GB2420311A - Method of making a container - Google Patents

Method of making a container Download PDF

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Publication number
GB2420311A
GB2420311A GB0425337A GB0425337A GB2420311A GB 2420311 A GB2420311 A GB 2420311A GB 0425337 A GB0425337 A GB 0425337A GB 0425337 A GB0425337 A GB 0425337A GB 2420311 A GB2420311 A GB 2420311A
Authority
GB
United Kingdom
Prior art keywords
container
pin
die
plastics material
slot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0425337A
Other versions
GB0425337D0 (en
Inventor
Steve Davis
David Alan Gibert White
Paul Dean
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.)
Promens Packaging Ltd
Original Assignee
Grabor Plastics Ltd
Polimoon Packaging Ltd
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 Grabor Plastics Ltd, Polimoon Packaging Ltd filed Critical Grabor Plastics Ltd
Priority to GB0425337A priority Critical patent/GB2420311A/en
Publication of GB0425337D0 publication Critical patent/GB0425337D0/en
Priority to PCT/GB2005/004441 priority patent/WO2006054089A1/en
Priority to EP05813703A priority patent/EP1824658A1/en
Publication of GB2420311A publication Critical patent/GB2420311A/en
Withdrawn legal-status Critical Current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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/04—Multi-cavity bottles
    • 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
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • 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
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B29C49/58—Blowing means
    • B29C2049/5837—Plural independent blowing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/075—Preforms or parisons characterised by their configuration having at least one internal separating wall
    • 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
    • B29C49/04116—Extrusion blow-moulding characterised by the die
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

A method of forming a container (100 figures 3a, 3b) comprises the steps of forming an assembly 10 comprising a pin 20 with a slot 25 received within a die 30, inserting plastics material into the aperture between the pin and the die and the slot of the pin causing the plastics material to conform to the shape of the die. Transferring the plastic material from the die to a mould and applying a pressurised gas to a portion of the plastic material to form the container such that the plastics material impelled into the slot of the pin forms a wall (130 figures 3a, 3b) within the container forming two separate container regions (110 and 120 figures 3a, 3b). The plastics material may be inserted into the aperture between the pin and the die by an extruder, wherein the plastics may be polyethylene, polyvinylchloride or polypropylene. A later embodiment relates to a container comprising an internal wall which forms separate container regions within the container.

Description

S. S S S * * * S. * * * I * S *I S S S S S S S $ * I I S I I ISS * I S S S
I I I -1- . I 55. *S* * * CONTAINER 2420311 The present invention relates to a container, and in particular to a container comprising two cavities.
It is well known to form an aggregate container having two compartments from two inter-engaging container components (see for example our earlier application GB 2 388 097). Such containers are of use for storing two different materials that need to be mixed prior to use but can not be stored together for a prolonged period of time. Whilst these aggregate containers are useful, there is a disadvantage in having to manufacture the two container components and then assembling them to form the aggregate container.
According to a first aspect of the present invention there is provided a method of forming a container, the method comprising the steps of: forming an assembly comprising a pin received within a die, the pin comprising a linear slot extending partially along the pin and parallel to the major axis of the pin and the die; inserting molten plastics material into the aperture formed between the pin and the die, the molten plastics material being inserted under pressure such that a portion of the plastics material is impelled into the slot of the pin; causing the plastics material to conform to the shape of the die; transferring the plastic material from the die to a mould; and applying a source of pressurised gas to a portion of the plastic material to form a container, wherein the plastics material impelled into the slot of the pin forms a wall within the container to form two separate container regions.
According to a second aspect of the present invention there is provided a container comprising an internal wall, the internal wall forming two separate S. S S * * * . * *. . S I S I * I SI * I I I I * * I I I I I * I 115 * S S I 8 S I S -2- * * container regions within the container. Preferably, the container comprises two apertures, each of the apertures being associated with the one of the separate container regions. The container may have a substantially round, elliptical, square or circular cross-section.
According to a third aspect of the present invention there is provided an arrangement for forming a container the arrangement comprising a pin located within a die, the pin comprising a central member received within a peripheral member, the central member of the pin comprising a slot extending across the width of the pin and partially along the height of the pin; and the pin being received within the die such that the pin is separated from the die by a second annular gap.
The invention will now be described, by way of example only, with reference to the following Figures in which: Figure 1 shows a first view of a schematic depiction of an assembly for use in accordance with the present invention; Figure 2 shows a second view of a schematic depiction of an assembly for use in accordance with the present invention, the second view being perpendicular to the first view shown in Figure 1; and Figure 3 shows a schematic depiction of a container made according to the method of the present invention.
Figure 1 shows a first view of a schematic depiction of an assembly 10 for used in accordance with the present invention. The assembly comprises pin which is received within die 30. Pin 20 comprises a central member 22 which is received centrally within annular member 24. The central member S *I * S S * * S I ** S * S S S * S IS S I I I I * * I I S I * I S **S * S I I S S * S -3- * . I.. IS* I 22 comprises a slot 25 that extends across the width of the lower portion of the central member of the pin, but only for a portion of the height of the central member. The pin further comprises first and second passages 27, 28 that extend along the length of the central member. The first and second passages are located on either side of the slot 25. The die 30 comprises an annular member 32 and the pin is received within the die such that there is an annular gap 33 between the annular member of the pin and the annular member of the die.
The assembly is used in a modified extrusion process, wherein molten plastic is extruded through the assembly 10. The molten plastic is extruded into the annular gap to produce a tube that adopts the shape of the aperture formed between the pin and the die. This tube is then transferred into a mould and pressurised gas is used to force the molten plastics material against the interior of the mould, such that the plastics material takes on the shape of the mould.
In an alternative embodiment of the invention, pressurised gas may be passed through first and second passages 27, 28 to reduce the possibility that the tube collapses or separates from the wall of the die. Once the tube is formed then it is transferred to the mould and the plastics material is blow moulded as described above.
In use, molten plastics material is extruded into the annular gap, between the pin and the outer annular member of the die. It has been found that due to the viscosity of the molten polymer, the polymer mainly remains within the annular gap and a relatively small mount flows into the slot in the central member. If a container comprising a continuous internal wall is to be formed I * I * I I ** * * . 8 8 * I 88 I S U I I * * . U I S I I I uS * * S I S S I I -4- 8 I III *S* S * then it is imperative that the slot in the central pin is filled with the polymer material.
It has been found that the slot can be suitably filled by reducing the gap on the end face 35, so that the pressure exerted on the plastics material by the extrusion process forces a portion of the plastics material into the slot such that the slot is filled. This causes a tube to be formed having a membrane across its middle, and a container can be formed from this parison using conventional blown extrusion moulding techniques.
The size of the gap 35 can be determined through experimentation and vary with the material being used and the weight and the size of the container to be formed. It has been found that the cross-sectional area of the gap 35 should be substantially equal to that of the slot 25.
Figure 2 shows a second view of a schematic depiction of an assembly for use in accordance with the present invention, the second view being perpendicular to the first view shown in Figure 1. Figure 2 shows in particular a cross-section through the middle of the central member 22 of the pin. This central section of the pin, which defines the shape of the slot formed within the pin, has a V-shape 26.
Figure 3 shows a schematic depiction of a container 100 made according to the method of the present invention, as described above. Figure 3 shows a front view of a container, Figure 3b shows a side view of the container, Figure 3c shows a top view of the container and Figure 3d shows an underside view of the container. The container 100 comprises two container sections 110 & 120 which are separated by internal wall 130.
Each of the container sections has an associated aperture 115, 125 through S 55 S S * * * * S *I S * S S S * S IS S S S * S S * I * S I S S * III * S * -0- * * S S which the contents of each container section may be dispensed. In use, a cap will be received on top of the container that may allow the contents of each container section to be mixed together as they are dispensed from the container or alternatively allows the contents to be dispensed separately..
Figure 3 shows that the two container sections are of substantially equal size, although it will be readily understood that that the relative size of each container portion may be varied. Figure 3 also shows that internal wall 130 takes the form of a straight line, essentially parallel to one of the axes of the container, It will be understood that the internal wall may be provided at a different angle.
Figure 3 shows that the container has a cross-section that is substantially rectangular with rounded-corners. It will be understood that other cross- sections may be used, for example square, circular, elliptical, etc. The container may be formed from any material compatible with the blown extrusion moulding process, for example and without limitation, high density polyethylene, polyvinyichloride, polypropylene, etc.

Claims (12)

U SU S U S S * I * ** * . S S S * I LI * S I U I S * I I U I I S U *IU * * * * * , e -0- U S IlU ISS S S CLAIMS
1. A method of forming a container, the method comprising the steps of: forming an assembly comprising a pin received within a die, the pin comprising a linear slot extending partially along the pin and parallel to the major axis of the pin and the die; inserting molten plastics material into the aperture formed between the pin and the die, the molten plastics material being inserted under pressure such that a portion of the plastics material is impelled into the slot of the pin; causing the plastics material to conform to the shape of the die; transferring the plastic material from the die to a mould; and applying a source of pressurised gas to a portion of the plastic material to form a container, wherein the plastics material impelled into the slot of the pin forms a wall within the container to form two separate container regions.
2. A method according to claim 1, wherein the die is configured such that the container is formed having two apertures.
3. A method according to claim 1 or claim 2, wherein the molten plastics material is inserted into the aperture formed between the pin and the die using an extruder.
4. A container comprising an internal wall, the internal wall forming two separate container regions within the container.
a, I I I I * * I II * * * * a * I II I I I I I I * a a S I * S I III 7 a I I I I I I - I I * *** *** S S
5. A container according to claim 4 wherein the container comprises two apertures, each of the apertures being associated with the one of the separate container regions.
6. A container according to claim 4 or claim 5, wherein the container has a substantially round, elliptical, square or circular cross-section.
7. An arrangement for forming a container, the arrangement comprising a pin located within a die, the pin comprising a central member received within a peripheral member, the central member of the pin comprising a slot extending across the width of the pin and partially along the height of the pin; and the pin being received within the die such that the pin is separated from the die by an annular gap.
8. An arrangement according to claim 7, wherein, in use, the arrangement is adapted to receive molten plastics material into the annular gap.
9. An arrangement according to claim 8, wherein, in use, the arrangement is adapted to receive molten plastics material under pressure so as to impel a portion of the molten plastics material into the slot of the central member of the pin.
10. A method substantially as described hereinbefore and with reference to the Figures. U 4 *
I U IS S U S I
* * SI * I * * *
I I S I I I I
* I S S * * -8- * * S..
11. A container substantially as described hereinbefore and with reference to the Figures.
12. An arrangement substantially as described hereinbefore and with reference to the Figures.
GB0425337A 2004-11-17 2004-11-17 Method of making a container Withdrawn GB2420311A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0425337A GB2420311A (en) 2004-11-17 2004-11-17 Method of making a container
PCT/GB2005/004441 WO2006054089A1 (en) 2004-11-17 2005-11-17 Method and arrangement for forming a container having an internal wall and container having an internal wall
EP05813703A EP1824658A1 (en) 2004-11-17 2005-11-17 Method and arrangement for forming a container having an internal wall and container having an internal wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0425337A GB2420311A (en) 2004-11-17 2004-11-17 Method of making a container

Publications (2)

Publication Number Publication Date
GB0425337D0 GB0425337D0 (en) 2004-12-22
GB2420311A true GB2420311A (en) 2006-05-24

Family

ID=33548429

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0425337A Withdrawn GB2420311A (en) 2004-11-17 2004-11-17 Method of making a container

Country Status (3)

Country Link
EP (1) EP1824658A1 (en)
GB (1) GB2420311A (en)
WO (1) WO2006054089A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2661871A (en) * 1950-04-17 1953-12-08 Alfred G Huenergardt Multiple liquid dispensing container
US3764250A (en) * 1971-11-01 1973-10-09 Graham Eng Corp Blow molding machine
GB2388097A (en) * 2002-04-23 2003-11-05 Grabor Plastics Ltd Aggregate container formed from separate parts

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH368615A (en) * 1957-09-27 1963-04-15 Plax Ag Process for manufacturing plastic bottles with several compartments, and bottle obtained by this process
FR2704841A1 (en) * 1993-05-06 1994-11-10 Cac Container for transporting and mixing any products.
US6319453B1 (en) * 1994-07-25 2001-11-20 Sprayex, Inc. Method of making a multiple neck spray bottle
JP3759775B2 (en) * 1995-12-21 2006-03-29 株式会社吉野工業所 Catamaran container
DE19926329A1 (en) * 1999-06-09 2000-12-21 Bernd Hansen Method for manufacturing containers and device for carrying out the method
US6602459B1 (en) * 2001-09-24 2003-08-05 Owens-Brockway Plastic Products Inc. Dual-chamber container, and method and apparatus for its manufacture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2661871A (en) * 1950-04-17 1953-12-08 Alfred G Huenergardt Multiple liquid dispensing container
US3764250A (en) * 1971-11-01 1973-10-09 Graham Eng Corp Blow molding machine
GB2388097A (en) * 2002-04-23 2003-11-05 Grabor Plastics Ltd Aggregate container formed from separate parts

Also Published As

Publication number Publication date
WO2006054089A1 (en) 2006-05-26
GB0425337D0 (en) 2004-12-22
EP1824658A1 (en) 2007-08-29

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Legal Events

Date Code Title Description
COOA Change in applicant's name or ownership of the application

Owner name: POLIMOON PACKAGING LIMITED

Free format text: FORMER APPLICANT(S): GRABOR PLASTICS LIMITED

WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)