WO2016151366A1 - Presse à injection électrique rotative ou à carrousel - Google Patents

Presse à injection électrique rotative ou à carrousel Download PDF

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Publication number
WO2016151366A1
WO2016151366A1 PCT/IB2015/052397 IB2015052397W WO2016151366A1 WO 2016151366 A1 WO2016151366 A1 WO 2016151366A1 IB 2015052397 W IB2015052397 W IB 2015052397W WO 2016151366 A1 WO2016151366 A1 WO 2016151366A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
suited
mould
plasticization
injection
Prior art date
Application number
PCT/IB2015/052397
Other languages
English (en)
Inventor
Giorgio PIOVAN
Original Assignee
Piovan Giorgio
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 Piovan Giorgio filed Critical Piovan Giorgio
Publication of WO2016151366A1 publication Critical patent/WO2016151366A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F01K23/101—Regulating means specially adapted therefor
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/10—Footwear characterised by the material made of rubber
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/04—Plastics, rubber or vulcanised fibre
    • 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
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/06—Injection moulding apparatus using movable moulds or mould halves mounted on a turntable, i.e. on a rotating support having a rotating axis parallel to the mould opening, closing or clamping direction
    • 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
    • B29C45/1775—Connecting parts, e.g. injection screws, ejectors, to 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
    • B29C45/64—Mould opening, closing or clamping devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/122—Soles
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D2200/00—Machines or methods characterised by special features
    • A43D2200/20—Machines including a carousel with different working posts around a turning table
    • 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
    • B29C45/1761—Means for guiding movable mould supports or injection units on the machine base or frame; Machine bases or frames
    • B29C2045/1768—Means for guiding movable mould supports or injection units on the machine base or frame; Machine bases or frames constructions of C-shaped frame elements
    • 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
    • B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
    • B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/5008—Drive means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/0009—Producing footwear by injection moulding; Apparatus therefor

