EP3969236A1 - Device and method for cutting a plastic profiled element to length - Google Patents
Device and method for cutting a plastic profiled element to lengthInfo
- Publication number
- EP3969236A1 EP3969236A1 EP21748865.9A EP21748865A EP3969236A1 EP 3969236 A1 EP3969236 A1 EP 3969236A1 EP 21748865 A EP21748865 A EP 21748865A EP 3969236 A1 EP3969236 A1 EP 3969236A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- separating
- tool
- bead
- plastic product
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 60
- 239000004033 plastic Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003000 extruded plastic Substances 0.000 claims abstract description 4
- 239000011324 bead Substances 0.000 claims description 42
- 238000001125 extrusion Methods 0.000 claims description 28
- 238000000605 extraction Methods 0.000 claims description 12
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/16—Cutting rods or tubes transversely
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/18—Machines with circular saw blades for sawing stock while the latter is travelling otherwise than in the direction of the cut
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
- B26D1/60—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter and is mounted on a movable carriage
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/355—Conveyors for extruded articles
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D2007/013—Means for holding or positioning work the work being tubes, rods or logs
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0027—Cutting off
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- the invention relates to a device for separating plastic products, in particular extruded plastic pipes, comprising at least one first extraction device with at least two extraction caterpillars, a separating unit which comprises at least one separating device with at least one separating means, by means of which plastic products can be separated to a predetermined length, and a related device Proceedings.
- So-called flying saws are usually used to cut extruded pipes to length, whereby a circular saw blade is brought up to the pipe to be cut either from below (underfloor saw), from above (plunge saw) or from the side (crosscut saw), dips into the cross-section of the pipe and cuts cut through the wall thickness in the first step.
- the saw blade is guided around the pipe to cut the pipe completely to length.
- the pipe to be cut to length is clamped during the sawing process; the saw carriage or saw carriage then moves synchronously with the continuously running extrusion process at the extrusion speed (“flying saw”).
- DE 102013220622A1 describes a device for cutting a thick-walled extruded pipe to length, with at least one cutting tool and a receiving unit for the cutting tool, the cutting tool being movable radially to the extrusion axis and using other means the pipe to be cut to length can be rotated around it in order to cut the pipe to length
- the receiving unit comprises two toothed racks arranged in a block, the first toothed rack being movable back and forth parallel and the second toothed rack radially to the extrusion axis and on the second toothed rack
- the Separating tool is arranged and the ring element can be moved via an axial drive and the penetration depth of the separating tool and the travel path can be determined by means of an adjustment unit and the receiving unit is connected to a receiving disc and a sleeve, with linear guides on the sleeve elements are arranged parallel to the extrusion axis, with at least four linear
- the object of the invention is to further develop the known devices and methods in such a way that it is no longer necessary to move the separating device, so that they can work more effectively and energy is saved, and the systems can therefore be operated in a more environmentally friendly manner.
- the cutting unit comprises at least one bead with at least one cutting tool, with at least one tool being arranged on one of the beads, with at least one in the tool Separating agent is arranged by means of which the plastic products can be separated.
- the separating means are advantageously arranged inside the tool and can be rotated around the plastic product to be separated during the separating process. As a result, the separating process can be completed more quickly than if the separating agent had to run through the entire cross section of the plastic product.
- the tool is designed in such a way that it encloses the plastic product to be separated in a U-shape during the separation process.
- This U-shaped enclosing has the advantage that the parting agent not only engages in the plastic product at one point, but that several parting agents can carry out the parting process at the same time distributed at several points around the circumference.
- the cutting tool can be moved with the bead at its speed. This means that the cutting tool is firmly connected to the bead. As a result, the cutting process can be completed at take-off speed.
- Another bead advantageously supports the plastic product during the cutting process. This means that during the cutting process, it is transverse to the direction of extrusion, ie radially applied separating force is counteracted, whereby excessive sagging or bending of the plastic product is avoided, which in turn contributes to improving the course of the cut on the plastic product.
- the plastic product is preferably fixed radially by means of the beads.
- the cutting process takes place in a time window in which the cutting tool arranged on the bead is in contact with the plastic product, the time window being defined by the length of the contact surface of the bead with the plastic product.
- the axial length of the bead in conjunction with the take-off speed, therefore determines the time window in which the cutting process must be completed. Since the separating tool is moved at the take-off speed with the bead, the separating tool is brought out of contact with the plastic product as soon as the separating tool leaves the contact area between the bead and the surface of the plastic product.
