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WO2018178774A2 - Dispositif de production de contenants en plastique - Google Patents

Dispositif de production de contenants en plastique Download PDF

Info

Publication number
WO2018178774A2
WO2018178774A2 PCT/IB2018/050769 IB2018050769W WO2018178774A2 WO 2018178774 A2 WO2018178774 A2 WO 2018178774A2 IB 2018050769 W IB2018050769 W IB 2018050769W WO 2018178774 A2 WO2018178774 A2 WO 2018178774A2
Authority
WO
WIPO (PCT)
Prior art keywords
mould
plastic material
material according
producing containers
moulding
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/IB2018/050769
Other languages
English (en)
Other versions
WO2018178774A3 (fr
Inventor
Paolo FILIBERTI
Cristian CHIAROTTO
Ireneo De Nardi
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.)
Lanfranchi SRL
Original Assignee
Lanfranchi SRL
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 Lanfranchi SRL filed Critical Lanfranchi SRL
Publication of WO2018178774A2 publication Critical patent/WO2018178774A2/fr
Publication of WO2018178774A3 publication Critical patent/WO2018178774A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/56—Opening, closing or clamping means
    • B29C49/5601—Mechanically operated, i.e. closing or opening of the mould parts is done by mechanic means
    • B29C49/5602—Mechanically operated, i.e. closing or opening of the mould parts is done by mechanic means using cams
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/56—Opening, closing or clamping means
    • B29C49/5601—Mechanically operated, i.e. closing or opening of the mould parts is done by mechanic means
    • B29C49/5603—Mechanically operated, i.e. closing or opening of the mould parts is done by mechanic means using toggle mechanism
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/56—Opening, closing or clamping means
    • B29C2049/563—Clamping 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/56—Opening, closing or clamping means
    • B29C2049/5636—Opening, closing or clamping means using closing means as clamping 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/28—Blow-moulding apparatus
    • B29C49/28006—Blow-moulding apparatus having special frame
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/56—Opening, closing or clamping means
    • B29C49/561—Characterised by speed, e.g. variable opening closing speed
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/56—Opening, closing or clamping means
    • B29C49/5613—Opening, closing or clamping means characterised by connected mould part movement, e.g. bottom part movement is linked to mould half movement
    • 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
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles

Definitions

  • the present invention concerns a device for the production of containers of plastic material, such as for example PET (polyethylene terephthalate) bottles for beverages, using a stretch-blow moulding method.
  • plastic material such as for example PET (polyethylene terephthalate) bottles for beverages
  • Various types of machines are known from the prior art for the production of plastic containers through the stretch-blow moulding process.
  • these machines include: a charging section for the so-called "parisons”; a heating section for said parisons; and a bottle-moulding section.
  • This latter section consists of a press with one or more moulds, each of which is made up of two half shells that are movable with respect to each other between an open position for inserting the parisons and a closed position for moulding the containers.
  • the opening/closing of the moulds is controlled for example by motorized driving cams.
  • the moulding of the containers is carried out in the moulds through a mechanical stretching action and by blowing in compressed air up to 40 bar.
  • the parisons are moved through the heating section by means of a chain conveyor moving in a rectilinear path.
  • parisons are then collected from the chain conveyor in the heating section and are transferred into the mould in the press and extracted from there by means of tongs gripping the necks of the bottles, following a circular path (rotating blowers) or a rectilinear path (linear blowers).
  • the present invention refers to blow-moulding machines of linear type for the production of containers made of plastic materials, such as PET (polyethylene terephthalate) bottles for beverages.
  • PET polyethylene terephthalate
  • the present invention refers to the device for opening/closing the moulds of these machines.
  • the main technical problem that is to be solved with the present invention is substantially to create a linear blow-moulding machine provided with a moulding device that operates with a continuous process, that is, without stopping between the different operating steps, so as to eliminate, or considerably reduce, the energy consumption of the device.
  • it is considered necessary to operate on the device for opening/closing the moulds in which the parisons are inserted and wherein the bottles are moulded by blowing in compressed air.
  • the objective of the invention is achieved with a linear blow-moulding machine in which the means that operate the opening/closing of the two half shells forming the mould for creating the containers are made up of toggle joints that are driven, in synchronism with each other but in opposite directions of rotation, by a motorized rotating cam, as specified in claim 1 of the present patent.
  • FIG. 1 is a partial schematic view of a press according to the invention with a mould in the open position;
  • Figure 2 illustrates in a schematic view the press of Figure 1 with the mould in the closed position
  • FIG. 12 illustrates the linear diagram of the displacement speed of the mould holder.
  • the blow-moulding machine comprises a support structure 20 on which is installed at least one mould for moulding plastic bottles.
  • the outline of a bottle to be moulded is shown in the figures with a broken line.
  • the mould consists substantially of two half shells 22 that are hollowed so as to define the shape of the bottles to produce.
  • the two half shells 22 are arranged in a vertical position and are driven to slide in a horizontal direction for their opening/closing movement.
  • each toggle joint 30 is formed by at least one pair of arms, hinged to each other, each pair of arms forming a connecting rod 32 and a crank 34.
  • the connecting rod 32 connects the mould holder 24 with the crank 34.
  • the crank 34 is rotatable around a fixed pin on the support structure 20.
  • the connecting rod 32 and the crank 34 of each toggle joint 30 have different lengths.
  • the ratio of the length of the connecting rod 32 to the length of the crank 34 is greater than 2.
  • Each toggle joint 30 is connected to a rod 40, at the upper end of which is rotatably hinged the connecting rod 32.
  • the lower end of each rod 40 is driven by a cam device 42, that is connected to a motor 44 through a drive shaft 46.
  • the two half shells 22 are driven through the respective kinematic linkwork made up of: motor 44, shaft 46, cam 42, rod 40, toggle joint 30.
  • the motor 44 drives, through the shafts 46, the cams 42 in synchronized motion but with opposite directions of rotation, to determine the opening/closing of the half shells 22.
  • FIGs 3 to 8 illustrate a toggle joint 30 and the relative cam device 42 in different and successive phases of operation, or of rotation of the motorized cam, for the opening/closing cycle of the half shells 22.
  • each mould holder 24 is connected to the support structure 20 through a double toggle joint 30, driven by the same rod 40; the two toggle joints 30 are arranged superimposed one one another and spaced apart in the vertical direction ( Figures 1 and 2).
  • Figure 3 corresponds to the position of half shells 22 completely closed (see Figure 2), during the blowing-in phase for moulding the bottle.
  • the cam device 42 is in the lowest position (angle of 0 °), and the rod 40 holds the toggle joint 30 with the connecting rods 32 and the cranks 34 with their horizontal axes aligned with each other, that is, in their maximum extension.
  • Figure 4 corresponds to an open position of the half shells 22 to start the discharge of the bottles.
  • the cam device 42 is in a rotated position (angle of 90 °), with the consequent rotation of the rod 40 and the toggle joint 30.
  • the connecting rods 32 and the cranks 34 are rotated at a maximum angle with respect to each other.
  • Figure 5 corresponds to a successive position of the half shells 22 in a further opening phase; the cam device 42 is in a further rotated position (angle of 124°). The connecting rods 32 and the cranks 34 are rotated, but aligned with each other.
  • Figure 6 corresponds to the position of the half shells 22 completely open (see Figure 1 ), to allow the ejection of the moulded bottle and the insertion of the next parison.
  • the cam device 42 is at its highest position (angle of 180 °), and the rod 40 holds the toggle joint 30 with the connecting rods 32 and the cranks 34 respectively rotated in their position of minimum extension.
  • Figure 7 corresponds to the position of the half shells 22 in the closure start phase, after the parison has been inserted.
  • the cam device 42, the rod 40 and the toggle joint 30 are in a substantially symmetrical and opposite position with respect to the one of Figure 5.
  • the angle of the cam device 42 is 247°.
  • Figure 8 corresponds to the position of the half shells 22 in the closing phase.
  • the cam device 42, the rod 40 and the toggle joint 30 are in a position substantially symmetrical and opposite with respect to the one of Figure 4.
  • the angle of the cam device 42 is 270 °.
  • Figures 9 to 12 are diagrams that describe the complete rotation of the cam device 42 and show the continuity of the mould opening/closing movement, with variable and adjustable speeds so as to optimize the container moulding process, also on the basis of their different dimensions.
  • Figure 9 illustrates the angular diagram of the cam 42 that controls the displacement of the mould holder 24, while Figure 1 0 illustrates the linear diagram of the displacement of the mould holder 24, based on the angle of the cam 42.
  • Figures 9 and 10 illustrate the continuity of the movement of the device that controls the opening/closing of the half shells 22.
  • Figure 1 1 illustrates the angular diagram of the displacement speed of the mould holder 24, while Figure 12 illustrates the linear diagram of the displacement speed of the mould holder 24.
  • Figures 1 1 and 12 also show the continuity of movement of the device that controls the opening/closing of the half shells 22.
  • the device according to the present invention makes it possible to achieve the desired objective, that is, to create a linear blow-moulding machine for the production of containers of plastic material provided with a moulding device that operates with a continuous process, in other words without stops between the different operating stages, so as to eliminate, or considerably reduce, the energy consumption of the machine.

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

Abstract

L'invention concerne une machine de production de contenants en matière plastique, tels que des bouteilles, par le procédé de moulage par soufflage avec étirage, comprenant sensiblement : une section d'introduction de ce que l'on appelle les " paraisons ", une section de chauffe des paraisons, et une section de moulage de bouteille. La section de moulage de bouteille comporte une structure de support (20) sur laquelle est installé au moins un moule comportant deux demi-coques (22), une paraison y étant enfermée pendant le traitement de moulage par soufflage ; lesdites demi-coques (22) se faisant verticalement face et étant appropriées pour un déplacement dans une direction horizontale. Les moyens d'actionnement de l'ouverture/fermeture des deux demi-coques (22) du moule sont constitués d'articulations (30) à genouillère, chaque articulation (30) étant commandée par une came rotative respective (42), lesdites cames étant entraînées par un moteur (44) de manière synchrone l'une avec l'autre et entraînées en rotation en sens contraire.
PCT/IB2018/050769 2017-03-30 2018-02-08 Dispositif de production de contenants en plastique Ceased WO2018178774A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000035363A IT201700035363A1 (it) 2017-03-30 2017-03-30 Dispositivo per la produzione di contenitori in materiale plastico
IT102017000035363 2017-03-30

Publications (2)

Publication Number Publication Date
WO2018178774A2 true WO2018178774A2 (fr) 2018-10-04
WO2018178774A3 WO2018178774A3 (fr) 2018-12-06

Family

ID=59700049

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2018/050769 Ceased WO2018178774A2 (fr) 2017-03-30 2018-02-08 Dispositif de production de contenants en plastique

Country Status (2)

Country Link
IT (1) IT201700035363A1 (fr)
WO (1) WO2018178774A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111452291A (zh) * 2020-05-25 2020-07-28 天津原谷科技有限公司 一种双色注塑模具
EP4043181A4 (fr) * 2019-10-09 2022-11-30 Jiangsu Newamstar Packaging Machinery Co., Ltd Mécanisme de bielle combiné de type à bielle pleine pour liaison entre un moule ouvrant et fermant et un moule inférieur d'une machine de soufflage de bouteilles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5238389A (en) * 1991-06-03 1993-08-24 Husky Injection Molding Systems Ltd. Apparatus for preparing a hollow plastic article
WO1998038025A1 (fr) * 1995-11-08 1998-09-03 Kao Corporation Dispositif de serrage pour machines de soufflage
ITMI20012230A1 (it) * 2001-10-24 2003-04-24 Magic Mp Spa Macchina per la formatura a soffiaggio di contenitori in materiale plastico dotata di dispositivi di azionamento di tipo elettrico
TWI387519B (zh) * 2010-05-21 2013-03-01 Univ Nat Sun Yat Sen 多連桿式模具開閉機構
CH710158A2 (de) * 2014-09-26 2016-03-31 Sysmotion Ag Schliesssystem für vollelektrische Spritzgiessmaschinen und Hohlkörperblasanlagen.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4043181A4 (fr) * 2019-10-09 2022-11-30 Jiangsu Newamstar Packaging Machinery Co., Ltd Mécanisme de bielle combiné de type à bielle pleine pour liaison entre un moule ouvrant et fermant et un moule inférieur d'une machine de soufflage de bouteilles
CN111452291A (zh) * 2020-05-25 2020-07-28 天津原谷科技有限公司 一种双色注塑模具

Also Published As

Publication number Publication date
IT201700035363A1 (it) 2018-09-30
WO2018178774A3 (fr) 2018-12-06

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