GB2357990A - Arrangement for removing the trimming portions of a plastics blow-moulded bottle - Google Patents

Arrangement for removing the trimming portions of a plastics blow-moulded bottle Download PDF

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Publication number
GB2357990A
GB2357990A GB0029906A GB0029906A GB2357990A GB 2357990 A GB2357990 A GB 2357990A GB 0029906 A GB0029906 A GB 0029906A GB 0029906 A GB0029906 A GB 0029906A GB 2357990 A GB2357990 A GB 2357990A
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GB
Grant status
Application
Patent type
Prior art keywords
blow
dome
head
cutting
bottle
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Withdrawn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
GB0029906A
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GB0029906D0 (en )
Inventor
Lizarralde Beitialarrangoitia
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.)
UROLA S COOP
Original Assignee
* UROLA S COOP
UROLA S COOP
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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42Component parts, details or accessories; Auxiliary operations
    • B29C49/72Deflashing outside the mould
    • B29C49/74Deflashing the neck portion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04Extrusion blow-moulding

Abstract

The trimming portion removal system is coupled to a bottle neck trimmer unit 1 provided with a vertical and rotary cutting head 5,8, and comprises a removal device 8 built-in under the cutting head 5,8 and provided with means 9-13 for removing a surplus dome 2b previously trimmed from the bottle neck, and a collection subsystem 16-23 for collecting the successive trimmed domes 2b, in which subsystem a tray open 16 at the top and sliding horizontally under the head 5,8 collects each dome and a compressed air insufflator 18 takes it by way of a duct 19 to a hopper 22. The removing means includes an expanding fork 9 for retaining the trimmed blow-dome 2b on the cutting head 5,8. A proximity sensor 21 detects the passage of every dome 2b towards the hopper 22.

Description

2357990 System for removing the trimming portions of a plastic

blow-moulded bottle The present invention relates to the severing of a parison blowmoulded plastic bottle and in particular to the ancillary operations out of the mould for the removal and collection of the trimmings detached in severing.

Parison blow-moulded plastic bottles are subjected to a neck mouth severing process by which a surplus blow-dome is cut off to leave an even surface at the mouth of the bottle in order to assure a tight seal with a threaded cap.

In an automatic machine for trimming off the surplus blow-dome, the bottle feed is synchronised with the surplus blow-dome cutting device, and the latter with the anchoring and alignment of the bottle neck under the cutting device, as well as with the removal of the surplus blow-dome from the cutting device. Lastly, the bottle is moved away from the cutting device and since it is intended for containing beverages, no waste piece or scrap of the trimmed surplus blow-dome should reach its interior. For this purpose the bottle neck trimming machines should be supplemented with a system of automatic removal and collection of the blow-dome after trimming by means of which the trimming portion is removed from the cutting device for transfer to a collection system, which takes it to an external trimming portion container.

US-5787772 describes a machine for trimming the neck of a bottle by means of a rotary cutting head with a blade that detaches the surplus blow-dome from the bottle and removes it afterwards by means of a vacuum attraction system above the bottle, by way of a central passage in the head, depositing it finally in a container.

2 The present invention is directed towards providing an improved automatic removal system for the blow-moulded plastic bottle neck surplus blow-dome, which has been previously trimmed by a cutting head in a trimmer unit.

The present invention provides a trimmer unit for trimming a blow-dome from a plastics blow-moulded bottle including a removal system for removing the trimming portions, wherein the removal system comprises a removal device coupled to a movable cutting head in the trimmer unit, and wherein the removal device comprises means for temporarily retaining the trimmed blow-dome on the cutting head, and means for ejecting the retained blow-dome during a movement of the cutting head.

The retaining means may comprise resilient gripping or engagement means and these may be compressible during insertion or removal from the blow-dome; interior, expanding to engage the same after insertion.

The removal system may further comprise a collection subsystem for collecting the successively ejected bottle neck blow-domes. This subsystem may comprise a moving collection tray, preferably below the cutting head, and a gaseous flow may be provided, during use, to transfer the blow-domes from the collection tray to a collection means via a duct means.

The present invention further provides a system for removing the trimming portions of a blow-moulded bottle neck, comprising:

a vertical reciprocating movement cutting head, provided with a device for removing a surplus blow-dome previously trimmed from the bottle neck, wherein the removal device comprises means for retaining the trimmed blow dome on the cutting head, and means for ejecting the retained blow dome operating during a vertical movement of the cutting head; a subsystem for collecting the successive bottle neck blow-domes ejected from the cutting head, comprising a moving 3 dome collection tray in the form of a duct situated below the cutting head, a compressed air insufflator pointing towards the inside of the collection tray to take the blown dome to a collection hopper, and a proximity sensor that detects the passage of every dome towards the collection hopper; wherein, the removal system is built into a trimmer unit, and the blow moulded bottles are fed in and positioned individually under the cutting head by a grip mechanism synchronised with the collection subsystem.