- Figure 1 shows a typical extrusion line
- FIG. 3 is an enlargement of Figure 2
- Fig. 5 is an addition to Figure 2
- Fig. 6 is an addition to Fig. 4
- Figure 1 shows a typical extrusion line as it is used today for profile extrusion, whether for the production of window profiles or pipes. It shows an extruder 1 in which plastic is melted and is continuously fed into the extrusion die 2 for shaping. This is followed by a calibration and cooling station 3, further cooling stations can be used depending on the profile. After the cooling stations, a first extraction unit 4 follows. In order to cut the endless profiles 7 to the desired length, a separating device 5 is then arranged. This is followed by a further extraction unit 6. The extrusion axis is marked with the position number 8.
- FIG. 2 shows the parts of the device that are involved in the separation process.
- the first extraction unit 4 includes two extraction caterpillars 12, but several caterpillars can also be arranged in one extraction unit, which extract the plastic product 7 from the calibration and cooling tank 3 and convey the separating unit 10 in the extrusion direction Hin.
- the separating unit 10 consists of a bead 14 on which the separating tools 13 are arranged. During the separating process, one separating tool 13 encompasses the plastic product 7 and carries out the separating process, while the plastic product 7 continues to be conveyed through the separating unit 10 . After the cutting process, the cutting tool 13 is disengaged.
- separating tool 13 can carry out the next separating process.
- Another bead 16 is provided to support the plastic product 7 during the cutting process. The separating process is completed before the separating tool 13, which is arranged on the bead 14, leaves the contact surface between the bead 14 and the plastic product 7 again. This contact length 17 is reproduced purely schematically.
- FIG. 3 shows an enlargement of FIG. 2, in which the bead 14 with a separating tool 13 can be seen.
- the separating tool 13 comprises a separating means 15 rotating around the plastic product 7, which is symbolized by the arrow.
- the separating tool 13 runs in the extrusion direction 11 at the extrusion speed v.
- the separating means 15 does not necessarily have to rotate around the plastic product 7; the separating can also be done by simply pressing it into the soft plastic mass or by clamping it with a saw.
- FIG. 4 shows a section through the separating unit 10 transversely to the extrusion axis 8.
- the plastic product 7 is supported, conveyed and cut to length by means of three caterpillars.
- Separating tools 13 are arranged on the caterpillar 14 and run at the same speed as the caterpillar 14 .
- Two further caterpillars 16 are provided both for supporting and for transporting the plastic product 7 .
- FIG. 5 corresponds to FIG. 2 with the same reference numerals.
- FIG. 5 differs only in that a double arrow is shown on bead 16 and bead 14, which is intended to show schematically that bead 16 and bead 14 can be moved toward or away from the center point of the pipe and thus extrusion axis 8 . This makes it possible to adjust the device to different pipe diameters. This is additionally illustrated in FIG.
- FIG. 6 corresponds to FIG. 4 and also has the same reference numerals.
- the beads 14 and 16 were each provided with a double arrow to indicate the possible movement of the beads to the center of the extruded tube.
- a smaller diameter tube was shown as a knitted dotted line.
- the caterpillar 14 with the separating tools 13 can also act as a support.
- rollers 18 are arranged on the caterpillar 14, as shown schematically in FIG. 2, so that both support and unrestricted transport of the plastic product 7 are ensured. Otherwise the caterpillar 14 could jam at different speeds. In this way, rolling on the plastic product 7 is ensured at all times.
- the machine control can regulate the speed depending on the cutting length required, as well as the number of cutting tools 13 on the bead 14 and the length of the contact surface 17.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020120831.6A DE102020120831A1 (en) | 2020-08-06 | 2020-08-06 | Device and method for cutting a plastic profile to length |
DE102020120830.8A DE102020120830A1 (en) | 2020-08-06 | 2020-08-06 | Device and method for cutting a plastic profile to length |
