WO2018055650A1 - Machine de type carrousel destinée à la fabrication de pièces moulées par injection comprenant deux matériaux et procédé de fabrication associé - Google Patents

Machine de type carrousel destinée à la fabrication de pièces moulées par injection comprenant deux matériaux et procédé de fabrication associé Download PDF

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Publication number
WO2018055650A1
WO2018055650A1 PCT/IT2017/000184 IT2017000184W WO2018055650A1 WO 2018055650 A1 WO2018055650 A1 WO 2018055650A1 IT 2017000184 W IT2017000184 W IT 2017000184W WO 2018055650 A1 WO2018055650 A1 WO 2018055650A1
Authority
WO
WIPO (PCT)
Prior art keywords
carousel
mold
tread
sole
midsole
Prior art date
Application number
PCT/IT2017/000184
Other languages
English (en)
Inventor
Alfonso MOTTO
Original Assignee
Wintech S.R.L.
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 Wintech S.R.L. filed Critical Wintech S.R.L.
Publication of WO2018055650A1 publication Critical patent/WO2018055650A1/fr

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Classifications

    • 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
    • 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
    • B29D35/0018—Moulds
    • 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
    • B29D35/02—Producing footwear made in one piece using a moulding technique, e.g. by injection moulding or casting
    • B29D35/04—Producing footwear made in one piece using a moulding technique, e.g. by injection moulding or casting having multilayered parts
    • 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
    • B29D35/14—Multilayered parts
    • B29D35/142—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

