KR900004900B1 - Pin oven for curing can bodies and a pin oven louver panel therefor - Google Patents

Abstract

The pin oven chamber is divided by an interior louvre wall into a curing medium supply plenum chamber through the oven on a pin conveyor and jet nozzles in the louvre wall are arranged in a pattern for instantaneously confronting moving can bodies with the same number of nozzles for immersing the can bases in a uniform air stream to minimise can flip-flopping on the pin conveyor in order to achieve oven speeds in excess of 1000-1200 cans per minute. The louvre wall has chambers for uniformly distributing the pressure and velocity of air jets to reduce the tendency of cans to pulsate as they pass through the oven. The louvre walls are of modular construction for application of the oven to a variety of can sizes and decorating or coating technologies.

Description

Fin ovens for hardening can bodies and inner louver plates of these pin ovens

1 is a cross-sectional side view of a fin oven showing an air supply plenum chamber, a hardening chamber and an air recovery plenum chamber.

FIG. 2 is a cross sectional view taken along line 2-2 of FIG. 1 showing the passage of the can body passing through the oven.

FIG. 3 is an enlarged cross-sectional view along line 3-3 of FIG. 2 showing the distribution of air towards the can body.

4 is an enlarged partial sectional view along line 4-4 of FIG.

5 is a partial schematic view of the vertical and return feed passages showing the effect of centrifugal force on the can body being conveyed and the preferred nozzle shape.

* Explanation of symbols for main parts of the drawings

10: pin oven 12: oven chamber

14 box-shaped structure 16 front wall

18: rear wall 20: upper wall

22: bottom wall 24: end wall

32: air supply plenum chamber 34: hardening chamber

42: conveyor 43: conveyor pin chain

44: sprocket member 48: hardening passage

50, 51: station area 52: inlet sprocket

53 outlet sprocket 62, 64, 66: punched hole or nozzle

84: nozzle 86: pressure drop chamber for air calibration

Two-element metal cans are widely used to pack various types of foodstuffs, especially beer and beverages. Typically, one element of such a can is an open end can and the other is a can end for sealing the can, which can is made of aluminum or steel. During the manufacturing process of the can, the outer surface of the can is embellished (printed) with something like a trademark and the like and painted with varnish to protect the surface of the printed can. In addition, for steel cans and some aluminum cans, the outer surface of the can is coated prior to printing, but recently the inside of the can is also coated for hygiene.

In order to properly perform ink coating, ie printing, it is necessary for the cans to be "baked" in the oven after coating, ie printing. In addition, baked and dried cans must be cooled in a chiller attached to the oven, and a series of cans are housed and transported through the curing oven and cooler to cure the coating on the outside of the can, ie surface printing and painted varnish. The can is heated in a pin oven with a pin conveyor in the form of an endless conveyor chain with pins. In a typical fin oven, the conveyor chain is arranged in a serpentime path, and the conveyor which transports the cans in this passage makes several vertical passages through drying in the oven, ie the curing zone and the cooler. The pin conveyor, which transports the cans, is initially moved vertically upwards through the first passageway and then into a second passage, which is reversed to move vertically downwards, until the cans leave the oven and the cooler. Continues. As the can passes through each passage, a series of hot air jets from the nozzles placed along the passages are used to heat the can's exterior coating, ie, to heat the printed portion and similarly to cool through the cooler. The can is cooled by air.

For an efficient manufacturing process, it is desirable for the can to be moved through the oven as quickly as possible. Under conventional operating conditions, the pin oven was able to cure approximately 1000 to 1200 cans per minute. However, in the prior art, since the can is transported on a pin extending into the open end of the can, the can being transported is “rattled” due to the influence of the centrifugal force as the direction of the can is reversed at each end of the vertical path. This occurred. In addition, when the cans are inverted in each direction, they are subjected to a series of pulsations from the air jet for curing when entering each of the vertical passages. At speeds at which the can hardens above 1000-1200 per minute, there is a rattle and tends to cause unacceptable damage to the air jet pulsation and damage to the can due to the can falling off the transfer pins. Is generated. Since damaged cans cannot be used, therefore the fin oven is currently limited to the above speed range.

According to the current fin oven design, the oven is divided by an inner wall into three chambers comprising an air supply plenum chamber, a curing chamber and an air recovery plenum chamber containing hot curing air. The inner wall is a louver wall forming a supply plenum chamber to inject a curing air jet into the curing chamber, and a perforated forming of an air recovery plenum chamber to receive the curing air injected from the curing chamber. Includes walls.

