和用于制造塑料件的方法
EP21751970.1A EP4204718A1 (fr) 2020-08-27 2021-07-28 Pièce en matière plastique pourvue d'un filetage intérieur et procédé de production d'une pièce en matière plastique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020122372.2 2020-08-27
DE102020122372.2A DE102020122372B3 (de) 2020-08-27 2020-08-27 Kunststoffteil mit einem Innengewinde und Verfahren zur Herstellung eines Kunststoffteils

Publications (1)

Publication Number Publication Date
WO2022042791A1 true WO2022042791A1 (fr) 2022-03-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2021/100648 WO2022042791A1 (fr) 2020-08-27 2021-07-28 Pièce en matière plastique pourvue d'un filetage intérieur et procédé de production d'une pièce en matière plastique

Country Status (4)

Country Link
EP (1) EP4204718A1 (fr)
CN (1) CN115989101A (fr)
DE (1) DE102020122372B3 (fr)
WO (1) WO2022042791A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724204A1 (de) 1997-06-09 1998-12-10 Richard Herbst Verfahren und Vorrichtung zum Spritzgießen eines Kunststoffkörpers mit Innengewinde
JP2004025527A (ja) * 2002-06-24 2004-01-29 Ntn Corp 送りねじ装置用樹脂ナットの射出成形金型および製造方法
DE202010000305U1 (de) * 2010-02-16 2010-09-09 C. Rob. Hammerstein Gmbh & Co. Kg Spindelmutter eines Spindelantriebs aus gefülltem Kunststoff
DE102010005145A1 (de) 2010-01-19 2011-07-21 Honeywell Technologies S.A.R.L. Gewindetrieb aus Kunststoff und Metall mit einer Gewindemutter und einer Gewindespindel
DE102015225247A1 (de) 2015-12-15 2017-06-22 Kautex Textron Gmbh & Co. Kg Spritzgießvorrichtung zur Herstellung von Rohren mit hinterschnittener Innengeometrie, vorzugsweise mit Innengewinde sowie Verfahren zur Herstellung von Rohren mit hinterschnittener Innengeometrie, vorzugsweise mit Innengewinde durch Spritzgießen
DE102017123566A1 (de) * 2016-10-10 2018-04-12 Grammer Ag Getriebe sowie Kopfstütze mit wenigstens einem elektrischen Antrieb, umfassend ein Getriebe
DE102018116216A1 (de) 2018-07-04 2020-01-09 Desoi Gmbh Vorrichtung zum Entspindeln von Innengewinden in Spritzgussteilen mit Hilfe eines elektrisch gesteuerten Antriebs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005042758B3 (de) 2005-09-08 2007-03-08 Tecpharma Licensing Ag Vorrichtung und Verfahren zur Herstellung eines Objektes mit Innengewinde

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724204A1 (de) 1997-06-09 1998-12-10 Richard Herbst Verfahren und Vorrichtung zum Spritzgießen eines Kunststoffkörpers mit Innengewinde
JP2004025527A (ja) * 2002-06-24 2004-01-29 Ntn Corp 送りねじ装置用樹脂ナットの射出成形金型および製造方法
DE102010005145A1 (de) 2010-01-19 2011-07-21 Honeywell Technologies S.A.R.L. Gewindetrieb aus Kunststoff und Metall mit einer Gewindemutter und einer Gewindespindel
DE202010000305U1 (de) * 2010-02-16 2010-09-09 C. Rob. Hammerstein Gmbh & Co. Kg Spindelmutter eines Spindelantriebs aus gefülltem Kunststoff
DE102015225247A1 (de) 2015-12-15 2017-06-22 Kautex Textron Gmbh & Co. Kg Spritzgießvorrichtung zur Herstellung von Rohren mit hinterschnittener Innengeometrie, vorzugsweise mit Innengewinde sowie Verfahren zur Herstellung von Rohren mit hinterschnittener Innengeometrie, vorzugsweise mit Innengewinde durch Spritzgießen
DE102017123566A1 (de) * 2016-10-10 2018-04-12 Grammer Ag Getriebe sowie Kopfstütze mit wenigstens einem elektrischen Antrieb, umfassend ein Getriebe
DE102018116216A1 (de) 2018-07-04 2020-01-09 Desoi Gmbh Vorrichtung zum Entspindeln von Innengewinden in Spritzgussteilen mit Hilfe eines elektrisch gesteuerten Antriebs

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Publication number Publication date
DE102020122372B3 (de) 2022-01-13
CN115989101A (zh) 2023-04-18
EP4204718A1 (fr) 2023-07-05

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