CN1890153A - Heat tunnel for film shrinking - Google Patents
Heat tunnel for film shrinking Download PDFInfo
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- CN1890153A CN1890153A CNA2004800364125A CN200480036412A CN1890153A CN 1890153 A CN1890153 A CN 1890153A CN A2004800364125 A CNA2004800364125 A CN A2004800364125A CN 200480036412 A CN200480036412 A CN 200480036412A CN 1890153 A CN1890153 A CN 1890153A
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- Prior art keywords
- hot air
- heat tunnel
- equipment
- pressure stabilizing
- stabilizing chamber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
- B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
- B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
- B65B53/063—Tunnels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
Abstract
A heat tunnel for applying heated air to articles enclosed in shrink-wrap film. The heat tunnel includes at least one air supply unit, the air supply unit further having a source of heated air, a fan, a heated air plenum, air ducts, and a return air plenum; a conveyor chain; and a heat shroud spaced from the conveyor chain. Multiple air supply units can be provided along the conveyor to create a heat tunnel of desired length.
Description
Technical field
The application be submitted on May 23rd, 2003, part continuation application that application number co-pending is 60/473,372 U.S. Patent application.
The present invention relates to a kind of equipment that uses the shrink wrap connection with wrapping of piece, especially relate to and a kind ofly can be used for various membrane structures (configuration), improved heat tunnel.
Background technology
An available width of cloth heat shrink films connection with wrapping of piece known in this field, form the packing that attaches together packet mode in the following manner: shrink by making the film pipe adjacent with weakening area, make the film pipe that wraps up around article group at interval separate, and then make the film pipeline section that forms thus shrink the formation packing around article along this weakening area.Specifically see also U.S. patent 3,545,165.Such as above-mentioned current packaging method comprise with article group continuously (in series) send in the heat tunnel (heat tunnel), and the trailing edge of film from the leading edge of article group to article group wraps up this article.Fig. 1 shows how to finish this operation under normal conditions.The article group G compartment of terrain that a plurality of article A form is placed on the belt conveyor C.The rete L that film F forms (usually from a volume film) is with the mode wrap articles group G of continuous covering adjacent article group G.
Article group G is admitted on belt conveyor in the heat tunnel T then.As shown in the figure, the joint portion J between the adjacent article group is heated also (typically) force to blow, make the rete L at J place, joint portion softening and disconnect between each article group, the while tightens up to article group G.Finish the package P of article A like this, and film shrinks around package P.The end E (being known as " porthole ") that closes up of package is positioned at described package along the direction of belt travel end of (as shown by arrows).
The expansion of the said equipment as shown in Figure 2.At this, parallel belt conveyor C1, C2, C3 etc. send into article group G1, G2, G3 etc. in the heat tunnel that produces above-mentioned thermal contraction.This parallel the setting improved total make.
Equipment as depicted in figs. 1 and 2 has a lot of shortcomings.In the process that a plurality of article A is pooled article group G (being known as " pack pattern (pack patterns) "), continuous film pipe has caused design challenges as described below, promptly how to support these article group from downside in product shape film forming pipe.This problem can be more complicated when needs change product size.In theory, the every change of product size once, the belt conveyor C that then pack pattern of product is delivered to heat tunnel its width of all will having to change is to adapt to the film pipe around pack pattern.
And in another modification (applicant once used in the past), do not use continuous rete around article group, and be to use the Membrane cover (sleeve) that cuts, each article group is used a Membrane cover.But, article group G sends among the heat tunnel T as follows continuously: wherein the article among each article group G are orientated in the following manner, and promptly film is shrunk to around each article group and makes it close up the direct of travel of the orientation of end E (" porthole ") perpendicular to belt conveyor.In order to improve output, a plurality of parallel article flows can be sent in the heat tunnel.
The 60/473rd, No. 372 U.S. Patent Application Publications the equipment and the method for the shrink wrap tube packaging article that punch in advance of a kind of employing, wherein, the shrink wrap pipe of punching wraps up the article on the belt conveyor and delivers in the heat tunnel in advance, and the orientation of the open end of film pipe is basically perpendicular to the direction of transfer of belt conveyor.
The application discloses a kind of improved heat tunnel in first to file, shrink wrap that this heat tunnel can be used for punching in advance and the shrink wrap that does not punch in advance.
No matter be to the package produced or to the equipment of Production and Packaging part, the more and more important problem that become in the packaging industry attractive in appearance.When film shrinks in the end of package, should only stay circular opening on the package, i.e. " porthole ", and should not produce fold.All should meet this situation for each package and for the different package of product size.
With regard to the mode of operation of existing heat tunnel, produce " porthole " attractive in appearance and have many difficult problems.Existing heat tunnel produces the porthole of modification owing to the effect of not controlled air-flow through regular meeting.That is, when the article group in being wrapped in shrink wrap entered into heat tunnel, described film can suffer from various air-flows at random, caused film shake when shrinking.This not controlled air-flow causes film wrinkling and shrink inhomogeneously, and then produces inaesthetic porthole.And existing heat tunnel generally can not be regulated according to different product sizes.
