WO2009106634A1 - Moule pour dessous de chaussure pourvu d’une structure monolithique avec une rigidité différentiée et dessous obtenu au moyen dudit moule - Google Patents

Moule pour dessous de chaussure pourvu d’une structure monolithique avec une rigidité différentiée et dessous obtenu au moyen dudit moule Download PDF

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Publication number
WO2009106634A1
WO2009106634A1 PCT/EP2009/052413 EP2009052413W WO2009106634A1 WO 2009106634 A1 WO2009106634 A1 WO 2009106634A1 EP 2009052413 W EP2009052413 W EP 2009052413W WO 2009106634 A1 WO2009106634 A1 WO 2009106634A1
Authority
WO
WIPO (PCT)
Prior art keywords
partition
impression
mould
mould according
lateral
Prior art date
Application number
PCT/EP2009/052413
Other languages
English (en)
Inventor
Marino Sagripanti
Original Assignee
Soles.Com 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 Soles.Com S.R.L. filed Critical Soles.Com S.R.L.
Publication of WO2009106634A1 publication Critical patent/WO2009106634A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/14—Soles; Sole-and-heel integral units characterised by the constructive form
    • A43B13/16—Pieced soles
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
    • B29C45/1639—Removable partitions between adjacent mould cavity portions
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/164—The moulding materials being injected simultaneously
    • 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
    • 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
    • B29D35/128—Moulds or apparatus therefor