Definitions

  • the present invention refers to a machine, of the carousel type, for making injection molded pieces comprising two different materials, in particular for producing soles for footwear, and to a particular production method, suitable to allow cooling the molded piece, before its extraction from the mold.
  • Shoe soles above all in sports shoes, are often made with two plastic materials having different mechanical features.
  • the tread is made with a first material, more resistant to wear, while the midsole is made with a second, elastically yielding, material, the midsole being the layer which is placed between tread and upper.
  • the two materials are also of different colors, to obtain particular chromatic effects, according to the known art .
  • a rotary mold is used with two imprints and a matrix.
  • a recess is obtained, within which the material for making the tread is injected.
  • the mold is opened and is rotated to insert the second imprint into the same matrix, wherein the newly injected tread is present.
  • a second recess is obtained, above the tread, wherein the material for making the midsole is injected.
  • This production method is performed both with dynamic machines, of the carousel type, and with static machines. In both cases, the production method is determined by its cooling times: due to this, the carousel machines with a high number of stations obtain a greater production with respect to static machines.
  • these machines are scarcely flexible, costly, cumbersome, of a difficult handling and not suitable for limited productions. In fact, they are capable of producing with competitive costs only if used with their maximum potentialities, thing that is not often possible, especially during periods of crisis.
  • the present invention proposes a method, and a machine for performing such method, respectively according to claims 1 and 4, for making injection molded pieces comprising two different materials, in particular for producing soles for footwear comprising a tread and a midsole .
  • Such method performs the production on machines of the carousel type, where said first and second material are injected in the same, suitably configured mold, wherein the production of soles is performed in three revolutions of the carousel, according to the following modes :
  • Another important feature of the method of the invention is that the sole is kept in the mold for two revolutions after injecting the midsole, in order da complete the solidification, and that, in part of the path, the mold is open.
  • the machine for producing these soles for footwear comprising a tread and a midsole, is of the type equipped with:
  • said carousel being programmed to take in a sequence the mold next to :
  • said mold being of the type comprising a first and a second imprint which, by being inserted in succession into a matrix, locate recesses wherein the sole tread and midsole must be injected, and the carousel comprises three stations wherein: • the first and second injector are next to the first station;
  • the machine being programmed to perform the production of the soles in compliance with the previously described method.
  • the use of the machine and of the method in compliance with the invention allows removing the inactive steps, though keeping the advantages of a small - sized machine, such as reduced costs and overall sizes and easy production management, and allows obtaining a quick production method comparable with a carousel with a number of stations which is three times bigger.
  • figure 1 is a perspective view of a machine of the invention
  • figure 2 shows a diagram of the machine of the invention
  • Fig. 1 shows a machine (1) for molding two-color soles, suitable to perform the production method of the invention.
  • this machine (1) comprises a carousel (2) with three stations (2a, 2b, 2c) , each one of which is occupied by a mold base (3) for molding the soles .
  • an injecting apparatus (4) comprising a pair of injectors (4a, 4b) and a press (5) , for example of the type which comprises a portal (5a) and an hydraulic cylinder (5b) .
  • the carousel (2) is rotatable with respect to a vertical axis and the mold base (3) pass, in a sequence, from the first station (2a) , to the second station (2b) and, finally to the third station (2c) , to then repeat the same movements.
  • Fig. 2 schematically shows the injecting apparatus (4) , arranged next to the first station (2a) .
  • the injecting apparatus (4) comprises the pair of injectors (4a, 4b), schematically shown through two arrows.
  • a first injector (4a) has the function of injecting the material composing the external part of the sole, namely the tread, while a second injector (4b) has the function of injecting the material composing the midsole.
  • Figures 3, 4, 5 and 6 show the mold base (3), on which a mold (6) is assembled for molding the soles.
  • the mold base (3) comprises a fixed base (3a) and a mobile element (3b) having the shape of a parallelepiped, assembled on a pair of actuators (7) , in order to be able to rotate around an axis "x" , which, when the mold base (3) is in the first station (2a) , is horizontal and laying on a plane perpendicular to the axis of the injectors (4a, 4b) .
  • the mold (6) comprises a first imprint (6a) and a second imprint (6b) , assembled on two contiguous faces of the parallelepiped (3b) , while a matrix (6c) remains fixed on the base (3a) of said mold base (3) , the matrix (6c) , in a sequence, being applied to the first and second imprint (6a, 6b) , according to the modes described below.
  • the opening of the mold (6) , and its following closure, are performed through the action of the actuators (7) .
  • the mold base (3) is in the first station (2a) , it is subjected to the action of the hydraulic cylinder (5b), shown in Fig. 1, which keeps the mold (6) closed during the injection.
  • the method of the invention is always performed during three revolutions of the carousel (2) . After having started the cycle, only two revolutions will then be necessary to extract a pair of finished soles.
  • Figures 7, 8 and 9 show the operations respectively performed in the first, in the second and in the third revolution of the carousel (2) .
  • the first imprint (6a) of the mold (6) is inserted into the matrix (6c), like in Fig. 3: the first injector (4a) injects the material for forming the tread of a first sole.
  • the mold remains closed and the cooling of the tread starts.
  • the mold (6) is opened, the mold base (3) rotates and takes the second imprint (6b) inside the matrix (6c) , being arranged for injecting the midsole, like in Figures 4 and 5.
  • the second injector (4b) injects the material composing the midsole.
  • the mold remains closed and the cooling of the first complete sole starts.
  • the mold (6) is opened, the mold base (3) rotates and takes the first imprint (6a) inside the matrix (6c) , being arranged for injecting the tread of a second sole, while the first complete sole remains on the second imprint (6b), where the cooling continues.
  • the first injector (4a) injects the material for forming the tread of the second sole, while the first previous complete sole remains on the second imprint (6b), where the cooling continues.
  • the mold remains closed and the cooling of the tread of the second sole starts, while the previous complete sole remains on the second imprint (6b) , where it completes its cooling.
  • the first sole (10) having completed its cooling, is extracted from the second imprint (6b) , then the mold (6) opens, the mold base (3) rotates and takes the imprint (6b) inside the matrix (6c) for the following injection of the midsole of the second sole, by the second injector (4b) , in the first station (2a) .
  • every step of the method is active, so that the machine productivity is rather high and is about 30% higher than that of static machines, wherein it is necessary to wait, with an inactive machine, for the necessary time for cooling the molded piece.
  • the sole (10) is made remain in the machine (1) for two complete revolutions before its extraction from the mold (6) , thereby obtaining the same solidification, as in big-sized machines.
  • the only difference is that the cooling of the complete sole (10) occurs in a closed mold only in the second station (2b) and immediately after the injection of the midsole, by the second injector (4b) .
  • the mold (6) is opened and the sole (10) completes its solidification with open mold, namely on the second imprint (6b), on which it remains for a second revolution, till it goes back again to the third station (2c) , where it is extracted by the operator.
  • open mold namely on the second imprint (6b)
  • the adhesion to the second imprint (6b) is anyway enough to keep shape and sizes of the sole (10) stable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication de pièces moulées par injection comprenant deux matériaux différents pour produire des semelles (10) pour des chaussures à lamelle et semelle intercalaire, le premier et le deuxième matériau étant injectés dans un même moule (6) comprenant une première empreinte (6a) et une deuxième empreinte (6b) qui, en étant insérés successivement dans une matrice (6c), positionnent des évidements dans lesquels sont injectés la lamelle et la semelle intercalaire, la production étant effectuée sur des machines de type carrousel (2), le carrousel (2) comprenant trois stations (2a, 2b, 2c) ; la production des semelles (10) est réalisée en trois tours du carrousel (2) selon les modes suivants : au premier tour, la lamelle est extraite dans la première station (2a) ; au deuxième tour, la semelle intercalaire est injectée dans la première station (2a) ; au troisième tour, la semelle complète (10) est injectée dans la troisième station (2c) et la lamelle de la semelle suivante (10) est injectée ; afin de produire une semelle complète (10) tous les deux tours du carrousel (2).
PCT/IT2017/000184 2016-09-01 2017-08-30 Machine de type carrousel destinée à la fabrication de pièces moulées par injection comprenant deux matériaux et procédé de fabrication associé WO2018055650A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000088724A IT201600088724A1 (it) 2016-09-01 2016-09-01 Macchina a giostra per la realizzazione di pezzi stampati ad iniezione comprendenti due materiali e relativo ciclo di produzione
IT102016000088724 2016-09-01

