EP2199042A1 - Chamfering equipment for cylindrical stoppers - Google Patents
Chamfering equipment for cylindrical stoppers Download PDFInfo
- Publication number
- EP2199042A1 EP2199042A1 EP08172201A EP08172201A EP2199042A1 EP 2199042 A1 EP2199042 A1 EP 2199042A1 EP 08172201 A EP08172201 A EP 08172201A EP 08172201 A EP08172201 A EP 08172201A EP 2199042 A1 EP2199042 A1 EP 2199042A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- barrel
- stopper
- chamfering
- station
- carousel
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/16—Cutting rods or tubes transversely
- B26D3/162—Cutting rods or tubes transversely cutting tubes obliquely
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
- B26D7/0608—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by pushers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/02—Bevelling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/16—Cutting rods or tubes transversely
- B26D3/166—Trimming tube-ends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
- B26D7/0641—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form using chutes, hoppers, magazines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
- B26D7/0683—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for elongated articles
Definitions
- Stoppers made from cork obtained from the cork oak have traditionally been used to close bottles such as wine bottles. In use, the cork is inserted into the neck of the bottle where its inherent elasticity enables it to expand to seal the neck such that the ingress of air is reduced and the contents of the bottle are prevented from escaping from the bottle.
- numerous disadvantages associated with the use of natural corks have been identified, such as their cost, scarcity, and unequal quality. Accordingly, alternatives to natural cork have been sought.
- One alternative solution is to produce a stopper wholly from synthetic materials. In general such stoppers are produced to resemble the natural corks in color to yield a higher acceptability from the consumer. Again, mono-component synthetic stoppers made e.g.
- core-skin stoppers could theoretically be produced by injection molding, the production costs would be too high. It is generally preferred to produce core-skin stoppers by co-extrusion thus forming a continuous elongated member which is thereafter cut at the desired length to form the individual stoppers as also explained in US2003/0161985 . In this case, the chamfers at the edges of the stoppers must be formed after -or upon- cutting the elongated member into individual stoppers.
- EP-A1-1493681 discloses a process for producing synthetic bi-layered bottle closures provided with chamfered edges wherein the beveled ends are obtained by a grinding process.
- a problem with the grinding process is that as material is ground away from the edges, shavings and dust may electrostatically adhere to the surfaces of the stopper and thus contaminate the liquid contained in the container the stopper is inserted into.
- the present invention also concerns a hollow barrel for tightly holding and centring a cylindrical stopper suitable for the apparatus as above-described, consisting of a hollow cylinder of length and diameter larger than the stopper to be engaged therein, wherein the hollow barrel comprises at least nine spherical balls mounted in, and protruding from recesses located in the inner wall of the barrel, disposed on at least three points round its circumference to define a polygonal passageway normal to the barrel's axis of revolution, and distributed on at least three rows along the length of the barrel, the balls being mounted so as to resiliently engage deeper into their corresponding recesses when pressed in, thus enlarging the passage defined thereby to accommodate the stopper.
- the hollow barrel comprises at least nine spherical balls mounted in, and protruding from recesses located in the inner wall of the barrel, disposed on at least three points round its circumference to define a polygonal passageway normal to the barrel's axis of revolution, and distributed on at least three rows along the length of
- the carousel 6 shall be associated with means for rotating the carousel 6 and shall preferably comprise at least three cylindrical hollow barrels 11, 21, 31.
- the dispensing station 4 and loading station 1 preferably correspond to a same position of the carousel 6, and are located at opposite sides of the panel.
- the carousel 6 of the present invention comprises cylindrical hollow barrels 11, 21, 31 which function is to hold in place the stoppers to be chamfered and to rotate during the chamfering operations.
- Theoretically a single barrel hopping from one station to the next one would suffice to successfully complete the chamfering operation, but in practice this is not satisfactory for insufficient production rates.
- the carousel 6 comprises enough barrels distributed round its circumference to occupy all the stations 1-4 at each rotational increment.
- the resilient means 14 may be a spring or an elastomeric element.
- the elastomeric element has the shape of a diabolo, i.e., a prism of revolution with a restricted section in the middle.
- the force required to engage the ball into the recess such as to allow the passage of a stopper must be sufficiently low to permit an easy introduction of a fresh stopper 10 into, and extraction of a fully chamfered stopper 10b out of the barrel, and sufficiently high so as to hold the stopper in place during the chamfering operations.
- the balls 12 are separated from the resilient means 14 by a low friction element (e.g., in PTFE, POM, HDPE) to facilitate the translation of the stopper along the barrel by allowing a certain level of rotation of the balls. Care should be taken that the level of rotation of the balls should be sufficiently low so as to ensure that the stoppers follow the rotational movement of the barrel during a chamfering operation.
- a low friction element e.g., in PTFE, POM, HDPE
- the second chamfering station 3 is a mirror reproduction of the first chamfering station 2 and comprises the same elements but disposed on opposite sides of the carousel.
- barrel 11 faces means 35, preferably a piston, which pushes the stopper 10a partly out of the barrel 11 until it reaches stopping means 38 to expose the un-chamfered edge still to be chamfered to a rotating blade 36a (cf. Fig.1 &6).