Definitions

  • the present patent concerns injection presses for moulding plastic materials, of the rotary or carousel type, and in particular it concerns a new type of rotary or carousel electric injection press specifically suited to process plastic materials.
  • Injection presses for moulding plastic materials are known which are generally equipped with several moulds and are suited to produce thermoplastic items with a given thickness.
  • This type of machines is normally used to produce footwear soles, PVC or rubber or polyurethane boots, plastic modular floors, etc. in addition to cohered items with inserts of various kinds, for example made from metallic materials, leather, fabric, etc.
  • the moulds used in this type of industrial machines are generally positioned horizontally and within the operator's reach, so that the operations necessary to introduce the inserts are easier and quicker.
  • These machines usually comprise at least one unit suited to feed and inject the plastic material, in turn comprising at least one point for loading the plastic material to be injected and at least one feeding worm screw.
  • the row material meaning the plastic material in granules, is melted in a cylindrical horizontal container at a temperature of approximately 160° C, and the plasticization screw, operated by a hydraulic motor, amalgamates and proportions the melted material in a programmed portion.
  • said screw linearly operated by a hydraulic piston, injects the melted material inside a mould.
  • Said machines generally comprise a plurality of moulds placed on the circumference of a substantially circular rotary structure or carousel.
  • the production sequence comprises the mould clamping step, after which the mould is kept closed under pressure by means of the press unit during the filling/injection step, a cooling step and the successive opening of the moulds.
  • Various operations can be performed between the moment when the moulds for the production of a plastic object are clamped and the moment when they are opened to extract the object produced, for example pre-heating of the moulds, injection of the material, possible further heating of the half moulds at the reticulation or expansion temperature of the plastic material, maintenance of the moulds at the moulding temperature.
  • one or more hydraulic pistons provide for opening the mould, thus allowing the item to be extracted.
  • the machines comprise a double injection unit, a mechanism that rotates part of the mould used to make the sole and an auxiliary press intended to keep said part of the mould under pressure even frontally during filling.
  • the system used is a fluid dynamic system, or more particularly a hydrodynamic system, which for this type of machine is particularly burdensome.
  • the oil needs to be cooled, with further energy waste.
  • the hydrodynamic system furthermore requires routine maintenance operations, such as the weekly cleaning of the filters, the periodical hydraulic oil change (every 5000 hours of operation) with consequent problems regarding the disposal of the latter, as well as costly extraordinary maintenance operations, such as the replacement of seals, hoses, pumps, etc.
  • Some machines are known, in which the hydraulic motor for the rotation of the plasticization screw is replaced by a direct electric gear motor.
  • the machines that are currently used are provided with a press with a structure of the open type, with the consequent poor rigidity of the latter, which makes adjustments difficult during the mould filling step.
  • This problem is present especially in the machines equipped for the production of plastic boots, for example rain boots, as these machines are provided with hydraulic pistons that are mounted on said structure characterized by scarce rigidity.
  • the main object of the present invention is to reduce energy consumption.
  • servomechanisms that are described and claimed here below and that are suitable for performing repetitive movements, in addition to ensuring smooth and linear cycles also increase productivity, since they are mostly synchronised mechanically, with no need for complicated electric control circuits and sequences.
  • the new press comprises at least one rotary structure configured as a mould carrier carousel, at least one press structure with a pressing system for clamping said mould carriers under pressure, and at least one injection unit, and wherein the moving members of said press are operated electrically.
  • the new press comprises an injection unit with at least one plasticization screw and at least one plasticization cylinder, wherein the motion of said plasticization screw is power assisted by at least one electric motor.
  • said rotary structure is set rotating by means of at least one electric motor.
  • Said pressing system comprises units with servomechanisms suited to transmit a clamping force to said mould carriers.
  • Figure 1 shows a three-dimensional view of the injection unit (1).
  • Figure 2 shows a three-dimensional view of part of the mould carrier carousel (2).
  • Figure 3 shows a three-dimensional view of the press structure (3).
  • Figure 4 shows a schematic view of the pressing system (4) of the press.
  • Figure 5 shows an overall side view of the new press (P), while Figure 6 shows the double injection system (5).
  • the new press (P) comprises at least one rotary structure configured as a mould carrier carousel (2), at least one press structure (3) provided with a pressing system (4) for clamping said mould carriers (6) under pressure, and at least one injection unit (1).
  • the injection unit (1) comprises a loading hopper (11) suited to load the plastic material, at least one plasticization cylinder (13) in which said plastic material is introduced and at least one plasticization screw (12) suited to rotate axially and to translate axially inside said plasticization cylinder (13) in order to push the plastic material during the injection step. Both the rotation of said plasticization screw (12) and the linear injection movement of said plasticization screw (12) are transmitted by a single main electric motor (14) with two shafts (141, 142).
  • Said main electric motor (14) is preferably controlled by at least one inverter in order to ensure that it is possible to slow down, brake, etc.
  • Each one of said shafts (141, 142) is mechanically connected to said plasticization screw (12) through one or more pulleys (151, 152) or transmission means (161, 162) and through at least one freewheel (171, 172) that makes it possible to transmit the rotary motion of said shafts (141, 142), alternated in the two opposite directions, to said plasticization screw (12).
  • Said injection unit (1) also comprises at least one auxiliary electric motor (19), mechanically connected (191) to said mechanical jack (18) and suited to make said mechanical jack (18) move gradually backwards during the rotation of the plasticization screw (12), thus generating a counterpressure on the melted plastic material, in order to improve the plasticization process and allow a given quantity of the material to be prepared for the successive injection cycle.
  • auxiliary electric motor (19) mechanically connected (191) to said mechanical jack (18) and suited to make said mechanical jack (18) move gradually backwards during the rotation of the plasticization screw (12), thus generating a counterpressure on the melted plastic material, in order to improve the plasticization process and allow a given quantity of the material to be prepared for the successive injection cycle.
  • Said mould carrier carousel (2) comprises a revolving structure (21) that revolves around a substantially vertical axis (Z), with supporting means (33) suited to support one or more mould carriers (6) distributed on a circumference, each mould carrier (6) being provided with a base (61) and an opening cover (62).
  • said structure (21) comprises at least one electric motor, preferably a gear motor, preferably of the epicyclic type (22), suited to transmit the sequential rotation, by means of gears, to at least one main wheel or bearing ring (23), preferably provided with inner toothing/base bearing intended to support also the entire structure (21) of the carousel (2) itself.
  • said mould carrier cover (62) is opened in the station intended for the extraction of the items.
  • said at least one cam (24) guides the descent, meaning the clamping movement, of said mould carrier cover (62) and due to gravity it compensates, as a swing, for part of the force necessary for the following opening movement, thus reducing the load on the gear motor (22).
  • Said structure (21) comprises one or more stop elements (25) for the correct positioning of said mould carriers (6) in the different steps of the sequence.
  • the precision of the alignment of the mould carriers (6) is ensured through the elimination of the clearances, which is achieved by means of at least one pneumatic brake (26) that counteracts the inertia and intervenes a few centimetres before said stop elements (25).
  • the structure (21) preferably comprises at least one preferably toothed second bearing ring (27) that is power assisted by a corresponding motor, preferably a gear motor (28), and wherein said second bearing ring (27) houses said at least one cam (24) for opening/closing said cover (62) of said mould carrier (6).
  • Said second bearing ring (27) makes it possible to move said cam (24) step-by- step with the carousel at a standstill in order to allow the manual mould change manoeuvre to be performed.
  • Said press structure (3) comprises a frame (31), preferably of the type with double “swan neck", that is, substantially in the shape of a double C, wherein the ends (311) of said "C" shapes are connected to each other through at least one tie rod (32) that guarantees sufficient rigidity of the press structure (3), in particular in the area where pressure is exerted on the moulds.
  • Said at least one tie rod (32), supported by one or more thrust bearings (36), is substantially integral with said structure (21) of said mould carrier carousel (2), thus forming its rotary shaft, and is connected to at least one rotary joint (34).
  • Said tie rod (32) is substantially constituted by at least one duct provided with one or more intercepting holes (35), which thus also serves as a manifold to supply the moulds with cooling water, compressed air, electricity, with no need to exclude the possibility of hydraulic connections, as the problems of structural rigidity have been solved.
  • the pressing system (4) illustrated herein is articulated in such a way that it closes horizontally (A), that is, it acts on the cover (62) and on the base (61) of the mould carrier (6), and in such a way that the moulds close frontally (B), that is, it acts with a front pressing element (43) on the front portion (63) of said mould carriers (6).
  • the horizontal (A) and frontal (B) clamping step is particularly necessary for the production of rain boots.
  • Said horizontal clamping step (A) is ensured by means of said pressing system (4) comprising a lower unit (41) that acts on said base (61) of the mould carrier (6) and an upper unit (42) that acts on said cover (62) of the mould carrier (6).
  • Said lower unit (41) in turn comprises a lever mechanism (411) with an inclined plane (412) suited to rest from below on the underside of a corresponding inclined plane (611) integral with said base (61) of said mould carrier (6).
  • Said lever mechanism (41 1) is operated by a servomechanism (413) provided with a cam (414), preferably operated through a pneumatic clutch (415).
  • Said cam (414) is preferably connected to at least one flywheel (417).
  • Said servomechanism (413) is connected to said lever mechanism (411) through at least one connecting rod (416), preferably provided with at least one shock absorber, preferably a continuous safety nitrogen shock absorber.
  • Said lower unit (41) is such that a rotation of said cam (414) by a given angle causes said inclined plane (412) of said lever mechanism (411) to be lifted, wherein said inclined plane (412), acting on said base (61) of said mould holder (6), performs the horizontal clamping operation.
  • Said lower unit (41) is also mechanically connected to said front pressing element (43).
  • Said lever mechanism (411) of said lower unit (41) preferably comprises also at least one compensation element or pad (418) in a semi compressible material such as Vulkollan or another material, so as to ensure that the clamping movement is performed also in the presence of small differences in the thickness of the moulds.
  • Said upper unit (42) comprises at least one servomechanism provided with a cam (421), with a plane (422) that substantially serves as a counteracting plane for said cover (62) of said mould carrier (6).
  • Said upper unit (42) is mechanically connected to said front pressing element (43).
  • the front clamping operation (B) is completed also by moving the upper portion of the front pressing element (43) so that it approaches the cover (62), wherein said front pressing element (43) is tensioned through the 180° rotation of said servomechanism (421) with cam.
  • the whole system is opened through the simultaneous rotation of said servomechanisms (413, 421) of said lower unit (41) and upper unit (42). For example, through a further 180° rotation, the system is brought back to the position in which it is ready for the successive cycle.
  • the injection unit (1) is double, that is, it comprises at least one pair of plasticization cylinders (131, 132), one for the plasticization of the legs (131) and one for the plasticization of the sole (132), each one of said plasticization cylinders (131,
  • the injection unit (1) is moved near the mould carrier (6), by means of one or preferably one pair of preferably parallel mechanical jacks (8), for example with trapeze screw, and preferably assisted by at least one gear motor with negative mechanical brake, which ensures the positioning and the mechanical locking of the entire unit (1).
  • Said approaching movement brings said melted material inlet nozzles (71, 72) at a few centimetres from the corresponding receiving holes (631, 632) made in said front portion (63) of said mould carrier (6).
  • said nozzles (71, 72) are telescopic in order to allow said cycle of approach to and pressure contact with said front portion (63) of said mould carrier (6) to be performed, thus maintaining the entire unit (1) in a fixed and stable position.
  • Each one of said telescopic nozzles (71, 72) comprises at least one cam mechanism (73, 74) suited to generate said motion following which said nozzles (71, 72) are moved near said receiving holes (631, 632).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne une presse (P) à injection électrique rotative ou à carrousel particulièrement appropriée pour traiter des matériaux plastiques, comprenant au moins une structure rotative conçue sous la forme d'un carrousel (2) de support de moule pourvu d'un ou plusieurs supports de moule (6), au moins une structure de presse (3) présentant au moins un système de pressage (4) pour fixer lesdits supports de moule (6) sous pression et au moins une unité d'injection (1) appropriée pour injecter un matériau plastique à l'intérieur desdits moules et tous les éléments mobiles, ou une partie de ceux-ci, de ladite presse étant alimentés électriquement.
PCT/IB2015/052397 2015-03-20 2015-04-01 Presse à injection électrique rotative ou à carrousel WO2016151366A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102015000009367 2015-03-20
ITUB20150091 2015-03-20

Publications (1)

Publication Number Publication Date
WO2016151366A1 true WO2016151366A1 (fr) 2016-09-29

Family

ID=53539839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2015/052397 WO2016151366A1 (fr) 2015-03-20 2015-04-01 Presse à injection électrique rotative ou à carrousel

Country Status (1)

Country Link
WO (1) WO2016151366A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024060770A1 (fr) * 2022-09-23 2024-03-28 苏州锦珂塑胶科技有限公司 Machine de moulage par injection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1479040A1 (de) * 1963-10-28 1969-02-06 C I C Engineering Ltd Verfahren zurm Verformen von Gegenstaenden und Einrichtung zur Durchfuehrung des Verfahrens
WO1997018938A1 (fr) * 1995-11-17 1997-05-29 Cincinnati Milacron Inc. Appareil d'entrainement pour dispositif d'injection
US6024558A (en) * 1998-05-04 2000-02-15 Husky Injection Molding Systems Ltd. Frameless electric drive for turret machine
WO2007036973A1 (fr) * 2005-09-30 2007-04-05 G.G.S. Sas Di Gobbato Franco & C. Structure de support rotative pour jeux de moules

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1479040A1 (de) * 1963-10-28 1969-02-06 C I C Engineering Ltd Verfahren zurm Verformen von Gegenstaenden und Einrichtung zur Durchfuehrung des Verfahrens
WO1997018938A1 (fr) * 1995-11-17 1997-05-29 Cincinnati Milacron Inc. Appareil d'entrainement pour dispositif d'injection
US6024558A (en) * 1998-05-04 2000-02-15 Husky Injection Molding Systems Ltd. Frameless electric drive for turret machine
WO2007036973A1 (fr) * 2005-09-30 2007-04-05 G.G.S. Sas Di Gobbato Franco & C. Structure de support rotative pour jeux de moules

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YAO-DE WANG ET AL: "Design and fabrication of an all-electric tiebarless injection molding machine", MECHATRONICS, 2005. ICM '05. IEEE INTERNATIONAL CONFERENCE ON TAIPEI, TAIWAN 10-12 JULY 2005, PISCATAWAY, NJ, USA,IEEE, US, 10 July 2005 (2005-07-10), pages 783 - 787, XP010850399, ISBN: 978-0-7803-8998-4, DOI: 10.1109/ICMECH.2005.1529361 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024060770A1 (fr) * 2022-09-23 2024-03-28 苏州锦珂塑胶科技有限公司 Machine de moulage par injection

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