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WO2004083054A1 - Produit semi-fini en matiere plastique - Google Patents

Produit semi-fini en matiere plastique Download PDF

Info

Publication number
WO2004083054A1
WO2004083054A1 PCT/CH2004/000143 CH2004000143W WO2004083054A1 WO 2004083054 A1 WO2004083054 A1 WO 2004083054A1 CH 2004000143 W CH2004000143 W CH 2004000143W WO 2004083054 A1 WO2004083054 A1 WO 2004083054A1
Authority
WO
WIPO (PCT)
Prior art keywords
semi
finished product
product according
thread
predetermined breaking
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.)
Ceased
Application number
PCT/CH2004/000143
Other languages
German (de)
English (en)
Inventor
Werner Fritz Dubach
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.)
Terxo AG
Original Assignee
Terxo 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 Terxo AG filed Critical Terxo AG
Publication of WO2004083054A1 publication Critical patent/WO2004083054A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B65D5/746—Spouts formed separately from the container
    • B65D5/747—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall
    • B65D5/748—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall a major part of the container wall or membrane being left inside the container after the opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/08—Threaded or like closure members secured by rotation; Bushes therefor
    • B65D39/082—Bung-rings and bungs for bung-holes
    • B65D39/084—Separated bung-rings made by one element
    • 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
    • B29C45/0081—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of objects with parts connected by a thin section, e.g. hinge, tear line
    • 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
    • B29C45/26—Moulds
    • B29C45/2618—Moulds having screw-threaded mould walls

