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WO2014140406A1 - Moule à chambre intégrée pour la fabrication de pièces en mousse plastique - Google Patents

Moule à chambre intégrée pour la fabrication de pièces en mousse plastique Download PDF

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Publication number
WO2014140406A1
WO2014140406A1 PCT/ES2014/070188 ES2014070188W WO2014140406A1 WO 2014140406 A1 WO2014140406 A1 WO 2014140406A1 ES 2014070188 W ES2014070188 W ES 2014070188W WO 2014140406 A1 WO2014140406 A1 WO 2014140406A1
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WO
WIPO (PCT)
Prior art keywords
imprint
imprints
mold according
wall
mold
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.)
Ceased
Application number
PCT/ES2014/070188
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English (en)
Spanish (es)
Inventor
Doroteo OLMEDO TEJEDOR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DOROTEO OLMEDO SL
Original Assignee
DOROTEO OLMEDO SL
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 DOROTEO OLMEDO SL filed Critical DOROTEO OLMEDO SL
Publication of WO2014140406A1 publication Critical patent/WO2014140406A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3814—Porous moulds
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B29C33/048—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam using steam
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/44—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form
    • B29C44/445—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length in solid form in the form of expandable granules, particles or beads
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B29K2025/04—Polymers of styrene
    • B29K2025/06—PS, i.e. polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Definitions