Preferably, the collection tray has an opening in its upper face for the passage of the ejected dome, and performs a back and forth movement under the trimmer head impelled by the same compressed air insufflator. In a preferred trimmed bottle blow-dome removal system according to the invention the removal and collection of the successive trimmed blow-domes are synchronised with the cutting device and with the bottle unitary feed system, these last two systems belonging to a prior patent application under the name of the same holder. The removal system ensures that none of the trimmed blow-domes ejected downwards may drop into the bottle from which it has been cut off or into the immediately following one, which will be set in place automatically under the cutting device after the displacement of the preceding bottle.

In a preferred arrangement, the trimmer unit incorporating the blow-dome removal system has a vertical cylindrical head provided with a cutting blade, which cuts off the whole dome first in a descending movement over the bottle neck, and in a subsequent ascending movement a holding member mounted on the actual head retains the trimmed blowdome and then ejects the whole piece in a downward direction. The removal system preferably also includes a collection subsystem, located between the cylindrical cutting and removal head, and a trimmer unit mechanism for positioning 4 and aligning the bottle neck, and it collects the successive trimmed blow-domes, preferably monitoring their passage through a collection duct in order to make sure that every blow-dome is removed from the trimmer machine. The removal -5 system preferably discriminates the cases of absence of a bottle under the cutting device, when the passage of a trimmed blow-dome is not detected. The trimmed blow-domes may be recycled for use as plastic material in a subsequent bottle moulding process.

One preferred embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: FIG. 1 is a cross-sectional view of a bottle neck severing machine incorporating a trimming blow-dome removal system according to the invention.

With reference to figure 1, there is shown a trimmer unit 1, a blowmoulded bottle or container 2 with a neck 2a positioned upwards by an individual feeder (not shown in the drawings) belonging to the trimmer unit 1, and a removal system 10 according to the invention, coupled to the trimmer unit 1. The bottle 2 has a coaxial dome 2b on the neck 2a remaining after the moulding process, which has to be trimmed. The trimmer unit 1 also comprises a cam shaft 3 and a gripping mechanism 4 with two semicircular jaws 4a for securing and aligning the neck 2a, and a cylindrical vertical and rotary cutting head 5,8 which is situated under a horizontal table 7 of the trimmer unit 1. The horizontal movement of the jaws 4a for closing them against the neck 2a and for opening them is synchronised with the action of the head 5, 8 by means of the cam shaft 3.

The cutting head 5,8 comprises a cutting device 5 having a cylindrical central body 5a. and a vertical plain cutting blade 6, fixed to the outside edge of the central body Sa. To sever the mouth of the neck 2a, the head 5,8 descends and the blade 6 is inserted and cuts a rim of the neck 2a. A side flat or flange 14 on the cutting head has a shoulder that prevents the blow-dome from getting out of alignment during cutting.

The removal system 10 according to the invention comprises said rotary cutting head 5,8 having a removal device 8, and a subsystem 16-23 for collecting the successive trimmed blow-domes 2b, mounted on the trimmer unit 1 below the head 5,8.

The device 8 for detaching the trimmed blow-dome 2b from the neck, is coaxial with the cutting device 5, and comprises an expanding fork 9 which is inserted through the mouth of the dome 2b and holds it after cutting, a support disc 12 concentric with the central body Sa, which comes up against a bushing 11 in the table in its upward movement, and an ejection plate 13, which comes up against the dome 2b in its downward movement prior to cutting and then ejects the cut off dome 2b secured by the fork 9b in an ascending movement. When the head 5,8 performs its ascending travel and the support disc 12 comes up against the bushing 11, the cutting device 5 continues its upward movement, and the ejector plate 13 removes the dome 2b held by the fork 9 to the collection system 16-23.

The collection subsystem 16-23 comprises a horizontally sliding collection tray 16 below the head 5,8, which has a rectangular section and is open at the top, a blow tube 17 attached laterally to the collection tray 16 in order to exert pressure and move it by means of an air cylinder 23 synchronised with the grip mechanism 4, a duct 19 for receiving the trimmed domes 2b which clasps the collection tray 16 telescopically, a funnel 20 coupled to the protruding end of the duct 19, an infrared or laser light sensor 21, which detects the passage of a dome through the funnel 20, 6 and a hopper 22, which collects the domes 2b to deposit them in a crusher.

The blow tube 17 has a compressed air injector 18 at the free end to impel the trimmed domes 2b towards the duct 19.

