GB2238974A - Securing neck inserts into moulds for plastics bottles - Google Patents
Securing neck inserts into moulds for plastics bottles Download PDFInfo
- Publication number
- GB2238974A GB2238974A GB8928173A GB8928173A GB2238974A GB 2238974 A GB2238974 A GB 2238974A GB 8928173 A GB8928173 A GB 8928173A GB 8928173 A GB8928173 A GB 8928173A GB 2238974 A GB2238974 A GB 2238974A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- bottle
- insert
- shell
- adhesive
- 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- Withdrawn
Links
- 229920003023 plastic Polymers 0.000 title abstract 2
- 239000004033 plastic Substances 0.000 title abstract 2
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- MWCLLHOVUTZFKS-UHFFFAOYSA-N Methyl cyanoacrylate Chemical compound COC(=O)C(=C)C#N MWCLLHOVUTZFKS-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 239000012945 sealing adhesive Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 3
- 239000012809 cooling fluid Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 2
- 239000004593 Epoxy Substances 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
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
- 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
- B29C49/48—Moulds
- B29C49/4823—Moulds with incorporated heating or cooling 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/306—Exchangeable mould parts, e.g. cassette moulds, mould inserts
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3828—Moulds made of at least two different materials having different thermal conductivities
-
- 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
- B29C49/48—Moulds
-
- 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
- B29C49/48—Moulds
- B29C2049/4874—Moulds characterised by the material, e.g. having different thermal conductivities or hardness
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
A bottle mould for a necked plastics bottle, comprises two mould shells (10) which fit together to define a mould cavity having a required bottle shape, each shell (10) each incorporating an insert (14) defining the required neck shape, e.g. a screw thread shape, each insert being fixed and sealed in position in the mould shell by an adhesive, e.g. cyano-acrylate, or epoxy, permitting replacement upon knocking out of the existing insert. Each insert may be located by a screw (24), whilst the adhesive is setting. It may be of aluminium bronze, or of berrylium copper alloy, to provide higher heat conductivity than the shell which may be of steel, or aluminum. The insert may be located in the shell at a respective semi-circular rib (16) and groove (18). <IMAGE>
Description
Improvements in Bottle Moulds
This invention relates to a mould for the production of necked bottles, in particular moulded plastics bottles.
A problem in the moulding of necked bottles lies in the formation of the bottle neck. Typically the mould shells defining the shape of the bottle each comprise a plurality of parts, which include a part specifically dedicated to formation of the bottle neck. The design of this part of the mould shell is often difficult, partly because during moulding there is a special requirement for a higher rate of transfer of heat out of the moulding material at this region of the mould than at the main body of the mould cavity where the bottle wall is formed. An object of the invention is to provide assistance in the solution of this problem.
According to the invention, there is provided a bottle mould for a necked bottle, comprising two mould shells which fit together to define a mould cavity having the required bottle shape, wherein in the region of the cavity where the neck is tc be formed the mould shells incorporate respective inserts defining the shape required for the bottle neck, each insert being fixed to the adjacent part of the mould shell in which it is incorporated by means of a fixing and sealing adhesive
Preferably, the insert is formed of a metal or alloy of higher heat conductivity than the main portion of the mould shell. For example, whereas the main portion of the mould shell may be made of steel or aluminium, the insert may be made of aluminium-bronze or beryllium-copper alloy.
The insert is preferably generally in the form of a semicylindrical member having an external circularly extending rib which locates in a corresponding groove in a semicylindrical recess in the adjacent part of the mould shell.
Passages in the said mould shell part behind a portion of the length of the groove may provide for passage of cooling fluid, and an adjacent portion of the rib of the insert may be cut away to assist fluid flow.
Additionally, a hole in the said mould shell part may provide for insertion, through said part and into the insert, of a holding screw which holds the insert in position while the fixing and sealing adhesive is setting. The screw can be left in place after serving its purpose, but is subsequently removable if desired.
A convenient adhesive is a commercially available adhesive of the cyano-acrylate or epoxy resin type.
The insert is usually cut on its interior wall with a formation for production of a screwthread on the bottle neck or a formation for any other convenient kind of bottle closure such as a push-on cap. One advantage of the invention, amongst others, is that the insert can be knocked out for replacement by another insert having formations for producing a different screwthread. Moreover, replacement of the insert for any other reason is also readily possible, without requiring any redesign of any one or more main parts of the mould shell.