- the exposed edge is chamfered over its whole circumference (cf. Fig.2 ).
- a fourth barrel is not necessary to complete the chamfering cycle as first barrel 11 faces on one side thereof the dispensing station 4 and on the other side the loading station 1. It is possible, albeit less preferred, to have loading station 1 and dispensing station 4 corresponding to different positions on the carousel, but then a fourth barrel is required to ensure that each station is occupied by a barrel at each stage of the chamfering cycle.
- stopper 10b having both ends chamfered is pushed out of the barrel 11.
- this operation is preferably carried out by introducing a fresh stopper 10 from the feeding line 5, thus expulsing the chamfered stopper 10b (cf. Fig.1 &4).
- a piston may be used to simply push out the chamfered stopper, but this solution is less preferred as it requires a larger number of barrels and a larger carousel to accommodate a sequence of four stops, instead of three as illustrated in Fig.1 .
- Providing a carousel with 3 x N barrels serving N station sequences 1-4 increases by a factor N the production rate or output of the apparatus.
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- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
Description
- The present invention relates to the machining of closures or stoppers for containers containing fluids, such as low viscosity liquids, pastes, or low pressure gases, and particulate solids. More specifically, the present invention is directed to apparatuses for chamfering the ends of cylindrical stoppers, particularly synthetic ones.
- Stoppers made from cork obtained from the cork oak have traditionally been used to close bottles such as wine bottles. In use, the cork is inserted into the neck of the bottle where its inherent elasticity enables it to expand to seal the neck such that the ingress of air is reduced and the contents of the bottle are prevented from escaping from the bottle. However, numerous disadvantages associated with the use of natural corks have been identified, such as their cost, scarcity, and unequal quality. Accordingly, alternatives to natural cork have been sought. One alternative solution is to produce a stopper wholly from synthetic materials. In general such stoppers are produced to resemble the natural corks in color to yield a higher acceptability from the consumer. Again, mono-component synthetic stoppers made e.g. of a polymer or a foamed resin have been unable to satisfy all of the stringent requirements associated therewith. More recently, multi-component/multi-layer synthetic closures have been shown to provide numerous advantages over the synthetic, mono-component stoppers known in the art. Such closures are typically of the core-sheath (or core-skin) type comprising a foamed core and an outer layer peripherally surrounding the core member.
- In parallel, it has been well known in the art of bottle stoppers that by incorporating a beveled edge or a chamfer to the ends of the closures, correct entry and acceptable insertion into the neck of a bottle is greatly facilitated. Chamfered edges are particularly advantageous for core-skin stoppers as they greatly reduce the risk of delamination caused by the sheath being turned inside out upon incorporation of the stopper into the bottle neck. In case stoppers are produced by injection molding, the chamfered edges can be formed in-mold by providing the corresponding mold geometry to form a product with the final shape desired as described in
US2003/0161985 . Injection molding, however, is most suitable for the production of stoppers having a single component. Although core-skin stoppers could theoretically be produced by injection molding, the production costs would be too high. It is generally preferred to produce core-skin stoppers by co-extrusion thus forming a continuous elongated member which is thereafter cut at the desired length to form the individual stoppers as also explained inUS2003/0161985 . In this case, the chamfers at the edges of the stoppers must be formed after -or upon- cutting the elongated member into individual stoppers. - Examples of extruded multi-layered synthetic stoppers provided with chamfers are described e.g. in
US2003/0161985 ,US-B1-6,221,450 and inUS-A1-2006/0035074 . No details as to how the chamfer is obtained are, however, provided therein.US2006/0222800 discloses a method of treating a stopper made of expanded plastic material including heat shrinking the ends of the stopper to effect a beveled edge. However, the heat shrinking treatment is not without affecting the structure and properties of the resulting stopper and the production rate is limited. An alternative solution is described inEP-A1-1493681 which discloses a process for producing synthetic bi-layered bottle closures provided with chamfered edges wherein the beveled ends are obtained by a grinding process. A problem with the grinding process, however, is that as material is ground away from the edges, shavings and dust may electrostatically adhere to the surfaces of the stopper and thus contaminate the liquid contained in the container the stopper is inserted into. - It appears from the technical solutions described in the literature, that there still remains a need for reliably, hygienically, economically, and rapidly providing a chamfer at the edges of cylindrical stoppers. It is therefore an objective of the present invention to provide an apparatus for chamfering the ends of cylindrical stoppers capable of fulfilling such requirements. It has now been found that the above objective can be met by providing an apparatus according to the present invention.
- The present invention is defined in the appended independent claims. Preferred embodiments are defined in the dependent claims.
- The present invention concerns an apparatus for chamfering the first and second ends of cylindrical stoppers comprising:
- (a) a feeding line, feeding the cylindrical stoppers to a loading station of a carousel,
- (b) the loading station comprising means for engaging the first stopper at the end of the feeding line into a first cylindrical hollow barrel suitable for holding the stopper in position;
- (c) means for rotating the carousel so as to drive the first barrel loaded with a cylindrical stopper to a first chamfering station, while a second barrel is brought to the loading station;
- (d) the first chamfering station comprising:
- (i) means for bringing into chamfering position a first end of the stopper engaged in the barrel located at the station;
- (ii) means for rotating the barrel and the stopper engaged therein with respect to their common axis of revolution;
- (iii) a rotating blade tilted at an angle corresponding to the desired chamfering angle;
- (e) means for rotating the carousel so as to drive the barrel loaded with a cylindrical stopper chamfered at one end to a second chamfering station, while the second barrel loaded with a fresh stopper is brought to the first chamfering station;
- (f) the second chamfering station comprising:
- (i) means for bringing into chamfering position the second, un-chamferd end of the stopper engaged in the barrel located at the station;
- (ii) means for rotating the barrel and the stopper engaged therein with respect to their common axis of revolution;
- (iii) a rotating blade tilted at an angle corresponding to the desired chamfering angle; and
- (g) means for rotating the carousel so as to drive the barrel loaded with a cylindrical stopper chamfered at both ends to a dispensing station, while the second barrel loaded with a stopper chamfered at one end is brought to the second chamfering station.
- The present invention also concerns a hollow barrel for tightly holding and centring a cylindrical stopper suitable for the apparatus as above-described, consisting of a hollow cylinder of length and diameter larger than the stopper to be engaged therein, wherein the hollow barrel comprises at least nine spherical balls mounted in, and protruding from recesses located in the inner wall of the barrel, disposed on at least three points round its circumference to define a polygonal passageway normal to the barrel's axis of revolution, and distributed on at least three rows along the length of the barrel, the balls being mounted so as to resiliently engage deeper into their corresponding recesses when pressed in, thus enlarging the passage defined thereby to accommodate the stopper.
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FIG.1 is a schematic representation of an apparatus according to the present invention, wherein different phases of the apparatus in operational mode are represented. -
FIG.2 is a perspective view of a chamfering operation -
FIG.3 represents the carousel comprising three cylindrical hollow barrels together with means for rotating the carousel and means for rotating the barrels. -
FIG.4 is a view of the loading station of the carousel, wherein a fresh stopper has just been engaged in the first hollow barrel, and of the dispensing station where the stoppers with both ends chamfered are dispensed -
FIG.5 is a view of the first chamfering station of the carousel, wherein the fresh stopper is being chamfered at one end by a rotating blade. -
FIG.6 is a view of the second chamfering station of the carousel, wherein the stopper chamfered at one end is being chamfered at its un-chamfered end by another rotating blade. -
FIG.7a represents a simplified cross-sectional side view and a simplified cross-sectional front view of a hollow barrel according to the invention, wherein the hollow barrel is free of stoppers. -
FIG.7b represents the hollow barrel represented inFIG.7a wherein a stopper is engaged in the hollow barrel. -
FIG.8 represents a carousel comprising N = 3 sequences of loading, first and second chamfering, and dispensing stations in a single carousel. -
FIG.9 represents a rotating blade mounted on a guide allowing the control of the chamfering angle. - For the purposes of promoting and understanding the principles of the present invention, reference will be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. While this invention is susceptible of embodiments in many different forms, this specification and the accompanying drawings disclose specific forms as examples of the invention. However, the invention is not intended to be limited to the embodiments so described.
- In the context of the present invention, the term "stopper" encompasses any stopper which may be inserted into a receptacle to close an opening in the receptacle. Accordingly, the expression "cylindrical stopper" used hereinafter is meant to refer to any stopper which is substantially cylindrical prior to its insertion into the receptacle opening and which is made of any commonly known material such as natural cork or synthetic material, as well as multi-layer, core-skin synthetic stoppers. Suitable synthetic stoppers for use in the context of the present invention are e.g. described in
US2003/0161985 . - As represented in
FIG.1 , the apparatus for chamfering the ends of cylindrical stoppers according to the present invention comprises four main stations: aloading station 1, afirst chamfering station 2, asecond chamfering station 3, and a dispensingstation 4, preferably located adjacent to the loading station. Thecylindrical stoppers 10 to be chamfered are sequentially supplied to these four main stations, via suitable rotation of acarousel 6. - The apparatus according to the present invention comprises a
carousel 6.Carousel 6 for use herein may have any suitable configuration, form or dimension provided that the latter is capable of bringing thecylindrical stoppers 10 sequentially from theloading station 1, to thefirst chamfering station 2, then to thesecond chamfering station 3, and finally to the dispensingstation 4. Suitable form and dimensions of thecarousel 6 for use in the context of the present invention may be easily identified by those skilled in the art. According to a preferred execution, thecarousel 6 takes the form of a disc, as represented inFIG.3 and8 . Preferably, thecarousel 6 for use herein is mounted on a vertical panel (not represented) having first and second opposite main surfaces. - In order for the
carousel 6 to be able to bring thecylindrical stoppers 10 to the four main stations of the apparatus according to the invention, thecarousel 6 shall be associated with means for rotating thecarousel 6 and shall preferably comprise at least three cylindricalhollow barrels Fig.1 , the dispensingstation 4 andloading station 1 preferably correspond to a same position of thecarousel 6, and are located at opposite sides of the panel. In order to increase the output of the chamfering apparatus, it is preferred that more than a single sequence of the four main stations are distributed round the carousel. For instance, as illustrated inFig.8 the carousel may comprise N = 3 sequences of aloading station 1, a first and second chamfering stations 2&3, and a dispensingstation 4. - The rotation of the
carousel 6 may be driven by amotor 20 to impart a sequential stop/go motion to the carousel, each rotation thereof bringing the stoppers from one station to the next and remaining in place for the whole duration of the treatment at each station. The time the carousel stops at each station is generally around 0.3-1.0 s, preferably around 0.5 s, which is sufficient time to load a fresh stopper atloading station 1, to chamfer one end of the stopper atstations station 4, which is usually located opposite theloading station 1. The speed of rotation of the carousel to bring each stopper from one station to the next depends on the desired output rate. It is clear that it should be as high as possible, since no chamfering may occur during rotation of the carousel. As an example, for a carousel comprising N = 3 sequences of stations 1-4, the carousel operates 1/9 of a revolution in less than 0.5 s, typically between 0.1 and 0.3 s. - The
feeding line 5, feeds freshcylindrical stoppers 10 to aloading station 1 reachable by abarrel carousel 6. When abarrel 11, either empty or loaded with a stopper having both ends chamfered, is located at loadingstation 1 it is ready to receive a fresh stopper fed from feedingline 5. The feeding line can have any geometry suitable for said purpose. As represented inFig.1 ,3 and4 it can be in the form of a vertical rack which bottom opens facing theloading station 1. When a stopper is inserted by engagingmeans 15 into thebarrel 11 located at theloading station 1 the next stopper comes into loading position in the rack by gravity. Other configurations can be considered. For instance, it is possible to feed the stoppers in a line following the cutting of the stoppers out of the extruded elongated member. Alternatively, a carousel can be used. - Suitable means 15 for engaging a
fresh stopper 10 into the corresponding cylindricalhollow barrel FIG.1 &4, suitable for pushing afresh stopper 10 into the corresponding cylindrical hollow barrel. Preferably, by pushing afresh stopper 10 intobarrel 11, astopper 10b chamfered at both ends is pushed out off the other side of the barrel into a dispensingstation 4. - The first and
second chamfering stations - (i) means 25, 35 for bringing into chamfering position one un-chamfered end of the
stopper barrel stations - (ii) means for rotating
barrel stopper - (iii) a
rotating blade - Theoretically, chamfering one end only of the stoppers should suffice, since the chamfer serves the sole purpose to facilitate the engagement of one end of the stopper into the opening of a container. In practice, however, there is no way to control which end of the stopper is presented to the container's opening and it is essential that both ends of the stoppers be chamfered. For this reason, the apparatus of the present invention comprises a first and a second chamfering stations.
- The means 25, 35 for bringing into chamfering position one end of the
stopper barrel barrel means rotating blade Fig.1 ,5 and6 ). - Optimal chamfering of the stoppers is obtained according to the present invention by a combination of a
rotating blade Fig.2 . Rotation of the stopper to be chamfered is provided by rotating the barrel in which it is engaged and firmly held in place. Rotation of the barrels may be driven by a motor connected to transmission means into which the barrels engage upon moving into the first andsecond chamfering stations sling 23 running between a driving wheel connected to the motor and one or more idle wheels (two idle wheels are represented inFig.3 ), one of the idle wheels being provided with tensioning means to ensure the sling is always under tension. As illustrated inFig.3 thebarrels sling 23 as they come into position atchamfering stations stations - The
rotating blade circular blade Fig.2 ,5 ,6 , and9 ). As illustrated inFig.9 , the rotating blade is preferably slidingly mounted on aguide 40, said guide forming a circle segment centred on the point wherein the rotating blade (26a, 36a) intercepts the edge of the stopper (10, 10a), such that sliding along the guide varies the chamfering angle, but not the chamfering depth. Other types of blade positioning guides 40 may be used, such as a simple two or three degree of freedom translation means, but the slidingguide 40 represented inFig.9 has the advantage of maintaining constant the relative position of the blade's cutting edge and the stopping means 28, 38. - The chamfering angle is generally around 45 deg more or less 15 deg, i.e., it generally varies between 30 and 60 deg, although any angle could be chamfered with the present apparatus. The chamfering depth is usually comprised between 0.5 and 1.0 mm for wine bottles, but can reach up to about 3.0 mm for sweet wines, like port or brandy bottles.
