WO2001047688A2 - Procede et appareil destines au traitement de preformes plastiques - Google Patents

Procede et appareil destines au traitement de preformes plastiques Download PDF

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Publication number
WO2001047688A2
WO2001047688A2 PCT/BE2000/000155 BE0000155W WO0147688A2 WO 2001047688 A2 WO2001047688 A2 WO 2001047688A2 BE 0000155 W BE0000155 W BE 0000155W WO 0147688 A2 WO0147688 A2 WO 0147688A2
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WO
WIPO (PCT)
Prior art keywords
preform
preforms
receptacle
process according
blowing
Prior art date
Application number
PCT/BE2000/000155
Other languages
German (de)
English (en)
Other versions
WO2001047688A3 (fr
Inventor
Dirk De Cuyper
Original Assignee
Resilux
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 Resilux filed Critical Resilux
Priority to AU23333/01A priority Critical patent/AU2333301A/en
Publication of WO2001047688A2 publication Critical patent/WO2001047688A2/fr
Publication of WO2001047688A3 publication Critical patent/WO2001047688A3/fr

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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
    • 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
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • 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
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • 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
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0722—Preforms or parisons characterised by their configuration having variable wall thickness at neck portion
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0724—Preforms or parisons characterised by their configuration having variable wall thickness at body portion
    • 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
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • 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
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0731—Preforms or parisons characterised by their configuration having variable diameter at neck portion
    • 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
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0733—Preforms or parisons characterised by their configuration having variable diameter at body portion
    • 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
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • B29C2949/0774—Interrupted threads
    • 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
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0777—Tamper-evident band retaining ring
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • 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
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/42414—Treatment of preforms, e.g. cleaning or spraying water for improved heat transfer
    • 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
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/68—Ovens specially adapted for heating preforms or parisons
    • B29C49/6835—Ovens specially adapted for heating preforms or parisons using reflectors
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • 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
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • 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
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0072—Roughness, e.g. anti-slip

Definitions

  • This invention relates to a process for manufacturing hollow objects, in particular plastic preforms, intended for being processed subsequently to plastic receptacles, wherein the preforms are blown to receptacles.
  • PET packaging such as receptacles of the bottle type for an extended range of products such as oils, more particularly eatable oils, water, drinkable water, and other beverages, such as soft drinks either carbonated or not.
  • oils such as oils, more particularly eatable oils, water, drinkable water, and other beverages, such as soft drinks either carbonated or not.
  • it relates also to less liquid materials of the type mayonnaise, ketch-up, vinegar sauce, and shampoos, cosmetics, pharmaceuticals e.a. as well. These materials have a higher viscosity and consistency.
  • the preforms are heated to a determined blowing temperature before the blowing operation .
  • blowing machines In the manufacturing of preforms for receptacles, there is the problem of limited capacities of the blowing machines on the one hand and of the appropriate heating on the other hand .
  • These blowing machines are used for the final transformation of preforms to the final products as receptacles, such as bottles and so on , as described in document EP 0 720 566. This transformation may occur in one or two main steps. In the stage which preceeds the blowing of the preforms, the latter are heated so that they get into the blowing moulds at the suitable temperature, in which moulds they are blown up to the final receptacles.
  • the conveying speed of the preforms in the heating line of the blowing machine m ust be adapted to the constraints which presrcribe the appropriate heating temperature of the preforms. This creates a limitation of the capacity of such blowing machines.
  • the object of this invention is to offer a solution to the above- mentioned problem.
  • a process in which the preforms are blown up to a receptacle and wherein the preforms are heated before the blowing operation to a determined blowing temperature by means of heating elements said process being remarkable in that the wall of the preform is treated by applying a structure operation or respectively unpolishing operation to the su rface roughness.
  • An optimisation of the blowing process is thus achieved when manufacturing the preforms and the receptacles obtained by transforming the latter, which results i n a shorter occu pation of the blowing machine, thus enhancing an increased capacity thereof.
  • a local structure modification is achieved by matting the preform and/or through a global surface enlargement.
  • a structure modification is thus implemented on the wall of the preform, i.e. outside or inside or both , with an increased local su rface so that the heat originating from the radiation of the preforms as proposed according to a further embod iment of the invention is absorbed much better thanks to the irregular surface of the preform wall.
  • the preform used is coloured such that there is a still better absorption of the energy.
  • An outstanding preform is obtained by a combination of colouring and matting , wherein the colouring provides a better general absorption of energy and the matt character provides an increased local absorption of energy by the preform wall.
  • additives are added to the composition of the material of the preform so that the absorbtion of radiation is still more enhanced.
  • An add itional advantage resulting from the process according to the invention consists in that a better removal of the preform from the mandrel of the forming mould is achieved , in other words a better removal of the preform is achieved when mould injecting in the first shaping stage, as described in document EP 0 686 081 , the teachings of which are considered to be incorporated in this application by way of reference.
  • the process is applied along determined selected areas.
  • blowing the preforms one part thereof is not blown , the neck part.
  • the bottom area of the preform is not blown either strictly spoken.
  • quantifying the heat is a particularly sensitive problem. In case the heating is too strong, this causes a deformation of the preform and thus of the bottle as well, resulting in that a rubbish product is generated .
  • the blowing operation becomes inefficient so that in such cases blowing up does not provide the desired shape.
  • this heating occurs in a classical way in a so-called heating line, at least at one side of which an arrangement of heating lamps is provided .
  • Smaller preforms which do not extend over the complete radiating height of said heating line may cause an efficiency problem, since no specific area heating can be generated by means of infrared lamps.
  • the aforementioned selectivity is achieved by a selective treatment of the preform .
  • Said selected areas may advantageously be choosen in all varying and/or discontinuous areas of the preform , such as transition areas and/or having variating wall thicknesses. This occurs for laterally flattened receptacles which are thinner at said flattened sides to provide a better pinching capacity thereof, whereas the extreme sides have a thickened profile in order to enhance the stiffness of the receptacle.
  • the geometry of the preform is quite important. Limitations in this case are prescribed by the basic material which is choosen and by the geometry of the preform with respect to the bottle.
  • the aim here consists in modifying a physical characteristic of the basic material, i.e. its surface roug hness. On the other side, the chemical action is so little as possible, which means that the action on the composition of the material itself is so little as possible.
  • This invention also relates to an apparatus for implementing the aforementioned process.
  • the preforms are oriented and conveyed successively to the blowing machine.
  • the preforms are brought into a rotary movement and conveyed before heating boxes having heating lamps with a specific area heating , resulting in that the preforms achieve a heating profile which is different for each preform and/or bottle and/or receptacle.
  • this heating there is still a determined balancing time in order to let the heat penetrate the preforms , after which said preforms are blown to a bottle or receptacle in a blow mould . Further advantages and particularities of this invention are defined in further su b-claims .
  • Fig ure 1 is a front view of a preform which is virtually completely treated according to a first embod iment of the invention .
  • Fig ure 2 is a front view of a preform which is partly treated accord ing to a second embod iment of the invention .
  • Figu re 3 is a front view of a preform which is partly treated according to a third embod iment of the invention.
  • Figure 4 represents a diagrammatic view of the heating circuit for the process according to the invention.
  • Figure 5 is a diagrammatic view of the efficiency curves of the heating elements which are used in the process according to the invention.
  • Figures 6 and 7 are respective diagrammatic views of the mutual arrangement of preforms to be treated according to the process according to the invention on the one hand and heating elements thereby used on the other hand .
  • a preform 1 is represented in Fig ure 1 which was Isubmitted to a complete treatment of the part which is intended to be blown , i.e. a part out of the neck 4.
  • This full treatment state is represented on the Figure with the reference sign A.
  • the advantage thereof is that the preform absorbs more heat over its entire body, possibly between 1 0 and 20% more heat absorption . Thanks to this, blowing machines with a limited heating capacity can produce a higher output, in particular for preforms requiring much heating , for example refillable and other thickwalled prod ucts, and so on .
  • the treatment occurs preferably on the inner and the outer wall as well .
  • Figure 2 shows a selective treatment of the preform which has the advantage that areas of the preforms with problems absorbs additional heat in the prospect of an optimization of the blowing .
  • the treatment state of said problem areas is represented on the figure by means of the reference signs B and C respectively.
  • Problem areas for preforms are for instance the bottom 2 and the neck 4 thereof. In the neck part 4, there is a disturbing influence from the neck ring 5 which is most of the time cooled off and which needs to maintain its original shape after the blow operation and it is therefore isolated with a cooling shield .
  • the bottom has the problem that this side which shows the so-called injection point 6 is located fu rther from the heating lamps which are arranged laterally respective to the preforms as visible on fig ure 7 for instance and thus receives less radiating heat.
  • Figure 3 shows another treatment area of the preform which may essentially be adapted on any desired part of the preform.
  • the treatment state for this case is represented with the reference sign D.
  • This example offers the advantage that for certain types of bottles, such as oval or rectangular bottles for instance, an additional heat absorption area can be created so that it becomes easier to blow them .
  • a great energy saving can be achieved for this treatment application as well in an analogous way since the parts requiring the most heat absorb more heat. In this way problems which are created because of a specific shape of the receptacle can be solved efficiently thanks to the implementation of the process according to the invention.
  • the selective treatment B and/or C and/or D of the preforms makes it possible to parametrise the treatment in an optimal way and to bring into account an extremely wide range of possibilities for implementing this process.
  • a particular case here is the one of the flattened receptacles, particularly receptacles having a substantially oval cross-section . They have thinner sides making the pinching thereof easier for the user. The extreme sides on the contrary show a thicker section providing the required stiffness to the receptacle.
  • FIG. 4 the diagrammatic representation of figure 4 there is shown a instanteneous position of a preform 1 d uring the heating process thereof in a heating line respective to a heating box 13 with heating lamps 12 which are arranged accord ing to the longitudinal d irection I of the preform.
  • the heating boxes are started throug h a fuse 1 1 connected to a source 1 0.
  • the temperature is represented through a unit 14 which is connected to a PLC u n it 1 5.
  • Said unit 1 5 is con nected to a pyromat 16 on which a pyrometer 17 is connected.
  • a branch having a thyristor 18 and controlling units 1 9, 20 is incorporated in the heating circuit.
  • the preblowing together with the temperature profile determine the material distribution in the bottle.
  • the preforms 1 are orientated and conveyed successively to the blowing machine in a heating line 13 along direction of arrow F represented diagramatically with the conventional cross sign in a circle on the fig ure. After this the preforms are moved in a rotary motion and conveyed before heating boxes.
  • the latter have heating lamps 12 with a specific area heating which is represented on figure 5. In this way, the preforms get a heating profile which is different for each bottle or receptacle.
  • suitable reflectors 22, 23 , 24 e.g . between the infrared lamps 12, the radiating pattern can be modified depending on the needs of the case.
  • a top reflector 21 may further be used for supplying radiating energy from the laterally arranged lamps to the bottom 2 of the preforms. After this heating along areas, some balancing time is still req uired in order to have the heat absorbed in the preforms as clearly represented in the differently hatched areas of fig ure 6, the processing state whereof is indicated by reference letters E and F, having a respective etch ing over the whole wall thickness 3 or merely a part thereof, depending on the wavelength ⁇ and/or the power of the radiating sources 12 used . Subse ⁇ ue ⁇ t ' the n reforms 1 are blown to a bottle or receptacle in a blow mould .
  • the blowing operation is usually carried out in two steps : a first blowing pressure (between 4 and 20 bar) is applied for preforming the bottle or receptacle followed by a second blowing pressure (between 10 and 45 bar) for finalizing the shaping of the bottle or receptacle.
  • a first blowing pressure between 4 and 20 bar
  • a second blowing pressure between 10 and 45 bar
  • the product is stretched bi-axially in order to achieve an optimal strength .
  • This is usually performed by means of the blow pressure and a stretch rod.
  • the stretch rod provides a pre-orientation in the length direction and also allows the bottom or the injection point to remain in the midd le, resulting in that the wall thickness variation of the bottom remains limited .
  • the second blowing pressure is essentially intended to press the bottle well against the mould wall so that the cooling off occurs in the most efficient way.
  • the second blowing pressure is preferably comprised between 20 and 40 bar, depend ing on the receptacle type.
  • the second blowing pressure needs to be applied as soon as possible after the fore-blowing .
  • the bottle must be shaped almost or completely for preventing overstretching .

Abstract

Procédé de fabrication d'articles creux (1) et notamment de préformes plastiques destinées à être ensuite transformées en réceptacles plastiques et procédé correspondant. Les préformes sont soufflées dans un réceptacle et chauffées avant l'opération de soufflage jusqu'à une température déterminée au moyen d'éléments chauffants. Le procédé et l'appareil de l'invention sont caractérisés en ce que la paroi de la préforme est traitée par l'application d'une opération structurelle ou la modification de la rugosité de surface.
PCT/BE2000/000155 1999-12-24 2000-12-22 Procede et appareil destines au traitement de preformes plastiques WO2001047688A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23333/01A AU2333301A (en) 1999-12-24 2000-12-22 Process and apparatus for treating plastic preforms

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9900840 1999-12-24
BE9900840 1999-12-24

Publications (2)

Publication Number Publication Date
WO2001047688A2 true WO2001047688A2 (fr) 2001-07-05
WO2001047688A3 WO2001047688A3 (fr) 2002-07-11

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7189777B2 (en) 2003-06-09 2007-03-13 Eastman Chemical Company Compositions and method for improving reheat rate of PET using activated carbon
US7662880B2 (en) 2004-09-03 2010-02-16 Eastman Chemical Company Polyester polymer and copolymer compositions containing metallic nickel particles
EP2173531A1 (fr) * 2007-07-05 2010-04-14 Husky Injection Molding Systems S.A. Article moulé, insert de moule pour fabriquer l'article moulé et procédé de fabrication de l'insert de moule
US7745512B2 (en) 2005-09-16 2010-06-29 Eastman Chemical Company Polyester polymer and copolymer compositions containing carbon-coated iron particles
US7776942B2 (en) 2005-09-16 2010-08-17 Eastman Chemical Company Polyester polymer and copolymer compositions containing particles of titanium nitride and carbon-coated iron
US8039577B2 (en) 2004-11-12 2011-10-18 Grupo Petrotemex, S.A. De C.V. Polyester polymer and copolymer compositions containing titanium nitride particles
DE102010015019A1 (de) * 2010-04-14 2011-10-20 Krones Ag Vorformling und Verfahren zur Herstellung eines Vorformlings
WO2014146938A1 (fr) * 2013-03-19 2014-09-25 Sidel Participations Procede de realisation d'un recipient a partir d'une preforme comportant une portion a surchauffer comportant une couche de materiau susceptible d' etre surchauffe selectivement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8557950B2 (en) 2005-06-16 2013-10-15 Grupo Petrotemex, S.A. De C.V. High intrinsic viscosity melt phase polyester polymers with acceptable acetaldehyde generation rates
US9267007B2 (en) 2005-09-16 2016-02-23 Grupo Petrotemex, S.A. De C.V. Method for addition of additives into a polymer melt

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995990A (en) * 1974-03-11 1976-12-07 Monsanto Company Pre-form reheat oven for stretch blow molding machines
US4199629A (en) * 1977-10-25 1980-04-22 Monsanto Company Forming molecularly oriented containers from reheated preforms
US4204111A (en) * 1977-10-19 1980-05-20 Monsanto Company Heating improvements in a preform reheat system
DE3823670A1 (de) * 1988-07-13 1990-10-25 Nissei Asb Machine Co Ltd Verfahren und vorrichtung zum erwaermen von vorformlingen
US5308233A (en) * 1992-05-20 1994-05-03 Sidel Thermal treatment unit for the manufacture of pet containers
US5312572A (en) * 1991-07-19 1994-05-17 Krupp Corpoplast Maschinenbau Gmbh Process for heating a blow molding preform
US5688466A (en) * 1994-10-19 1997-11-18 Constar Plastics, Inc. Alignment assembly for heating lamps of a blow molding apparatus and method of use
EP0842857A2 (fr) * 1996-11-15 1998-05-20 Beiersdorf Aktiengesellschaft Récipient et procédé pour sa fabrication
EP0860265A1 (fr) * 1997-02-17 1998-08-26 Nissei Asb Machine Co., Ltd. Procédé de moulage par soufflage de récipients résistants à la chaleur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5929130A (ja) * 1982-08-09 1984-02-16 Toyo Seikan Kaisha Ltd 飽和ポリエスボトルの製造方法
JPS6073830A (ja) * 1983-09-30 1985-04-26 Katashi Aoki 偏平または角形びんなどの容器のブロ−成形方法
JPH06134843A (ja) * 1992-10-29 1994-05-17 Mitsubishi Plastics Ind Ltd 合成樹脂製ボトルの製造方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995990A (en) * 1974-03-11 1976-12-07 Monsanto Company Pre-form reheat oven for stretch blow molding machines
US4204111A (en) * 1977-10-19 1980-05-20 Monsanto Company Heating improvements in a preform reheat system
US4199629A (en) * 1977-10-25 1980-04-22 Monsanto Company Forming molecularly oriented containers from reheated preforms
DE3823670A1 (de) * 1988-07-13 1990-10-25 Nissei Asb Machine Co Ltd Verfahren und vorrichtung zum erwaermen von vorformlingen
US5312572A (en) * 1991-07-19 1994-05-17 Krupp Corpoplast Maschinenbau Gmbh Process for heating a blow molding preform
US5308233A (en) * 1992-05-20 1994-05-03 Sidel Thermal treatment unit for the manufacture of pet containers
US5688466A (en) * 1994-10-19 1997-11-18 Constar Plastics, Inc. Alignment assembly for heating lamps of a blow molding apparatus and method of use
EP0842857A2 (fr) * 1996-11-15 1998-05-20 Beiersdorf Aktiengesellschaft Récipient et procédé pour sa fabrication
EP0860265A1 (fr) * 1997-02-17 1998-08-26 Nissei Asb Machine Co., Ltd. Procédé de moulage par soufflage de récipients résistants à la chaleur

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 124 (M-301), 9 June 1984 (1984-06-09) & JP 59 029130 A (TOUYOU SEIKAN KK), 16 February 1984 (1984-02-16) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 215 (M-409), 3 September 1985 (1985-09-03) & JP 60 073830 A (KATASHI AOKI), 26 April 1985 (1985-04-26) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 438 (M-1656), 16 August 1994 (1994-08-16) & JP 06 134843 A (MITSUBISHI PLASTICS IND LTD), 17 May 1994 (1994-05-17) *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7189777B2 (en) 2003-06-09 2007-03-13 Eastman Chemical Company Compositions and method for improving reheat rate of PET using activated carbon
US7662880B2 (en) 2004-09-03 2010-02-16 Eastman Chemical Company Polyester polymer and copolymer compositions containing metallic nickel particles
US8039577B2 (en) 2004-11-12 2011-10-18 Grupo Petrotemex, S.A. De C.V. Polyester polymer and copolymer compositions containing titanium nitride particles
US7745512B2 (en) 2005-09-16 2010-06-29 Eastman Chemical Company Polyester polymer and copolymer compositions containing carbon-coated iron particles
US7776942B2 (en) 2005-09-16 2010-08-17 Eastman Chemical Company Polyester polymer and copolymer compositions containing particles of titanium nitride and carbon-coated iron
EP2173531A1 (fr) * 2007-07-05 2010-04-14 Husky Injection Molding Systems S.A. Article moulé, insert de moule pour fabriquer l'article moulé et procédé de fabrication de l'insert de moule
EP2173531A4 (fr) * 2007-07-05 2010-06-30 Husky Injection Molding Article moulé, insert de moule pour fabriquer l'article moulé et procédé de fabrication de l'insert de moule
DE102010015019A1 (de) * 2010-04-14 2011-10-20 Krones Ag Vorformling und Verfahren zur Herstellung eines Vorformlings
WO2014146938A1 (fr) * 2013-03-19 2014-09-25 Sidel Participations Procede de realisation d'un recipient a partir d'une preforme comportant une portion a surchauffer comportant une couche de materiau susceptible d' etre surchauffe selectivement
FR3003505A1 (fr) * 2013-03-19 2014-09-26 Sidel Participations "procede de realisation d'un recipient a partir d'une preforme comportant une portion a surchauffer comportant une couche de materiau susceptible d'etre surchauffe selectivement"

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