The louver wall and the perforated wall are arranged face to face in a generally parallel plane to form a hard chamber. The louver walls are perforated with an extended nozzle phenomenon along each vertical passage and along a circular passage connecting alternating passages up and down through the oven. In the vertical passage the nozzles are arranged in a typical bundle configuration consisting of four nozzles laterally spaced at both sides of the vertical path centerline through which the can is conveyed. Each bundle here is located on a given center in the conveying direction.

This bundle of nozzles sprays an air jet that strikes the base of the can body, and a series of inclined nozzles face the can's sidewalls to direct hot air towards the can wall to cure the can body. Spaced apart. These nozzles spray discontinuous hot air jets that hit the hardened surface. The present applicant has a nozzle design that has been used so far, the pulsation of the air jet is injected into the can body when the can is transported at a speed higher than the 1000-1200 can / minute of the can, which can actually cause an unstable state of the can body Done. This increases the damage of the cans and increases the cans falling from the transfer pins.

In conventional designs, the circular passage between the vertical passages generally has a pair of nozzle rows in the vertical divider along the inner and outer radii of both transfer centerlines. Here, due to the influence of centrifugal force, the circular passage acts as a factor causing disturbance of the can body. Such a nozzle design has a problem in that when the speed of the can is high in the circular passage area, the stability of the can is not increased.

In today's ovens it is common to attach a louver wall to the oven wall, where the rear surface of the louver wall is made of iron made of iron arranged vertically and / or horizontally to withstand the pressure of the air supply plenum chamber reaching 18 psi. Is reinforced by. The pressure drop wall can also be used behind the lubium wall to cover the entire length of the louver wall, whereas the pressure drop wall is not used and the reinforced louver wall is formed as a single split member between the air supply chamber and the hard chamber. Sometimes. The steel-angled angles and pressure drop plates used in these two cases promote the turbulence of the air jet for curing in the oven and the air jets injected through the louver walls, which in particular can convey the can at high speed. If so, there is a problem that can cause instability of the can including rattling on the transport pins.

In the design and construction of a pin oven, the shape of the nozzle for injecting a hot air jet to cure the can body is specifically determined for a can body of a given size so as to obtain a suitable curing state for a particular can body. In addition, the oven speed is also selected according to the required residence time of the can body in the curing zone, and the residence time is determined within a wide range by the coating type or the ink used and the solvent type used. Indeed, can makers want to cure cans of one oven to several sizes, and as a result there can sometimes be serious inconsistencies in can size, oven speed and nozzle pattern. Thus, cans that do not meet these conditions lose stability as well as temperature uniformity when passing through the oven. Without uniformity of temperature here the can body may be excessively hardened in some zones and slightly hardened in other zones. As noted, the instability of the can results in damage to the can.

Therefore, the pin ovens currently in use are limited to a speed range in which about 100-1200 cans are transferred per minute, the ovens are designed for cans of a given size, and in practice the ovens are used for cans of different sizes. As a result, cans and ovens often fail to match. Such inconsistencies can result in cans that are damaged in the body or the paint (printing) due to inadequately hardened cans, burned cans and unstable transfer through the oven.

The nozzle shape currently in use has a tendency to pulsate the can on the pin where the can is conveyed, causing instability and damage of the can, especially at high speed ranges.

The present invention is directed to a new and useful pin oven which allows the can to be fed at a higher feed rate than the conventional 1000-1200 cans / minute, to simplify rattling and to stably transfer the can through the oven.

According to the invention, each of the vertical passages of the oven is made of a unique louver design that reduces the pulsation of the hardening air jet against the bottom of the can body and the cylindrical sidewalls. The vertical passages are provided with spaced louvers that generate a convergent air jet, where the air jet forms a continuous film of air towards the center-cylindrical portion of each of the can bodies being transported over the pin conveyor. The louver is provided with a continuous nozzle configuration in which a continuous air jet is directed towards the base of each can. The action of the converging air film is effective to draw out the air jet along the can's sidewall to promote curing.

According to another feature of the invention, one main louver portion has a louver surface on which several winding paths through which cans are moved through an oven are arranged, each of which is made according to the invention. The main louver section additionally includes several pressure drop chambers corresponding to the louver passages. In a preferred embodiment the six louver passages with pressure drop chambers are combined in a unitary structure to form a main louver portion. This number of upper radial return portions with the louver front face and the pressure drop plenum chamber also form part of the main louver portion and form a circular passage connecting adjacent passages in the sinuous can passage. In this form the main louver as a unit can be mounted to the oven wall by bolts or welding, and in practice the main louver portion has several modularized lower radii which form a circular passage connecting the lower end of each passage. It is mounted on the return part. The upper and lower radial return portions have perforated louver surfaces with nozzles designed according to the present invention. This lower radius return portion is similar to the upper radius return portion in that it has a pressure drop air plenum chamber. Due to the design of the main louver and the bottom radial return, the hardening air is removed from the air supply plenum chamber in such a way that the turbulence of the air jet can be minimized, the stability of the can can be improved, and a higher working speed can be obtained. Air jet flows into the hardening chamber in a direction substantially perpendicular to the front louver surface perforated through the pressure drop plenum.

The perforated louver portion with air nozzles according to the present invention can provide a suitable air jet form for cans with a predetermined size range and have a high oven speed of up to 1500 cans / minute. Such parts can be designed to be individually replaceable so that the can manufacturer can change the oven plate for optimal hardening of various shaped cans.

It is therefore an object of the present invention to provide a pin oven with a unique louver design for air jet injection which significantly increases the speed of the pin oven by reducing unwanted can movement and thus reducing can damage.

Another object of the present invention is a fin oven which injects an air jet to form a convective air jet that forms a continuous air flow to cure the base and the lower sidewall and a continuous air film to cure the top side wall of the can. To provide.

It is a further object of the present invention to provide an air form of air jet that helps to harden the can and significantly reduces the pulsation of the can.

Another object of the present invention is to increase the oven speed to a can speed up to 1500 cans / minute.

Another object of the present invention is to submerge cans in a continuous air film for smooth and rapid curing, thereby reducing the residence time of the cans in the oven and allowing small ovens to be used as well.

Another object of the present invention is to provide an oven louver plate having a nozzle shape suitable for various can shapes such that a standard oven can be used for various shape can bodies.

It is a further object of the present invention to provide a modular louver that can be improved in fabrication, maintenance and operation in an oven for curing cans.

Other objects of the present invention will be apparent to those skilled in the art through the following embodiments with reference to the drawings.

In the drawings, in particular in FIGS. 1 and 2, the fin oven 10 according to the invention is characterized by the front wall 16, the rear wall 18, the top wall 20, the bottom supported by the oven frame 26. A sealed oven chamber 12 formed by a box-like structure 14 having a wall 22 and an end wall 24. The oven chamber 12 is coated by means of an upright wall member 28 and 30 therein with an air supply plenum chamber 32 for hardening media, usually hot air, and a coating, printing or varnishing on the outside of the can. And the air recovery chamber 36 for recovering the air to the recirculation fan 38 and the burner 40 to reheat the air. In general, the pin oven is slightly inclined from the vertical line as shown in FIG. 1 so that the can body is easily supported by the pin conveyor, and in the following description, the passage through which the can passes through the oven may be a vertical passage and a reversal zone. It is described as a sinuous passage.

The can body C is preferably by a pin conveyor 42 comprising a conveyor pin chain 43 having an extended can transfer pin 56 (FIG. 3) positioned spaced 5.25 inches along the length of the chain. Conveyed through the oven. The chain is mounted in a serpentine shape over a series of upper and lower sprocket members 44 to form the conveying passages shown in FIGS. 2 and 5 along the centerline 46 of the conveyed chain and generally A series of vertical passages 48 are characterized in that they are connected to the upper and lower circular inversion zones 50, 51. The sprocket includes a reversing sprocket 55 in the middle of the circular reversal zone 50 and 51 which forms between the inlet 52 and the outlet sprocket 53 and the vertical passage 48. .

The sprocket 44 is supported by an oven and is suitably rotatably mounted on a heat shrinking hub 49 in a shaft 54 which is driven in a conventional manner. The chain is coupled with a series of pins 56 to receive and transport the can through the oven.

The inner louver wall 28 forms a series of spaced cure passages 48 through which the can passes as it passes through the oven. For example, the first curing passage of the oven extends from the inlet sprocket 52 to the first reversing sprocket 55 along the surface of the inner louver wall. Conveyor pin chain 43 extends tangentially between the sprockets along the centerline 46 of the conveyed chain, indicating the passageway through which the can body passes, and the inner louver wall is an inlet passageway and intermediate to enter the first vertical passageway. The middle series includes upper and lower radially rotating portions 58, 60 forming the reversing zones 50 and 51. As shown in Figs. 2, 3 and 5, the inner louver wall is provided with a plurality of rows of perforation holes 62 arranged on both sides of the centerline 46 of the chain of the transfer passage. This row of drilled holes extends over almost the entire length of the vertical transfer path 48 between the sprockets 44. In addition, a hole hole row 62 is provided. This row of drilled holes extends over almost the entire length of the vertical transfer path 48 between the sprockets 44. Further, the perforation rows 64 and 66 extend along concentric circles in each of the inversion zones between the vertical passages. It will be appreciated that for each rotation radius the inner nozzle shape 64 includes a single nozzle row and the outer nozzle shape includes a plurality of successive rows of perforations 62. Each of the perforation holes acts as a nozzle, in which hot air jets are injected from the air supply plenum chamber 32 so that each can body C hits the bottom plate 68 to cure the bottom plate and to support the can at the transfer pin. do.

As shown in FIG. 5, the can C is transported around each sprocket through the inversion zones 50 and 51 under the outward centrifugal force when it exits the straight hardening passage. The arrangement of nozzles in this rotation radius is generally uniform and provides a stabilizing effect on the can passing through the rotation radius. Furthermore, as each can exits the inversion zones 50 and 51 and enters a straight curing passage 48, the centrifugal forces acting on the can and the nozzles 62, 64, 66 at each inlet opening. Air jets blown through the can act on the can, minimizing the rattling on the can transfer pins.

The nozzle shape of the inner louver wall also includes spaced side louvers 70 located on both sides of the can passage 46 through each of the vertical passages as shown in FIGS. 3 and 5. Each of the side louvers 70 includes an angled header 74 forming an air chamber 76 having a front wall 70 and a side wall 80 integrally formed with the inner louver wall 28. . Each of the front walls 78 is arranged at an acute angle θ to the louver wall 28 so that in each curing passage the front wall of the louver moves the converging air jet (indicated by the arrow) through the oven to the upper wall portion ( 82). The front wall of each of the side louvers is perforated to form a nozzle 48 through which an air jet is injected to cure the can body, and preferably, a perforation hole in the front wall 78 acts on the side wall of the can. It is densely arranged in the center to provide a film of air.

According to another feature of the invention, each of the louver walls 28 is an air calibration formed by the perforated backplate (calibration plate) 88 and the sidewalls 90 without holes shown in FIGS. 3 and 4. And a pressure drop chamber 86 for each. By this arrangement, the air from the recirculation fan 38 reaches the pressure drop chamber 86 and the nozzles 62, 84 and flows in a direction substantially perpendicular to the louver wall 28. The holeless sidewall 90 is designed to prevent lateral movement of air in the event of pressure differences between neighboring pressure drop chambers 86 or when there is a pressure differential in the air supply plenum chamber 32. It extends over the vertical length.

With the arrangement of the nozzles 62, 84 and the individual air calibration plates 88 attached to the louver walls, the pressure and velocity of the air impinging on each can are fairly uniformly distributed, thus causing the can to pulsate. The tendency is reduced so that cans are conveyed stably as they pass through the oven.

As shown in FIG. 3, the nozzle 62 generates a generally uniform pressure, velocity, and distribution of cohesive air flow so that each of the cans passes through the canal bottom 92 as it passes through the vertical passage. Immerse in hot curing air. No pulsation occurs as the can is transported, and at the same time, the air nozzle 84 injects an air jet to impinge the upper portion 82 of the can sidewall. Since the air nozzles are spaced apart, air hits the upper and lower portions of the can sidewalls and the middle sidewall portion 94 of the can body to blast the air jet into a substantially continuous air film. This air membrane is fairly uniform in pressure, velocity and air distribution, so that even at high can speeds, the can body on the feed pins pulsates very little. The air membrane also allows air jets to flow along each sidewall of the can for uniform curing of the can body.

In the lower and upper rotation radius, the can body is slid outward on the can transport pin 56 due to the influence of the centrifugal force as shown in FIGS. 3 and 5. The Applicant concluded that a plurality of rows of air nozzles 62 continuous up to the radius of rotation provide a nozzle 66 that provides stability to the can body by minimizing rattling caused by air jets striking the base of the can body. . These multiple nozzle 66 rows are located along the outside of the circular path to the transfer centerline of the pin conveyor. The single nozzle 64 rows also follow the inside of the inner circular path.

Outer and inner nozzles inject an air stream covering the bottom of each can with little orno pulsation caused by variations in air pressure, velocity, or air distribution.

The choice of spacing and orientation of the nozzles in both the nozzle 62 and the nozzles 84 in the sidewalls is largely determined by the shape of the can body and the process conditions for curing the specially coated can body. As shown in FIGS. 3 and 5, the nozzles 84 of the side walls are oriented to inject air jets that impinge on the upper body of the can side walls, the upper body of the can being flanged and secured to the can end. It must be strong enough so that this part becomes a relatively heavy part of the can body. [Theta] representing the air jet angle with respect to the base plate will vary depending on the length of the can side wall and the size of the can to be processed so that proper jet of air jet is performed. The size and spacing of the nozzles themselves are selected in consideration of the collectively jetted air jets that form a uniform air distribution of air film to eliminate pulsations.