- Rotating blades are advantageous over static blades as the latter rapidly become too blunt to ensure clean chamfered edges. According to the apparatus of the present invention, the
blade - The apparatus according to the present invention further comprises a dispensing
station 4, the role of which is to extract from the barrel and dispense into a dispensing linecylindrical stoppers 10b having both ends chamfered. - According to a preferred execution of the present invention, the dispensing
station 4 is located on the opposite side of the carousel as the loading station;loading station 1 and dispensingstation 4 therefore correspond to the same position of abarrel Fig.1 &4) and one end of said barrel faces theloading station 1, whilst the other end faces the dispensingstation 4. This configuration has the advantage that when a barrel loaded with astopper 10b having both ends chamfered reaches the dispensingstation 4, it is pushed out off one end of the barrel by the introduction into the opposite end of the barrel of afresh stopper 10 transferred from thefeeding line 5 by the actuation of engagingmeans 15. Since the introduction of afresh stopper 10 into the barrel does not necessarily suffices to push the chamferedstopper 10b completely out of the barrel, dispensingstation 4 preferably comprises means for collecting and dispensing the chamferedstopper 10b into a dispensing line. Said means may be vacuum suction of the stopper, blowing air onto the juttingstopper 10b, a suction cup or mechanical means. Vacuum or blowing means are preferred. - To optimize the chamfering operations, the
carousel 6 of the present invention comprises cylindricalhollow barrels carousel 6 comprises enough barrels distributed round its circumference to occupy all the stations 1-4 at each rotational increment. Incase loading station 1 and dispensingstation 4 correspond to a same position of the carousel, located at opposite sides thereof as illustrated inFig.1 &4, then three (or any multiple, 3xN, thereof, with N = number of sequences of stations 1-4) barrels 11, 21, 31 would allow a semi-continuous processing of the stoppers, yielding a high production rate. - The first function of the
hollow barrels spherical balls 12 mounted in, and protruding fromrecesses 13 located in the inner wall of the barrel, disposed on at least three points round its circumference to define a polygonal passageway 30 normal to the barrel's axis of revolution 19, and distributed on at least three rows along the length of the barrel. As illustrated inFig.7a&7b, theballs 12 are mounted so as to resiliently engage deeper into their correspondingrecesses 13 when pressed in, thus enlarging the passage defined thereby to accommodate saidstopper 10. - The
balls 12 are nested inrecesses 13 such that they protrude out of the inner wall of the barrel, without falling. This is achieved by providing, on the one hand, resilient means 14 resting on the bottom ofrecess 13 which pushes the ball out of the recess and, on the other hand, by ensuring thatrecess 13 opens to the inner wall in the form of a restricted neck, of diameter smaller than the ball diameter, ensuring that the balls remain in place. The person skilled in the art knows how to process such neck. For example, a washer with opening smaller than the balls diameter may be applied to the opening of a blind recess. Alternatively, a through-hole may be drilled through an inner cylinder 11 a, said through-hole opening to the inner wall thereof with a diameter smaller than the one of the ball. Said inner cylinder 11a is then inserted in anouter cylinder 11 b which constitutes the outer perimeter of the barrel thus forming the bottom ofrecesses 13 as illustrated inFig.7 . - The resilient means 14 may be a spring or an elastomeric element. Preferably, the elastomeric element has the shape of a diabolo, i.e., a prism of revolution with a restricted section in the middle. The force required to engage the ball into the recess such as to allow the passage of a stopper must be sufficiently low to permit an easy introduction of a
fresh stopper 10 into, and extraction of a fully chamferedstopper 10b out of the barrel, and sufficiently high so as to hold the stopper in place during the chamfering operations. Preferably, theballs 12 are separated from the resilient means 14 by a low friction element (e.g., in PTFE, POM, HDPE) to facilitate the translation of the stopper along the barrel by allowing a certain level of rotation of the balls. Care should be taken that the level of rotation of the balls should be sufficiently low so as to ensure that the stoppers follow the rotational movement of the barrel during a chamfering operation. - The balls are distributed along the length of the barrel over at least three rows, spread apart such that a stopper inserted in the barrel overlaps at least two rows in any position, regardless of whether or not it juts out one side of the barrel (cf.
Fig.4 ,5&7b ). In case the balls are distributed over three rows as illustrated inFig. 7b, the distance, δ, between two rows is preferably characterized such that, L/2 < δ < L, wherein L is the length of the stopper, so that the stopper contacts at any time and position within the barrel two rows of balls. - The second function of the
hollow barrels bearings 17. Any bearings suitable for this purpose can be used within the scope of the present invention. The barrels are also preferably provided with means for transmitting a rotational motion thereto from a motor. Said transmitting means may be in the form of agroove 16 suitable for engaging a transmission sling 23 (cf.Fig.7 ), or a gear suitable for engaging a transmission chain or with a complementary gear connected to said motor. - In a preferred chamfering cycle, the apparatus according to the present invention functions as follows.
- At the
loading station 1, means 15 engages a firstfresh stopper 10 at the end of thefeeding line 5 into a first cylindricalhollow barrel 11, wherein it is firmly held in a position concentric to the barrel by the combined action of theballs 12 resiliently mounted in recesses distributed in the inner wall of the barrel (cf.Fig.3 &7b).Carousel 6 is then rotated to drive thefirst barrel 11 loaded with afresh stopper 10 to afirst chamfering station 2 where it stops; upon reaching thefirst chamfering station 2,barrel 11 engages into rotational transmission means, such as a sling, a chain or a gear, and is made to rotate round its axis of revolution (cf.Fig.3 ). Simultaneously to bringing thefirst barrel 11 to thefirst chamfering station 2, the rotation of thecarousel 6 brings asecond barrel 31 to theloading station 1 where a fresh stopper is loaded into the latter as explained above (cf.Fig.3 &8). - At the
first chamfering station 2,barrel 11 faces means 25, preferably a piston, which pushes thefresh stopper 10 partly out of thebarrel 11 until it reaches stopping means 28 to expose the edge to be chamfered to arotating blade 26a (cf.Fig.1 &5). With the combined effect of the rotation ofstopper 10 driven by the rotation ofbarrel 11 and the rotation of theblade 26a, the exposed edge is chamfered over its whole circumference (cf.Fig.2 ). After a couple of revolutions of thebarrel 11, astopper 10a having one end properly chamfered at the desired angle and depth is obtained. During the time a first end of the stopper loaded inbarrel 11 is being chamfered, afresh stopper 10 is being loaded into thesecond barrel 31 at theloading station 1 and is ready to be transferred to the next station. -
Carousel 6 is then rotated again to simultaneously drive (a) thefirst barrel 11, loaded with astopper 10a having one end chamfered to asecond chamfering station 3, (b) thesecond barrel 31 loaded with afresh stopper 10 to thefirst chamfering station 2, and (c) athird barrel 21 to theloading station 1. Once each barrel faces its corresponding station, the carousel rotation stops. - The
second chamfering station 3 is a mirror reproduction of thefirst chamfering station 2 and comprises the same elements but disposed on opposite sides of the carousel. At thesecond chamfering station 3,barrel 11 faces means 35, preferably a piston, which pushes thestopper 10a partly out of thebarrel 11 until it reaches stopping means 38 to expose the un-chamfered edge still to be chamfered to arotating blade 36a (cf.Fig.1 &6). With the combined effect of the rotation ofstopper 10a driven by the rotation ofbarrel 11 and the rotation of theblade 36a, the exposed edge is chamfered over its whole circumference (cf.Fig.2 ). After a couple of revolutions of thebarrel 11, astopper 10b having both ends properly chamfered at the desired angle and depth is obtained. During the time the second end of the stopper loaded inbarrel 11 is being chamfered at thesecond chamfering station 3, afresh stopper 10 is being loaded into thethird barrel 21 at theloading station 1 and ready to be transferred to thefirst chamfering station 2, and a first end of the fresh stopper loaded insecond barrel 31 positioned at thefirst chamfering station 2 is being chamfered to yield astopper 10a having one end chamfered. - Once the respective loading and chamfering operations taking place at each corresponding station are completed,
carousel 6 resumes its rotation to drive simultaneously (a) thefirst barrel 11, loaded with astopper 10b having both ends chamfered to a dispensingstation 4, (b) thesecond barrel 31, loaded with astopper 10a having one end chamfered to thesecond chamfering station 3, and (c) thethird barrel 21 loaded with afresh stopper 10 to thefirst chamfering station 2. Preferably, the dispensingstation 4 and theloading station 1 are located at opposite sides of a same position of the carousel. In this configuration, a fourth barrel is not necessary to complete the chamfering cycle asfirst barrel 11 faces on one side thereof the dispensingstation 4 and on the other side theloading station 1. It is possible, albeit less preferred, to haveloading station 1 and dispensingstation 4 corresponding to different positions on the carousel, but then a fourth barrel is required to ensure that each station is occupied by a barrel at each stage of the chamfering cycle. - At the dispensing
station 4stopper 10b having both ends chamfered is pushed out of thebarrel 11. As explained above, this operation is preferably carried out by introducing afresh stopper 10 from thefeeding line 5, thus expulsing the chamferedstopper 10b (cf.Fig.1 &4). Alternatively, a piston may be used to simply push out the chamfered stopper, but this solution is less preferred as it requires a larger number of barrels and a larger carousel to accommodate a sequence of four stops, instead of three as illustrated inFig.1 . - To help the extraction from a barrel of a
chamfered stopper 10b, means for collecting it may be provided adjacent to a dispensing line. The collecting means could be vacuum suction or air blowing to help dislodge the stopper from the barrel. Alternatively a suction cup or any other mechanical means such as pincers may be used instead. Air blowing is probably the easiest means to implement. By blowing air at a certain angle onto the jutting extreme of the stopper, the latter is easily dislodged from the barrel and falls into a dispensing line to be carried away for further processing, - As
chamfered stopper 10b is being dislodged frombarrel 11, afresh stopper 10 is being inserted into the same barrel, whilst the second end of thestopper 10a having one chamfered end and loaded in thesecond barrel 31 is being chamfered at thesecond chamfering station 3 and a first end of thefresh stopper 10 loaded inbarrel 21 is being chamfered at thefirst chamfering stations 2 as explained supra. A chamfering cycle of a stopper loaded in abarrel 11 is thus completed and a new cycle can start with a new rotation of the carousel to bring thefresh stopper 10 loaded inbarrel 11 to afirst chamfering station 2. The latter may be the same station as for the previous cycle in case thecarousel 6 serves the barrels to a single sequence (N = 1) ofloading 1, first andsecond chamfering Fig.8 wherein the carousel serves three (N = 3) sequences 1-4 and comprises 3 x N (=3) = 9barrels Fig.8 with nine barrels and three sequences 1-4, yields with the same processing parameters an output of 3 x 60 = 180 chamfered stoppers per minute.
Claims (13)
- Apparatus for chamfering the first and second ends of cylindrical stoppers (10) comprising:(a) a feeding line 5, feeding the cylindrical stoppers 10 to a loading station 1 of a carousel 6,(b) the loading station 1 comprising means 15 for engaging the first stopper 10 at the end of the feeding line 5 into a first cylindrical hollow barrel 11 suitable for holding the stopper 10 in position;(c) means for rotating the carousel 6 so as to drive said first barrel 11 loaded with a cylindrical stopper 10 to a first chamfering station 2, while a second barrel 31 is brought to the loading station 1;(d) the first chamfering station 2 comprising:(i) means 25 for bringing into chamfering position a first end of the stopper 10 engaged in barrel 11 located in said station 2;(ii) means for rotating barrel 11 and the stopper 10 engaged therein with respect to their axis of revolution 19;(iii) a rotating blade 26 tilted at an angle corresponding to the desired chamfering angle;(e) means for rotating the carousel 6 so as to drive said barrel 11 loaded with a cylindrical stopper 10a chamfered at one end to a second chamfering station 3, while said second barrel 31 loaded with a fresh stopper 10 is brought to the first chamfering station 2;(f) the second chamfering station 3 comprising:(i) means 35 for bringing into chamfering position the second, un-chamfered end of the stopper 10a engaged in barrel 11 located in said station 3;(ii) means for rotating barrel 11 and the stopper 10a engaged therein with respect to their axis of revolution 19;(iii) a rotating blade 36 tilted at an angle corresponding to the desired chamfering angle; and(g) means for rotating the carousel 6 so as to drive said barrel 11 loaded with a cylindrical stopper 10b chamfered at both ends to a dispensing station 4, while said second barrel 31 loaded with a stopper 10a chamfered at one end is brought to the second chamfering station 3.
- Apparatus according to claim 1 wherein the means for rotating barrel (11) at the first and second chamfering stations (2) and (3) comprises a sling (23) connected to a driving wheel (24) and which the barrels (11) engage into via a groove (16) or a gear provided in their circumference, as they are brought into position at first and second chamfering stations (2) and (3).
- Apparatus according to claim 1 wherein the means for rotating the carousel (6) comprise a motor (20) comprising a transmission wheel connected to a driving belt (21) which is suitable for imparting a rotating motion to said carousel (6) around its axis of revolution via a complementary wheel (22) which is preferably located in the center of said carousel (6).
- Apparatus according to any of claims 1 to 3, wherein the means (25, 35) for bringing into chamfering position the un-chamfered end of the stoppers (10, 10a) comprises a piston (27, 37) suitable for pushing a stopper (10, 10a) through the barrel (11) in which it is engaged and a stopping means (28, 38) located on the opposite side of the barrel (11) to stop the stoppers (10, 10a) at their precise chamfering position.
- Apparatus according to any of the preceding claims, wherein the rotating blade (26, 36) is slidingly mounted on a guide (40), said guide forming a circle segment centred on the point wherein the rotating blade (26, 36) intercepts the edge of the stopper (10, 10a), such that sliding along the guide changes the chamfering angle, but not the chamfering depth.
- Apparatus according to any of the preceding claims, comprising N sequences of a loading station (1), a first chamfering station (2), and a second chamfering station (3), distributed round the carrousel (6), with corresponding number of feeding lines (5) associated with the loading stations (1), wherein N is an integer comprised between 1 and 6, preferably between 2 and 4, most preferably between 2 and 3.
- Apparatus according to claims 4 to 6, wherein the carrousel (6) is mounted on a vertical panel having first and second opposite main surfaces fluidly connected by the bore of the barrels (11), wherein the feeding line (5), the piston (27) of the first chamfering station (2) and the stop (38) of the second chamfering station (3) face the first main surface of the panel, and wherein the stop (28) of the first chamfering station (2) and the piston (37) of the second chamfering station (3), face the second main surface of the panel.
- Apparatus according to any of the preceding claims, wherein the dispensing station (4) comprises means (15) for engaging the first stopper (10) at the end of a feeding line (5) into the first cylindrical hollow barrel (11) containing a stopper (10b) chamfered at both ends, thus pushing the latter partly out of the barrel (11), and further comprises means for collecting and dispensing it into a dispensing line, said means being selected from vacuum suction means, air blowing means, suction cup, or mechanical means.