Therefore, need a kind of so later-model heat tunnel, thereby this heat tunnel can contraction is controlled to obtain porthole attractive in appearance consistently by making, and this heat tunnel can be regulated according to the product size that changes within the specific limits.
Also need a kind of so later-model heat tunnel, this heat tunnel can reduce the transmission of heat to the heat tunnel outer wall, increase work efficiency, and by reducing the working environment of temperature and improving equipment.
And, also needing a kind of like this heat tunnel, the outward appearance of this heat tunnel is more beautiful, size is littler.
The present invention is intended to satisfy above-mentioned all demands.
Summary of the invention
A kind of heat tunnel that is used for providing hot air to article by the shrink wrap parcel, this heat tunnel comprises:
(a) at least one gas feeder, this gas feeder comprises: heated air source, fan, hot air pressure stabilizing chamber, air flue and return-air pressure stabilizing chamber;
(b) transmit chain belt; And
(c) hot guard shield, itself and described conveyer chain interband separate.
Can a plurality of gas feeders be set along belt conveyor, to obtain the heat tunnel of predetermined length.
A main purpose of the present invention and advantage are: the invention provides by belt conveyor, the pulsation-free laminar flow, and from the controlled airflow of both sides.The package of the shrink film covering that produces like this has uniform side of a ship window shape, has minimum distortion and minimum fold.
Another main purpose of the present invention and advantage are: the invention enables hot guard shield vertically to regulate, can access consistent packing effect when guaranteeing that product size is in certain scope.
Another main purpose of the present invention is with advantage: passes the hot air of belt conveyor net and the film of product below and contacts, thereby " the gas welding " of the lapped seam of generation film.
Another main purpose of the present invention is with advantage: the minimum that contacts of hot air and product transmission chain belt net, like this, transmit the relative low temperature that chain belt can remain on about 220 .Therefore, film can not stick in and transmit on the chain belt, and seldom has heat to be lost to the external world.
Another main purpose of the present invention and advantage are: the outside face of heat tunnel keeps lower temperature in the course of the work, makes machine safer like this, and working environment is more comfortable, and has improved work efficiency owing to egress of heat reduces.
Another main purpose of the present invention and advantage are: the present invention has hot guard shield and a lower profile of an arch, thereby has improved outward appearance.
Another main purpose of the present invention and advantage are: belt conveyor can be regulated, and with the situation of the film pipe that is used for cutting side by side article, perhaps is used for by the situation of the shrink wrap wrap articles of punching in advance.
Another main purpose of the present invention and advantage are: the present invention both can adopt the belt conveyor of the single chain belt that occupies the whole width of machine also can adopt to have central airway, move side by side many transmit chain belts.
Another main purpose of the present invention and advantage are: the structure of belt conveyor can make the air from the hot air pressure stabilizing chamber freely pass this belt conveyor and arrive product.
Another main purpose of the present invention and advantage are: the temperature that transmits chain belt can be controlled by cooling fan, and this cooling fan can make air in the whole width cocycle that transmits chain belt.
Another main purpose of the present invention is with advantage: compare noise of the present invention with existing pattern and reduced by 13%.
Another main purpose of the present invention and advantage are: the temperature booster that is adopted surpasses 20000 working hours through the specified service life that original equipment manufacturer (OEM) is made.
Another main purpose of the present invention and advantage are: the invention provides the compound type gas feeder, this gas feeder comprises heated air source, fan, hot air pressure stabilizing chamber, air flue and return-air pressure stabilizing chamber.Thus, a plurality of compound type gas feeders can be connected and are arranged on the belt conveyor, and this belt conveyor and hot guard shield form the heat tunnel that length can change together.Like this, the length of heat tunnel can be regulated with respect to the speed that article are sent into, and thinks that article reach the shrinkage temperature of shrink wrap and the heat shrinkable package film provides abundance around the article contraction time.
Description of drawings
Fig. 1 is the notion block diagram of packaging facilities of the prior art;
Fig. 2 shows another embodiment of equipment of the prior art shown in Figure 1;
Fig. 3 is the notion block diagram of equipment of the present invention;
Fig. 4 is the front perspective view of equipment of the present invention;
Fig. 5 is the exploded perspective view of equipment of the present invention;
Fig. 6 is the lateral plan of equipment of the present invention;
Fig. 7 is the block diagram of gas feeder of the present invention;
Fig. 8 is the exploded perspective view of gas feeder of the present invention;
Fig. 9 is the birds-eye view of transmission chain belt of the prior art and hot air pressure stabilizing chamber;
Figure 10 is the birds-eye view of transmission chain belt of the present invention and hot air pressure stabilizing chamber;
Figure 11 A is the front view of equipment of the present invention;
It among Figure 11 B the detail drawing in indication zone among Figure 11 A;
Figure 12 is the lateral plan of gas feeder of the present invention;
Figure 13 A is the block diagram of second embodiment of equipment of the present invention, wherein has transmission chain belt side by side;
Figure 13 B is the front view of the equipment among Figure 13 A;
Figure 13 C is the detail drawing in indication zone among Figure 13 B;
Figure 14 is the block diagram that adopts the heat tunnel of embodiment among Figure 13 A;
Figure 15 and Figure 14 are similar, only show the article that have been retracted packing in heat tunnel in addition;
Figure 16 is the block diagram of hot air pressure stabilizing chamber of the present invention, shows the example that has nozzle around hole;
Figure 17-Figure 20 is a block diagram of the present invention, shows the situation of using selectable membrane separator;
Figure 21 is the block diagram with hot air pressure stabilizing chamber of air flue, and it shows another embodiment of the present invention;
Figure 22 is the block diagram of the embodiment among Figure 21;
Figure 23 is near the cutaway view of cutting open the line 23 in Figure 21.