Definitions

  • the present invention relates to a semi-finished product consisting of two one-piece plastic parts, each with a cylindrical section, of which one cylindrical section has an external thread and the other section has an internal thread, and that both plastic parts are connected with their cylindrical sections so that they are axially aligned one above the other by means of predetermined breaking points are that they are held in a correct pre-assembly position with respect to one another and can be joined together while destroying the predetermined breaking points.
  • the two plastic parts can be any parts that are screwed together with their two cylindrical sections in the assembled state.
  • Typical examples of such applications are plastic parts of a closure in which one part forms the lower part and the other part forms the screw cap.
  • line couplings that consist of several parts, or in the case of metering devices in which one plastic part is a cylinder and the other plastic part is a piston, and in closure systems in which a cylindrical cutting element is held in a pouring spout, are suitable here.
  • Figure 2 shows a simplified basic perspective view of a semi-finished product according to the invention
  • Figure 3 is a side view of such
  • FIG. 4 shows in perspective a development of a partial section through two parts of a semifinished product connected according to the invention.
  • FIG. 5 finally shows a concrete exemplary embodiment in which the predetermined breaking points on the semi-finished product are arranged according to the invention, once in a vertical section and
  • Figure 1 essentially serves to define the terms used here. If thread is spoken of in the following, all thread forms known in the art can of course be used here. Round threads, but also standard threads and special threads, such as the trapezoid thread shown here, are particularly widespread in plastics technology.
  • the thread 1 is formed by thread webs 2 and threads 4 running between them.
  • the invention of interest here is a hollow cylindrical section which can have either an external thread or an internal thread. In any case, however, the thread is formed on a cylinder wall 5.
  • the raised areas of the thread are referred to as thread webs, which on both sides of correspondingly inclined or rounded flanks, the thread flanks 3, are limited.
  • a thread turn 4 runs between two adjacent thread webs. The thread turn is delimited by the same thread flanks 3.
  • a semifinished product 10 is understood in general to mean an element which consists of two plastic parts which are manufactured together in one piece, but must be separated from one another in their end use state.
  • the semi-finished product 10 has an upper plastic part 11 and a lower plastic part 12 which is axially aligned below it.
  • the two plastic parts thus have a common axis and both parts each consist of an upper cylindrical section 13 and a lower cylindrical section 14. Further elements which are not important here can be connected to these two cylindrical sections. 'Way of example only is formed a flange 20 on the lower cylindrical portion fourteenth
  • the two cylindrical sections 13 and 14 each have a thread.
  • the upper cylindrical section 13 has an external thread 16 while the lower cylindrical section 14 has an internal thread 17.
  • These two plastic parts 11 and 12 are connected to one another in one piece via predetermined breaking points 15. It is advantageous from a manufacturing point of view to be able to make the predetermined breaking points 15 as large as possible in cross-section, since during production the entire semi-finished product can only be filled from one side during injection molding and consequently the material from the injection point through the predetermined breaking points 15 ins during injection molding other plastic part needs to be injection molded.
  • a semifinished product 10 is again shown in FIG.
  • the lower plastic part 12 is also designed as a lower cylindrical section 14 and has an internal thread 17.
  • the two parts 11 and 12 are connected to one another via several predetermined breaking points 15.
  • a gap 21 of practically any size can run between the two plastic parts 11 and 12, but this should in any case be smaller in the axial direction than the width of a threaded web 2.
  • the course of the predetermined breaking points 15 across the gap 21 must always be a combination of radial course direction and superimposed axial course direction in this type of construction, since on the one hand the cylindrical sections 13 and 14 must have different diameters in order to be screwable, and on the other hand there the gap 21 mentioned must be present, which must also be overcome. Consequently, the predetermined breaking points are always inclined concentrically to the axial direction.
  • the predetermined breaking points of the two connected plastic parts run in the virtual continuation of the web 2 or the webs 2 of the respective external thread 16.
  • the predetermined breaking points in the respective virtual continuation of the web of the internal thread 17 of the corresponding lower plastic part 12 Arrange lower cylindrical portion 14. It is essential, however, that none of the predetermined breaking points 15 intersect the virtual continuation of the flanks of the external thread or the internal thread.
  • the predetermined breaking points 15 run between the lower edge 18 of the upper plastic part 11 and the upper edge 19 of the lower plastic part 12.
  • the overall direction of the predetermined breaking points is a superimposition of an axial and radial alignment.
  • these components of the two course directions can also be separated by molding the bridges of the predetermined breaking points on the plastic part with the smaller diameter offset radially outward on the cylinder wall 5, while the same predetermined breaking points 15 are formed on Plastic part with the larger diameter is offset radially inwards, so that the predetermined breaking point between these two approaches can then run exactly axially.
  • FIG. 5 shows an embodiment of a semifinished product according to the invention in a concrete example of use.
  • the upper plastic part 11 represents a pouring bung
  • the lower plastic part 12 shows a specially designed cutting element, which runs in the assembled state in the internal thread of the bung.
  • the lower cylindrical section 14 is provided with an external thread 16
  • the bung which is shaped as an upper plastic part 11
  • has an upper cylindrical section 13 which has an internal thread 17 which is adapted to the external thread 16 has.
  • the additional external thread 22 is used to put on a screw cap.
  • the predetermined breaking points are partially recognizable here in section and one can see here the course direction of these predetermined breaking points 15 inclined to the axial alignment.
  • FIG. 6, which shows a top view of the semifinished product according to FIG. 5, illustrates how, according to the invention, the predetermined breaking points 15 can no longer be arranged regularly and practically anywhere, but, as shown here, arranged according to the course of the thread must be and consequently this results in a relatively disordered distribution.
  • this is of course particularly influenced by the situation of the type of thread used, and also depending on whether the thread is a single or multi-start thread.
  • the two cylindrical sections 13 and 14 are arranged at least partially coaxially in one another in an area in which no thread is arranged.
  • the lower edge and upper edge can also lie in a common plane.
  • this common plane must then be crossed by the predetermined breaking points, which are correspondingly conical to the common axis of both cylindrical sections.
  • the radius of the two cylindrical sections 13 and 14 differs, which with an internal thread. External threads are provided, which fit into each other by a little more than the thread height. Accordingly, the length of the radially running portions of predetermined breaking points should correspond at most to the height of the thread webs 2. If these are longer, this can result in disadvantageous friction effects.
  • the semifinished product can be a cutting element on the one hand and a pouring bung with a fastening flange on the other hand, the drawing shows.
  • the two plastic parts are, for example, parts of a container closure.
  • One part of it Adapter for mounting on a container and the other part a screw cap.
  • such components can also be used in so-called closures with a central sealing pin, or the semi-finished product can consist of a cylinder and a piston which can be screwed therein, wherein these two parts can be part of a metering device.
  • the semifinished product can also be two plastic parts that are part of two screwable areas of a multi-part cable coupling.
  • These preferred design variants essentially serve to demonstrate the diversity of the applications and are therefore not to be understood as conclusive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

Le plus fréquemment, pour des raisons de coût de fabrication, deux pièces en matière plastique qui doivent être ultérieurement assemblées, sont pré-positionnées d'une seule pièce, puis séparées lors du montage et définitivement assemblées. Conformément à l'invention, lesdites pièces (11, 12), qui sont chacune de section cylindrique (13, 14) présentant un filetage extérieur (16) et un filetage intérieur correspondant (17), sont revêtues par projection via des points destinés à la rupture (15). Les points destinés à la rupture sont disposés dans la prolongation virtuelle des filets (2). Des filetages plus étanches s'étendant de façon plus continue peuvent ainsi être réalisés.
PCT/CH2004/000143 2003-03-17 2004-03-11 Produit semi-fini en matiere plastique Ceased WO2004083054A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH428/03 2003-03-17
CH4282003 2003-03-17

Publications (1)

Publication Number Publication Date
WO2004083054A1 true WO2004083054A1 (fr) 2004-09-30

Family

ID=32996975

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2004/000143 Ceased WO2004083054A1 (fr) 2003-03-17 2004-03-11 Produit semi-fini en matiere plastique

Country Status (1)

Country Link
WO (1) WO2004083054A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007051328A1 (fr) * 2005-11-07 2007-05-10 Deltona Innovations Ag Systeme d'ouverture refermable realise a partir d'un produit semi-fini et procede pour son montage
WO2012146423A1 (fr) * 2011-04-26 2012-11-01 Robert Bosch Gmbh Fermeture à adaptateur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025960A (en) * 1989-12-05 1991-06-25 Risdon Corporation Dispenser with hollow drive rod
US5249695A (en) * 1991-03-05 1993-10-05 Portola Packaging, Inc. Spout fitment closure plug
EP1088764A1 (fr) * 1999-10-01 2001-04-04 Tetra Laval Holdings & Finance SA Moyen d'ouverture refermable pour emballages de produits alimentaires liquides

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025960A (en) * 1989-12-05 1991-06-25 Risdon Corporation Dispenser with hollow drive rod
US5249695A (en) * 1991-03-05 1993-10-05 Portola Packaging, Inc. Spout fitment closure plug
EP1088764A1 (fr) * 1999-10-01 2001-04-04 Tetra Laval Holdings & Finance SA Moyen d'ouverture refermable pour emballages de produits alimentaires liquides

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007051328A1 (fr) * 2005-11-07 2007-05-10 Deltona Innovations Ag Systeme d'ouverture refermable realise a partir d'un produit semi-fini et procede pour son montage
RU2414399C2 (ru) * 2005-11-07 2011-03-20 Делтона Инновейшнз Аг Запираемое открывающее устройство с полуфабрикатом и способ его монтажа
US8020729B2 (en) 2005-11-07 2011-09-20 Deltona Innovations Ag Closable opening device produced with a semifinished product and method of fitting the same
WO2012146423A1 (fr) * 2011-04-26 2012-11-01 Robert Bosch Gmbh Fermeture à adaptateur
US9067714B2 (en) 2011-04-26 2015-06-30 Robert Bosch Gmbh Closure with adapter
RU2594549C2 (ru) * 2011-04-26 2016-08-20 Роберт Бош Гмбх Укупорочное средство с переходником

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