KR960705669A - METHOD OF FORMING MOLECULARLY ORIENTED CONTAINERS - Google Patents

METHOD OF FORMING MOLECULARLY ORIENTED CONTAINERS

Info

Publication number
KR960705669A
KR960705669A KR1019960702182A KR19960702182A KR960705669A KR 960705669 A KR960705669 A KR 960705669A KR 1019960702182 A KR1019960702182 A KR 1019960702182A KR 19960702182 A KR19960702182 A KR 19960702182A KR 960705669 A KR960705669 A KR 960705669A
Authority
KR
South Korea
Prior art keywords
preform
temperature
mold
closed
thickness
Prior art date
Application number
KR1019960702182A
Other languages
Korean (ko)
Inventor
프란쯔 기트너
우베-볼커 로스
스콧 더블류. 스틸레
Original Assignee
고트프리트 매너트
베쿰 마쉬넨파브리켄 게엠베하
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 고트프리트 매너트, 베쿰 마쉬넨파브리켄 게엠베하 filed Critical 고트프리트 매너트
Priority claimed from PCT/EP1994/003525 external-priority patent/WO1995011791A2/en
Publication of KR960705669A publication Critical patent/KR960705669A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06Injection blow-moulding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42Component parts, details or accessories; Auxiliary operations
    • B29C49/64Heating or cooling preforms, parisons or blown articles
    • B29C49/6472Heating or cooling preforms, parisons or blown articles in several stages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42Component parts, details or accessories; Auxiliary operations
    • B29C49/64Heating or cooling preforms, parisons or blown articles
    • B29C49/6604Thermal conditioning of the blown article
    • B29C49/6605Heating the article, e.g. for hot fill
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42Component parts, details or accessories; Auxiliary operations
    • B29C49/64Heating or cooling preforms, parisons or blown articles
    • B29C49/68Ovens specially adapted for heating preforms or parisons
    • B29C49/6835Ovens specially adapted for heating preforms or parisons using reflectors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822Heating 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/0715Preforms or parisons characterised by their configuration the preform having one end closed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/072Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0723Preforms or parisons characterised by their configuration having variable wall thickness at flange portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/072Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0724Preforms or parisons characterised by their configuration having variable wall thickness at body portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/073Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0732Preforms or parisons characterised by their configuration having variable diameter at flange portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/073Preforms or parisons characterised by their configuration having variable diameter
    • B29C2949/0733Preforms or parisons characterised by their configuration having variable diameter at body portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/076Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772Closure retaining means
    • B29C2949/0773Threads
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/076Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0777Tamper-evident band retaining ring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/079Auxiliary parts or inserts
    • B29C2949/08Preforms made of several individual parts, e.g. by welding or gluing parts together
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/081Specified dimensions, e.g. values or ranges
    • B29C2949/0811Wall thickness
    • B29C2949/0817Wall thickness of the body
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/07Preforms or parisons characterised by their configuration
    • B29C2949/081Specified dimensions, e.g. values or ranges
    • B29C2949/0811Wall thickness
    • B29C2949/0818Wall thickness of the bottom
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/20Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/20Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/20Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/20Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/30Preforms or parisons made of several components
    • B29C2949/3024Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00Indexing scheme relating to blow-moulding
    • B29C2949/30Preforms or parisons made of several components
    • B29C2949/3032Preforms or parisons made of several components having components being injected
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04Polymers of ethylene
    • B29K2023/06PE, i.e. polyethylene
    • B29K2023/0608PE, i.e. polyethylene characterised by its density
    • B29K2023/065HDPE, i.e. high density polyethylene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10Polymers of propylene
    • B29K2023/12PP, i.e. polypropylene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2027/00Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06PVC, i.e. polyvinylchloride
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2067/00Use of polyesters or derivatives thereof, as moulding material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25Solid
    • B29K2105/253Preform
    • B29K2105/258Tubular
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING 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
    • B29K2623/00Use of polyalkenes or derivatives thereof for preformed parts, e.g. for inserts
    • B29K2623/10Polymers of propylene
    • B29K2623/12PP, i.e. polypropylene

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

본 발명은 차후의 인장 취입 성형을 위한 부분적으로 결정체인 분자 배향이 가능한 플라스틱 재료로부터 사출 성형에 의해 형성된 일단이 개방된 전체적으로 원통형의 중공 예비 성형품으로부터 분자 배향 플라스틱용기를 성형하기 위한 방법에 관한 것이다. 용융된 재료는 사출 중 전개되는 잔류 응력과 분자 유동 배향을 최소화하기 위해 제어된 예정된 충전율로 예비 성형품의 주형 안으로 사출된다. 이 예비 성형품은 입간 구조가 결정 핵을 용해하지 않고 용해되는 온도까지 방사열 공급원에 의해 결정 용융점의 아래에서 재가열된다. 가열 영역의 기하학적인 구조로부터 초래되는 소위 에지 효과(edge effects)를 피하기 위해, 예비 성형품은 양 단부에서 두께가 감소한다. 그 다음에 예비 성형품은 그의 폐쇄 단부와 결합하는 로드에서 축방향으로 인장되는 주형으로 급속하게 이동된 다음 연마된 주형면에 대해 급속히 담금질된다.The present invention relates to a method for molding a molecularly oriented plastic container from a generally cylindrical hollow preform having one end opened by injection molding from a partially crystalline molecular orientation capable plastic material for subsequent tensile blow molding. The molten material is injected into the mold of the preform at a controlled predetermined fill rate to minimize residual stress and molecular flow orientation developed during injection. This preform is reheated below the crystal melting point by a radiant heat source to a temperature where the intergranular structure dissolves without dissolving the crystal nuclei. In order to avoid the so-called edge effects resulting from the geometry of the heating zone, the preform is reduced in thickness at both ends. The preform is then rapidly moved to an axially tensioned mold at the rod that engages its closed end and then rapidly quenched against the polished mold surface.

Description

분자 배향 용기의 성형 방법(METHOD OF FORMING MOLECULARLY ORIENTED CONTAINERS)METHOD OF FORMING MOLECULARLY ORIENTED CONTAINERS

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 예비 성형품의 종단면도이다. 제2도는 본 발명의 재가열 시스템의 일부를 상부에서 본 도식도이다.1 is a longitudinal sectional view of a preform according to the invention. 2 is a top view of a portion of the reheating system of the present invention.

Claims (33)

부분적으로 결정체인 분자 배향이 가능한 플라스틱 재료로부터 다음의 인장 취입 성형을 위한 일단이 폐쇄된 예비 성형품을 사출 성형하는 방법으로서, 상기 재료의 용융물이 예정된 충전율로 예비 성형품의 주형 공동으로 사출되는 분자 배향된 용기의 성형 방법에 있어서, 주형 속으로의 사출에 의해 상기 플라스틱 재료에서 전개된 잔류 응력과 유도된 분자 유동 배향을 최소화하기 위해 충전율을 제어하며, 상기 충전율은 약 3grams/sec. 내지 약 5grams/sec.인 것을 특징으로 하는 분자 배향된 용기의 성형 방법.A method of injection molding a pre-closed preform for the next tensile blow molding from a partially crystalline molecular material capable of molecular orientation, wherein the melt of material is injected into a mold cavity of the preform at a predetermined fill rate A method of forming a container, the filling rate being controlled to minimize residual stress and induced molecular flow orientation developed in the plastic material by injection into the mold, the filling rate being about 3 grams / sec. To about 5 grams / sec. 제1항에 있어서, 예비 성형품의 주형 안으로 사출한 후 약 4℃/sec. 내지 약 8℃/sec.의 냉각율로 급속 담금질하는 단계를 구비하는 것을 특징으로 하는 분자 배향된 용기의 성형 방법.The method of claim 1, wherein about 4 ° C./sec after injection into the mold of the preform. Rapid quenching at a cooling rate of from about 8 ° C./sec. 제1항에 있어서, 상기 부분적으로 결정체인 분자 배향이 가능한 플라스틱은 폴리프로필렌을 함유하는 폴리머인 것을 특징으로 하는 분자 배향된 용기의 성형 방법.The method of claim 1, wherein the partially crystalline, molecularly oriented plastic is a polymer containing polypropylene. 제3항에 있어서, 상기 부분적으로 결정체인 분자 배향이 가능한 플라스틱은 50중량%의 프로필렌보다 더 큰 프로필린/에틸렌 코폴리머인 것을 특징으로 하는 분자 배향된 용기의 성형 방법.4. The method of claim 3, wherein the partially crystalline molecular oriented plastic is a propyline / ethylene copolymer that is greater than 50% by weight propylene. 제4항에 있어서, 상기 것을 코폴리머는 약 2 내지 약 50의 멜트 유동 인덱스(melt flow index)를 갖는 것을 특징으로 하는 분자 배향된 용기의 성형 방법.The method of claim 4, wherein the copolymer has a melt flow index of about 2 to about 50. 6. 제4항에 있어서, 상기 코폴리머는 약 10 내지 약 30의 멜트 유동 인덱스를 갖는 것을 특징으로 하는 분자 배향된 용기의 성형 방법.The method of claim 4, wherein the copolymer has a melt flow index of about 10 to about 30. 6. 부분적으로 결정체인 분자 배향이 가능한 플라스틱 재료로부터 다음의 인장 취입 성형을 위한 일단이 폐쇄되고 타단이 개방된 전체적으로 원통형의 중공 예비 성형품을 사출 성형하는 방법으로서, 상기 재료의 용융물이 예비 성형품의 주형 공동으로 사출되는 분자 배향된 용기의 성형 방법에 있어서, 그 결과 나온 예비 성형품은 상기 예비 성형품의 폐쇄 단부와 개방 단부에서 두께가 감소하도록 상기 주형 공동을 형성하는 것을 특징으로 하는 분자 배향된 용기의 성형 방법.A method of injection molding an entirely cylindrical hollow preform with one end closed and the other open for the next tensile blow molding from a partially crystalline molecular material capable of molecular orientation, wherein the melt of material is transferred to the mold cavity of the preform. A method of forming a molecularly oriented container to be injected, the resulting preform forming the mold cavity such that the thickness decreases at the closed and open ends of the preform. 제7항에 있어서, 예비 성형품은 그의 개방 단부와 폐쇄 단부의 두께가 약 40 내지 70%사이에서 감소하도록 형성됨을 특징으로 하는 분자 배향된 용기의 성형 방법.8. The method of claim 7, wherein the preform is formed such that the thickness of its open and closed ends is reduced between about 40 and 70%. 제8항에 있어서, 예비 성형품은 그의 양 단부의 두께가 약 2 내지 4mm로 감소하도록 형성됨을 특징으로 하는 분자 배향된 용기의 성형 방법.The method of claim 8, wherein the preform is formed such that the thickness of both ends thereof is reduced to about 2 to 4 mm. 제9항에 있어서, 예비 성형품은 그의 양 단부의 두께가 약 3mm로 감소하도록 형성됨을 특징으로 하는 분자 배향된 용기의 성형 방법.10. The method of claim 9, wherein the preform is formed such that the thickness of both ends thereof is reduced to about 3 mm. 다음의 인장 취입 성형을 위한 부분적으로 결정체인 분자 배향이 가능한 플라스틱의 일단이 폐쇄된 예비성형품에 있어서, 상기 예비 성형품은 개방 단부와 폐쇄 단부 및 그 사이의 전체적으로 원통형인 중공 본체부를 구비하며, 상기 본체부의 두께는 상기 개방 단부와 상기 폐쇄 단부에서 감소하는 것을 특징으로 하는 예비 성형품.A preform in which one end of a partially crystalline, molecularly oriented plastic is closed for subsequent blow blow molding, said preform having an open end and a closed end and a generally cylindrical hollow body therebetween, said body The thickness of the portion decreases at the open end and the closed end. 제11항에 있어서, 상기 부분적으로 결정체인 분자 배향이 가능한 플라스틱은 폴리플로필렌을 함유하는 폴리머인 것을 특징으로 하는 예비 성형품.12. The preform of claim 11 wherein the partially crystalline molecularly oriented plastic is a polymer containing polyflopropylene. 제12항에 있어서, 상기 부분적으로 결정체인 분자 배향이 가능한 플라스틱은 50중량%의 프로필렌보다 더 큰 프로필렌/에틸린 코폴리머인 것을 특징으로 하는 예비 성형품.13. The preform of claim 12 wherein the partially crystalline molecularly oriented plastic is a propylene / ethylen copolymer greater than 50% by weight propylene. 제11항에 있어서, 상기 예비 성형품은 그의 개방 단부와 폐쇄 단부의 두께가 약 40 내지 70% 사이에서 감소하도록 형성됨을 특징으로 하는 예비 성형품.The preform according to claim 11, wherein the preform is formed such that the thickness of its open and closed ends is reduced between about 40 to 70%. 상기 예비 성형품을 인장 취입 성형하여 성형된 분자 배향 용기를 제조하기 전에 폐쇄 단부와 개방 단부를 가지며 부분적으로 결정체인 분자 배향이 가능한 플라스틱으로 형성된 전체적으로 원통형의 중공 예비 성형품을 재가열하는 방법에 있어서, 1) 입간 구조가 용해하기 시작하며 상기 예비 성형품의 외측 표면 부근의 모든 결정 구조가 용해되는 온도에 접근하지만 이 온도를 초과하지 않는 온도까지 상기 예비 성형품의 외측 표면 부근의 온도를 상승시키기에 충분한 시간동안 상기 예비 성형품을 방사열 공급원에 노출하며; 2) 상기 예비 성형품의 외부에 대해 냉각가스를 향하게 하며; 3) 상기 단계 1)과 2)를 적어도 한번 더 반복하는 단계들을 구비하는 것을 특징으로 하는 예비 성형품 재가열 방법.1) A method of reheating a generally cylindrical hollow preform formed of a plastic having a closed end and an open end and capable of partially crystalline molecular orientation prior to tensile blow molding the preform to produce a molded molecular orientation container. The interlaminar structure begins to dissolve and for a time sufficient to raise the temperature near the outer surface of the preform to a temperature approaching but not exceeding the temperature at which all crystal structures near the outer surface of the preform melt. Exposing the preform to a radiant heat source; 2) direct cooling gas to the outside of the preform; 3) repeating steps 1) and 2) at least once more. 제15항에 있어서, 상기 단계 3)의 다음에, 상기 예비 성형품은 예비 성형품의 인장 취입 성형을 위해 원하는 최종 온도로 유지된 대류식 오븐으로 이동되는 것을 특징으로 하는 예비 성형품 재가열 방법.16. The method according to claim 15, wherein after the step 3), the preform is moved to a convection oven maintained at the desired final temperature for tensile blow molding of the preform. 제15항에 있어서, 상기 단계 1)중에 냉각가스가 상기 예비 성형품으로 향하는 것을 특징으로 하는 예비 성형품 재가열 방법.16. The method according to claim 15, wherein the cooling gas is directed to the preform during step 1). 제17항에 있어서, 상기 단계 1)중 상기 예비 성형품으로 향한 냉각가스의 속도는 상기 단계 2)중 상기 예비 성형품으로 향한 냉각가스의 속도보다 낮은 것을 특징으로 하는 예비 성형품의 재가열 방법.18. The method of claim 17, wherein the rate of cooling gas directed to the preform in step 1) is lower than the rate of cooling gas directed to the preform in step 2). 제18항에 있어서, 상기 단계 1)과 2)중 상기 예비 성형품으로 향한 냉각가스는 주위 온도의 공기로 이루어지는 것을 특징으로 하는 예비 성형품의 재가열 방법.19. The method of claim 18, wherein the cooling gas directed to the preform in steps 1) and 2) comprises air at ambient temperature. 제15항에 있어서, 상기 방사열 공급원은 강도가 높은 관형상의 석영 IR가열기의 어레이인 것을 특징으로 하는 예비 성형품의 재가열 방법.16. The method of claim 15, wherein said radiant heat source is an array of high strength tubular quartz IR heaters. 제20항에 있어서, 상기 예비 성형품은 약 1.2 내지 1.6 미크론의 파장의 적외선 에너지에 노출되는 것을 특징으로 하는 예비 성형품의 재가열 방법.21. The method of claim 20, wherein the preform is exposed to infrared energy at a wavelength of about 1.2 to 1.6 microns. 제15항에 있어서, 상기 예비 성형품은 예비 성형품의 벽을 통해 결정 핵의 용해를 최소화하는 온도로 가열되는 것을 특징으로 하는 예비 성형품의 재가열 방법.16. The method of claim 15, wherein the preform is heated through a wall of the preform to a temperature that minimizes dissolution of crystal nuclei. 제15항에 있어서, 상기 예비 성형품은 개방 단부와 폐쇄 단부 및 그 사이의 전체적으로 원통형인 중공본체부를 구비하며, 상기 본체부의 두께는 상기 개방 단부와 상기 페쇄 단부에서 감소하는 것을 특징으로 하는 예비 성형품의 재가열 방법.The preform according to claim 15, wherein the preform has an open end and a closed end and a generally cylindrical hollow body therebetween, the thickness of the body part being reduced at the open end and the closed end. Reheat method. 제15항에 있어서, 상기 예비 성형품은 콘베이어 상에 장착되고 상기 콘베이어의 길이를 따라 간격진 일련의 IR 가열 패널을 통과하는 것을 특징으로 하는 예비 성형품의 재가열 방법.16. The method of claim 15, wherein the preform passes through a series of IR heating panels mounted on the conveyor and spaced along the length of the conveyor. 제24항에 있어서, 상기 예비 성형품은 콘베이어 상에 장착되고 상기 콘베이어의 길이를 따라 간격진 일련의 3개의 IR 가열 패널을 통과하며, 상기 예비 성형품이 처음 노출되는 가열 패널을 상기 가열 패널들 중 적어도 하나에 설정되는 동력보다 더 높은 동력으로 설정되는 것을 특징으로 하는 예비 성형품의 재가열 방법.25. The apparatus of claim 24, wherein the preform passes through a series of three IR heating panels mounted on the conveyor and spaced along the length of the conveyor, wherein the preform is initially exposed to at least one of the heating panels. A method for reheating a preform, characterized in that the power is set higher than the power set in one. 제15항에 있어서, 상기 예비 성형품이 방사 에너지 공급원에 노출되는 동안 상기 예비 성형품에 각 회전이 부과되는 것을 특징으로 하는 예비 성형품의 재가열 방법.16. The method of claim 15, wherein each rotation is imposed on the preform while the preform is exposed to a radiant energy source. 제26항에 있어서, 상기 예비 성형품에는 방사 에서지 공급원에 노출되기 전 각 회전이 제공되는 것을 특징으로 하는 예비 성형품의 재가열 방법.27. The method of claim 26, wherein the preform is provided with each rotation prior to exposure to a spin edge source. 페쇄 단부와 개방 단부를 가지며 부분적으로 결정체인 분자 배향이 가능한 플라스틱으로 형성된 전체적으로 원통형의 중공 예비 성형품을 형성하며, 상기 예비 성형품을 재가열하고, 또 성형된 분자 배향 용기를 제조하기 위해 주형에 일치하기 상기 예비 성형품을 인장 취입 성형하는 방법에 있어서, 1) 상기 예비 성형품을 사출 성형하는 단계; 2) 상기 예비 성형품을 그의 결정 용융점 아레의 균일한 온도로 냉각하는 단계; 3) 동시에, ⅰ) 상기 예비 성형품을 방사열 공급원을 포함하는 가열 영역을 통과시키고; ⅱ) 상기 예비 성형품이 상기 가열 영역 내에 있는 동안 상기 예비 성형품에 각 회전을 부과하고; ⅲ)상기 예비 성형품내의 모든 결정 구조의 용해를 일으키는 온도 아래의 온도의 가스를 상기 예비 성형품의 외부 표면에 직접 향하게 하는 단계; 4) 상기 예비 성형품을 성형 영역으로 급속히 이동하여 상기 예비 성형품을 상기 주형 내에 유지하는 단계; 5) 상기 예비 성형품을 예비 성형품의 페쇄 단부와 결합하는 내장 인장 로드로 축방향으로 인장하는 단계; 및 6) 상기 예비 성형품을 팽창시켜 상기 주형과 일치시키기에 충분한 압력차를 형성하는 단계를 구비하는 것을 특징으로 하는 방법.Forming a generally cylindrical hollow preform formed of a plastic having a closed end and an open end and partly crystalline molecular orientation, reheating the preform and conforming to the mold to produce a molded molecular orientation container. 1. A method of tensile blow molding a preform, comprising: 1) injection molding the preform; 2) cooling the preform to a uniform temperature of its crystal melting point arene; 3) at the same time, i) passing the preform through a heating zone comprising a radiant heat source; Ii) imposing each rotation on the preform while the preform is in the heating zone; Iii) directing a gas at a temperature below the temperature causing dissolution of all crystal structures in the preform directly to the outer surface of the preform; 4) rapidly moving the preform into a molding region to maintain the preform in the mold; 5) axially tensioning the preform with a built-in tension rod that engages the closed end of the preform; And 6) expanding the preform to form a pressure differential sufficient to match the mold. 제28항에 있어서, 상기 예비 성형품에는 상기 가열 영역으로 이동되기 전에 각 회전이 제공되는 것을 특징으로 하는 방법.29. The method of claim 28, wherein the preform is provided with each rotation before being moved to the heating zone. 제28항에 있어서, 상기 단계 4) 이전에, 상기 예비 성형품을 상기 방사가열 영역으로부터 제거하고 상기 예비 성형품의 모든 결정 구조의 용해를 일으키는 온도 아래의 온도에서 냉각가스를 상기 예비 성형품의 외부표면으로 향하게 하는 단계를 구비하는 것을 특징으로 하는 방법.29. The method of claim 28, wherein prior to step 4), the cooling gas is brought to the outer surface of the preform at a temperature below the temperature that removes the preform from the radiant heating zone and causes dissolution of all crystal structures of the preform. Directing the method. 제30항에 있어서, 상기 단계 3)을 반복한 다음, 상기 단계 4) 이전에, 상기 예비 성형품을 상기 방사가열 영역으로부터 제거하고 상기 예비 성형품의 모든 결정 구조의 용해를 일으키는 온도 아래의 온도에서 냉각가스를 상기 예비 성형품의 외부 표면으로 향하게 하는 단계를 구비하는 것을 특징으로 하는 방법.31. The method of claim 30, wherein the step 3) is repeated, and before step 4), the preform is removed from the radiant heating zone and cooled at a temperature below the temperature that causes dissolution of all crystal structures of the preform. Directing gas to the outer surface of the preform. 제31항에 있어서, 상기 예비 성형품의 입간 구조가 용해되지만, 상기 예비 성형품의 모든 결정 구조가 용해되지 않는 온도로 설정된 대류 템퍼링 오븐 안으로 상기 예비 성형품을 도입하며, 상기 예비 성형품의 두께를 가로질러 전재된 모든 온도 변화도를 열전도에 의해 실질적으로 평준화시키며, 다음에 상기 단계 4)에서 상기 예비 성형품을 상기 성형 영역으로 이동시키는 단계를 구비하는 것을 특징으로 하는 방법.32. The method of claim 31 wherein the preform is introduced into a convective tempering oven set at a temperature at which the intergranular structure of the preform melts, but not all crystal structures of the preform dissolve and are transcribed across the thickness of the preform. And substantially leveling out all the temperature gradients made by thermal conduction, and then moving the preform to the forming zone in step 4). 분자 배향 용기를 성형하는 방법에 있어서, 1) 부분적으로 결정체인 분자 배향이 가능한 플라스틱 재료로부터 페쇄 단부와 개방 단부를 갖는 전체적으로 원통형의 중공 예비 성형품을 사출 성형하며, 상기 주형 공동은 그 결과 나온 예비 성형품이 상기 예비 성형품의 페쇄 단부와 개방 단부에서 두께가 감소하도록 형성하는 단계; 2) 상기 예비 성형품의 입간 물질이 용해하기 시작하는 온도 아래의 균일한 온도로 상기 예비 성형품을 냉각하는 단계; 3) 동시에, ⅰ)상기 예비 성형품을 방사열 공급원을 포함하는 가열 영역을 통과시키고; ⅱ)상기 예비 성형품이 상기 가열 영역 내에 있는 동안 상기 예비 성형품을 각 회전에 부과하고; ⅲ) 상기 예비 성형품의 외부 표면에 냉각가스를 향하게 하는 단계; 4) 상기 예비 성형품을 상기 방사열영역으로부터 제거하고 상기 예비 성형품의 외부 표면으로 냉각가스를 향하게 하는 단계; 5) 상기 예비 성형품을 성형 영역으로 급속히 이동시켜 상기 예비 성형품을 주형 내에 유지하는 단계를 구비하는 것을 특징으로 하는 방법.A method of forming a molecular orientation container, comprising: 1) injection molding an entirely cylindrical hollow preform having a closed end and an open end from a partially crystalline molecular material capable of molecular orientation, wherein the mold cavity is a resultant preform Forming a reduced thickness at the closed and open ends of the preform; 2) cooling the preform to a uniform temperature below the temperature at which the intergranular material of the preform begins to dissolve; 3) at the same time, i) passing the preform through a heating zone comprising a radiant heat source; Ii) imposing the preform on each revolution while the preform is in the heating zone; Iii) directing a cooling gas to the outer surface of the preform; 4) removing the preform from the radiant heat zone and directing cooling gas to the outer surface of the preform; 5) moving the preform rapidly into a forming area to maintain the preform in a mold. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960702182A 1993-10-27 1994-10-26 METHOD OF FORMING MOLECULARLY ORIENTED CONTAINERS KR960705669A (en)

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US14420493A 1993-10-27 1993-10-27
US08/144,204 1993-10-27
PCT/EP1994/003525 WO1995011791A2 (en) 1993-10-27 1994-10-26 Method of forming molecularly oriented containers

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DE19736462C2 (en) * 1997-08-21 2003-06-18 Advanced Photonics Tech Ag Method and device for thermoforming thermoplastics
WO2000061350A1 (en) * 1999-04-14 2000-10-19 Pressco Technology Inc. Method and apparatus for handling parts ejected from an injection molding machine
US20110206882A1 (en) * 2010-02-24 2011-08-25 Norman Scott Broyles Injection stretch blow molding process
WO2011148879A1 (en) 2010-05-28 2011-12-01 日精エー・エス・ビー機械株式会社 Preform opening crystallization method
CA2817555C (en) * 2010-11-12 2019-05-28 Niagara Bottling, Llc Preform extended finish for processing light weight bottles
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