The specific embodiment
A scheme of the present invention is to be used for the heat supply to article A, with the equipment 10 by shrink wrap F connection with wrapping of piece A.
Equipment 10 (Fig. 4, Fig. 5 and Fig. 6) comprises belt conveyor 12, and this belt conveyor 12 has first hole 14 of a plurality of perforations.This belt conveyor 12 is driven along the first direction shown in the arrow among Fig. 5 by electrical motor 16.
In one embodiment, hot air pressure stabilizing chamber 20 comprises bottom surface 25, and this bottom surface 25 is relative and spaced apart with end face 22 with end face 22, thereby has formed pipeline 36 between bottom surface and end face.The height 38 of pipeline 36 reduces gradually along first direction, and this point is high-visible in Fig. 6 and Figure 12.
(Figure 10) in one embodiment, when belt conveyor 12 when first direction moves, first hole 14 and second hole 24 are aimed at substantially.This structure is different from first hole 14 and the staggered substantially structure of second hole 24 of prior art (Fig. 9) fully.Because first hole 14 and second hole 24 are aimed at substantially, the hot air heating that belt conveyor just can be passed hole when first hole and second hole interlock only, so the temperature of this belt conveyor is lower, its vital function will be set forth in the back.
In one embodiment, equipment 10 also comprises belt conveyor cooling fan 40, this fan help to keep the temperature of the temperature of belt conveyor well below existing installation.
In one embodiment, equipment 10 comprises that also side air flue 50 is used to send the hot air from hot air pressure stabilizing chamber 20 along the side air flue 50 of this belt conveyor 12 first direction, close.Side air flue 50 can optionally have supplemental heat source 52 (Figure 11 B), and this thermal source can be an electric heater.
(Figure 13 A-Figure 13 C, Figure 14, Figure 15) in one embodiment, equipment 10 comprise at least two transmission chain belt 12a, 12b side by side, that move along first direction.
(Figure 13 A-Figure 13 C, Figure 14, Figure 15) in one embodiment, equipment 10 also comprises central airway 54, it is used to send the hot air from hot air pressure stabilizing chamber 20.Central airway 54 can optionally have supplemental heat source 56, and this thermal source can be an electric heater.
(Fig. 5) in one embodiment, the distance 60 of being separated by between guard shield 32 and the belt conveyor 12 can change, with the article of ccontaining different size.In this case, equipment 10 also comprises the device 62 that is used to change distance 60.Device 62 can be that manually operated (for example, crank or screw rod) also can be automatic (for example, by electrical motor 62a)
Another scheme of the present invention is to be used for providing hot air to article A, with the heat tunnel 110 by shrink wrap F connection with wrapping of piece A.
Equipment 110 (Fig. 4, Fig. 5, Fig. 6 and Figure 10) comprises mobile transmission chain belt 112, and this transmission chain belt has first hole 14 of a plurality of perforations that separated by link bar 15.
Equipment 110 also comprises heated air source 18.Equipment 110 comprises that also (Fig. 7) is positioned at the hot air pressure stabilizing chamber 20 that transmits chain belt 112 belows and support transmission chain belt 112, and this hot air pressure stabilizing chamber 20 has end face 22, and this end face has second hole 24 of a plurality of perforations.The applicant finds that the optimum dimension of second hole 24 is about 7/16 " to 7/32 ".In this scope, the situation the when turbulence of the hot blast by second hole 24 is far smaller than second pore-size and is greater than or less than this scope.Particularly, second pore-size in this range of sizes mainly produces vertical air-flow, and can produce the air-flow of level greater than the hole of this range of sizes.
(Figure 10) in one embodiment, when transmitting chain belt 112 when first direction moves, first hole 14 and second hole 24 are aimed at substantially.This structure is different from first hole 14 and the staggered substantially structure of second hole 24 of prior art (Fig. 9) fully.Because first hole 14 and second hole 24 are aimed at substantially, the hot air heating that belt conveyor just can be passed hole when first hole and second hole interlock only, so the temperature of this belt conveyor is lower, its vital function will be set forth in the back.