Definitions

  • Mould for shoe bottom provided with monolithic structure with differentiated rigidity and bottom obtained with said mould.
  • the present patent application for industrial invention relates to a mould for shoe bottom made of plastic materials, provided with monolithic structure with differentiated rigidity and to the bottom obtained with said mould.
  • plastic moulded bottoms are obtained by casting with open mould or by injection with closed mould.
  • the various areas of the shoe bottom should not have the same rigidity level.
  • the heel area should have considerable rigidity to ensure stable support for the user's foot, while the area of the front half plant should have lower rigidity, because it needs to be bent following the normal tendency of the user's foot during walking.
  • the first operation is designed to obtain by moulding a first section of the bottom (either the front or rear section), with a specific rigidity level by using an especially suitable moulding material.
  • the section that has been previously obtained is inserted into a second mould, in which a second material is injected or cast to originate the remaining section of the bottom with different rigidity characteristics.
  • the said criticality refers to the need to use two different successive moulding operations in two different moulds to obtain a bottom with differentiated rigidity.
  • the costs of such a procedure are quite high, in view of the need to have two different moulds, and also in view of the rather long time needed to perform the two aforementioned moulding operations in sequence.
  • the purpose of the present invention is to devise a mould that allows for obtaining a shoe bottom with areas with differentiated rigidity with one single moulding operation.
  • the mould of the invention is internally provided, approximately half way its length, with a transversal vertical partition that forms two separate compartments inside the mould, of which the first one is basically designed to mould the heel area of the bottom and the second one is basically designed to mould the front half plant of the same bottom.
  • the two compartments of such a mould are filled with two plastic materials that settle with different rigidity and flexibility levels; it being provided, in particular, that the rear compartment (that corresponds to the heel area) is filled with a material having higher rigidity and lower flexibility and the front compartment (that corresponds to the half plant area) is filled with a material having lower rigidity and higher flexibility.
  • the function of the transversal partition is to avoid the total uncontrolled mixing of the two moulding materials in fluid state, although leaving the possibility for both materials to permeate partially to ensure structural continuity of the bottom obtained from this mould.
  • the bottom of the invention can be obtained by injection moulding (that is to say: with closed mould), using expanded materials, such as for example: expanded TR, expanded PVC, expanded EVA and similar materials.
  • expanded materials such as for example: expanded TR, expanded PVC, expanded EVA and similar materials.
  • the vertical partition may be indifferently mounted on the bottom of the mould or on the internal side of the lid.
  • the bottom of the invention can be obtained by cast- moulding (that is to say: with open mould), using suitable expanded polyurethane materials.
  • the vertical partition can be simply laid on the bottom of the mould and supported in vertical position by means of suitable fixing pins attached onto the walls of the bottom of the mould.
  • the partition is designed to be incorporated between the two different moulding materials and completely drawn (“concealed") inside the structure of the bottom that is being moulded.
  • the partition is made of sufficiently rigid plastic materials that are suitable to be joined and incorporated between the two castings of plastic materials made from opposite sides with respect to it.
  • the bottom of the invention can be used for different purposes within the traditional footwear manufacturing technique.
  • bottom for shoes in such a case, it will be simply necessary to finish the surface of the lateral sides, possibly by painting, and associate it with a corresponding upper.
  • a perimeter coating either a partial or total one, made of fabric or leather and designed to characterise the general aspect of the bottom obtained with the present invention.
  • FIG. 1 is a cross-sectional view with a vertical longitudinal plane of the mould of the invention, which is filled with the two moulding materials;
  • figure 1 A is the longitudinal cross-sectional view of the bottom extracted from the mould of figure 1 ;
  • FIG. 2 is the same as the figure above, except in that it refers to a second embodiment of the said mould;
  • figure 3 is a cross-sectional view with a transversal plane of the mould of figure 1 ;
  • - figure 4 is a cross-sectional view with a transversal plane of the mould of figure 2;
  • - figure 5 is the same as figure 3, except in that it refers to a third embodiment of the said mould;
  • FIG. 6 is a partial top view of the mould of figure 5, without lid;
  • - figure 7 is a cross-sectional view with a transversal plane of an additional embodiment of the mould of the invention
  • - figure 8 is the same as figure 4, except in that it refers to an embodiment of the said mould provided with a mobile partition designed to descend from up down inside the impression;
  • figure 9 is the same as the figure above, except in that it refers to an embodiment of the said mould provided with a mobile partition without passage sections;
  • figure 10 is the same as figure 3, except in that it refers to an embodiment of the said mould provided with a mobile partition designed to ascend from down up inside the impression;
  • figure 1 1 is the same as the figure above, except in that it refers to an embodiment of the said mould provided with a mobile partition without passage sections.
  • the mould of the invention (1 ) normally with lid (2), is internally provided with a transversal vertical partition (3) situated approximately half way the internal cavity. The presence of the partition (3) forms two separate compartments
  • V1 , V2 inside the impression (4) of the mould (1 ), respectively designed to mould the heel area and the front half plant area of the bottom (10) that is being moulded, and designed to be filled with different plastic materials having different rigidity and flexibility characteristics, once they have settled.
  • V1 is designed to obtain the basically rigid rear section (1 Oa) of the bottom (10), while the moulding material poured in the front compartment (V2) is designed to obtain the basically flexible front section (10b) of the same bottom (10); reference is made to figure 1 A.
  • the two different moulding materials must penetrate mutually inside the mould (1 ) partially, in such a way that the rear and front sections (10a, 10b) of the bottom (10) obtained with them can be joined irreversibly.
  • the partition (3) must not originate the hermetic separation between the two compartments (V1 , V2) provided inside the mould (1 ), and must leave some passage sections between them.
  • the passage sections make the two compartments (V1 , V2) partially intercommunicating and permit limited seeping of the moulding materials in fluid state from one compartment to the other.
  • the said seeping and consequent mutual penetration of the two moulding materials are obtained on the interfaced surfaces of the two sections (10a, 10b) of the bottom (10), that is to say in the areas immediately upstream and downstream the partition (3).
  • the transversal partition (3) protrudes vertically from the bottom of the mould (1 ).
  • SP2 Two additional passages sections are created on the two sides of the partition (3), in intermediate position between each lateral side of the partition and the adjacent lateral wall of the impression (4) of the mould (1 ).
  • the seeping of plastic materials through the upper passage section (SP1 ) and the two lateral passage sections (SP2) gives structural continuity to the upper side and to the lateral sides of the bottom that is being moulded.
  • Additional passage sections (SP3) are also provided in the central area of the partition (3), in order to permit the mutual penetration of the two moulding materials also for the entire thickness of the bottom that is being moulded.
  • the central passage sections (SP3) are obtained by providing the partition (3) with a series of basically vertical notches (5) with up-down direction starting from the upper border of the partition (3).
  • the said notches (5) have a basically V-shaped profile in order to favour the extraction of the settled bottom (10) from the mould (1 ).
  • the partition (3) provided with a similar structure can be applied both in a mould for injection moulding and in a mould for casting moulding.
  • a second embodiment of the partition (30) is applied on the internal side of the lid (2) of the mould used for injection moulding, in such a way that the partition (30) adopts its operational position inside the impression (4), only when the lid is brought in closed position.
  • the partition (30) has a lower height than the impression (4) that contains it, in such a way that the passage section (SP1 ) for the moulding materials is arranged between the lower horizontal border of the partition (30) and the horizontal bottom wall of the impression (4).
  • the notches (50) obtained on the partition (30) must have a basically overturned V-shaped profile.
  • the partitions (3, 30) can be also obtained in sliding gate-like version, suitably associated with corresponding actuators, in such a way to free the impression (4) of the mould (1 ) from their presence; reference is made to figure 10 and figure 8, respectively.
  • the partition (3) that protrudes from the bottom of the mould (1 ) is designed to be removed in up-down direction when necessary; with reference to fig. 8, the partition (30) that protrudes from the inside of the lid (2) is designed to be removed in down-up direction when necessary.
  • the partitions are not provided with passage sections, as shown in figure 1 1 and figure 9.
  • the space freed by the partitions (3, 30) can be immediately filled by the moulding materials that tend to penetrate mutually in this central area.
  • the said gate-like removable partitions have been provided in order to avoid that the impression of the partitions remains on the bottom (10) that has settled inside the mould (1 ), with a sort of vertical cavity between the rear section (10a) and the front section (10b) of the bottom (10).
  • the two partitions (3, 30) can be complementary, meaning that the mould (1 ) can d be simultaneously provided with a partition (3) that protrudes from the bottom of the impression (4) and a partition (30) that is perfectly aligned with the first partition, which protrudes from the lid (2); reference is made to fig. 7.
  • the two partitions (3, 30) in vertical aligned position must have a total height basically equal to the impression (4).
  • Figures 5 and 6 refer to an additional embodiment of the partition (300), which is expressly designed to be incorporated inside the bottom (10) that is being moulded.
  • the partition (300) is made of rigid plastic materials, in such a way to be irreversibly joined and enclosed between the plastic materials poured in the said compartments (V1 , V2) when they tend to penetrate partially.
  • the partition (300) must be positioned on the bottom of the impression (4) using a series of suitable metal pins (S) provided hereby.
  • the partition (300) has a slightly lower height and width than the impression (4) in which it is inserted, thus creating corresponding upper and lateral passage sections (SP1 , SP2).
  • the partition (300) can be completely incorporated and held between the two moulding materials, thus becoming a permanent integral part of the bottom (10) extracted from the mould (1 ).
  • the pins (S) used to hold in vertical position the partition (300) inside the impression of the mould (1 ) are provided on the lateral sides of the partition (300) with an inclination that makes them converge towards the top of the mould (1 ).
  • This special position of the lateral pins (S) has been provided in order to allow the partition (300), which is incorporated in the structure of the bottom (10), to be easily removed from the pins, when the entire bottom (10) has been removed from the mould (1 ).

Landscapes

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

Abstract

La présente invention concerne un moule pour un dessous de chaussure réalisé en matières plastiques, du type comportant un couvercle de fermeture (2), caractérisé en ce qu’il est pourvu, à peu près à mi-chemin sur la longueur de l’impression (4), d’au moins une cloison (3) verticale transversale pour former deux compartiments (V1, V2) séparés à l’intérieur de l’impression (4), qui sont conçus pour être mis en communication l’un avec l’autre; la présente invention concerne également le dessous de chaussure obtenu au moyen dudit moule.
PCT/EP2009/052413 2008-02-29 2009-02-27 Moule pour dessous de chaussure pourvu d’une structure monolithique avec une rigidité différentiée et dessous obtenu au moyen dudit moule WO2009106634A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMC20080036 ITMC20080036A1 (it) 2008-02-29 2008-02-29 Stampo per la formatura di un fondo per calzature avente struttura monolitica a rigidita differenziata e fondo realizzato con tale stampo.
ITMC2008A000036 2008-02-29

Publications (1)

Publication Number Publication Date
WO2009106634A1 true WO2009106634A1 (fr) 2009-09-03

Family

ID=40291574

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/052413 WO2009106634A1 (fr) 2008-02-29 2009-02-27 Moule pour dessous de chaussure pourvu d’une structure monolithique avec une rigidité différentiée et dessous obtenu au moyen dudit moule

Country Status (2)

Country Link
IT (1) ITMC20080036A1 (fr)
WO (1) WO2009106634A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100008351A1 (it) * 2021-04-02 2022-10-02 Omnia Tecnologie S R L Fondo per calzature trasparente con inserti di materiale e cavità di tipo perfezionato
US11772311B1 (en) * 2022-08-05 2023-10-03 Braxton McNaughton Method of manufacturing a fishing lure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420934A1 (fr) * 1978-03-28 1979-10-26 Pasquier Groupe Gep Semelle entrant dans la constitution d'articles chaussants
EP0043369A1 (fr) * 1980-07-01 1982-01-06 Distropat Ag Semelle pour chaussure et procédé pour sa fabrication
US20060061012A1 (en) * 2003-10-09 2006-03-23 Nike, Inc. Article of footwear with a stretchable upper and an articulated sole structure
US20070126146A1 (en) * 2005-12-05 2007-06-07 Kuo-Nan Yang Method for manufacturing composite shoe insole
US20070216065A1 (en) * 2006-03-14 2007-09-20 King Steel Machinery Co., Ltd. Method for filling polymer materials into a hot-mold for manufacturing a multizone polymer blank

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420934A1 (fr) * 1978-03-28 1979-10-26 Pasquier Groupe Gep Semelle entrant dans la constitution d'articles chaussants
EP0043369A1 (fr) * 1980-07-01 1982-01-06 Distropat Ag Semelle pour chaussure et procédé pour sa fabrication
US20060061012A1 (en) * 2003-10-09 2006-03-23 Nike, Inc. Article of footwear with a stretchable upper and an articulated sole structure
US20070126146A1 (en) * 2005-12-05 2007-06-07 Kuo-Nan Yang Method for manufacturing composite shoe insole
US20070216065A1 (en) * 2006-03-14 2007-09-20 King Steel Machinery Co., Ltd. Method for filling polymer materials into a hot-mold for manufacturing a multizone polymer blank

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100008351A1 (it) * 2021-04-02 2022-10-02 Omnia Tecnologie S R L Fondo per calzature trasparente con inserti di materiale e cavità di tipo perfezionato
US11772311B1 (en) * 2022-08-05 2023-10-03 Braxton McNaughton Method of manufacturing a fishing lure

Also Published As

Publication number Publication date
ITMC20080036A1 (it) 2009-09-01

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