- Hollow barrel (11) for tightly holding and centring a cylindrical stopper (10) suitable for the apparatus of any of claims 1 to 7 consisting of a hollow cylinder of length and diameter larger than the stopper (10) to be engaged therein, characterized in that it comprises at least nine spherical balls (12) mounted in, and protruding from recesses (13) located in the inner wall of the barrel, disposed on at least three points round its circumference to define a polygonal passageway (30) normal to the barrel's axis of revolution (19), and distributed on at least three rows along the length of the barrel, said balls (12) being mounted so as to resiliently engage deeper into their corresponding recesses (13) when pressed in, thus enlarging the passage defined thereby to accommodate said stopper (10).
- Hollow barrel according to claim 9, further comprising transmission means to impart a rotating motion to the barrel around its axis of revolution (19) by the action of a motor, said means being a groove (16) or a gear running round the outer circumference at one end of the barrel.
- Hollow barrel according to claim 9 or 10 comprising a first inner cylinder (11a) locked in a second concentric outer cylinder (11b),(a) The first inner cylinder (11a) comprising through-holes forming the recesses (13) accommodating the at least nine spherical balls (12) and corresponding resilient means (14);(b) The second outer cylinder (11b) is mounted on bearings (17) allowing the rotation of the two concentrically interlocked cylinders round their common axis of revolution (19), and further comprises a coaxial rim (18) solidly fixed at one of its ends, said rim (18) comprising crenulations or a groove (16).
- Hollow barrel according to any of claims 9 to 11, wherein the resilient means (14) located in recesses (13) comprise a spring or a viscoelastic element, which is preferably separated from the corresponding ball (12) by a low friction element allowing the ball (12) some freedom to rotate.
- Hollow barrel according to claim 12, wherein said viscoelastic element is an elastomeric element having the shape of a diabolo.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08172201A EP2199042A1 (en) | 2008-12-18 | 2008-12-18 | Chamfering equipment for cylindrical stoppers |
PCT/EP2009/067379 WO2010070033A2 (en) | 2008-12-18 | 2009-12-17 | Chamfering equipment for cylindrical stoppers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08172201A EP2199042A1 (en) | 2008-12-18 | 2008-12-18 | Chamfering equipment for cylindrical stoppers |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2199042A1 true EP2199042A1 (en) | 2010-06-23 |
Family
ID=40583260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08172201A Withdrawn EP2199042A1 (en) | 2008-12-18 | 2008-12-18 | Chamfering equipment for cylindrical stoppers |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2199042A1 (en) |
WO (1) | WO2010070033A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114260509B (en) * | 2021-11-25 | 2023-06-02 | 东台立一工业技术有限公司 | Chamfering device for outer working surface of workpiece for sliding bearing production and processing |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000023259A1 (en) * | 1998-10-21 | 2000-04-27 | Nomacorc, L.L.C. | Synthetic closure and manufacturing process therefor |
US6221450B1 (en) | 1997-09-17 | 2001-04-24 | Nomacorc, Llc | Synthetic closure |
WO2003004367A1 (en) * | 2001-07-04 | 2003-01-16 | Procork Pty Ltd | Container stopper |
US20030161985A1 (en) | 1997-04-24 | 2003-08-28 | Eduardo Lauer | Synthetic closure |
WO2004020299A1 (en) * | 2002-08-29 | 2004-03-11 | Nukorc Pty Ltd | Synthetic cork with tapered edge by heat shrinking and method thereof |
EP1493681A1 (en) | 2003-07-04 | 2005-01-05 | Volpini de Maestri, Anton | Method and apparatus for manufacturing synthetic bottle stoppers |
US20060035074A1 (en) | 2002-03-06 | 2006-02-16 | Taylor David G | Stoppers |
-
2008
- 2008-12-18 EP EP08172201A patent/EP2199042A1/en not_active Withdrawn
-
2009
- 2009-12-17 WO PCT/EP2009/067379 patent/WO2010070033A2/en active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030161985A1 (en) | 1997-04-24 | 2003-08-28 | Eduardo Lauer | Synthetic closure |
US6221450B1 (en) | 1997-09-17 | 2001-04-24 | Nomacorc, Llc | Synthetic closure |
WO2000023259A1 (en) * | 1998-10-21 | 2000-04-27 | Nomacorc, L.L.C. | Synthetic closure and manufacturing process therefor |
WO2003004367A1 (en) * | 2001-07-04 | 2003-01-16 | Procork Pty Ltd | Container stopper |
US20060035074A1 (en) | 2002-03-06 | 2006-02-16 | Taylor David G | Stoppers |
WO2004020299A1 (en) * | 2002-08-29 | 2004-03-11 | Nukorc Pty Ltd | Synthetic cork with tapered edge by heat shrinking and method thereof |
US20060222800A1 (en) | 2002-08-29 | 2006-10-05 | Nukorc Pty Ltd | Synthetic Cork with Tapered Edge by Heat Shrinking and Method Thereof |
EP1493681A1 (en) | 2003-07-04 | 2005-01-05 | Volpini de Maestri, Anton | Method and apparatus for manufacturing synthetic bottle stoppers |
Also Published As
Publication number | Publication date |
---|---|
WO2010070033A2 (en) | 2010-06-24 |
WO2010070033A3 (en) | 2010-09-16 |
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