Since the nozzles 62, 64, and 68 are spaced to cover the entire can base with a uniform distribution of air flow, the base of the can body is instantaneously approximately equal in number for each vertical passage and rotation radius. The jets of air impinge on it and are immersed in a generally uniform air stream. According to a particular embodiment of the present invention, the cans used to make 12 oz beverage cans with outer parts printed on conventional beer cans are sprayed with an air jet at θ of about 30 ° at an air temperature of 430 ° F. It can be cured at oven speeds up to 1500 cans per minute using 3/8 "diameter sidewall air nozzles located on a 4" center. Similarly, the nozzles are arranged as three misaligned rows on either side of the can transfer centerline and are located on the 3/4 "center with 1/4" diameter.

According to another feature of the invention, a main louver wall comprising several vertical passages and an upper radial return zone is formed in an integrated main louver plate which is installed and removed from the oven as a single unit. Similarly, the lower radius return zone is formed in a single plate for installation and removal from the oven. This single structure provides a high can hardening rate of up to 1500 cans per minute through the oven by providing a preferred air jet flow as described above. As shown in FIG. 2, the main louver plate 96 includes several vertical passages 48 and a corresponding number of upper radius return zones 58. The corresponding lower radius return plate 98 has one more return zone 90 than the upper radius return zone because it must have an inlet along the exit of the adjacent main louver plate 96.

2, 3, 4 and 5, the preferred embodiment of the main louver plate 96 has six vertical passages with three upper return zones 58.

The front wall 28 (FIGS. 2 and 3) of the main louver plate has respective vertical passages 48 oriented along the centerline 46 of the chain being conveyed and the nozzle 62 (as described above). 3) and nozzle 84. Each of the vertical passages has a separate pressure drop prenum chamber 86 formed by a perforated pressure drop 88 and a holeless side wall 90, an upper wall 97 and a lower wall 99 (FIG. 4). This holeless wall has a hardened chamber 34 in which air flow is substantially perpendicular to the louver wall 28 through the pressure drop chamber 86 from the air supply plenum chamber 32 (FIGS. 1 and 4). Helps to flow Adjacent vertical passages are connected to each other by the spacer plate 100.

As shown in FIGS. 2, 4, and 5, each of the main louver plates 96 also includes three upper rotation radius portions connected to neighboring vertical passages. Each upper turn radius includes a perforated wall 50 with a nozzle shape as shown, a perforated pressure drop 88 and a wall without holes 97, sidewalls 102 (FIG. 2) and Top wall 104 (FIG. 4). The top wall includes a top plate 106 for attaching the main louver plate to the oven frame 26. Appropriate ferrules 108 are provided to ensure that the sprocket and drive shaft assemblies 44, 54 (FIG. 1) that support, guide and move the conveyor chain operate correctly. The hardening air passes through the pressure drop plenum chamber in a direction substantially perpendicular to the front plate through which the hardened air passes through the nozzles 62, 64 and 66 through the perforated rear wall. Here, the top wall, the bottom wall, and the side wall without holes are made to flow as described above.

The lower end of each of the main louver walls ends in an open channel 11 (FIG. 4) provided at the upper end of the lower radial feedback plate 98.

In FIG. 2 and FIG. 4, the lower radial feedback plate is manufactured in a standardized form with a portion engaging (shown in FIG. 2) the lower drive portions of six neighboring vertical passages. The lower radius return portion is perforated front plate 112 (FIG. 4) having the nozzle shape as described above, from the air supply plenum chamber 32 through the pressure drop chamber 116 to the hardening chamber 34. It has a perforated pressure drop back plate 114 for passing hardening air. The top wall 118, the bottom wall 120, and the shaft wall 122 (FIG. 2) are not perforated, and form a pressure drop plenum 116, and air is applied to the front plate 112. Allow it to flow vertically. The lower part of the pressure drop plenum is combined with the metal ring to operate the sprocket and drive the assembly to support, guide and move the conveying chain driven from the lower part.

In addition, the mounting channel 124 is placed in the form of wrapping the support beam 126 to fix the lower radius plate to the oven frame 26.

Thus, since the main louver plate 96 and the lower radius return plate 98 are of a single box structure, no reinforcing steel is required to withstand the air pressure of about 18 psi in the air supply plenum chamber. The plates also have pressure drop plates 88 (FIG. 3) for each of the louver passages separated from each other to prevent lateral air flow along the rear face of the louver wall 28. FIG. This louver plate is designed to remove the accumulated condensate and to change the coating technology system, to clean and replace the plate as required and to exchange the plate when converted to a can size that cannot be cured by a given plate design. It makes it easy to remove each of the air calibration plates for the same periodic maintenance work. Some main louver plates mount the main louver plate and its bottom channel 110 (FIG. 4) over the upper part of the lower louver plate and bolt the top plate 106 and sides near the lid and louver plate of the oven. It is assembled in the oven by bonding.

The louver plate may be assembled to form a louver wall having six vertical passages or 24 vertical passages. The oven size and number of vertical passages depend on the residence time required for proper curing in the oven, which is then determined whether the can is aluminum or steel, and the type of coating used. Typically six vertical passages are suitable for the shortest curing time, and 24 vertical passages are suitable for the longest curing time.

In the pin oven according to the invention, the upper limit of the can passing through the pin oven by reducing the can body rattles in the transition between curved and linear motion and reduces the can rattles in the curing zone. The speed is increased up to 1500 cans per minute. The cooling zone of the oven is also combined with the main louver plate and the lower louver plate and achieves the advantages and objects of the present invention.

In practice, the improved nozzle design according to the present invention infiltrate cans that are moved in a continuous air film that performs uniform and rapid heat transfer to cure the coated portion exceptionally, further reducing the residence time of the cans in the oven. This can reduce the size of the oven.

In special cases, all vertical and louver paths may be changed to horizontal louver paths.

The invention can be practiced in various ways without departing from the scope of the claims of the invention.

Claims (10)

A pin oven for curing a can body having a base and a sidewall by spraying a curing medium, the pin oven comprising: an oven chamber divided into a curing medium supply plenum chamber and a curing chamber by an inner louver wall; A plurality of spaced oven passages in the hardening chamber formed in the vicinity of the inner louver wall; A series of member can bodies that form a curved transfer passage between adjacent oven passages, lowering the supporting elements facing the inner louver wall and forming a continuous transfer passage of a given center line through each of the oven passages Conveying means arranged over a member of the apparatus; A pair of louver members each extending substantially the entire length of the spaced oven passageway and forming part of the inner wall; It provides a fluid path from the plenum chamber to the louver chamber and provides a series of closely spaced apertures and curved portions of the inner louver wall 28 and curved transfer passages to create a uniformly distributed film facing the can side wall. A front wall coupled to the edge of the louver member, having a plurality of nozzles in the inner louver wall disposed on both sides of the centerline, each of which is oriented at a converging angle with respect to the conveying passage and forms a louver chamber And a sidewall, wherein the angle of convergence is selected such that the air jet is oriented to the upper sidewall of the can body, wherein the nozzles on the inner louver wall are generally capable of infiltrating the base of the can into a generally uniform air stream. The same number of nozzles are arranged in instantaneous confrontation with the moving can base and the oven is 1500 cans / A characterized in that the can body can be cured up to speed can body pin oven for curing. In a pin oven for hardening a can body having a base and a body portion moving to an sinuous passage formed by a continuous center line, one louver plate has a plurality of generally vertical passages, each of which has a vertical passage. Arranged along the centerline of the sinuous passageway and facing the base portion of the can body, the vertical passageway has a plurality of hole rows perforated on both sides of the centerline in the conveying direction, the perforated apertures of which the can is a vertical passageway. As they move through, momentarily the same number of perforated holes are densely spaced to face the can base, and a pair of side louvers form a louver plate, each of which is directed towards the upper body of the can wall. A front wall with perforations to orient the converging curing jets, the holes in the side louvers being canned The oven is generally densely arranged to minimize rattling of the can by applying a constant pressure and speed of curing air to the can, which generally generates a continuous film of air to the side and travels through the vertical passage. A canned body curing pin oven, wherein the can body is cured at a speed. A transfer means for moving the coated can with the base and upper body portion along the winding passage of the oven with means for transporting the base of the can body against the louver plate, the pin for curing the can In the inner louver plate of the oven, the louver plate has several generally vertical passages laid along a given centerline of the can which is moved on its front face and several evenly distributed across each transfer centerline of the vertical passage. Nozzles having a generally equal number of nozzles arranged densely facing the can base so that a generally uniformly continuous stream of air is directed towards the can base, and vertical passages are located on both sides of the transfer center line and the can Multiple side panels orientated to inject air jets that converge toward the upper body portion of each body The side louvers have perforated spaced holes that are densely spaced enough to enclose a side wall of the can body and to create a continuous air film that directs the air jet to flow over the lower portion of the can body side wall. It has a pressure drop plenum chamber for supplying hardening media through the nozzles on the rear side of the louver plate and through the perforation holes of the side louvers. The internal louver plate for the pin oven, wherein the hardening air is formed by the perforated top wall, the bottom wall, and the side wall to flow almost perpendicularly to the inner louver plate through the pressure drop plate and the plenum chamber. An inner louver plate for a pin oven used to cure a can body to cure a jet of a curing medium, the inner louver plate comprising: a plurality of straight and curved passages forming a sinuous passageway laid along a continuous center line; A pair of side louvers placed along either side of the transfer center line with side nozzles for generating an air film converging towards the upper body of the can body, generally equal number of air in each base of the can as it moves through the curved passage A plurality of nozzles in the front surface of the louver plate distributed along the centerline of the curved portion of the transfer center line for instantaneous infiltration into the jet; A first pressure drop plenum chamber arranged along a rear surface of the louver plate facing the nozzle and formed by a perforated pressure drop plate and an unperforated top wall, bottom wall and side wall; And a second pressure drop plenum chamber arranged on a rear surface of the louver plate adjacent to the curved passage, and means for supplying hardening air in a direction substantially perpendicular to the louver plate through the pressure drop plate. It has several rows of nozzles distributed on both sides of the transfer center line, and these nozzles can continuously infiltrate the base of each can in a continuous air stream and instantaneously approximately the same number of nozzles can face the base of the can. Spaced so as to be densely spaced, the main louver plate is an internal louver plate for a pin oven, characterized in that a single structure that can be removed from the oven. A curing medium supply chamber, a curing chamber and a return chamber, a louver plate separating the supply chamber and the curing chamber, means for circulating and heating the curing medium in an oven, and a can base facing the front face of the louver plate. And a pin oven for curing a coated can having means for moving the can through the oven in a sinuous passage with alternating curved and straight passages along a given centerline, wherein the louver plate is placed along the can transfer centerline. Each of the straight passages is uniformly across the feed center line with several generally straight passages and a pressure drop plenum chamber on the rear face of the louver plate for feeding the hardening medium through the perforated holes in the nozzle and side louvers. Each can base to distribute a distributed and nearly uniform continuous airflow towards the can base. It has several nozzles that are densely positioned to face the same number of nozzles instantaneously, the straight passages are located on both sides of the transfer center line and send a condensing air jet towards the upper body portion of each can body. Multiple side louvers oriented so that the side louvers surround the can body sidewalls and form densely spaced perforations to generate a continuous air film to induce an air jet to flow over the lower portion of the can body sidewalls. The plenum chamber includes an air calibration pressure drop plate and an unperforated top wall, a bottom wall, and a perforated body for flowing a curing medium through the pressure reinforcing plate and the curing chamber in a direction substantially perpendicular to the inner louver plate. A pin oven for curing a coated can, characterized in that formed by the side wall. A pin oven for curing a coated end-opened can body, wherein the pin oven comprises a curing medium supply chamber, a curing chamber circulation chamber, means for circulating the curing medium in the circulation chamber, a curing medium. Means for heating, conveying means for conveying cans supported by the pins through alternating straight and curved passages along a continuous center line of the oven, forming an inner wall separating the feed chamber and the hard chamber A main louver plate and a lower radius portion, the main louver plate has a front wall having a front and a rear surface, and the front wall has the sinuous passage so that its front face faces the base of the can being transported. Disposed along, the front wall having a plurality of straight and curved passages opposite the straight and curved portions of the sinuous passage, By injecting the curing media jet into the base of the transfer center line is placed on both sides, located in the front wall along the straight path, and several nozzles are densely spaced to face the moving can with a given number of nozzles. A pair located on both sides of the transfer centerline that infiltrate the heat, the sidewalls of the can, and inject air jets converging towards the sidewalls of the can into a substantially continuous air film to allow air jets to flow across the can body. It is distributed along the middle louver of the side louver and the curved part of the transfer center line, and when the can moves through the curved passage, at the same time, several nozzles infiltrating individual cans into the same number of air jets, behind the nozzles of each straight passage Molded by pressure drop plates placed and perforated along the rear face of the louver plate, and unperforated top walls, bottom walls and side walls. A plurality of first pressure drop plenum chambers, a plurality of second plates disposed on the rear face of the louver plate adjacent the curved passageway and formed by perforated pressure drop plates and perforated top walls, bottom walls and side walls A pressure drop plenum chamber and means for supplying hardening air through the pressure drop plate in a direction substantially perpendicular to the louver plate, the main louver plate having a front wall with front and rear walls, the front wall having The main louver plate is a unitary structure which is arranged along the winding path and has several straight and curved paths. The main louver plate is separated and installed from the oven to support, guide and move the conveyor through the curved path adjacent to the winding path. A lower radius plate having a perforated front wall and a rear wall and an unperforated top wall, a bottom wall and a side wall, the perforated The front wall has a series of nozzles arranged along the centerline of the curve such that the base of each conveying can instantaneously faces the same number of nozzles, the main louver plate is mounted on a lower radius plate forming an inner wall, And the lower radius plate is provided with means for supporting, guiding and moving the conveyor through the curved passageway of the adjacent sinuous passageway. In an internal louver plate for a pin oven for curing a coated can body having a base portion and a body portion, the louver plate has a front wall that forms a plurality of generally vertical passageways located along a transfer center line of a given can, Each of the vertical passages has several nozzles therein and several side louvers positioned on both sides of the transfer center line and oriented to inject air jets converging toward the upper body portion of each can body. The silver drop plenum chamber has a plurality of pressure drop plenum chambers on the rear surface of the louver plate for supplying the hardening medium through the silver nozzle and the side louver perforations of several vertical passages. The descent and flow through the plenum chamber in a direction substantially perpendicular to the front wall of the inner louver plate and between the vertical passages. For pin ovens, characterized by being formed by the front wall, perforated air pressure drop plate and unperforated top wall, bottom wall and sidewalls to remove the air flow moving laterally to the rear face of the front wall. Internal louver plate. An internal louver plate for a pin oven for curing a can body by spraying a hardening medium, comprising: a plurality of straight and curved paths placed along a continuous center line to form a substantially winding passage, each of which is a straight path Has a plurality of nozzle rows distributed on both sides of the transfer center line, each base of the can is continuously submerged in a continuous air stream, and instantaneously the same number of nozzles can be faced to the base so that Sized and spaced according to a given range of sizes, a pair of side louvers are located on both sides of the transfer center line and have side nozzles for generating an air membrane that converges towards the upper portion of the can body, the louver plate The nozzles located on the front face of the can are distributed along the center line of the curved portion of the transfer center line. When moving through the furnace, each case of the can is instantaneously encased in approximately the same number of air jets, and the body of the can being transported in the continuous air membrane to prevent rattling of the can when passing through the vertical passageway. An inner louver plate for a pin oven, characterized in that a means for supplying a curing medium through a nozzle is inserted therein. In a pin oven inner louver plate for curing the can body by spraying a hardening medium, the louver plate is placed along a continuous center line to form a plurality of straight and curved passages, each of which is a straight passage. Has a plurality of base nozzle rows which are classified according to a range of can body sizes given on either side of the transport center line and are spaced apart, thereby continuously infiltrating each can base into a continuous air stream and A pair of side louvers, the plate, which allows the nozzle to face substantially the same number of times as the base, are arranged along both sides of the transfer center line, and have side nozzles for sending a converging air membrane towards the upper portion of the can body. A plurality of nozzles located on the front face of the nozzle may be distributed along the center line of the curved portion of the transfer center line. Several nozzles disposed on the front face of the louver plate and the can's base is instantaneously submerged into approximately the same number of air jets as the can travels through the curved passages, and a continuous air film is quickly and uniformly And means for supplying a curing medium through the nozzle to provide curing and reduce oven residence time. A pin oven for curing a can body having a base and a sidewall by spraying a curing medium, the pin oven comprising: an oven chamber divided into a curing medium supply plenum chamber and a curing chamber by an inner louver wall; A plurality of spaced oven passages in the hardening chamber formed in the vicinity of the inner louver wall; A series of members forming a curved transfer passage between adjacent oven passages, the base portion of the can body having elements for supporting the inner louver wall facing each other and forming a continuous transfer passage of a given center line through each of the oven passages Conveying means arranged over a member of the apparatus; A pair of louver members each extending substantially the entire length of the spaced oven passageway and forming part of the inner wall; A fluid path from the plenum chamber to the louver chamber provides a series of closely spaced perforations to create a uniformly distributed film towards the can side wall, and adjacent portions of the inner louver wall and both sides of the centerline along a curved feed passage. With a plurality of nozzles in the inner louver wall disposed in the float, wherein the centerline of the curved feed passage forms an outer and inner circular passage and is located along the inner circular passage and several nozzle rows located along the outer circular passage. And a single nozzle row, each of which is formed by a front wall and a sidewall oriented at an angle to converge with respect to the conveying passage and coupled to the edge of the louver member to form a louver chamber, wherein the convergence The angle at which the air jet is directed is directed to the upper sidewall of the can body, the angle being in the inner louver wall The nozzles are arranged in an instantaneous face-to-face manner with a moving base of approximately the same number of nozzles so as to infiltrate the base of the can in a substantially uniform air flow. The oven cures the can body to a rate of 1500 cans / minute. Can body curing pin oven, characterized in that can be made.

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