PCT/EP2021/070571 WO2022028911A1 (en) | 2020-08-06 | 2021-07-21 | Device and method for cutting a plastic profiled element to length |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3969236A1 true EP3969236A1 (en) | 2022-03-23 |
Family
ID=77155791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21748865.9A Pending EP3969236A1 (en) | 2020-08-06 | 2021-07-21 | Device and method for cutting a plastic profiled element to length |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3969236A1 (en) |
CN (1) | CN114302798B (en) |
WO (1) | WO2022028911A1 (en) |
Family Cites Families (28)
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US3771393A (en) * | 1971-06-23 | 1973-11-13 | Charles Gatto | Cutting apparatus and method therefor |
JPS51149369A (en) * | 1975-06-17 | 1976-12-22 | Kubota Ltd | Device for producing plastic pipe having thick portion at one end |
JPH0711853Y2 (en) * | 1988-10-25 | 1995-03-22 | 日東工器株式会社 | Pipe cutter |
JP2811428B2 (en) * | 1995-08-24 | 1998-10-15 | 株式会社大矢根利器製作所 | Circle cutter |
DE19754199C1 (en) * | 1997-12-06 | 1999-06-24 | Knieriem Guenther Dipl Ing Fh | Device for producing filled, sealed tubular bag packs |
CN2332521Y (en) * | 1998-07-08 | 1999-08-11 | 李志伟 | Internally-cutting notching machine for thin-wall tube |
DE29905210U1 (en) * | 1999-03-22 | 1999-06-10 | Battenfeld Extrusionstechnik Gmbh, 32547 Bad Oeynhausen | Extraction device for an extruder |
CN1191964C (en) * | 2001-06-11 | 2005-03-09 | 诚泰工业科技股份有限公司 | Method for packing hot-fusible adhesive |
AT414344B8 (en) * | 2002-10-25 | 2013-03-15 | Technoplast Kunststofftechnik | METHOD FOR PRODUCING PLASTIC PROFILES |
US7918152B2 (en) * | 2008-05-21 | 2011-04-05 | TANG Yi-lin | Electric cling film cutter |
CN202016087U (en) * | 2011-02-16 | 2011-10-26 | 李勇 | Cutting device for cutting non-metal sheet through crawler belt synchronous transmission |
CN203471816U (en) * | 2013-08-07 | 2014-03-12 | 安徽永高塑业发展有限公司 | Finned tube cutting knife |
DE102013220621B4 (en) * | 2013-10-12 | 2019-03-28 | Battenfeld-Cincinnati Germany Gmbh | Cutting device for extruded plastic profiles |
DE102013220622A1 (en) | 2013-10-12 | 2015-04-16 | Battenfeld-Cincinnati Germany Gmbh | Cutting device and method for energy buffering and fixation for extruded plastic profiles |
CN205148404U (en) * | 2015-11-06 | 2016-04-13 | 东莞市吉田机械有限公司 | Servo pipe cutting machine is cut to high -accuracy chasing after |
IT201600104006A1 (en) * | 2016-10-17 | 2018-04-17 | Sica Spa | METHOD AND CUTTING EQUIPMENT OF A TUBE IN THERMOPLASTIC MATERIAL. |
CN206201054U (en) * | 2016-11-22 | 2017-05-31 | 天津市洁雅特保温材料有限公司 | A kind of extruded sheet length cutter sweep |
CN107359562A (en) * | 2017-09-04 | 2017-11-17 | 南京汉启能源技术有限公司 | The three automatic pre-processing devices of core crosslinked cable joint |
CN108161127A (en) * | 2017-12-22 | 2018-06-15 | 宁波星瑞克中空铝条有限公司 | A kind of hollow glass aluminum strip cutting machine |
CN207942451U (en) * | 2018-01-12 | 2018-10-09 | 东莞市聚力玻纤制品有限公司 | A kind of carbon fiber pipe batch disconnecting device |
CN108789545B (en) * | 2018-05-23 | 2020-10-16 | 苏州德斯米尔智能科技有限公司 | Cutting and discharging device for plastic suction pipe |
JP6685614B2 (en) * | 2018-08-31 | 2020-04-22 | 日本ピストンリング株式会社 | Wire rod molding machine and method for manufacturing wire rod molded product |
CN110140519A (en) * | 2019-06-10 | 2019-08-20 | 华中农业大学 | A kind of novel tea picking machine |
CN210582849U (en) * | 2019-07-13 | 2020-05-22 | 常州柯恒卫生用品有限公司 | Compound machining mechanism is used in adult diaper production |
CN110480719A (en) * | 2019-08-19 | 2019-11-22 | 绍兴龙泽管道有限公司 | A kind of carat of pipe continuous production equipment and technique |
CN110861280A (en) * | 2019-11-24 | 2020-03-06 | 六安丰恺尼机电科技有限公司 | Booster-type plastic pipe fitting forming machine |
CN111438716B (en) * | 2020-04-10 | 2021-07-09 | 周瑞敏 | Special cutting machine for PE pipe production and use method thereof |
CN111483127A (en) * | 2020-05-27 | 2020-08-04 | 珠海市春谷科技有限公司 | Rubber tube extrusion molding device for rubber roller of processing box |
-
2021
- 2021-07-21 CN CN202180004649.9A patent/CN114302798B/en active Active
- 2021-07-21 WO PCT/EP2021/070571 patent/WO2022028911A1/en unknown
- 2021-07-21 EP EP21748865.9A patent/EP3969236A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN114302798B (en) | 2024-03-15 |
WO2022028911A1 (en) | 2022-02-10 |
CN114302798A (en) | 2022-04-08 |
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