In one embodiment, equipment 110 also comprises side air flue 50, and this side air flue 50 is used to send the hot air of self-heating air plenum 20, hot air is crossed transmit chain belt 112.Side air flue 50 can optionally have supplemental heat source 52 (Figure 11 B), and this thermal source can be an electric heater.
Equipment 110 also comprises return-air pressure stabilizing chamber 30, is used for sending air back to heated air source 18.
Equipment 110 also comprises guard shield 32, and this guard shield partly surrounds and transmits chain belt 112, and spaced apart with transmission chain belt 112, and it and transmission chain belt 112 form film constriction zone 34 together between transmission chain belt 112 and guard shield 32.
In one embodiment, this hot air pressure stabilizing chamber 20 is along the direction of described transmission chain belt 112, convergent on the direction vertical with described transmission chain belt 112, and this point is high-visible in Fig. 6 and Figure 12.
(Figure 13 A-Figure 13 C) in one embodiment, equipment 110 also comprise at least one additional chain belt 12B that transmits.
(Figure 13 A-Figure 13 C, Figure 14 and Figure 15) in one embodiment, equipment 110 also comprise between the central airway 54 that transmits between chain belt 12a, the 12b, are used to send the hot air from hot air pressure stabilizing chamber 20, make hot air cross these and transmit chain belt.Central airway 54 can optionally have supplemental heat source 56, and this thermal source can be an electric heater.
(Fig. 5) in one embodiment, guard shield 32 and the distance (at interval) 60 that transmits between the chain belt 112 can change, with the article of ccontaining different size.In this case, heat tunnel 110 also comprises electrical motor 62a, is used for respect to transmitting this guard shield 32 of chain belt 112 liftings.
Another scheme of the present invention is the heat tunnel 210 that is used for providing to the article by the shrink wrap packing hot air.This heat tunnel comprises: at least one gas feeder 220; Transmit chain belt 112; And and transmit chain belt 112 isolated hot guard shields 32, wherein, can a plurality of gas feeders 220 be set along transmitting chain belt 112, to obtain the heat tunnel of predetermined length.Gas feeder 220 comprises heated air source 18, fan 26, hot air pressure stabilizing chamber 20, air flue 50 and return-air pressure stabilizing chamber 30.
In one embodiment, this hot air pressure stabilizing chamber 20 is along the moving direction of described transmission chain belt 112, convergent on the direction vertical with described transmission chain belt 112, and this point is high-visible in Fig. 6 and Figure 12.
(Figure 13 A-Figure 13 C) in one embodiment, equipment 210 also comprise at least one additional chain belt 12b that transmits.
(Figure 13 A-Figure 13 C, Figure 14 and Figure 15) in one embodiment, equipment 210 also comprise between the central airway 54 that transmits between chain belt 12a, the 12b, are used to send the hot air from hot air pressure stabilizing chamber 20, make hot air cross the transmission chain belt.Central airway 54 can optionally have supplemental heat source 56, and this thermal source can be an electric heater.
(Fig. 5) in one embodiment, guard shield 32 and the distance (at interval) 60 that transmits between the chain belt 112 can change, with the article of ccontaining different size.In this case, equipment 210 also comprises electrical motor 62a, is used for respect to transmitting chain belt 112 lifting guard shields 32.Device 62 can be that manually operated (for example, crank or screw rod) also can be automatic (for example, by electrical motor 62a).
Heat tunnel 210 (Fig. 4, Fig. 5, Fig. 6 and Figure 10) comprises mobile transmission chain belt 112, and this chain belt has first hole 14 of a plurality of perforations that separated by link bar 15.Hot air pressure stabilizing chamber 20 has end face 22, and this end face has second hole 24 of a plurality of perforations.The applicant finds that the optimum dimension of second hole 24 is about 7/16 " to 7/32 ".In this range of sizes, the situation the when turbulence of the hot blast by second hole 24 is far smaller than second pore-size and is greater than or less than this range of sizes.Particularly, second pore-size in this range of sizes mainly produces vertical air-flow, and can produce the air-flow of level greater than the hole of this range of sizes.
(Figure 10) in one embodiment, when transmitting chain belt 112 when first direction moves, first hole 14 and second hole 24 are aimed at substantially.This structure is different from first hole 14 and the staggered substantially structure of second hole 24 of prior art (Fig. 9) fully.Because first hole 14 and second hole 24 are aimed at substantially, the hot air heating that belt conveyor just can be passed hole when two cover holes interlock only, so the temperature of this belt conveyor is lower, its vital function will be set forth in the back.
In one embodiment, heated air source 18 can be dismantled from gas feeder.
In one embodiment, heated air source 18 is controlled so that the hot air pressure stabilizing chamber keeps stationary temperature.
In one embodiment, equipment 210 also comprises the sensor 230 (Fig. 6) that is arranged in hot air pressure stabilizing chamber 20, fan 26 rears.Sensor 230 is in order to the temperature of control heated air source 18.