  • the present invention falls within the field of manufacturing by molding parts of plastic foams, such as expanded polystyrene, polypropylene, polyethylene or polyurethane.
  • the invention relates to molds for plastic foams that fuse their particles by energy in the form of heat, generally by steam.
  • the molding machine performs a continuous molding cycle, starting with the closing of the machine and ending with the opening for the expulsion of the EPS part.
  • a cycle takes an average of 60 seconds depending on the piece to be molded and the type of foam used.
  • FIG. 1 A sectional view of a conventional molding machine for the manufacture of an EPS part is shown in Figure 1.
  • the machine has a fixed chamber 1 that is generally made of steel with an anticorrosive treatment to prevent water vapor from damaging its surface. Some machinery manufacturers also install insulating elements to prevent water vapor from losing heat energy by exchanging it with the mass of steel.
  • a part of the mold called matrix 5 or cavity is mounted on this fixed chamber 1, which creates a tight volume inside the fixed chamber 1. During the molding cycle this water volume circulates both the water vapor and the water of cooling, and vacuum also occurs and compressed air passes through the chamber.
  • the space between the matrix 5 and the male 9, also called imprints, defines the shape of the molded part 11 of EPS.
  • matrix and male are constructed with aluminum sheets between 15 and 20 mm thick, depending on the size of the piece to be molded.
  • the fixed chamber 1 at its rear is closed by a back plate 2, also called an injector holder plate, which is made of aluminum and has a thickness that varies between 10 and 30 mm depending on the machine for which the mold is manufactured.
  • a back plate 2 also called an injector holder plate, which is made of aluminum and has a thickness that varies between 10 and 30 mm depending on the machine for which the mold is manufactured.
  • This plate guarantees the hermetic closing of the rear part of the fixed chamber to avoid leaks (steam, water, air, etc.). It also supports the injectors 12 that They introduce the EPS beads inside the mold, and reinforce the mold structure to withstand the pressures of steam, demoulding, etc.
  • the machine also has cylinders 3, 8 (in the fixed chamber 1 and mobile 10, respectively) of aluminum with diameters ranging between 20 and 30 mm, which are used to prevent buckling caused by deformations in the mold when It is subjected to the steam pressures of the molding cycle.
  • the molding machines are provided with an automatism that performs the molding cycle by opening and closing the valves (not shown in the figures) that correspond in each part of the molding cycle. All molding machines follow the same molding cycle that can be synthesized in the stages:
  • Vaporization in this phase the melting or sintering of the EPS beads occurs, applying heat energy through a steam flow at approximate temperature conditions of 115 ° C and a maximum pressure of 1.2 bar (up to 5 bar in the case of expanded polypropylene, EPP).
  • This vaporization stage consists of four phases:
  • Vapor sweep at the time of completing the filling of the EPS bead mold, the fixed chamber 1 of the die 5 and the mobile chamber 10 of the male 9 are filled with air. To replace this air with water vapor the machine opens the valves of both chambers as well as the condensate valves of both chambers, which generates a flow of water vapor that enters through the top of the machine and exits through the bottom by a condensate circuit, expelling the air present in the chambers.
  • the machine applies steam flow simultaneously in the two chambers, fixed and mobile, keeping the condensate valves closed.
  • the vapor pressure in this phase ranges around 1.2 bar (up to 5 bar in EPP),
  • the invention relates to a mold for the manufacture of plastic foam parts according to claim 1. Preferred embodiments of the mold are defined in the dependent claims.
  • the mold of the present invention incorporates the chamber for the circulation of the different fluids involved in the process.
  • This chamber is incorporated directly into the imprints of the mold.
  • both the matrix imprint and the male imprint are hollow.
  • the mold for the manufacture of a piece of plastic foam comprises: at least a first imprint supported in a first chamber of a molding machine;
  • the first and second imprints are hollow, defining within them a soul or chamber connected with said space through a plurality of perforations for the circulation of fluids through the first and second imprints to and from said space;
  • the first imprint and the second imprint can be formed in a single piece. Or they can also be formed, each, by two or more pieces.
  • the first imprint and the second imprint are preferably formed by a first outer wall and a second inner wall connected to each other by structural elements - such as pillars or ribs - the plurality of perforations being in the second inner wall that is adjacent to the space .
  • one of the imprints is a matrix imprint and the other is a male imprint.
  • the mass of metal in contact with the steam is reduced with respect to traditional molds by up to 5 times, which implies a significant reduction in the mass of steam used to heat the mold and at the same time the time needed to cool down is reduced the same.
  • the mold of the invention can be multicavity, that is, a mold having two or more pairs of first and second imprints so as to form two pieces of EPS in each cycle.
  • each imprint has its own pierced soul and its means of entry and exit of fluids.
  • the perforated souls of the first two imprints are connected to each other, as far as fluid circulation is concerned, forming a single soul;
  • the two second imprints can also have their souls connected to each other, for the purpose of fluid circulation, forming a single soul.
  • they since there is a single soul common to both first imprints, they can share the fluid inlet and outlet media and that there is a single fluid inlet in one of the first imprints, and a single fluid outlet in the other first imprint, circulating the fluids through the fluid connection that exists between them.
  • the first and second imprints are preferably made of one of: stainless steel, aluminum alloys, brass alloys, bronze alloys or titanium alloys.
  • the imprints can be manufactured with a manufacturing method by means of additive systems, such as a metallurgical powder sintering method, or using wax casting techniques.
  • the imprints are formed by two or more pieces, they can be manufactured by a mechanized method of material removal.
  • At least the second inner walls are made of a porous material.
  • the first and second imprints have a coating of a material to give hardness to the imprints or to improve the thermal properties of the imprint.
  • they can carry a nickel coating, which would improve their characteristics in terms of hardness and corrosion, or it can be a Teflon coating, which would improve the thermal characteristics.
  • Figure 1 shows a section of a molding machine with conventional mold for the manufacture of an EPS part.
  • Figure 2 shows the fixed and mobile cameras of the machine of Figure 1.
  • Figure 5 shows a section of the matrix along the plane A-A of the top view of Figure 4.
  • Figure 6 shows an enlargement of the area A of Figure 5.
  • Figure 8 shows a section of the matrix along the D-D plane of the top view of Figure 4.
  • Figures 9 and 10 show sections BB and CC, respectively, of the bottom view of Figure 4.
  • Figure 11 shows a sectional view of the two imprints, matrix and male, of the mold of the invention with the mold closed.
  • Figure 12 shows a top, front and bottom view of the mold of Figure 11.
  • Figure 13 shows a section of the mole along the E-E plane of the top view of Figure 12.
  • Figure 14 shows a section of the mole along the F-F plane of the bottom view of Figure 12.
  • Figure 15 shows a rear view of the matrix mounted on the matrix plate and with the fluid inlet and outlet pipes already mounted on the matrix.
  • Figure 6 shows a sectional view of a molding machine with a mold according to a second embodiment of the invention.
  • Figure 17 shows a front and sectional view of the die imprint of the mold of Figure 16.
  • Figure 19 shows a partially sectioned perspective view of the closed matrix and male imprints according to the second embodiment of the invention.
  • Figures 1 and 2 show an expanded polystyrene parts molding machine, EPS, with a conventional mold.
  • Figure 3 shows a sectional view of a molding machine with a mold according to a first possible embodiment of the invention. (The same numerical references have been used for elements equal to those of the conventional molding machine).
  • the matrix 50 which is constituted of a single piece, is formed by an outer wall 51 and an inner wall 52 that are connected to each other by pillars 54 of circular section being defined between both walls a soul 55.
  • the die 50 it consists in the inner wall 52 that is in contact with the EPS beads of a micro-perforation pattern 53 (shown in more detail in Figure 7), or of perforations for inserting steam nozzles.
  • the core 55 of the matrix 50 is communicated with the material to be molded through these micro-perforations.
  • the male 90 of the mold according to this first embodiment of the invention is also a hollow cavity (Fig. 11, 13-14) constituted in a single piece.
  • the male 90 is formed by an outer wall 91 and an inner wall 92 that are connected to each other by pillars 94 of circular section, a soul 95 being defined between both walls.
  • the inner wall 92 of the male has a series of micro-perforations 93.
  • the core 95 of the matrix 90 is communicated with the material to be molded through these micro-perforations.
  • Figure 6 shows an enlarged view of the pillars 54 of the matrix, as a possible example of structural connecting elements between the outer and inner walls of the matrix 50.
  • the number of pillars 54, 94 and their dimension depend in each case on the matrix / male shape and the vapor, air or foam pressure to which it will be subjected. The same applies to the thickness of the inner walls 51, 91 and outer 52, 92.
  • Figures 9 and 10 show an enlarged detail of the perforations 56, the perforation 56 of Figure 9 being for fluid outlet and communicating with the core 55, while the perforation 56 of Figure 10 is for fluid entry.
  • the housings 151, 141, respectively, for the ejector plates and their axes can also be seen.
  • the other wall of the imprint that does not mold, the outer wall 51, 91 stiffens the piece, and therefore, consists of areas in which supports 57, 97 are located (more clearly shown in Figure 8 for matrix 50 , or in Figures 11, 13 or 14 for the male) so that the assembly is structurally stable.
  • hole 59 in the matrix for the introduction of the EPS beads into e! soul also serves as structural support.
  • the rear exterior wall 52 is also used as in traditional molds to fix the necessary equipment for fastening and guiding the injection and ejection systems, for which it includes the corresponding holes
  • Figure 12 it shows a top, front and bottom view of the mold of the invention, with matrix 50 and male 90.
  • the bottom view of this Figure 2 logically coincides with the bottom view of Figure 4.
  • Arrow 200 of Figure 3 shows the circulation of fluids from the entrance through the perforation 96 of the male imprint 90 to the exit through the perforation 56 of the matrix imprint 50:
  • arrow 300 of Figure 14 shows the flow of fluids from the entrance through the perforation 56 of the matrix imprint 50 to the exit through the perforation 96 of the male imprint 90: - The fluid enters through the fluid inlet perforation 56 of the matrix imprint
  • Thickness 100 of the inner wall 52, 92 minimum 2 mm.
  • Thickness 101 of the outer wall 51, 91 minimum 2 mm.
  • Thickness 102 of the soul 55, 95: 10 mm may have up to a maximum of 40 mm.
  • Step 107 of reasons for fixing supports 100 mm typical, the maximum being 200 mm so as not to have deformations greater than 0.2 mm.
  • Diameter 08, 109 of the holes or perforations 56, 96 of fluid inlet and outlet the sum of the section of the inlet diameters (108), like that of the outlet diameters (109) is not less than one hundredth part of the surface of the piece.
  • the perforations 56 for entry and exit of fluids are in the outer wall 52 of the die for connection via pipes 58 (98 in the case of the male imprint, see Fig. 3) to the different elements of the molding machine.
  • the size and type of these connections vary depending on the molding machine used and the piping systems available in the market to make those connections.
  • Figure 16 shows a sectional view of a molding machine with a mold according to a second possible embodiment of the invention.
  • the matrix imprint 50 'and the male imprint 90' are hollow cavities, each of which define within them two souls 55 ", 95 '.
  • the die 50 ' is formed by a first piece and a second piece, the first piece constituting an outer wall 51' of the die 50 'and the second piece constituting an inner wall 52' of the die 50 '(Fig. 17).
  • the first and second walls 51 ', 52' are connected to each other by ribs 54 ', which in the embodiment shown form part of the second inner part / wall 52', the soul 55 'being defined between both walls.
  • the matrix 50 ' consists of the inner wall 52' which is in contact with the EPS beads of a series of micro-perforations 53 ', or of perforations for inserting steam nozzles.
  • the male imprint 90' of the mold according to this second embodiment of the invention is also a hollow cavity (Fig. 8), formed by a first piece and a second piece.
  • the first piece constitutes an outer wall 91 'of the male 90' and the second piece constitutes an inner wall 92 ', the first and second walls 91', 92 'being connected to each other by ribs 94', which in the embodiment shown form part of the second piece / inner wall 92 ', the soul 95' being defined between both walls.
  • the inner wall 92 'of the male 90' has a series of micro-perforations 93 '. In this way the soul 95 'of the male matrix 90' is communicated with the material to be molded through these micro-perforations.
  • the matrix imprint 50 'and the male imprint 90' in this second embodiment also have respective holes 70a, 70b, 71 for the possible connection of a device for measuring pressure in the space 1 10 ( hole 70a in Fig. 19), or to measure temperature of the inner wall 52 'of the matrix imprint 50' (hole 70b in Fig. 19), or other relevant parameters of the cycle.
  • insulating gasket 83, 84 is also included, which can be, for example, klingerite or silicone or Teflon, to insulate the structural element 80, 8.
  • the mold of the invention further comprises housings 87, 88 in the first outer part or wall 51 'of the matrix 50' and in the first outer part or wall 91 'of the male 90' for injecting refrigerant if necessary and thus cool the metal (usually aluminum) of the inner walls 52 ', 92'.
  • the material in which the cavity is manufactured - matrix and male - can be any that meets the structural and temperature requirements necessary to support a molding cycle in a molding machine.
  • the imprints are preferably made of stainless steel, aluminum alloys, brass alloys, bronze alloys and titanium alloys.
  • the manufacture of these cavities is carried out by alternative methods to the removal of material when necessary, since with this technique in many cases it is mechanically impossible to achieve geometries with a soul. Therefore, lost wax casting techniques or manufacturing using additive systems are employed, such as by sintering metallurgical powder by laser.
  • the second walls / inner parts of the imprints are preferably stainless steel, aluminum alloys, brass alloys, bronze alloys and titanium alloys
  • the first outer walls / parts of the imprints are preferably made of a thermally insulating material, such as a bakelite or a resin.
  • the manufacture of these cavities is carried out by mechanized methods or material removal techniques.
  • the cavities may optionally have records for cleaning and maintenance of the soul.
  • these molds can be made in hollow cavities separated each with their soul, or they can also be cavities separated with a common soul, joining the souls through conduits or common areas.
  • the mold of the invention can be used for the manufacture of pieces with crystallized finish or "film". In such a case, once the plastic foam has been injected, a pressure is applied at which the melting temperature of the plastic foam is reached.
  • the invention is not limited to the specific embodiments that have been described but also covers, for example, the variants that can be made by the average person skilled in the art (for example, in terms of the choice of materials, dimensions , components, configuration, etc.), within what follows from the claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molding Of Porous Articles (AREA)

Abstract

La présente invention concerne un moule pour la fabrication d'une pièce en mousse plastique, comprenant : - au moins une première empreinte (50, 50') soutenue dans une première chambre (1) d'une machine de moulage; - au moins une deuxième empreinte (90, 90') soutenue dans une deuxième chambre (10) de la machine de moulage; - la première empreinte (50, 50') et la deuxième empreinte (90, 90') définissant entre elles, en position de fermeture de la machine de moulage, un espace (110) qui correspond à la pièce à mouler; - au moins un premier orifice (59, 59') dans une de la première et de la deuxième empreinte (50, 50, 90, 90') pour introduire une mousse plastique dans ledit espace (110); caractérisé en ce que : - la première et la deuxième empreinte (50, 50, 90, 90') sont creuses, définissant à l'intérieur une âme (55, 55', 95, 95') reliée audit espace (110) par le biais de plusieurs perforations (53, 53', 93, 93') permettant la circulation de fluides à travers la première et la deuxième empreinte (50, 50, 90, 90') en direction dudit espace (110) et depuis ledit espace (110); en en ce que : - la première et la deuxième empreinte (50, 50, 90, 90') comportent chacune au moins un deuxième orifice (56, 56', 96, 96') d'entrée et de sortie de fluides à l'intérieur de l'âme (55, 55', 95, 95') depuis la machine de moulage et en direction de la machine de moulage.
PCT/ES2014/070188 2013-03-14 2014-03-14 Moule à chambre intégrée pour la fabrication de pièces en mousse plastique Ceased WO2014140406A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201330373A ES2495640B1 (es) 2013-03-14 2013-03-14 Molde con cámara incorporada para la fabricación de piezas de espuma plástica
ESP201330373 2013-03-14

Publications (1)

Publication Number Publication Date
WO2014140406A1 true WO2014140406A1 (fr) 2014-09-18

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WO (1) WO2014140406A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4357103A1 (fr) * 2022-10-18 2024-04-24 Olmedo Tejedor Lda. Moule pour le moulage de pièces en matière thermoplastique
EP4538013A1 (fr) * 2023-10-11 2025-04-16 CK Teknik A/S Outil à faible consommation d'énergie et procédé de moulage d'articles en mousse de polymère expansé

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US3173175A (en) * 1958-05-09 1965-03-16 Jerome H Lemelson Molding apparatus
US3289253A (en) * 1964-01-22 1966-12-06 Robert B Buonaiuto Molds
US4272469A (en) * 1979-02-26 1981-06-09 Integrated Insulation Systems, Inc. Method and apparatus for forming expanded foam articles
US4456443A (en) * 1982-11-26 1984-06-26 Design Engineering Service Inc. Machine for steam chest molding of foamed material

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
GB2055380B (en) * 1979-07-20 1983-09-21 Cellofoam Ag Pre-expanding thermoplastic resin beads and a moulding apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3173175A (en) * 1958-05-09 1965-03-16 Jerome H Lemelson Molding apparatus
US3289253A (en) * 1964-01-22 1966-12-06 Robert B Buonaiuto Molds
US4272469A (en) * 1979-02-26 1981-06-09 Integrated Insulation Systems, Inc. Method and apparatus for forming expanded foam articles
US4456443A (en) * 1982-11-26 1984-06-26 Design Engineering Service Inc. Machine for steam chest molding of foamed material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4357103A1 (fr) * 2022-10-18 2024-04-24 Olmedo Tejedor Lda. Moule pour le moulage de pièces en matière thermoplastique
EP4538013A1 (fr) * 2023-10-11 2025-04-16 CK Teknik A/S Outil à faible consommation d'énergie et procédé de moulage d'articles en mousse de polymère expansé

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