WO1989012542A1 - Dispositif d'extrusion, tete d'extrusion pour un tel dispositif et produit en plastique fabrique au moyen dudit dispositif d'extrusion - Google Patents

Dispositif d'extrusion, tete d'extrusion pour un tel dispositif et produit en plastique fabrique au moyen dudit dispositif d'extrusion Download PDF

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Publication number
WO1989012542A1
WO1989012542A1 PCT/NL1989/000048 NL8900048W WO8912542A1 WO 1989012542 A1 WO1989012542 A1 WO 1989012542A1 NL 8900048 W NL8900048 W NL 8900048W WO 8912542 A1 WO8912542 A1 WO 8912542A1
Authority
WO
WIPO (PCT)
Prior art keywords
extrusion head
extruder
extrusion
frame
head
Prior art date
Application number
PCT/NL1989/000048
Other languages
English (en)
Inventor
Bernardus Everhardus Franciscus Timmerhuis
Original Assignee
Wavin B.V.
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 Wavin B.V. filed Critical Wavin B.V.
Publication of WO1989012542A1 publication Critical patent/WO1989012542A1/fr

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
    • 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
    • B29C48/266—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated
    • B29C48/2665—Means for allowing relative movements between the apparatus parts, e.g. for twisting the extruded article or for moving the die along a surface to be coated allowing small relative movement, e.g. adjustments for aligning the apparatus parts or for compensating for thermal expansion
    • 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
    • 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
    • B29C48/265—Support structures or bases for apparatus, e.g. frames
    • 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

Definitions

  • Extrusion device Extrusion device, extrusion head for such a device and plastics product manufactured with use of said extrusion device.
  • the invention relates in the first place to a device for moulding a plastic object, at least comprising an extruder and an independently supported extrusion head which interact with each other and can be connected to means of sizing, cooling and transporting.
  • Such devices for moulding plastic objects are generally known and are frequently used to manufacture, for example, tubes, profiled sections, etc., from plastics such as polyvinyl chloride, polethylene and the like.
  • the extrusion of such plastics is carried out at fairly high temperature with fairly high force being exerted, with the result that allowance has to be made in the device for appreciable thermal expansion of the various components and it being necessary to absorb the process forces under varying conditions.
  • the extruder and the extrusion head in such known devices have a fixed position - with respect to the fixed ground on which they are installed, which has the result that while the apparatus is being started up for the purpose of moulding plastic objects, an adjustment change which is noticeable on the product takes place, with the result that an optimum alignment of the entire apparatus is achieved at the high temperature concerned only by adjustment corrections.
  • Such a start-up process obviously gives rise to appreciable problems and to a large quantity of reject material, while an optimally adjusted apparatus nevertheless becomes misaligned again during operation, with the result that a readjustment is regularly necessary, with the rejection of products associated therewith.
  • the object of the present invention is to provide a solution to the problems outlined above which shortens the start-up of the device and promotes the provision of a satisfactory product by the apparatus.
  • the apparatus of the type mentioned earlier is characterized for this purpose in that the extruder is installed in a fixed manner in an extruder frame and the extrusion head, which adjoins the debouchment of the extruder, Is installed in a movable manner.
  • the extrusion head is installed in a fixed frame, height and transverse adjustment means being present for adjusting the extrusion head beforehand with respect to the extruder and which make possible a movement of the extrusion head in a direction which is parallel to the axis of the extruder.
  • the presence of the said adjustment means makes a transverse and height adjustment of the head possible before the device is put into operation.
  • the transverse adjustment means act in a horizontal plane on the extrusion head, while an axial movement of the extrusion head is nevertheless possible.
  • the frame which supports the head is advantageously connected to the frame which incorporates the sizing, cooling and transporting means (in general, follow-on equipment).
  • the procedure for operating the device outlined above is that, before the apparatus is started up, an optimum adjustment of the extrusion head with respect to the extruder axis and follow-on equipment is achieved, after which the installation is allowed to start up.
  • Expansion of the various components of the device will then be capable of being absorbed because the extrusion head is able to move in a direction parallel to the extruder axis, while thermal expansion of the head itself has no effect on the alignment of the device because the head is supported on the centre line thereof.
  • the extrusion head is incorporated in a frame which is provided with adjustment means for adjusting the extrusion head with respect to an extruder installed in a fixed manner, while means are furthermore present which make possible a movement of the extrusion head in a direction which is parallel to the axis of the extruder.
  • the movement in a direction parallel to the axis of the extruder can be carried out by the presence of rolling means and guiding means which interact with each other.
  • Said rolling means are advantageously connected to the extrusion head, while the guiding means are connected to the frame.
  • the invention also relates to an extrusion head for use in a device for moulding plastic objects, which is characterized in that the extrusion head is provided with means which make possible a movement thereof with respect to a frame in which the head is incorporated, while means are furthermore present for adjusting the extrusion head with respect to an extruder installed in a fixed manner.
  • the means which make possible a movement of the extrusion head are means which make possible a movement in a direction which is parallel to the axis of an extruder to be connected to the extrusion head.
  • the invention also relates to an extrusion line, at least comprising an extruder and an extrusion head interacting therewith in a frame for moulding a plastic product, sizing means and means for regulating the speed of movement of the moulded product, which is characterized in that the extrusion head is installed in a manner such that it can be aligned with the axis of the extruder and in that the extrusion head can carry out a movement which is parallel to the direction of the axis of the extruder.
  • the invention also relates to a frame for an extrusion head which is characterized in that said frame comprises adjustment means for adjusting an extrusion head to be accommodated and also means which make possible a movement of the extrusion head with respect to the frame and In a direction which is parallel to the axis of an extruder to be connected to the extrusion head.
  • the invention relates to a plastic product manufactured using extrusion in a device at least comprising an extruder and an extrusion head which is characterized in that the plastic product is moulded using a device according to the Invention as decribed above and/or an extrusion line according to the invention as described above.
  • Figure 1 shows a diagrammatic view of an extrusion head, according to the invention, accommodated in a frame
  • Figure 2 shows a side elevation of the extrusion head according to Figure 1
  • Figure 3 shows diagrammatically the installation of an extrusion line according to the invention.
  • an extrusion head which is accommodated in a frame is indicated by 1.
  • the frame is indicated by the reference numerals 2 and 7.
  • the frame accommodates a baseplate 3 which can be given the correct height adjustment with the aid of adjustment screws 4.
  • the correct transverse adjustment of the extrusion head with respect to an extruder adjoining the extrusion head can be achieved with the aid of adjustment screws 6 (the adjustment screw on the left-hand side of the figure is not indicated), it being pointed out that the adjustment screws 4 project through slotted holes which are present in the receiving plates 5, with the result that a free adjustment of the plate 3, and consequently of the extrusion head 13, is possible.
  • a transverse centreing device 8 is present in order to maintain the transverse centreing of the head with respect to the frame for a chosen adjustment.
  • rollers 11 connected to the extrusion head and guiding strips 10 connected to the frame.
  • the rollers are attached to the frame while the guiding strips are connected to the extrusion head; in that case, however, the guiding strip will engage at the top of the rollers.
  • the rollers are fitted at the same height as the axis of the extrusion head; a number of such rollers are accommodated in general in the axial direction of the extrusion head.
  • Figure 2 shows the extrusion head in its frame from Figure 1 in side elevation. It can be clearly seen that in this case three rollers 11 are present which rest on a guiding strip 10 which is connected to the frame part 7.
  • Figure 3 shows diagrammatically an extrusion line in plan view, it being indicated that the extruder 21 is connected in a fixed manner to the fixed world, while the extrusion head 20 connecting thereto is installed in a movable manner.
  • 23 Indicates sizing means, while 25 represents a cooling apparatus.
  • a pulling apparatus is indicated by 24, while a cutting apparatus i ' s indicated ' diagram atically by 29.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

Le dispositif d'extrusion décrit comprend au moins une extrudeuse et une tête d'extrusion. Pour compenser les forces de dilatation thermique qui pourraient se produire dans une chaîne d'extrusion dans laquelle est incorporé un dispositif d'extrusion et pour obtenir ainsi un produit uniforme et notamment une réduction de la quantité des rejets pendant le démarrage de la chaîne, l'extrudeuse est installée fixe dans un bâti d'extrudeuse alors que la tête d'extrusion est installée mobile. Plus particulièrement, la tête d'extrusion est capable de se déplacer dans une direction parallèle à l'axe de l'extrudeuse. La demande se rapporte également à une tête d'extrusion, à un bâti pour une tête d'extrusion et à un produit en plastique fabriqué au moyen du dispositif d'extrusion de la présente invention.
PCT/NL1989/000048 1988-06-13 1989-06-12 Dispositif d'extrusion, tete d'extrusion pour un tel dispositif et produit en plastique fabrique au moyen dudit dispositif d'extrusion WO1989012542A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8801505A NL8801505A (nl) 1988-06-13 1988-06-13 Extrusie-inrichting, extrusiekop voor een dergelijke inrichting, extrusiekopgestel alsmede kunststofvoortbrengsel dat is vervaardigd met behulp van de extrusie-inrichting.
NL8801505 1988-06-13

Publications (1)

Publication Number Publication Date
WO1989012542A1 true WO1989012542A1 (fr) 1989-12-28

Family

ID=19852450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1989/000048 WO1989012542A1 (fr) 1988-06-13 1989-06-12 Dispositif d'extrusion, tete d'extrusion pour un tel dispositif et produit en plastique fabrique au moyen dudit dispositif d'extrusion

Country Status (3)

Country Link
AU (1) AU3774789A (fr)
NL (1) NL8801505A (fr)
WO (1) WO1989012542A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103568247A (zh) * 2013-11-08 2014-02-12 四川中装科技有限公司 塑料挤出机机筒支撑架
CN107877813A (zh) * 2016-09-29 2018-04-06 天津金恩斯科技有限公司 一种tpu挤出机机筒支撑架

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1027018B (de) * 1956-11-14 1958-03-27 Willi Keil Axial bewegliche Lagerung fuer Rohrleitungen
US3619859A (en) * 1969-12-01 1971-11-16 Crompton & Knowles Corp Extrusion apparatus
DE2260545A1 (de) * 1972-12-11 1974-06-27 Hans Zimmermann Abstuetzeinrichtung fuer rohre
US3826602A (en) * 1972-09-29 1974-07-30 Beloit Corp Flexible adapter for conveying material from extruder to die
JPS50101452A (fr) * 1974-01-10 1975-08-12
US4004766A (en) * 1975-10-28 1977-01-25 Long William W Isolation clamp for transmission tube
FR2369923A1 (fr) * 1976-11-08 1978-06-02 Kobe Steel Ltd Procede et appareil de revetement de tuyaux d'acier
FR2390272A1 (fr) * 1977-05-11 1978-12-08 Reifenhaeuser Kg Installation pour l'extrusion d'objets en matiere plastique
DE3616761C1 (en) * 1986-05-17 1987-07-16 Barmag Barmer Maschf Large extruder for the processing of plastics
JPS62182136A (ja) * 1986-02-07 1987-08-10 Nippon Telegr & Teleph Corp <Ntt> 軸ずれ防止機能付きガラスフアイバ被覆用押出機
WO1988006515A1 (fr) * 1987-03-06 1988-09-07 Wavin B.V. Construction d'un corps d'extrudeuse adsorbant la dilatation thermique

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1027018B (de) * 1956-11-14 1958-03-27 Willi Keil Axial bewegliche Lagerung fuer Rohrleitungen
US3619859A (en) * 1969-12-01 1971-11-16 Crompton & Knowles Corp Extrusion apparatus
US3826602A (en) * 1972-09-29 1974-07-30 Beloit Corp Flexible adapter for conveying material from extruder to die
DE2260545A1 (de) * 1972-12-11 1974-06-27 Hans Zimmermann Abstuetzeinrichtung fuer rohre
JPS50101452A (fr) * 1974-01-10 1975-08-12
US4004766A (en) * 1975-10-28 1977-01-25 Long William W Isolation clamp for transmission tube
FR2369923A1 (fr) * 1976-11-08 1978-06-02 Kobe Steel Ltd Procede et appareil de revetement de tuyaux d'acier
FR2390272A1 (fr) * 1977-05-11 1978-12-08 Reifenhaeuser Kg Installation pour l'extrusion d'objets en matiere plastique
JPS62182136A (ja) * 1986-02-07 1987-08-10 Nippon Telegr & Teleph Corp <Ntt> 軸ずれ防止機能付きガラスフアイバ被覆用押出機
DE3616761C1 (en) * 1986-05-17 1987-07-16 Barmag Barmer Maschf Large extruder for the processing of plastics
WO1988006515A1 (fr) * 1987-03-06 1988-09-07 Wavin B.V. Construction d'un corps d'extrudeuse adsorbant la dilatation thermique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103568247A (zh) * 2013-11-08 2014-02-12 四川中装科技有限公司 塑料挤出机机筒支撑架
CN103568247B (zh) * 2013-11-08 2015-12-02 四川中装科技有限公司 塑料挤出机机筒支撑架
CN107877813A (zh) * 2016-09-29 2018-04-06 天津金恩斯科技有限公司 一种tpu挤出机机筒支撑架
CN107877813B (zh) * 2016-09-29 2020-06-09 天津金恩斯科技有限公司 一种tpu挤出机机筒支撑架

Also Published As

Publication number Publication date
NL8801505A (nl) 1990-01-02
AU3774789A (en) 1990-01-12

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