In one embodiment, the speed of fan 26 is variable, passes the hot blast of hot air pressure stabilizing chamber 20 with adjustment.
In one embodiment, fan 26 can be dismantled from gas feeder 220.
In one embodiment, heat tunnel 210 also comprises side air flue 50, is used to send the hot air from hot air pressure stabilizing chamber 20, hot air is crossed transmit chain belt 112.Side air flue 50 can optionally have supplemental heat source 52 (Figure 11 B), and this thermal source can be an electric heater.
In one embodiment, side air flue 50 has adjustable opening.
In one embodiment, the side air flue has diffuser 51.
Another scheme of the present invention is the compound type gas feeder 220 that is used for providing to the article by the shrink wrap packing heat tunnel of hot air.This gas feeder 220 comprises heated air source 18, fan 26, hot air pressure stabilizing chamber 20, air flue 50 and return-air pressure stabilizing chamber 30.Fan 26 blows hot air from heated air source 18 to hot air pressure stabilizing chamber 20.
In one embodiment, can connect is provided with a plurality of compound type gas feeders 220, thereby changes the length of heat tunnel, and this point is high-visible in Fig. 4, Fig. 5 and Fig. 6.
In one embodiment, hot air pumping chamber 20 and hot air moving direction traversed by cross section convergent, and the sectional area of hot air pressure stabilizing chamber is along with reducing gradually away from fan 26.This point is high-visible in Fig. 6 and Figure 12.
In one embodiment, compound type gas feeder 220 also comprises telescopic central airway 54, is used to receive the hot air from the hot air pressure stabilizing chamber.
In one embodiment, be provided with the supplemental heat source 56 that is used for central airway.
Working process of the present invention is described below with reference to accompanying drawings.
As shown in Figure 3, infeed conveyors (infeed conveyor) (not shown) receives and waits to shrink the article A of packing, and shrink wrap is wrapped in around these article.Although shown in Fig. 3 is to have adopted shrink wrap 21 wrap articles of punching in advance, in fact be applicable to the shrink wrap wrap articles that adopts any kind.
Subsequently article are transported to belt conveyor 12,112 as shown in Figure 3 and enter the heat tunnel shown in the Reference numeral 10 Fig. 3 from infeed conveyors.
In each scheme of the present invention, article all move in equipment 10,110 along belt conveyor 12,112.In this process, the hot air that fan 26 drives from heated air source 18 to hot air pressure stabilizing chamber 20.Then, hot air flows out hot air pressure stabilizing chamber 20 by second hole 24.In the process that belt conveyor 12,112 moves along hot air pressure stabilizing chamber 20, first hole 14 is aimed at substantially with second hole 24, makes the shrink wrap of hot air direct contact article belows to carry out gas welding (air weld) like this.Because hot air can not touch the other parts except link bar 15 (as shown in figure 10) that transmit chain belt 112, therefore transmission chain belt 112 of the present invention is compared with existing installation and can be kept relative low temperature.Can prevent that like this shrink wrap is bonded on the transmission chain belt 112.Lower transmission chain belt temperature also makes the film lapped seam of article belows be subjected to the effect of hot air and welding, and can be owing to the effect that is subjected to the passage of heat chain belt produces bad transmission chain belt welding (chain weld).In addition, owing to also prevented the airborne heat of the chargeable heat of transmission chain belt own, therefore make hot air can carry out more effective gas welding to shrink wrap.Another advantage is to make the transmission chain belt to have longer service life.The cooling fan that can also be provided for transmitting chain belt 112 is strengthened these advantages.
Along with hot air moves away fan 26, passes hot air pressure stabilizing chamber 20, outwards scatter and disappear volume of air amount each second hole 24 from the end face 22 of hot air pressure stabilizing chamber 20.For keeping air pressure constant, before arriving next group hole 24, the volume of pressure stabilizing chamber 20 need correspondingly dwindle.The present invention dwindles the cross-sectional area away from fan 26 places of pressure stabilizing chamber 20, to adjust the volume of pressure stabilizing chamber 20, makes pressure keep constant relatively with the length direction along pressure stabilizing chamber.
When hot air moves through second hole 24 and first hole 14, aim at and make that turbulent flow significantly reduces in the hot air because second hole 24 has specific dimensions and itself and first hole 14, therefore produce vertical substantially laminar flow.The shake of heat shrinkable package film reduces like this, and then produces porthole more attractive in appearance.
By the shrink wrap wrap articles so that the open end of shrink wrap is oriented under the situation with belt conveyor 12,112 traversed bies, this side air flue 50 provides hot air to these openings.
Under the situation that belt conveyor is divided into two transmission chain belt 12a, 12b side by side, the central airway 54 of retractable optionally is set, provide hot air with open end towards transmitting chain belt 112 central authorities to shrink wrap.
Interval between hot guard shield 32 and the belt conveyor 12 can vertically be regulated, with article and these article of shrink wrapping most effectively of ccontaining different size.This adjusting can be by lifting mechanism 62 manually or utilize electrical motor 62A automatically to realize.
Be provided with to obtain the heat tunnel of all lengths by compound type gas feeder 220 series connection that will include heated air source 18, fan 26, hot air pressure stabilizing chamber 20, air flue 50 and return-air pressure stabilizing chamber, belt conveyor 12 and guard shield 32 are arranged on gas feeder 220 tops.Because the length of heat tunnel can change, and can the film contraction process be adjusted to the best according to the speed that article are sent into.
Further improve and comprise that to make heated air source 18 controlled so that the temperature in the hot air pressure stabilizing chamber 20 keeps constant ability, this can realize that this sensor is used to control the temperature of heated air source 18 by sensor 230 (Fig. 6) is set in hot air pressure stabilizing chamber 20.The speed of fan 26 can change, to regulate the hot blast by hot air pressure stabilizing chamber 20.
The present invention also comprises the improvement of a lot of practicalities.As when keeping in repair and/or change, heated air source 18 and fan 26 can be dismantled from gas feeder 220.And whole gas feeder 220 also can be from the heat tunnel dismounting to change.
In yet another embodiment, this second hole 24 can have little nozzle 24A (Figure 16).Nozzle 24A has increased the length of hole 24 and has reduced from hole 24 the horizontal gas flow that flows out, and this makes that the air-flow that flows out hole 24 is more vertical, thereby to the interference of shrink wrap still less.
In yet another embodiment, as Figure 17-shown in Figure 20, can optionally increase membrane separator 250 at the supply side of heat tunnel.Membrane separator 250 guarantees that the film between the adjacent packing can not be sticked together in fusion.Membrane separator 250 extends to long enough in the heat tunnel, to shrink and separate with the bottom that extends to the film that is not supported outside the article of adjacent packages in the bottom of guaranteeing to extend to the film that is not supported outside the article.Disconnector 250 can be installed in the top of transmitting chain belt 112, and (Figure 17-Figure 18) perhaps, also can be installed in one group and transmit between chain belt 12a, the 12b (Figure 19-Figure 20).
(Figure 21-Figure 23), can add airflow control mechanism 260 on hot air pressure stabilizing chamber 20 is to change the quantity of hot air of sending by second hole 24 on pressure stabilizing chamber 20 width In yet another embodiment.Have been found that under the situation of using making hole film for the bottom of package, the required airshed of film of separating punching place is too much, may cause the film excess shrinkage like this and make producing hole on the film.Airflow control mechanism 260 preferably includes the air flue (air lane) 262 that is arranged in belt conveyor 12 belows, hot air pressure stabilizing chamber 20.These air flues 262 will provide hot air to delegation on the width of pressure stabilizing chamber 20 or multirow second hole 24.In addition, the air demand of each air flue 262 can be regulated respectively by using one or more baffle plates 264.Under normal conditions, be positioned at the below of film of weakening and the air flue 262a of outer wrapper both sides and open, separate package and film is shunk so that maximum energy passes belt conveyor 12.Yet restriction is positioned at the unlatching of the air flue 262b under the package so that the lapped seam of package bottom can fuse, and film can be owing to overheated not impaired like this.Should be understood that described accompanying drawing only shows an example that uses air flue, other baffle arrangement is also contained in the scope of the present invention.
Under the prerequisite that does not break away from spirit of the present invention and inner characteristic, the present invention can implement in other concrete mode, therefore, these embodiment are illustrative and not restrictive in all its bearings at present, scope of the present invention is definite by appending claims, and is not to be determined by aforesaid specification sheets.
Claims (52)
1. be used for the equipment to the article heat supply of being wrapped up by shrink wrap, this equipment comprises:
(a) belt conveyor, it has first hole of a plurality of perforations;
(b) wherein, this belt conveyor moves along first direction;
(c) heated air source;
(d) hot air pressure stabilizing chamber, it is positioned at this belt conveyor below and supports this belt conveyor, and the end face of this hot air pressure stabilizing chamber has second hole of a plurality of perforations;
(e) fan, the hot air that it blows from this heated air source makes hot air pass this hot air pressure stabilizing chamber, described second hole and described first hole;
(f) return-air pressure stabilizing chamber, it sends air back to this heated air source; And
(g) guard shield, it partly surrounds this belt conveyor along this first direction, the distance that this guard shield and this belt conveyor are certain at interval, and between this belt conveyor and this guard shield, form the film constriction zone thus.
2. equipment as claimed in claim 1, it is characterized in that this hot air pressure stabilizing chamber also comprises the bottom surface, this bottom surface is spaced apart with this end face and this bottom surface is relative with this end face, thereby form pipeline between this bottom surface and this end face, the height of this pipeline reduces gradually along this first direction.
3. equipment as claimed in claim 1 is characterized in that, when this belt conveyor when this first direction moves, described first hole and described second hole are aimed at substantially.
4. equipment as claimed in claim 1 is characterized in that this equipment also comprises the belt conveyor cooling fan.
5. equipment as claimed in claim 1 is characterized in that, this equipment comprises that also this side air flue sends the hot air from this hot air pressure stabilizing chamber along the side air flue of this belt conveyor this first direction, close.
6. equipment as claimed in claim 5 is characterized in that this equipment also comprises the supplemental heat source that is used for this side air flue.
7. equipment as claimed in claim 1 is characterized in that, this belt conveyor also comprises at least two transmission chain belts side by side that move along this first direction.
8. equipment as claimed in claim 7 is characterized in that this equipment also comprises central airway, and they are between described two transmission chain belts, and this central airway sends the hot air from this hot air pressure stabilizing chamber.
9. equipment as claimed in claim 8 is characterized in that this equipment also comprises the supplemental heat source that is used for this central airway.
10. equipment as claimed in claim 1 is characterized in that this distance is changeable, with the article of ccontaining different size.
11. equipment as claimed in claim 10 is characterized in that, this equipment also comprises the device that is used to change this distance.
12. equipment as claimed in claim 11 is characterized in that, the described device that is used to change this distance is a manually operated.
13. equipment as claimed in claim 11 is characterized in that, the described device that is used to change this distance is automatic.
14. equipment as claimed in claim 1 is characterized in that, the size of described second hole is between 7/16 " to 7/32 ", to produce the vertical substantially laminar flow by described second hole.
15. equipment as claimed in claim 8 is characterized in that, the air-flow that flows out from this central airway is adjustable.
16. equipment as claimed in claim 8 is characterized in that, the air-flow that flows out from this central airway is spread.
17. equipment as claimed in claim 1 is characterized in that, described second hole also comprises nozzle.
18. equipment as claimed in claim 1 is characterized in that, this equipment also comprises the membrane separator that is positioned on this belt conveyor.
19. equipment as claimed in claim 7 is characterized in that, this equipment also comprises the membrane separator between described transmission chain belt.
20. equipment as claimed in claim 1 is characterized in that, this equipment also comprises airflow control mechanism, and the quantity of hot air of described second hole is passed in its control.
21. equipment as claimed in claim 20 is characterized in that, this airflow control mechanism comprises the one or more air flues that are arranged in this hot air pressure stabilizing chamber.
22. equipment as claimed in claim 21 is characterized in that, this equipment also comprises one or more baffle plates, and described baffle plate optionally barrier air passes one or more air flues.
23. a heat tunnel that is used for providing to the article by the shrink wrap parcel hot air, this heat tunnel comprises:
(a) movably transmit chain belt, it comprises first hole that is separated by link bar;
(b) hot air pressure stabilizing chamber, it is positioned at described transmission chain belt below and supports described transmission chain belt, and the end face of this hot air pressure stabilizing chamber has second hole of a plurality of perforations;
(c) heated air source;
(d) side air flue, it receives hot air and guides described hot air to cross described transmission chain belt;
(e) return-air pressure stabilizing chamber; And
(f) guard shield, it partly surrounds this transmission chain belt, and this guard shield and this transmit the chain belt space, and transmit formation film constriction zone between chain belt and this guard shield at this thus.
24. heat tunnel as claimed in claim 23 is characterized in that, this hot air pressure stabilizing chamber is along the direction of described transmission chain belt, convergent on the direction vertical with described transmission chain belt.
25. heat tunnel as claimed in claim 23 is characterized in that, this heat tunnel also comprises at least one additional chain belt that transmits.
26. heat tunnel as claimed in claim 25 is characterized in that, this heat tunnel also comprises central airway, and it is between described transmission chain belt, and the guiding hot air crosses described transmission chain belt.
27. heat tunnel as claimed in claim 26 is characterized in that, this heat tunnel also comprises the supplemental heat source that is used for this central airway.
28. heat tunnel as claimed in claim 23 is characterized in that, between this guard shield and the described transmission chain belt is variable at interval, with the article of ccontaining different size.
29. heat tunnel as claimed in claim 28 is characterized in that, this heat tunnel also comprises electrical motor, and it makes this guard shield with respect to the lifting of described transmission chain belt.
30. heat tunnel as claimed in claim 23 is characterized in that, described second hole and described first hole be linear alignment substantially.
31. a heat tunnel that is used for providing to the article by the shrink wrap parcel hot air, this heat tunnel comprises:
(a) at least one gas feeder, this gas feeder further comprises: heated air source, fan, hot air pressure stabilizing chamber, air flue and return-air pressure stabilizing chamber;
(b) transmit chain belt; And
(c) hot guard shield, itself and this conveyer chain interband separates,
Wherein, can transmit chain belt along this a plurality of gas feeders are set, to obtain the heat tunnel of predetermined length.
32. heat tunnel as claimed in claim 31 is characterized in that, this hot air pressure stabilizing chamber is along the direction of described transmission chain belt, convergent on the direction vertical with described transmission chain belt.
33. heat tunnel as claimed in claim 31 is characterized in that, this heat tunnel also comprises at least one additional chain belt that transmits.