Publications (1)

Publication Number Publication Date
WO2018055650A1 true WO2018055650A1 (fr) 2018-03-29

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PCT/IT2017/000184 WO2018055650A1 (fr) 2016-09-01 2017-08-30 Machine de type carrousel destinée à la fabrication de pièces moulées par injection comprenant deux matériaux et procédé de fabrication associé

Country Status (2)

Country Link
IT (1) IT201600088724A1 (fr)
WO (1) WO2018055650A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022047818A1 (fr) * 2020-09-03 2022-03-10 夏丽芬 Appareil de fabrication de semelle à double couche
DE102022109224A1 (de) 2022-04-14 2023-10-19 Birkenstock Ip Gmbh Verfahren zur Herstellung eines Unterbaus für Schuhwaren, Schuhware und Maschine zur Herstellung eines Unterbaus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197245A (en) * 1986-11-05 1988-05-18 Kloeckner Ferromatik Desma Moulding stations for moulding shoe soles
US20120056345A1 (en) * 2009-05-14 2012-03-08 Lee Dong-Gun Polyurethane-coated spandex fabric-fused midsole and apparatus and method for manufacturing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197245A (en) * 1986-11-05 1988-05-18 Kloeckner Ferromatik Desma Moulding stations for moulding shoe soles
US20120056345A1 (en) * 2009-05-14 2012-03-08 Lee Dong-Gun Polyurethane-coated spandex fabric-fused midsole and apparatus and method for manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022047818A1 (fr) * 2020-09-03 2022-03-10 夏丽芬 Appareil de fabrication de semelle à double couche
DE102022109224A1 (de) 2022-04-14 2023-10-19 Birkenstock Ip Gmbh Verfahren zur Herstellung eines Unterbaus für Schuhwaren, Schuhware und Maschine zur Herstellung eines Unterbaus

Also Published As

Publication number Publication date
IT201600088724A1 (it) 2016-12-01

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