KR910000498B1 - Thickness controlling method for parison in plastic blow molding process - Google Patents

Thickness controlling method for parison in plastic blow molding process Download PDF

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Publication number
KR910000498B1
KR910000498B1 KR1019860004335A KR860004335A KR910000498B1 KR 910000498 B1 KR910000498 B1 KR 910000498B1 KR 1019860004335 A KR1019860004335 A KR 1019860004335A KR 860004335 A KR860004335 A KR 860004335A KR 910000498 B1 KR910000498 B1 KR 910000498B1
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parison
thickness
length
wall thickness
blow molding
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KR1019860004335A
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Korean (ko)
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KR870001920A (en
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아끼히로 노무라
히사히꼬 후까세
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이시가와지마 하리마 쥬고교 가부시끼가이샤
이나바 고오사꾸
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    • 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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/7686—Measuring, controlling or regulating the ejected articles, e.g. weight control
    • 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
    • B29C49/78—Measuring, controlling or regulating
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B29C48/2528—Drive or actuation means for non-plasticising purposes, e.g. dosing unit
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
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    • 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
    • B29C49/04—Extrusion blow-moulding
    • B29C49/0411—Means for defining the wall or layer thickness
    • B29C49/04114—Means for defining the wall or layer thickness for keeping constant 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
    • 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
    • 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
    • B29C49/78—Measuring, controlling or regulating
    • B29C2049/787—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
    • 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
    • B29C49/78—Measuring, controlling or regulating
    • B29C2049/788—Controller type or interface
    • B29C2049/78805—Computer or PLC control
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92076—Position, e.g. linear or angular
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92142—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92152—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92438—Conveying, transporting or storage of 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92466—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
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    • B29C2948/92571—Position, e.g. linear or angular
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
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    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
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    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
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    • B29C2948/92904—Die; Nozzle zone
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92961—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
    • 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
    • B29C49/04—Extrusion 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
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    • B29C49/42413—Marking or printing with a pattern for analysing deformation
    • 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
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0022—Bright, glossy or shiny surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

내용 없음.No content.

Description

플라스틱 블로우 성형에 있어서의 파리손의 두께 제어방법Method of controlling thickness of flyson in plastic blow molding

제1도는 종래 블로우 성형기계를 설명하기 위해 사용하는 도면.1 is a view used to explain a conventional blow molding machine.

제2도는 본 발명에 의한 플라스틱 블로우 성형방법을 실시하기에 적합한 기계를 설명하기 위해 사용하는 도면.2 is a view used to describe a machine suitable for carrying out the plastic blow molding method according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 파리손 4 : 맨드릴1: Parison 4: Mandrel

10 : 설정장치 13 : 마커(marker)10: setting device 13: marker

14 : 두께 측정기 17 : 이동블록14 thickness gauge 17 moving block

18 : 길이 검출기 20 : 플런저 위치신호18: length detector 20: plunger position signal

21 : 실제 벽두께신호 22 : 설정 벽두께신호21: Actual wall thickness signal 22: Set wall thickness signal

24 : 제어장치24: controller

본 발명은 플라스틱 성형방법에 관한 것으로서, 특히 파리손의 단면두께의 제어방법에 관한 것이다.TECHNICAL FIELD The present invention relates to a plastic molding method, and more particularly, to a method for controlling the cross-sectional thickness of a parison.

제1도는 종래 플라스틱 블로우 성형기계를 도시한다. 파리손(1)(노즐에서 압출된 원통형 플라스틱 몸체)을 성형하는 이중 원추형 헤드(2)는 다이(도시되지 않음)에 부착된다. 헤드(2)에는 보조실린더(3)로써 수직이동할 수 있게 맨드릴(4)이 삽입되어서 맨드릴(4)의 하단부와 헤드(2)의 내면 하단부 사이의 간극을 맨드릴(4)의 수직운동으로 조정할 수 있도록 노즐 슬릿(5)을 형성한다. 헤드(2)와 맨드릴(4) 사이에 만들어진 공간내에 원료(6)를 삽입하기 위해 사출실린더(8)로 중공의 사출플런저(7)를 수직이동시킨다. 노즐 슬릿(5)의 두께 모양을 설정하기 위하여 종래 핀꽃이 또는 활주 스위치와 같이 설정수단을 포함하는 설정장치(10)에 센서(9)를 연결하여 사출플런저(7)의 사출행정을 검출한다. 또한, 설정장치(10)에는 보조 실린더(3)에 연결된 보조밸브(11)와, 파리손(1)의 종방향(즉, 파리손(1)이 압출되는 방향)에서 소정거리로 서로 간격을 유지한 마크(12)를 만드는 마커(13)가 연결된다. 초음파 두께 측정기와 같은 두께 측정기(14)가 또한 설정장치(10)에 연결되어 각각의 마크(12)에서 성형품(15)의 단면 또는 벽두께를 측정한다.1 shows a conventional plastic blow molding machine. The double conical head 2 forming the parison 1 (cylindrical plastic body extruded from the nozzle) is attached to a die (not shown). The mandrel 4 is inserted into the head 2 to move vertically as the auxiliary cylinder 3 so that the gap between the lower end of the mandrel 4 and the lower end of the inner surface of the head 2 can be adjusted by the vertical movement of the mandrel 4. To form the nozzle slit (5). The hollow injection plunger 7 is vertically moved by the injection cylinder 8 to insert the raw material 6 into the space made between the head 2 and the mandrel 4. In order to set the thickness shape of the nozzle slit 5, a sensor 9 is connected to a setting device 10 including setting means such as a conventional pin flower or a slide switch to detect the injection stroke of the injection plunger 7. In addition, the setting device 10 is spaced apart from each other by a predetermined distance in the auxiliary valve 11 connected to the auxiliary cylinder 3 and in the longitudinal direction of the flyson 1 (that is, the direction in which the flyson 1 is extruded). The marker 13 which makes the mark 12 hold | maintained is connected. A thickness gauge 14, such as an ultrasonic thickness gauge, is also connected to the setting device 10 to measure the cross section or wall thickness of the molded product 15 at each mark 12.

상술한 형식의 플라스틱 블로우 성형기계로 파리손의 단면 또는 벽두께를 설정하려면, 먼저 사출플런저(7)의 사출행정과 같이 파리손의 압출에 반응하여 변하는 양을 독립 변수로써 취급하고, 사출플런저(7)를 진행시키기 위해 파리손(1)의 단면 또는 벽두께의 팽창이나 변화에 따르 소정거리로써 노즐 슬릿폭(Si)을 설정장치(10)로 공급하여 노즐 슬릿폭의 형태를 정한 다음에, 사출실린더(8)로 압출 성형을 시작한다. 사출플린저(7)의 위치를 나타내는 신호는 센서(9)에 의해 연속적으로 설정장치(10)로 송신되는데, 사출실린더(7)의 각각의 소정 위치에서 보조 실린더(3)가 맨드릴(4)을 수직이동시키므로 노즐 슬릿폭(Si)은 설정치를 가진다. 동시에, 설정장치(10)에서 마커(13)로 신호를 전달하여 사출플런저(7)의 각각의 소정 위치에서 파리손에 마크(12)를 만든다. 마크(12)는 사출플런저(7)의 사출행정에 반응하여 만들어지기 때문에 파리손(1)의 종방향에서 서로 간격을 유지하게 된다.In order to set the cross-section or wall thickness of the parison with the plastic blow molding machine of the above-described type, first, the amount that changes in response to the extrusion of the parison, such as the injection stroke of the injection plunger 7, is treated as an independent variable, and the injection plunger 7 In order to advance), the nozzle slit width Si is supplied to the setting device 10 at a predetermined distance in accordance with the expansion or change of the cross-section or wall thickness of the parison 1, and then the shape of the nozzle slit width is determined. Extrusion is started into the cylinder (8). A signal indicative of the position of the injection plunger 7 is continuously transmitted by the sensor 9 to the setting device 10, in which the auxiliary cylinder 3 is provided with a mandrel 4 at each predetermined position of the injection cylinder 7. Since the vertical movement of the nozzle slit width (Si) has a set value. At the same time, a signal is transmitted from the setting device 10 to the marker 13 to make a mark 12 in the flyson at each predetermined position of the injection plunger 7. Since the marks 12 are made in response to the injection stroke of the injection plunger 7, the marks 12 are spaced from each other in the longitudinal direction of the flyson 1.

파리손(1)의 압출 성형을 완료한 후에, 다이에서 파리손을 제거하고, 각각의 마크(12)에서 두께 측정기(14)로 파리손의 단면 또는 벽두께를 측정한다. 조작자는 실제 또는 측정 두께와 설정 두께를 비교하고, 설정장치(10)를 조정하여 설정 두께가 실제 또는 측정 두께 보다 얇을 때 노즐 슬릿폭(Si)을 증가시키고, 설정두께가 실제 또는 측정두께 보다 두꺼울 때 노즐 슬릿폭(Si)을 감소시킨다. 구후에 상술한 방법에 따라 재차 성형작업을 수행하고, 각 마크(12)에서 파리손(1)의 단면 또는 벽두께를 측정하여 설정 두께와 비교한다. 실제 벽 도느 단면 두께와 설정 두께가 실질적으로 일치하면 노즐 슬릿폭(Si)의 조정을 완료하게 되고, 다음에 연속생산을 시작한다.After the extrusion of the parison 1 is completed, the parison is removed from the die and the cross section or wall thickness of the parison is measured with a thickness gauge 14 at each mark 12. The operator compares the actual or measured thickness with the set thickness, adjusts the setting device 10 to increase the nozzle slit width Si when the set thickness is thinner than the actual or measured thickness, and the set thickness is thicker than the actual or measured thickness. When the nozzle slit width (Si) is reduced. Afterwards, molding is performed again according to the above-described method, and the cross section or wall thickness of the parison 1 is measured at each mark 12 and compared with the set thickness. If the actual wall cross-sectional thickness and the set thickness substantially coincide, the adjustment of the nozzle slit width Si is completed, and then continuous production starts.

그러나, 상술한 형식의 플라스틱 블로우 성형방법은 다음과 같은 문제점이 있다.However, the plastic blow molding method of the above-described type has the following problems.

(1) 노즐 슬릿폭(Si)이 원주방향으로 균일해야 할 것을 조건으로 한다. 파리손(1)의 단면 또는 벽두께가 이의 원주방향으로 부분적으로 증가하여 예를들어 구멍이나 보강부분을 제공하게 되면, 원주방향에서 간극측면을 측정할 수가 없다.(1) The nozzle slit width Si is conditioned to be uniform in the circumferential direction. If the cross section or wall thickness of the parison 1 partially increases in its circumferential direction, for example to provide a hole or a reinforcing part, the gap side cannot be measured in the circumferential direction.

(2) 다만 성형품의 측정된 단면 또는 벽두께만이 귀환하므로 파리손의 길이를 보장할 수 없고 변경시킨 부분이 다이의 동일한 장소에 위치한다는 것을 보장할 수 없어서 비실용적이다.(2) However, only the measured cross-section or wall thickness of the molded part is returned, so that the length of the fly hand cannot be guaranteed and that the changed part cannot be guaranteed to be located at the same place on the die, which is impractical.

(3) 조작자에 의해 노즐 슬릿폭이 설정되므로, 조작이 복잡하고 비효율적이다.(3) Since the nozzle slit width is set by the operator, the operation is complicated and inefficient.

본 발명은 종래 플라스틱 블로우 성형방법에서 마주치게된 상기 문제점 및 다른 문제점을 해결하기 위한 것이며, 본 발명의 목적은 이동블록으로 두꺼운 단면 또는 벽을 제어하면서 맨드릴의 수직이동으로써 단면 또는 벽두께를 일정하게 제어하는 방식의 플라스틱 블로우 성형방법으로서 원주상 간격 측면과 파리손의 길이를 동시에 작동으로 제어하는데 있다.The present invention is to solve the above and other problems encountered in the conventional plastic blow molding method, the object of the present invention is to control the thick section or wall with a moving block while maintaining a constant cross section or wall thickness by vertical movement of the mandrel The plastic blow molding method of the control method is to control the circumferential interval side and the length of the parison by operation at the same time.

본 발명의 상기 목적 및 다른 목적과, 효과, 특징 및 장점은 첨부된 도면과 관련된 양호한 실시예를 설명함으로써 더욱 명확하게 나타날 것이다.The above and other objects, effects, features and advantages of the present invention will become more apparent from the following description of the preferred embodiments associated with the accompanying drawings.

도면 전체를 통해 유사한 부품은 동일한 참고부호를 사용하였다.Like parts are designated by like reference numerals throughout the drawings.

제2도는 본 발명에 의하여 플라스틱 블로우 성형방법을 수행하도록 응용된 기계를 도시한다. 헤드(2)의 하단부에서 헤드(2)의 원주방향으로 간격을 유지하며 배치된 이동블록(17)은 각각의 작용기(16)에 의해 방사방향으로 이동하며 파리손(1)의 두꺼운 단면 또는 벽(g1, g2)을 만든다. 각각의 이동블록 아래에는 마커(13)을 배치시켜 파리손(1)의 종방향으로 파리손에 소정 간격으로 마크(12)를 만든다. 파리손(1)의 일정한 단면 또는 벽 두께부분(G)에 마크를 만들기 위해 다른 마커(도시되지 않음)를 제공한다. 제어장치(24)에서 나오는 제어신호에 따라서 작용기(16), 마커(13) 및 맨드릴(4)을 수직이동시키는 보조실린더(3)가 작동된다.2 shows a machine adapted to perform a plastic blow molding method according to the present invention. At the lower end of the head 2, the moving blocks 17 arranged at intervals in the circumferential direction of the head 2 are moved radially by the respective functional groups 16 and the thick sections or walls of the flyson 1 are arranged. Create (g 1 , g 2 ). A marker 13 is disposed below each moving block to make a mark 12 at predetermined intervals in the flyson in the longitudinal direction of the flyson 1. Another marker (not shown) is provided to mark a certain section or wall thickness G of the parison 1. In accordance with the control signal from the control device 24, the auxiliary cylinder 3 for vertically moving the actuator 16, the marker 13 and the mandrel 4 is operated.

파리손(1)의 길이를 검출하기 위해 광전관과 같은 길이 검출기(18)를 설치한다.In order to detect the length of the parison 1, a length detector 18 such as a phototube is provided.

길이 검출기(18)로부터의 길이신호(19)와, 센서(9)로부터의 플런저 위치신호(20)와, 두께측정기(14)로부터의 단면 또는 벽두께신호(21)가 제어장치(24)에 인가되어서 파리손(1)의 길이 함수로써 두꺼운 단면 또는 벽부분의 일정한 두께(G) 및 두께(g2, g2)를 표시한다.The length signal 19 from the length detector 18, the plunger position signal 20 from the sensor 9, and the cross section or wall thickness signal 21 from the thickness gauge 14 are transmitted to the control device 24. It is applied to indicate the constant thickness (G) and thickness (g 2 , g 2 ) of the thick section or wall portion as a function of the length of the parison (1).

일정한 단면 또는 벽두께 부분의 설정 두께와 두꺼운 단면 또는 벽부분의 현재 두께를 나타내는 설정 벽두께신호(22)와, 파리손의 설정 길이를 나타내는 신호(23)가 제어장치(24)에 인가된다.The set wall thickness signal 22 indicating the set thickness of the constant cross section or the wall thickness portion and the present thickness of the thick cross section or the wall portion, and the signal 23 indicating the set length of the flyson are applied to the control device 24.

그러므로, 설정 벽두께신호(22)와 각각의 마크 부분에서 시험 성형품(15)의 실제 벽두께신호(21)간의 비율에 반응하여, 제어장치(24)는 원주방향에서 각각의 마크부분의 새로운 슬릿폭을 얻고, 이로써 파리손의 종방향에서 소정 간격으로 원주상 간극 측면을 얻는다. 이렇게 얻어진 간극 측면에 따라 보조실린더(3)의 보조밸브(11)와 작용기(16)를 작동시키면 일정한 단면 또는 벽두께 부분(G)과 두꺼운 단면 또는 벽부분(g1, g2)은 제각기 자동으로 소정의 단면 또는 벽두께를 가질 것이다.Therefore, in response to the ratio between the set wall thickness signal 22 and the actual wall thickness signal 21 of the test molded part 15 in each mark portion, the controller 24 causes a new slit of each mark portion in the circumferential direction. The width is obtained, thereby obtaining the circumferential gap side surfaces at predetermined intervals in the longitudinal direction of the parison. By operating the auxiliary valve 11 and the functional group 16 of the auxiliary cylinder 3 according to the gap side thus obtained, the constant section or wall thickness part G and the thick section or wall part g 1 , g 2 are respectively automatically It will have a predetermined cross section or wall thickness.

추가로, 길이 검출기(18)로 파리손(1)의 길이를 검출하고, 검출한 길이신호(19)는 제어장치(24)로 인가되어 보조실린더(3)와 작용기(16)를 제어하여 파리손(1)의 설정 길이신호(23)를 가지도록 하기 위하여 파리손(1)의 원주방향에서 전체 두께를 조정한다.In addition, the length detector 18 detects the length of the parison 1, and the detected length signal 19 is applied to the controller 24 to control the auxiliary cylinder 3 and the functional group 16 to fly. The overall thickness is adjusted in the circumferential direction of the fly hand 1 in order to have the set length signal 23 of the hand 1.

본 발명은 상기 실시예에 제한받지 않으며 본 발명의 정신을 벗어나지 않고 여러 가지로 변경이 가능하다. 예를들면, 구성부품 자체가 노즐 슬릿을 형성하고 탄성력을 가지도록 이동블록(17)을 제공하게 함으로써 이동블록(17)이 구성부품의 탄성 변형의 형태로 이동되게 한다. 게다가, 두꺼운 벽 또는 단면을 형성하고, 마크를 만들고, 파리손의 길이를 검출하는 방법을 다양하게 이용할 수 있다.The present invention is not limited to the above embodiments and various modifications can be made without departing from the spirit of the present invention. For example, by allowing the component itself to form the nozzle slit and providing the moving block 17 to have elastic force, the moving block 17 is moved in the form of elastic deformation of the component. In addition, various methods of forming a thick wall or cross section, making a mark, and detecting the length of the parison can be used.

본 발명의 효과, 특정 및 장점은 다음과 같이 약술할 수 있다.The effects, features and advantages of the present invention may be outlined as follows.

(1) 일정한 벽 또는 단면두께와 확대된 두께를 가지는 파리손의 성형으로서, 파리손의 원주방향으로 간극측면을 검출하고, 이에따라 파리손의 원주방향으로 단면 또는 벽두께를 자동으로 제어할 수 있다. 그 결과, 복잡한 설정작업을 제거할 수 있고, 제어능력을 증강시킬 수 있다.(1) As a molding of a fly hand having a constant wall or section thickness and an enlarged thickness, the gap side surface can be detected in the circumferential direction of the fly hand, and accordingly, the cross section or wall thickness can be automatically controlled in the circumferential direction of the fly hand. . As a result, complicated setting work can be eliminated and controllability can be enhanced.

(2) 파리손의 길이를 검출한 것에 따라 맨드릴 및 이동블록의 위치를 조정한다. 따라서, 원주방향으로 전체 두께를 조정함으로써 파리손의 길이를 자동으로 제어할 수 있다.(2) Adjust the position of the mandrel and the moving block as the length of the parison is detected. Therefore, the length of the parison can be automatically controlled by adjusting the overall thickness in the circumferential direction.

(3) 성형품의 단면 또는 벽두께의 제어에 관한 정확성이 개량되고, 또는 성형품의 단면 또는 벽두께의 분포와 노즐 슬릿폭의 설정형태를 용이하게 비교할 수 있고, 따라서 노즐 슬릿폭의 설정형태를 간단하게 바꿀 수 있다. 그 결과 품질 관리성을 향상시킬 수 있다.(3) The accuracy regarding the control of the cross section or the wall thickness of the molded article is improved, or the distribution of the cross section or the wall thickness of the molded article and the setting form of the nozzle slit width can be easily compared, thus simplifying the setting form of the nozzle slit width. Can be changed. As a result, quality controllability can be improved.

(4) 성형품을 설치하는 지그의 적절한 설계와 구조에 의해 성형품의 개별적인 부부의 단면 또는 벽두께를 자동으로 측정할 수 있으므로 컴퓨터를 이용하여 연속생산을 실현시킬 수 있다.(4) The cross section or wall thickness of individual couples of molded parts can be automatically measured by the proper design and structure of the jig for installing the molded product, so that continuous production can be realized by computer.

Claims (1)

플라스틱 원료(6)가 맨드릴(4)에 의해 부분적으로 한정된 환형의 간극을 통해 압출되며, 맨드릴(4)의 종방향의 이동에 의해 제어된 하나 또는 그 이상의 일정 벽두께부(G)와 부분적으로 환형 간극을 한정하는 이동블록(17)의 횡방향의 이동에 의해 제어된 하나 또는 그 이상의 다른 벽두께부(g1, g2)를 가지는 플라스틱의 블로우 성형에 있어서의 파리손(1)의 두께 제어방법에 있어서, 맨드릴(4)과 이동블록(17)의 위치를 제어하도록 배치된 제어장치(24)에서의 소정 두께에 따른 간극의 설정값을 지시하는 설정 벽두께신호(22)를 기억하는 단계와, 파리손을 압출하고, 그 파리손의 압출동안에 상기 파리손의 일정 벽두께부(G)의 적어도 일부분과 그로부터 원주방향으로 떨어진 다른 벽두께부(g1, g2)의 적어도 일부분에 종방향의 소요 위치에 마크(12)를 부착하는 단계와, 성형품(15)을 성형한 후 마크(12)에서 벽두께를 측정하여 그 소정두께와 비교하고 측정 두께값과 소정 두께값과의 차이를 제거 혹은 감축하도록 제어장치(24)에 기억된 값을 조정하는 단계와, 파리손의 길이를 측정하여 소정길이 즉, 두께분포가 결정된때의 파리손 길이와 비교하여, 다음 파리손 길이가 거의 동등하도록 제어장치(24)에 기억된 전체값을 조정하는 조작을 하여 파리손을 성형하는 단계를 구비하는 것을 특징으로 하는 플라스틱 블로우 성형에 있어서의 파리손의 두께 제어방법.The plastic raw material 6 is extruded through an annular gap defined in part by the mandrel 4 and partially with one or more constant wall thicknesses G controlled by the longitudinal movement of the mandrel 4. Thickness of the flyson 1 in blow molding of plastic having one or more other wall thicknesses g 1 , g 2 controlled by the transverse movement of the moving block 17 defining the annular gap In the control method, a set wall thickness signal 22 for indicating a set value of a gap according to a predetermined thickness in a control device 24 arranged to control the positions of the mandrel 4 and the moving block 17 is stored. And extruding the parison, and at least a portion of the wall thickness portion G of the parison during the extrusion of the parison and at least a portion of the other wall thickness portions g 1 , g 2 circumferentially away therefrom. Attach the mark 12 to the required position in the longitudinal direction. And after molding the molded product 15, the wall thickness is measured at the mark 12, compared with the predetermined thickness, and stored in the controller 24 to remove or reduce the difference between the measured thickness value and the predetermined thickness value. Adjusting the value, measuring the length of the parison and comparing the predetermined length, i.e., with the parison length when the thickness distribution is determined, the total value stored in the controller 24 so that the next parison length is approximately equal. And a step of forming the parison by performing an operation of adjusting the thickness of the parison in the plastic blow molding.
KR1019860004335A 1985-08-01 1986-06-02 Thickness controlling method for parison in plastic blow molding process KR910000498B1 (en)

Applications Claiming Priority (3)

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JP60170165A JPS6230020A (en) 1985-08-01 1985-08-01 Plastic blow molding process
JP170.165 1985-08-01
JP170165 1985-08-01

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KR870001920A KR870001920A (en) 1987-03-28
KR910000498B1 true KR910000498B1 (en) 1991-01-26

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DE3619113C2 (en) 1990-10-25
DE3619113A1 (en) 1987-02-12
GB2178361A (en) 1987-02-11
CN86104270A (en) 1987-01-28
KR870001920A (en) 1987-03-28
SE8602466D0 (en) 1986-05-30
JPH035294B2 (en) 1991-01-25
IT8620626A0 (en) 1986-05-30
SE8602466L (en) 1987-02-02
GB8618580D0 (en) 1986-09-10
GB2178361B (en) 1989-07-26
JPS6230020A (en) 1987-02-09
IT1204887B (en) 1989-03-10

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