34. heat tunnel as claimed in claim 33 is characterized in that, this heat tunnel also comprises central airway, and it is arranged between the described transmission chain belt, and the guiding hot air crosses described transmission chain belt.
35. heat tunnel as claimed in claim 34 is characterized in that, this heat tunnel also comprises the supplemental heat source that is used for this central airway.
36. heat tunnel as claimed in claim 31 is characterized in that, between this guard shield and the described transmission chain belt is changeable at interval, with the article of ccontaining different size.
37. heat tunnel as claimed in claim 36 is characterized in that, this heat tunnel also comprises electrical motor, and it makes this guard shield with respect to the lifting of described transmission chain belt.
38. heat tunnel as claimed in claim 31, it is characterized in that described transmission chain belt also comprises a plurality of first holes that separated by cable stud, wherein, the end face of this hot air pressure stabilizing chamber has a plurality of second holes, and described first hole and described second hole linear alignment substantially.
39. heat tunnel as claimed in claim 31 is characterized in that, this heated air source can be dismantled from gas feeder.
40. heat tunnel as claimed in claim 31 is characterized in that, this heated air source is controlled, so that the maintenance of the temperature in this hot air pressure stabilizing chamber is constant.
41. heat tunnel as claimed in claim 31 is characterized in that, this heat tunnel also comprises sensor, and it is arranged in this hot air pressure stabilizing chamber, and this sensor is controlled the temperature of this heated air source.
42. heat tunnel as claimed in claim 31 is characterized in that, the adjustable-speed of this fan is to regulate the hot blast by this hot air pressure stabilizing chamber.
43. heat tunnel as claimed in claim 31 is characterized in that, this fan can be dismantled from gas feeder.
44. heat tunnel as claimed in claim 31 is characterized in that, this heat tunnel also comprises the side air flue, and its guiding hot air crosses described transmission chain belt.
45. heat tunnel as claimed in claim 44 is characterized in that, this heat tunnel also comprises the supplemental heat source that is used for this side air flue.
46. heat tunnel as claimed in claim 44 is characterized in that, this side air flue has the opening that can regulate.
47. heat tunnel as claimed in claim 44 is characterized in that, this heat tunnel also comprises the diffuser that is positioned on this side air flue.
48. compound type gas feeder that is used for providing the heat tunnel of hot air to article by the shrink wrap parcel, this gas feeder comprises heated air source, fan, hot air pressure stabilizing chamber, air flue and return-air pressure stabilizing chamber, and this fan blows hot air from this heated air source to this hot air pressure stabilizing chamber.
49. compound type gas feeder as claimed in claim 48 is characterized in that, a plurality of compound type gas feeder series connection can be provided with, thus the heat tunnel of acquisition different length.
50. compound type gas feeder as claimed in claim 48 is characterized in that, this hot air pressure stabilizing chamber and cross section convergent hot air moving direction traversed by, and, the sectional area of this pressure stabilizing chamber is along with reducing gradually away from this fan.
51. compound type gas feeder as claimed in claim 48 is characterized in that this gas feeder also comprises the detouchable central airway, it receives the hot air from this hot air pressure stabilizing chamber.
52. compound type gas feeder as claimed in claim 51 is characterized in that this gas feeder also comprises supplemental heat source, the air of this central airway is passed in its heating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/680,538 | 2003-10-07 | ||
| US10/680,538 US7155876B2 (en) | 2003-05-23 | 2003-10-07 | Heat tunnel for film shrinking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1890153A true CN1890153A (en) | 2007-01-03 |
Family
ID=34911103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004800364125A Pending CN1890153A (en) | 2003-10-07 | 2004-10-06 | Heat tunnel for film shrinking |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1890153A (en) |
| MX (2) | MXPA06003842A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015961A (en) * | 2013-03-01 | 2014-09-03 | 克罗内斯股份公司 | Adjustment portal, shrinking device and method for adjusting shaft walls |
| CN110494288A (en) * | 2016-09-13 | 2019-11-22 | Mr印刷设备股份公司 | Mostly band and multizone drying textile device |
-
2004
- 2004-10-06 MX MXPA06003842A patent/MXPA06003842A/en active IP Right Grant
- 2004-10-06 CN CNA2004800364125A patent/CN1890153A/en active Pending
- 2004-10-06 MX MX2009009928A patent/MX353726B/en unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104015961A (en) * | 2013-03-01 | 2014-09-03 | 克罗内斯股份公司 | Adjustment portal, shrinking device and method for adjusting shaft walls |
| CN104015961B (en) * | 2013-03-01 | 2016-04-06 | 克罗内斯股份公司 | Regulate suspension bracket, constriction device and be used for the method for adjust well barrel |
| CN110494288A (en) * | 2016-09-13 | 2019-11-22 | Mr印刷设备股份公司 | Mostly band and multizone drying textile device |
Also Published As
| Publication number | Publication date |
|---|---|
| MX353726B (en) | 2017-12-20 |
| MXPA06003842A (en) | 2006-07-03 |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20070103 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |