EP1960180A1 - Procede de post-traitement et dispositif approprie - Google Patents

Procede de post-traitement et dispositif approprie

Info

Publication number
EP1960180A1
EP1960180A1 EP06830152A EP06830152A EP1960180A1 EP 1960180 A1 EP1960180 A1 EP 1960180A1 EP 06830152 A EP06830152 A EP 06830152A EP 06830152 A EP06830152 A EP 06830152A EP 1960180 A1 EP1960180 A1 EP 1960180A1
Authority
EP
European Patent Office
Prior art keywords
receiving cavity
preform
fluid
pin
aftertreatment
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.)
Withdrawn
Application number
EP06830152A
Other languages
German (de)
English (en)
Inventor
Witold Neter
Helmut THÖMMES
Christian Wagner
Rainer Petry
Stefan Schweininger
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.)
MHT Mold and Hotrunner Technology AG
Original Assignee
MHT Mold and Hotrunner Technology AG
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 MHT Mold and Hotrunner Technology AG filed Critical MHT Mold and Hotrunner Technology AG
Publication of EP1960180A1 publication Critical patent/EP1960180A1/fr
Withdrawn legal-status Critical Current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
    • B29C49/4205—Handling means, e.g. transfer, loading or discharging means
    • B29C49/42065—Means specially adapted for transporting preforms
    • 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
    • B29C35/16—Cooling
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/7207—Heating or cooling of the moulded 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • B29C2035/1658—Cooling using gas
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/7207—Heating or cooling of the moulded articles
    • B29C2045/7214—Preform carriers for cooling preforms
    • 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
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step 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
    • 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
    • B29C2949/074—Preforms or parisons characterised by their configuration having ribs or protrusions
    • B29C2949/0744—Preforms or parisons characterised by their configuration having ribs or protrusions 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3008—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3012—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3016—Preforms or parisons made of several components 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/302—Preforms or parisons made of several components 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3064—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3064—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062
    • B29C2949/3074—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating
    • B29C2949/308—Preforms or parisons made of several components having at least one components being applied using techniques not covered by B29C2949/3032 - B29C2949/3062 said at least one component obtained by coating by dip coating
    • 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
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • 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
    • B29C49/4205—Handling means, e.g. transfer, loading or discharging 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
    • B29C49/4205—Handling means, e.g. transfer, loading or discharging means
    • B29C49/42093—Transporting apparatus, e.g. slides, wheels or conveyors
    • B29C49/42105—Transporting apparatus, e.g. slides, wheels or conveyors for discontinuous or batch transport
    • 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
    • B29C49/4242—Means for deforming the parison prior to the blowing operation
    • B29C49/42421—Means for deforming the parison prior to the blowing operation before laying into 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
    • 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
    • B29C49/4242—Means for deforming the parison prior to the blowing operation
    • B29C49/42421—Means for deforming the parison prior to the blowing operation before laying into the mould
    • B29C49/42428—Means for deforming the parison prior to the blowing operation before laying into the mould in a separate pre-moulding station
    • 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
    • B29C49/6427—Cooling of preforms
    • 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
    • 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
    • B29C49/645—Thermal conditioning of preforms characterised by temperature differential through the preform length by cooling the neck
    • 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
    • B29C49/681—Ovens specially adapted for heating preforms or parisons using a conditioning receptacle, e.g. a cavity, e.g. having heated or cooled regions
    • 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
    • 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 relates to a process for the aftertreatment of a molded article produced in an injection mold.
  • Injection molding is one of the most important processes for the production of molded parts.
  • the molding compound which generally is originally present as powder or granulate, is heated, plasticized and forced under high pressure (several 100 bar) into a corresponding molding tool. The molding compound solidifies in the mold and is then removed from the opened tool.
  • commercial PET bottles are generally made by stretch blow molding a hollow body preform or hollow preform.
  • the hollow body preform is produced in a first step by means of injection molding.
  • the stretch blow molding subsequent to the injection molding operation can be carried out either immediately after production of the hollow body preform or at a later time.
  • the preform is generally transferred to a so-called receiving plate, which consists of a group of receiving cavities. So it is, for example, in the so-called vertical tools, ie those injection molds that open by a vertical movement of a tool part relative to the other, usual, the tool shape already after z. B.
  • a gripper unit is retracted into the opened injection mold to grip the preforms and transfer them into the receiving cavities.
  • the preform for cooling in the receiving cavity of the prior art must remain a relatively long time, so that usually already the next preform can be removed from the injection mold before the preform is cooled in the receiving cavity so far that he without the risk damage can be taken, it is already common to use receiving plates having a plurality of groups of receiving cavities, each group having as many receiving cavities, as the injection mold preforms per injection cycle provides. The individual receiving cavities are then successively populated with preforms, so that the individual preform can remain longer than one injection cycle in the receiving cavity.
  • the stated object is achieved by a method for the aftertreatment of a molded article produced in an injection mold, in which the shaping from the injection mold is transferred to a receiving element, wherein the shaping is held at least temporarily essentially without contact by the receiving element.
  • the receiving element may be a receiving cavity having an open and a closed end, the inner shape substantially corresponding to the outer shape of the molding, wherein the molding is at least temporarily held in the receiving cavity such that the molding does not completely penetrate into the receiving cavity, so that a large part of the outer surface of the molding does not touch the inner surface of the receiving cavity.
  • the preform By not contacting the outer surface of the molding with the receiving cavity, the preform can be transferred in a state where the surfaces of the preform are still relatively soft. In this condition, contact between the preform and the receiving cavity could result in irreversible damage to the preform.
  • a fluid preferably by means of a gaseous fluid, which is introduced through an opening preferably in the vicinity of the closed end of the receiving cavity in this, prevented from coming into contact with the inner surface of the receiving cavity.
  • compressed air is introduced at the lower end of the receiving cavity, which prevents the molding from completely penetrating the receiving cavity, since it then closes the receiving cavity due to the substantial conformity of the outer shape of the molding with the inner shape of the receiving cavity would.
  • the pressure generated by the introduced compressed air would immediately raise the shaping again a little bit from the receiving capacity. It thus forms between receiving cavity on the one hand and shaping on the other hand, an air layer, which could also be referred to as air cushion.
  • the shaping therefore floats above the receiving cavity and is held substantially solely by the air cushion.
  • any direct contact is not desired. Nevertheless, during the transfer of the molded article from the tool into the receiving cavity or even during the aftertreatment of the molded article in the receiving cavity, there may be brief contact between the molded article and the receiving cavity. Although this is not desirable in principle, they still do not question the method according to the invention, since they only take place for a short time and, since the air cushion acts as a buffer, only with little force. In principle, the compressed air introduced through the opening into the receiving cavity, which flows along the outer surface of the molding, prevents complete penetration of the molding into the receiving cavity.
  • the receiving cavity has a feed opening for the corresponding fluid.
  • the aftertreatment is particularly advantageous when a plurality of openings through which the fluid is supplied, are present.
  • an aftertreatment pin the outer surface of which at least partially coincides approximately with the inner shape of a cavity within the molding, is moved into the molding cavity.
  • This post-treatment pen is intended for the post-treatment of the inner surface of the molding.
  • a fluid preferably a gaseous fluid
  • the molding cavity can be cooled.
  • fluid is introduced into the mold cavity during the movement of the aftertreatment post into the mold cavity, so that the molding is introduced by the outflowing fluid and substantially - -
  • the fluid is introduced through a plurality of openings, preferably via a porous element in the post-treatment pen in the molding.
  • the entire post-treatment pen may be made of a porous material.
  • the molding is at least partially heated within the receiving cavity. It has been found that the quality of the molded article changes with regard to its physical or mechanical properties as a function of the speed and the uniformity of the cooling process. In order to prevent too rapid cooling of the surfaces of the molding, it may therefore be advantageous if the molding is heated at least in sections on its surface until the interior of the molding material, the so-called soul has also cooled to a certain temperature. In addition, depending on further planned processing steps, it may be advantageous if the shaped article, in particular in the form of a preform, is reheated after cooling, in order, for example, to permit further treatment by stretch blow molding. Furthermore, it may be expedient if the molding is cooled at least in sections within the receiving cavity.
  • the object mentioned at the outset is achieved, in particular, by a method which has the following steps:
  • step b) introducing the preform into a receiving cavity whose inner surface approximately corresponds to the outer surface of the preform, b) introducing a fluid into the receiving cavity via an opening in the vicinity of the closed end of the receiving cavity, c) forming a fluid cushion between preform and receiving cavity, d) holding the preform in suspension without significant direct contact between preform and receiving cavity. It is also possible and, for some applications, to carry out step b) during step a). Thus, it is already possible to prevent contact between the preform on the one hand and the receiving cavity during transfer of the preform from the tool mold into the receiving cavity.
  • an aftertreatment pin is introduced into the preform whose outer contour substantially corresponds to the inner contour of the preform (Steps).
  • the aftertreatment pin retreads the inner contour of the preform, i. either reshaped or postcooled or possibly even heated.
  • the treatment pin has one or more openings at its tip and / or at its side surfaces and fluid flows out of the one or more openings of the aftertreatment pin when the aftertreatment pin is immersed in the preform. It is particularly expedient if a fluid cushion is also formed between the outer surface of the aftertreatment pin and the inner surface, so that the preform is pressed into the receiving cavity substantially solely via the fluid cushion without significant direct contact between preform and aftertreatment pin (step f).
  • the surface of the preform can still be so soft in this process that through the
  • Fluid pad it comes to a surface smoothing. This is particularly advantageous in the lower region of the preform, that is to say on the outer side of its closed end, since unevenness in the preform is frequently present here due to the injection point or the gate. By the fluid cushion and this unevenness can be eliminated, so that the injection point in the finished inflated bottle is virtually unrecognizable.
  • the aftertreatment pin is finally moved into the receiving cavity so far that the outer preform wall comes into contact with the inner wall of the receiving cavity (step g). At that moment, the preform gets its final shape. It is possible in this case that the inner wall of the preform comes into contact with the outer surface of the post-treatment pin. However, this is not essential. The best results were obtained in tests when only contact between preform and receiving cavity but not between preform and aftertreatment pen.
  • the molding step i. the moment in which the aftertreatment document is completely inserted into the receiving cavity, lasting less than 2 seconds, preferably less than 1 second, more preferably less than 500 milliseconds. Then the preform has its final shape and the aftertreatment pin is now moved out of the receiving cavity again.
  • the preform can now either be removed from the receiving cavity or it can be transferred back into the "floating" state already described above, in which a controlled cooling of the preform is effected due to the fluid.Of course, it is also possible that the preform remains in contact with the receiving cavity on its outside.
  • the supply of fluid is interrupted at the moment in which the outer preform wall comes into contact with the inner wall of the receiving cavity.
  • Step f) or g) that is compressed in its axial length during the movement of the Nach aspectslixes into the receiving cavity of the preform.
  • T 1 is greater, preferably greater by at least 10 ° C and more preferably at least 20 ° C greater than T 2 .
  • the warmer portion could be located closer to the neck portion of the preform than the colder portion. This has the consequence that the preform cools relatively quickly in its lower region, so that the upsetting of the preform along its axial length substantially in the warmer portion which is located closer to the neck portion, takes place.
  • this section will have a slightly higher wall thickness than the lower section of the preform.
  • Such an uneven thickness of the preform may be desirable if the bottle to be produced in a further process step should have reinforcing ribs in a certain area, so that an increased amount of material is required in this area.
  • the wall thickness is the criterion determining the cycle time, so that an increase in the wall thickness of the preform in the mold always results in an extension of the cycle time draws.
  • the procedure according to the invention it is possible to give the preform finally an increased wall thickness, without causing an extension of the cycle time.
  • the aftertreatment pin is advantageously designed such that it closes the preform in a substantially sealing manner when the position is moved completely into the receiving cavity.
  • the aftertreatment pen following the inward movement of the aftertreatment pen, the aftertreatment pen is again moved out of the receiving cavity, a fluid is supplied through the opening of the receiving cavity, and the aftertreatment pen is connected to a vacuum source so that the preform engages the aftertreatment pen from the receiving cavity emotional.
  • a sleeve element is provided which surrounds the preform in the threaded section and the sleeve element is connected after the post-treatment with a vacuum source to remove the preform from the receiving cavity.
  • a stretching rod as used in blow molding
  • the preform is introduced, the preform by means of the stretching rod and a vacuum applied in an opening in the stretch rod, is removed from the receiving cavity and finally the stretching rod together with preform is placed in a die and the preform is stretched in the die and inflated to a PET bottle or other object to form.
  • the object mentioned is achieved by a system for the aftertreatment of a molded article produced in an injection mold, in which a holding device is provided for substantially non-contact holding of the molded article.
  • the holding means on a receiving cavity having a closed and an open end for receiving the molding, wherein the inner shape of the receiving cavity is adapted so that it corresponds substantially to the outer shape of the male molding, and the shaping in the Cavity is held such that the majority of the outer surface of the molding does not come into contact with the inner surface of the receiving cavity.
  • the holding device ensures a distance between the outside of the molding and the inner surface of the receiving cavity between about 1 mm to about 5 mm.
  • the holding device is formed by at least one opening in the receiving cavity, which is connectable to a fluid supply. If a fluid is supplied via the opening in the receiving cavity, the fluid ensures that the shaping can not penetrate completely into the receiving cavity and therefore also does not touch the inner surface of the receiving cavity. The holding of the molding is thus carried out by the supplied fluid without the need for a direct physical contact between the molding andrackavtician.
  • the at least one opening in the receiving cavity is preferably arranged in the vicinity of the closed end.
  • the receiving cavity is at least partially formed of porous material.
  • a cooling device is provided for cooling the receiving cavity and / or the fluid to be supplied.
  • a heating device for heating the receiving cavity and / or the fluid to be supplied can also be provided.
  • an aftertreatment pen which can be moved into the receiving cavity.
  • the post-treatment pin has at least one opening, preferably in the region of its tip, which can be connected to a fluid supply, wherein the post-treatment pin preferably consists of a porous material.
  • the aftertreatment pen in a preferred embodiment, is designed to push a forming farther into the receiving cavity without substantial contact between the post-treatment pen and the forming. This pushing in takes place solely on account of the fluid cushion, which necessarily forms through the supply of the fluid through the opening in the aftertreatment pen between aftertreatment pen on the one hand and shaping on the other hand.
  • a cooling device is provided for cooling the post-treatment pin and / or the fluid to be supplied by the post-treatment pin.
  • a heating device for heating the post-treatment pin and / or the fluid to be supplied through this can also be provided.
  • the system according to the invention is preferably designed to hold the shaping at least temporarily essentially exclusively by the fluid supplied by means of the receiving cavity on the one hand and the aftertreatment pen on the other hand.
  • the system described is particularly advantageous in the after-treatment of preforms, which are subsequently inflated to corresponding bottles or other objects.
  • the receiving cavity expediently has a ring element with preferably conically widening inner or outer surface which surrounds the open end of the receiving cavity.
  • a sleeve element is preferably provided, which surrounds the aftertreatment pin and is particularly preferably designed such that the sleeve element comes into contact with the neck section of the preform to be post-treated when the aftertreatment pin moves completely into the receiving cavity.
  • the ring element of the receiving cavity and the sleeve element of the adjacent post-treatment pin are formed with mutually corresponding preferably conically widening surfaces which upon immersion of the post-treatment pin in the receiving cavity contact each other and ensure a centering of the post-treatment pin with respect to the receiving cavity.
  • FIGS. 1 to 4 each show a snapshot of the method according to the invention.
  • a receiving cavity 1 is shown having a lower, closed end and an upper, open end.
  • a cooling channel 2 is arranged, which allows cooling of the receiving cavity, for example by means of cooling water.
  • the bottom of the receiving cavity 1 is formed by a porous insert 3.
  • the receiving cavity is provided for receiving a preform 5, which has been schematically drawn here.
  • the preform 5 has a threaded portion 6, a neck ring 7 and a lower portion 13.
  • the outer surface of the lower portion 13 of the preform 5 substantially corresponds to the inner surface of the receiving cavity 1.
  • To remove the preform 5 from the mold it is first opened and then retracted a plate with corresponding receiving cavities in the mold.
  • the preform 5 is then transferred to the receiving cavity 1. Due to the air flow 12 generated by the compressed air applied to the feeder 4, the preform 5 is held in suspension, so that it has almost no contact with the inner surface of the receiving cavity 1.
  • the air flow is shown schematically in Figure 1 by arrows.
  • the receiving cavity 1 is moved out after the transfer of the preform 5 in the receiving cavity 1 from the mold. This can now be used to produce another preform 5. Meanwhile, an aftertreatment pin 9 is placed in the preform. This condition is shown in FIG. It can be clearly seen that the preform does not touch either the receiving cavity 1 or the aftertreatment pen 9.
  • the aftertreatment pin 9 is also made of porous material and with a corresponding supply for a fluid, eg. B. compressed air connected. It thus forms between the post-treatment pin 9 and the preform 5, an air cushion.
  • the preform 5 can be treated.
  • the supplied fluid can be tempered accordingly. This tempering can be done for example by means of a resistance heater, for example in the form of a heating coil.
  • the course of the fluid flow 12 is also indicated here by arrows.
  • FIG. 3 the step of final formation of the shape of the preform is shown.
  • the post-treatment pen 9 is inserted as far as possible into the receiving cavity 1 for a short moment.
  • the preform 5 does not touch the inner wall of the receiving cavity 1, but not the outer wall of the post-treatment pin 9.
  • the post-treatment pin 9 is equipped with a sleeve element 10.
  • Arranged annularly around the receiving cavity is a ring element 8.
  • the sleeve element 10 is designed so that it comes into contact with the neck ring 7 of the preform in the position shown in FIG.
  • the ring element 8 and the sleeve element 10 are each provided with conical surfaces which correspond to one another in such a way that they come into contact with one another in the position shown in FIG. 3 and ensure centering of the aftertreatment pin 9 within the receiving cavity 1.
  • the upper edge of the preform 5 comes into contact with the sleeve bottom 11 of the sleeve member 10, so that around the threaded portion 6 of the preform 5 between the preform on the one hand and the surrounding sleeve member 10 on the other hand forms a closed chamber. If necessary, this closed chamber can be connected to a vacuum source in order to remove the preform 5 from the receiving cavity 1 in a further step.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé permettant d'effectuer un post-traitement sur une ébauche (5) produite dans un moule de moulage par injection. Selon ledit procédé, l'ébauche est transférée, du moule de moulage par injection, à un élément de réception (1). L'invention vise à mettre au point un procédé de post-traitement d'ébauches produites dans des moules de moulage par injection, qui permette à la fois une sortie précoce hors de l'outil de moulage par injection et un post-traitement de l'ébauche, dans une large mesure non altérante. A cet effet, il est prévu que l'ébauche soit maintenue par l'élément de réception, au moins temporairement sans contact (12).
EP06830152A 2005-11-30 2006-11-28 Procede de post-traitement et dispositif approprie Withdrawn EP1960180A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510057465 DE102005057465A1 (de) 2005-11-30 2005-11-30 Nachbehandlungsverfahren sowie Vorrichtung hierfür
PCT/EP2006/069002 WO2007063063A1 (fr) 2005-11-30 2006-11-28 Procede de post-traitement et dispositif approprie

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EP1960180A1 true EP1960180A1 (fr) 2008-08-27

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DE (1) DE102005057465A1 (fr)
WO (1) WO2007063063A1 (fr)

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US7780884B2 (en) * 2007-08-20 2010-08-24 Husky Injection Molding Systems Ltd. Method for post-mold treatment of a molded article and an apparatus for implementing the method
DE102011007553A1 (de) * 2011-04-15 2012-10-18 Mht Mold & Hotrunner Technology Ag Kühlhülse mit Stützelement
CN103906612B (zh) 2011-11-09 2015-12-23 赫斯基注塑系统有限公司 后模制系统
DE102012111348A1 (de) 2012-11-23 2014-05-28 Krones Ag Streckblasverfahren sowie Streckblasmaschine
FR3004985A1 (fr) * 2013-04-24 2014-10-31 Sidel Participations "procede de faconnage d'une preforme chaude par estampage et dispositif pour sa mise en oeuvre"
WO2024158808A1 (fr) * 2023-01-24 2024-08-02 Adler Industrial Solutions, Inc. Outillage de station de conditionnement

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JPH0790595B2 (ja) * 1990-10-15 1995-10-04 日精エー・エス・ビー機械株式会社 プリフォームの冷却装置
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DE102005057465A1 (de) 2007-05-31

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