This duct 19 is of rectangular section like the tray 16 and its upper side extends above the tray 16, being fixed to the table 7 by way of vertical plain support plates 15 adjacent to the head 5,8. This prevents the dome 2b ejected from the head 5,8 from shooting upwards under the thrust of the compressed air supplied by tube 17. This upper face of the fixed duct 19 has a round centre hole for the passage of the head 5, 8 towards the neck 2a of the bottle. By performing a back and forth movement, the collection tray 16, when it moves back from the machine, allows the head 5,8 to pass, which now descends to cut off the dome 2b. After this cutting operation, the tray 16 returns to its position under the head 5,8 to collect the trimmed dome 2b before it is ejected by the head 5,8 in its ascending movement.

7

Claims (8)

Claims
1 System for removing the trimming portions of a blow moulded bottle neck, comprising:
a vertical reciprocating movement cutting head, provided with a device for removing a surplus blow-dome previously trimmed from the bottle neck, wherein the removal device comprises means for retaining the trimmed blow dome on the cutting head, and means for ejecting the retained blow dome operating during a vertical movement of the cutting head; a subsystem for collecting the successive bottle neck blow-domes ejected from the cutting head, comprising a moving dome collection tray in the form of a duct situated below the cutting head, a compressed air insufflator pointing towards the inside of the collection tray to take the blown dome to a collection hopper, and a proximity sensor that detects the passage of every dome towards the collection hopper; wherein, the removal system is built into a trimmer unit, and the blow moulded bottles are fed in and positioned individually under the cutting head by a grip mechanism synchronised with the collection subsystem.
2. The removal system of claim 1, wherein said collection tray has an opening in its upper face f or the passage of the ejected dome, and performs a back and forth movement under the trimmer head impelled by the same compressed air insufflator.
3. A trimmer unit for trimming a blowdome from a plastics blow-moulded bottle including a removal system for removing the trimming portions, wherein the removal system comprises a removal device coupled to a movable cutting head in the trimmer unit, and wherein the removal device comprises means for temporarily retaining the trimmed blow-dome on the cutting head, and means for ejecting the retained blow-dome during a movement of the cutting head.
8
4. Apparatus for removing the trimming portions of a blowmoulded bottle neck substantially as hereinbefore described with reference to the accompanying drawing.
5. A method of removing the trimming portions of a blowmoulded plastic bottle, which method involves the use of apparatus as claimed in any one of the previous claims.
6. A bottle or container whenever produced by a method as claimed in claim 5.
7. A method of operating trimming apparatus substantially as hereinbefore described with reference to he accompanying drawing.
8. Any novel feature or combination of features hereinbefore described.
GB0029906A 1999-12-10 2000-12-07 System for removing the trimming portions of a plastic blow-moulded bottle Withdrawn GB0029906D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES9902712A ES2169639B1 (en) 1999-12-10 1999-12-10 Trimming the neck of a molded plastic bottle.
ES9903285U ES1045009Y (en) 1999-12-30 1999-12-30 Discharge system cuts a plastic bottle.

Publications (2)

Publication Number Publication Date
GB0029906D0 GB0029906D0 (en) 2001-01-24
GB2357990A true true GB2357990A (en) 2001-07-11

Family

ID=26155267

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0029906A Withdrawn GB0029906D0 (en) 1999-12-10 2000-12-07 System for removing the trimming portions of a plastic blow-moulded bottle

Country Status (1)

Country Link
GB (1) GB0029906D0 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465931A (en) * 1964-11-06 1969-09-09 Hoover Ball & Bearing Co Method of automatically trim finishing blow molded plastic articles
US3657406A (en) * 1968-10-18 1972-04-18 Solvay Method and apparatus for removing burrs formed on the neck of hollow bodies
US4037501A (en) * 1976-06-21 1977-07-26 Didde-Glaser, Inc. Through-the-cylinder slug out device
US4173447A (en) * 1978-09-05 1979-11-06 Ethyl Development Corporation Apparatus for contact cooling the neck moil of blown hollow containers
US5787772A (en) * 1995-04-19 1998-08-04 R & B Machine Tool Company Trim cutter method and apparatus for blow molded articles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3465931A (en) * 1964-11-06 1969-09-09 Hoover Ball & Bearing Co Method of automatically trim finishing blow molded plastic articles
US3657406A (en) * 1968-10-18 1972-04-18 Solvay Method and apparatus for removing burrs formed on the neck of hollow bodies
US4037501A (en) * 1976-06-21 1977-07-26 Didde-Glaser, Inc. Through-the-cylinder slug out device
US4173447A (en) * 1978-09-05 1979-11-06 Ethyl Development Corporation Apparatus for contact cooling the neck moil of blown hollow containers
US5787772A (en) * 1995-04-19 1998-08-04 R & B Machine Tool Company Trim cutter method and apparatus for blow molded articles

Also Published As

Publication number Publication date Type
GB0029906D0 (en) 2001-01-24 grant

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