An embodiment of the invention is illustrated by way of example in the following description, making reference to the accompanying drawings, in which:
Figure 1 is a plan view of a bottle mould shell; and
Figures 2 and 3 are respectively cross-sectional views on
the lines 2-2 and 3-3 of Figure 1.
The drawings show one shell 10 of a pair of similar mould shells which are brought together to define the shape of the mould cavity in which the bottle is produced by blow moulding, in a conventional manner.
The mould shell 10 has a main body 12, provided with not shown cooling channels, and which in practice may be formed in a plurality of separate but united members or parts, and for production of the bottle neck, an insert 14 which is fixed in position to the adjacent part of the main body by a fixing and sealing adhesive, such as a cyano-acrylate or an epoxy resin adhesive.
The insert 14 comprises a generally semi-cylindrical element or ring having an external rib 16 which fits into a corresponding semi-circular groove 18 in a semi-cylindrical recess 20 in the main body 12 of the shell. The fixing and sealing adhesive is employed at the mating semi-cylindrical surfaces of the recess 20 and the insert 14, although preferably not at the cooperating rib 16 and groove 18.
Behind the insert 14 the main body 12 is formed with a screw hole 22. A holding screw 24 passes through this hole 22 to hold the insert in position while the adhesive is setting.
Means are also provided for passage of cooling water for extracting heat from the moulding material in the region of the neck, via the insert 14, which is made of a high heat conductivity alloy such as aluminium-bronze or beryllium copper. The main shell body 12 may be formed of steel or aluminium, being a less expensive metal of lower heat conductivity. Thus, a water inlet is indicated at 26; a corresponding water outlet is above the plane of the cross-section of Figure 2. A portion of the rib 16 of the insert 14 is cut away, as indicated at 28, to enable cooling water to flow into the cut away below the plane of Figure 2, upwardly at the cut away and out of the cut away above the plane of Figure 2.
The insert is machined on its inside surface with a formation (not shown) for a bottle closure, e.g. a screwthread.
Various modifications of the above-described and illustrated arrangement are possible within the scope of the invention hereinbefore defined.
Claims (11)
1. A bottle mould for a necked bottle, comprising two mould shells which fit together to define a mould cavity having the required bottle shape, wherein in the region of the cavity where the neck is to be formed the mould shells incorporate respective inserts defining the shape required for the bottle neck, each insert being fixed to the adjacent part of the mould shell in which it is incorporated by meansof a fixing and sealing adhesive.
2. A bottle mould according to claim 1, wherein, in each mould shell, the insert is formed of a metal or alloy of higher conductivity than the main portion of the shell.
3. A bottle mould according to claim 2, wherein the main portion of the mould shell is made of steel or aluminium and the insert is made of aluminium-bronze or berylliumcopper alloy.
4. A bottle mould according to any of claims 1 to 3, wherein, in each mould shell, the insert is in the form of a semi-cylindrical member having an external circularly extending rib which locates in a corresponding groove in a semi-circular recess in the adjacent part of the mould shell.
5. A bottle mould according to claim 4, wherein passages in the mould shell behind a portion of the length of the groove provide for passage of cooling fluid.
6. A bottle mould according to claim 5, wherein an adjacent portion of the rib of the insert is cut away to provide for passage of the cooling fluid.
7. A bottle mould according to any of claims 1 to 6, wherein, in each mould shell, a hole therein provides for passage of a holding screw which holds the insert in position while the adhesive is setting.
8. A bottle mould according to any of claims 1 to 7, wherein the adhesive is of the cyano-acrylate or the epoxy resin type.
9. A bottle mould according to claim 4 or any claim appendant thereto, wherein the adhesive is employed at the mating semi-cylindrical surfaces of each mould shell and insert, but not at the cooperating rib and groove.
10. A bottle mould according to any of claims 1 to 9, wherein the composite insert is cut on its interior wall with a formation for producing a screwthread or other fitment for a bottle closure.
11. A bottle mould substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8928173A GB2238974A (en) | 1989-12-13 | 1989-12-13 | Securing neck inserts into moulds for plastics bottles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8928173A GB2238974A (en) | 1989-12-13 | 1989-12-13 | Securing neck inserts into moulds for plastics bottles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8928173D0 GB8928173D0 (en) | 1990-02-14 |
| GB2238974A true GB2238974A (en) | 1991-06-19 |
Family
ID=10667892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8928173A Withdrawn GB2238974A (en) | 1989-12-13 | 1989-12-13 | Securing neck inserts into moulds for plastics bottles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2238974A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0742094A1 (en) * | 1994-01-28 | 1996-11-13 | Asahi Kasei Kogyo Kabushiki Kaisha | Blow molding die and method of manufacturing same |
| EP0847846A3 (en) * | 1996-11-13 | 1998-09-23 | Superseal Corporation | Bottle mold with adjustable top block assembly and top block alignment members |
| EP2230065A1 (en) * | 2009-03-20 | 2010-09-22 | A.R.C.I.L. | Thermoforming mould with thermal insulation and associated method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB738403A (en) * | 1951-12-21 | 1955-10-12 | Philips Nv | Improvements in or relating to methods of securing electrolytic deposited metal skins and matrices manufactured by such methods |
| GB1182167A (en) * | 1967-08-18 | 1970-02-25 | Colgate Palmolive Co | Manufacture of Pressed Indicia-Bearing Bodies of Material. |
| GB1197727A (en) * | 1966-08-20 | 1970-07-08 | British United Shoe Machinery | Improvements in or relating to Moulding. |
| GB1362252A (en) * | 1970-07-23 | 1974-07-30 | Korsch E Korsch Korsch Spezial | Maschinen emil split blow mould for the production of hollow articles of thermo- plastic synthetic materials |
| GB1395664A (en) * | 1972-09-28 | 1975-05-29 | Kureha Chemical Ind Co Ltd | Blow moulding of thermoplastic materials |
| GB1529192A (en) * | 1974-09-30 | 1978-10-18 | Drostholm F H | Mould structures |
| GB2187131A (en) * | 1986-02-05 | 1987-09-03 | Showa Denko Kk | Injection moulds |
-
1989
- 1989-12-13 GB GB8928173A patent/GB2238974A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB738403A (en) * | 1951-12-21 | 1955-10-12 | Philips Nv | Improvements in or relating to methods of securing electrolytic deposited metal skins and matrices manufactured by such methods |
| GB1197727A (en) * | 1966-08-20 | 1970-07-08 | British United Shoe Machinery | Improvements in or relating to Moulding. |
| GB1182167A (en) * | 1967-08-18 | 1970-02-25 | Colgate Palmolive Co | Manufacture of Pressed Indicia-Bearing Bodies of Material. |
| GB1362252A (en) * | 1970-07-23 | 1974-07-30 | Korsch E Korsch Korsch Spezial | Maschinen emil split blow mould for the production of hollow articles of thermo- plastic synthetic materials |
| GB1395664A (en) * | 1972-09-28 | 1975-05-29 | Kureha Chemical Ind Co Ltd | Blow moulding of thermoplastic materials |
| GB1529192A (en) * | 1974-09-30 | 1978-10-18 | Drostholm F H | Mould structures |
| GB2187131A (en) * | 1986-02-05 | 1987-09-03 | Showa Denko Kk | Injection moulds |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0742094A1 (en) * | 1994-01-28 | 1996-11-13 | Asahi Kasei Kogyo Kabushiki Kaisha | Blow molding die and method of manufacturing same |
| EP0742094A4 (en) * | 1994-01-28 | 1998-05-06 | Asahi Chemical Ind | Blow molding die and method of manufacturing same |
| EP0847846A3 (en) * | 1996-11-13 | 1998-09-23 | Superseal Corporation | Bottle mold with adjustable top block assembly and top block alignment members |
| EP2230065A1 (en) * | 2009-03-20 | 2010-09-22 | A.R.C.I.L. | Thermoforming mould with thermal insulation and associated method |
| FR2943268A1 (en) * | 2009-03-20 | 2010-09-24 | Arcil | THERMALLY INSULATING THERMOFROMING MOLD AND ASSOCIATED METHOD. |
| US8714962B2 (en) | 2009-03-20 | 2014-05-06 | A.R.C.I.L. | Thermoforming mould with thermal insulation and associated method |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8928173D0 (en) | 1990-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |