MXPA98002724A - Method and improved system of blowing in mass fund - Google Patents

Abstract

The present invention relates to a method for blowing melt material comprising: dispensing a first fluid from a first orifice to form a first fluid flow at a first viscosity, dispatching a second fluid of no more than two seconds holes associated with the first orifice to form the second fluid flows separately and a second velocity substantially along opposite flanks of the first fluid flow, convergently directing the second fluid flows provided to the first fluid flow; first fluid flow with the second fluid flows separated at a second velocity greater than the first velocity of the first fluid flow, where the extraction of the first fluid flow is attenuated to form a first flow filament

Description

METHOD AND IMPROVED METHOD OF MELTED MASS BLOWING REFERENCE TO RELATED REQUESTS This application is a continuing part of the E.U. No. 08 / 683,064 simultaneously pending, filed July 16, 1996, entitled "Hot Melt Adhesive Applicator With Gear Driven Measuring Head" (Hot Melt Adhesive Applicator Wi th Melting Gear-Dri Ven Head) Simultaneously Pending with EU Application No. 08 / 734,400 filed on October 16, 1996, entitled "Fluid Flow Control Plates for Hot Melt Adhesive Applicator" (Fl uid Fl ow Control Plates for Hot Mel t Adhesive Applicator) and the EU application simultaneously pending No. 08 / 717,080 filed October 8, 1996, entitled "Method and Blown Melt Apparatus", (Mel tbl owing Method and Appara tus) all these are commonly assigned and incorporated herein by reference BACKGROUND OF THE INVENTION The invention relates generally to meltblown methods and systems and more particularly to meltblown and parallel plate meltblown assemblies. Figures of the meltblown system used to precisely control the distribution and uniform application of melt blown filaments on moving substrates. The meltblowing process in forming fibers or filaments conducts and attenuates a first fluid flow with shearing force from flows of a second adjacent fluid at relatively high velocity. Molten thermoplastic flows, for example, can be conducted and attenuated through heated air flow to form meltblown thermoplastic filaments. Generally the melt blown filaments may be continuous or discontinuous, and the range in size varies between several tenths of one micron and several hundred microns depending on the meltblown material and the application requirements. Initial applications of the meltblown processes include the formation of non-woven fabrics from the conduct of meltblown filaments to hesitate chaotically. More recently, meltblown processes have been used to form melt blown adhesive filaments to adhere substrates in the production of a variety of absorbent articles from physical fluids, such as disposable diapers and incontinence pads, sanitary napkins, covers beds for patients and surgical bandages. However, many of these applications require a relatively high degree of control in the disposal and application of meltblown filaments, particularly meltblown adhesives deposited on substrates which are extremely sensitive to temperature. But meltblown filaments driven to chaotic hesitation are not generally suitable for these and other applications where increased control over the waste and application of the meltblown filaments is required. In the simultaneously pending reference of Application E.U. No. 08 / 717,080 filed October 8, 1996, entitled "Method and Blown Apparatus in Molten Mass". { Mel tblowing Method and Apparatus), incorporated in this document mark a significant advance in meltblown technologies and particularly in meltblown applications that require precise control over the disposal of individual meltblown filaments over the substrates in motion. The concurrently pending application is generally conducted to parallel plate die assemblies having a plurality of adhesive and air delivery orifices arranged in a variety of spatial configurations to distribute the melt blown adhesives, and more particularly for relatively precise control of the frequency and amplitude parameters of the individual meltblown filaments providing a selective and uniform application of the filaments on the moving substrates. The present invention is driven to later advances in meltblown technology, and is applicable in the distribution of filaments of meltblown adhesives on moving substrates, especially in the production of absorbent articles of physical fluids. That is why one of the objects of the invention is to provide new methods and systems for the practice of meltblown processes, and more particularly for the application of meltblown adhesives on moving substrates. Another object of the invention is to provide new methods and systems for the practice of meltblown processes by distributing the first and second fluids from the first and second corresponding holes in a die assembly to form second fluid flows together with the substantially opposite lateral flanks of a first fluid flow, where the first fluid flow is conducted and attenuated to form a first fluid filament. A more general objective of the invention is to distribute the first fluid from a plurality of first orifices and the second fluid from a plurality of second orifices to form a plurality of first and second fluid flows, arranged in a formation, where the plurality of the first fluid flows are conducted and attenuated to form a plurality of filaments of the first fluid. It is also an object of the invention to provide novel meltblowing methods and die assemblies for directing the first and second fluid flow in parallel or diverging manner, and it is another object of the invention to provide die assemblies for driving two seconds. fluid flows convergently a first common fluid flow where the first fluid flow is directed parallel or divergently relative to other first fluid flows. An objective related to the invention is to distribute first and second fluid flows having the same flow coefficient of the mass of the first fluid and the same flow coefficient of the mass of the second fluid to provide a more uniform dispatch and control over the blown filaments in melt. It is a further object of the invention to provide innovative methods and systems for the practice of meltblown processes by depositing the first filaments of meltblown fluid on a moving substrate as the filaments hesitate in a non-parallel manner in the direction of the substrate in motion and more generally depositing a plurality of first fluid filaments on the movement of the substrate as some of the pluralities of the filaments of the first non-parallel fluid and other parallel filaments in the direction of movement of the substrate waver. It is a relative object of the invention to control the parameters of hesitation of a first fluid flow through an angle between the first fluid flow and one or more second flange fluid flows, among other variables. Another object of the invention is to provide new methods and die assemblies for melt blowing, comprising a plurality of at least two parallel plates retained by compression between the first and second end plates, and is a relative object of the invention. invention is to place a rivet member through an aperture in the die assembly to retain the plurality of parallel plates in parallel relation while the die assembly is retained by compression between the first and second end plates. It is also another object of the invention to provide new methods and assemblies of meltblown dies coupled to an adapter or intermediate adapter having a mounting surface with an outlet for the first central fluid and an outlet for a second fluid with the order to supply first and second fluids to the die assembly, where the die assembly can be oriented in one or two directions distinguished by 90 degrees through the assembly of the die assembly in, either the adapter or the intermediate adapter. It is a relative object of the invention to rotatably couple the die assembly to the intermediate adapter or to a rotatable copy of the adapter to the nozzle module to allow a rotational orientation of the die assembly relative thereto. It is also an object of the invention to provide new meltblown methods and systems including coupling die assemblies for meltblowing to a fluid measuring device for supplying a first fluid therefrom and for coupling one or more assemblies. of given to a main manifold having correspondence with the supply conduits of the first fluid to supply the first fluid from the fluid measuring device to one or more die assemblies. Another object of the invention is to couple the die assemblies to a main manifold with a corresponding plurality of nozzle modules, where each nozzle module provides first and second fluids to the corresponding die assembly. invention to interconnect the die assemblies to a main manifold with a common nozzle adapter plate, which provides first and second fluids to each of the pluralities of the die assemblies These and other objects, features and advantages of the present invention they will be more apparent on the consideration of the following Detailed Description of the Invention with attached drawings, which can be disproportionate to facilitate understanding, in which the structure and steps have references through corresponding numbers and indicators BRIEF DESCRIPTION OF THE DRAWINGS FIG 1 is the meltblown system including a view and Schematic of a meltblown die assembly comprising a plurality of parallel plates coupled by an adapter to a manifold having a fluid measuring device to provide a first fluid to a plurality of similarly coupled meltblown assemblies to the multiple. FIGS. 2a-2i represent a plurality of individual parallel plates of a die assembly, or body member, according to the exemplary embodiments of the invention. FIG. 3a. is a front view of the plane of a first die retention end plate, for retaining a die assembly of the type shown in FIGS. 2. FIG. 3b is a sectional sectional view along the lines I-I of FIG. 3a. FIG. 4 is a front view of the plane of a second die retention end plate for compression retention of a die assembly in cooperation with the first die retainer end plate. FIG. 5a is a front view of the plane of a die assembly adapter. FIG. 5b is an end view along the lines II-II of FIG. 5a. FIG. 5c is a sectional sectional view along lines III-III of FIG. 5a. FIG. 6a is a sectional sectional view along lines IV-IV of FIG. 6b of an intermediate adapter engageable with the adapter of FIG. 5. FIG. 6b. is a front view of the plane of the intermediate adapter of FIG. 6a. FIG. 6c is a top view of the plane along lines V-V of the intermediate adapter of FIG. 6b.

DETAILED DESCRIPTION OF THE INVENTION FIG. 1 is a meltblown system 10 which is used for the distribution of fluids and particularly hot melt adhesives on a substrate S movable in a first direction F relative thereto. The system 10 generally includes one or more die assemblies 100 for meltblowing, an exemplification in which it is shown having a plurality of at least two parallel plates, engageable with a manifold 200 then having association with a measuring device. of fluid 210 for supplying a first fluid to one or more meltblown die assemblies through supply conduits 230 of the first fluid. The system also has the ability to supply a second fluid in the form of heated air to the die assemblies as detailed more fully in the application E.U. No. 08 / 683,064 simultaneously pending, filed on July 16, 1996, entitled "Heat Cast Adhesive Applicator with Spindle Driven by Gear". According to an aspect of the invention shown schematically in FIG. 1, a first fluid is distributed from a first-orifice of the die assembly 100 to form a first fluid flow Fl at a first velocity, and a second fluid is distributed from the second orifices to form the second fluid flows separately to a second speed F2 together with substantially opposite lateral flanks of the first fluid flow Fl. The first fluid flow Fl located between the second flows of fluid F2, thus forming a formation of first and second fluid flows. The second velocity of the second fluid flows F2 is generally greater than the first velocity of the first fluid flow Fl such that the second flows of fluid F2 conduct the first fluid flow, where the first fluid flow conduction is attenuated to form a first filament of fluid. In the exemplary embodiment, the second fluid flows F2 are convergently directed towards the first fluid flow Fl, but more generally the second fluid flows F2 are directed non-convergent relative to the first fluid flow Fl in parallel or diverging as described more fully in the reference of the EU Application No. 08 / 717,080 simultaneously pending, filed on October 8, 1996, entitled "Method and Blown Mass Melt Apparatus". More generally, the first fluid is dispensed from a plurality of the first orifices to form a plurality of first fluid flows Fl, and the second fluid is dispensed from a plurality of second orifices to form a plurality of second flows of fluids F2 , wherein the plurality of the first fluid flows and the plurality of the second fluid flows are arranged in a series. In convergent-directed fluid flow configurations, the plurality of the first fluxes Fl and the plurality of the second fluxes F2 are arranged in a series such that each of the pluralities of the first fluxes Fl is flanked on substantially opposite sides through the corresponding second flux flows F2 convergently directed as shown in FIG. 1, for example, F2 Fl F2 F2 Fl F2 * »*. In the configurations of the second fluid flows directed nonconvergently, the plurality of the first fluxes Fl and the plurality of the second fluxes F2 are arranged in an alternating series such that each of the pluralities of the first fluid flows Fl is flanked on substantially opposite sides by one of the second fluid flows F2, for example F2 Fl F2 Fl F2 •••, as described more fully in the EU Application No. 08 / 717,080 simultaneously pending, filed on October 8, 1996 entitled "Method and Mass Blowing Apparatus Melt. "The second plurality velocity of the second fluid flows F2 is generally greater than the first velocity of the plurality of the first fluid flows Fl, such that the plurality of the second fluid flows F2 conduct the plurality of the first fluid flows, where the conduction of the plurality of the first fluid flows is attenuated to form a plurality of the first fluid filaments.The plurality of the first fluid flows Fl is generally alternatively directed divergent or parallel or Conversely, according to another aspect of the invention, the plurality of the first fluid flows Fl are distributed from the plurality of the first orifices to the same flow coefficient of the mass of the first fluid and the plurality of the second flows of fluids F2 are distributed from the plurality of the second orifices to the same flow coefficient of the mass of the second fluid. The mass of the plurality of the first fluid flows, however, is not necessarily the same as the flow coefficient of the mass of the plurality of the second fluid flows. Distributing the plurality of the first fluid flows, as well as the flow coefficient of the mass of the first fluid provide improved control and a uniform distribution of the first fluid flows from the die assembly 100, and the distribution of the plurality of the second fluid flows at the same flow coefficient of the mass of the second fluid ensures a more uniform and symmetrical control of the first fluid flows with the corresponding second fluid flows as discussed later in this document. In one embodiment, the plurality of the first orifices have a trajectory equal to the first fluid flow to provide equal flow coefficients of the mass of the first fluid, and the plurality of the second orifices having a trajectory equal to the second fluid flow. to provide an equal flow coefficient of the mass of the second fluid. In convergently directed configurations of the second fluid flow Fl generally have equal flow coefficients of the mass of the second fluid. Although the flow coefficients of the second fluid mass associated with a first fluid flow are not necessarily equal to the mass coefficients of the two second fluids associated with another first fluid flow. Moreover, in some applications, the two second flows of fluid F2 convergently directed towards a first common fluid flow Fl may have an inequality of flow coefficients of the mass of the second fluid to affect a particular control on the first fluid flow. . Also, in some applications the flow coefficients of the mass of some of the first fluid flows are not equal to the flow coefficients of the mass of other first fluid flows, for example the first fluid flows distributed along the portions of the lateral edge of the substrate may have a different mass flow coefficient than other first fluid flows distributed over intermediate portions of the substrate to affect the definition of the edge. Thus, while it is generally desirable that fluid flows from the mass have equal coefficients between the first and second fluid flows, there are applications where it is desirable to vary the mass flow coefficient of some of the first fluid flows relative to other first fluid flows, and similarly to vary the flow rates of the mass of some of the second fluid flows relative to other second fluid flows. FIG. 1 shows a first flow of fluid Fl flickering under the effect of the second flow of flanging fluid F2, which are not shown for clarity. The hesitation of the first fluid flow Fl is generally characterized by a parameter amplitude and a frequency parameter, which are substantially controllable periodically or chaotically depending on the requirements of the application. The hesitation is controllable, for example, by varying a space between the first fluid flow Fl and one or more of the second fluid flows F2, or by varying the amount of one or more of the second fluid flows F2, or by varying a coefficient of one or more of the second fluid flows F2 relative to the coefficient of the first fluid flow Fl. The amplitude and frequency parameters of the first fluid flow Fl are thus controllable with one or more of the aforementioned variables as discussed more fully in the application E.U. No. 08 / 717,080 simultaneously pending, filed on October 8, 1996, entitled "Method and Blown Mass Melt Apparatus" incorporated herein by the aforementioned reference. The hesitation of the first fluid flow Fl is also controllable by varying a relative angle between one or more of the second fluid flows F2 and the first fluid flow Fl. This method of controlling the hesitation of the first fluid flow Fl is used in applications where the second fluid flows are convergent or non-convergent in relation to the first fluid flow Fl. The configurations of the second convergent directed fluid flow allow control of the hesitation of the first fluid flow Fl with a relatively low coefficient of flow of the mass of the second fluid flow compared to the parallel and divergent configurations of the second fluid flow, thus reducing the requirements for heated air. Generally, the first fluid flow Fl is relatively symmetric when the angles between the second fluid flows F2 on opposite sides of the first fluid flow Fl are equal. Alternatively, the hesitation of the first fluid flow Fl can be laterally biased towards one or the other direction when the second flanging fluid flows F2 have unequal angles with respect to the first fluid flow Fl, or by otherwise altering other of the variables discussed in this document. According to another aspect of the invention shown in FIG. 1, a filament of the first fluid flow FF from any or several of the die assemblies coupled to the main manifold, but which are not shown, are substantially periodically wavered non-parallel to the direction F of the movement of the substrate S. The assembly The corresponding die generally includes a plurality of fluid flow filaments FF arranged in a series with non-parallel filament illustrated towards the direction F of the movement of the substrate S. Even more generally, a plurality of similar die assemblies are coupled within the main manifold 200 in series, and / or in two or more parallel series which can be compensated or alternated, and / or not parallel to the direction F of the movement of the substrate S. In the exemplary application, the plurality of the die and the fluid flow filaments are wavered in the directions L transversely to the direction F of the movement of the substrate S. In some applications, s However, it may be advantageous and therefore desirable to waver one or more of the filaments of the first fluid flow FF parallel to the direction F of the movement of the substrate. This is particularly true along the portions of the lateral edge of the substrate, where more precise control over the application of the hot melt adhesive is desired, for example to give effect to the profile of a well-defined edge or boundary. According to this aspect of the invention, the filament of the first fluid flow FF can be waved parallel to the direction F of the movement of the substrate by orienting the series of the first and second holes of the die assembly parallel to the direction F of the movement of the substrate as discussed later. The exemplification of the die assembly 100 of FIG. 1 includes a plurality of plates arranged in parallel and incorporating many aspects of the invention as shown in FIGS. 2a-2i. The plates of FIGS. 2 are assembled one on top of the other starting with the plate in FIG. 2a at the top and ending with the plate in FIG. 2i in the background as a reference. The first and second fluids supplied to the die assembly 100, or of the body member, are distributed to the first and second orifices as discussed later. The first fluid is provided from a first restrictive cavity inlet 110 to a first restrictive cavity 112 in the plate of FIG. 2a. The first fluid is substantially uniformly distributed from the first restrictive cavity 112 through a plurality of the first holes 118 in the plate of FIG. 2b to a first accumulator cavity 120 defined aggregate by the adjacent plates in FIGS. 2c and 2d. The plurality of the first orifices also function as a fluid filter, trapping any residue in the first fluid. The first fluid accumulated in the accumulator cavity 120 is then supplied to a first plurality of slots 122 in the plate of FIG. 2e, which forms the plurality of the first orifices as discussed hereinafter. The second fluid is supplied from a second fluid inlet 131 to bifurcate the inlet arms of the restrictive cavity of the second fluid 132 and 134 formed in the plates of FIGS. 2a-2d, through the corresponding passages 136 and 138 by the plates of FIGS. 2e-2h, and within the restrictive cavities of the second fluid 140 and 142 in the plate of FIG. 2i. The second fluid is substantially uniformly distributed from the second restrictive cavities 140 and 142 separated through a plurality of second holes 144 in the plate of FIG. 2h to a second accumulator cavity 146 defined aggregate by the adjacent plates in FIGS. 2f and 2g. The plurality of second holes 144 also function as a fluid filter, trapping any residue in the second fluid. The second fluid accumulated in the second accumulator cavity 146 is then supplied to a second plurality of slots 123 in the plate of FIG. 2e, which form the plurality of the second holes as discussed later. The plates in FIGS. 2d and 2f cover opposite sides of the plate in FIG. 2e to form the first and second orifices of the fluid distributing orifices. In the exemplary embodiment of FIG. 2, the first holes are oriented divergently relative to each other, and each first hole has associated therein two second holes convergently directed towards the first corresponding hole. This configuration is illustrated more clearly in FIG. 2e. According to a related aspect of the invention, the plurality of the first and second holes of FIG. 2e also have equal trajectories in the fluid flow as a result of the first and second slots 122 and 123 having a similar length in the flow fluid paths formed radially along an arcuate path. The size of the hole is generally between about 0.005 and about 0.152 centimeters per rectangular side generally, where in most applications of meltblown adhesive the dimension of the hole is between about 0.012 and about 0.152 centimeters per rectangular side generally. The first filaments of fluid formed by the meltblown process, discussed herein, generally have diameters in the range of about 1 miera to about 1000 micras. In alternative embodiments, the first and second holes of the die assembly 100 may be oriented parallel or diverging, and the die assembly may include alternating series of the first and second holes. Additionally, die assembly 100 may include plural arrays of the series of first and second holes arranged in parallel, non-parallel, offset parallel, and in different dimensions of planer of the die assembly. These and other features are discussed more fully in the Application E.U. No. 08/717, 080, simultaneously pending, filed on October 8, 1996, entitled "Method and Blown Apparatus in Molten Mass" incorporated in this document through the aforementioned reference, whose other characteristics are combinable with the many characteristics and aspects of the present invention. According to another aspect of the invention shown in FIGS. 1, 3 and 4, the die assembly 100 is retained by compression between an end plate retaining the first die 160 and a second end plate opposite the die 170. The die assembly 100 is retained there through a plurality of bolted members. , which are not shown for reasons of clarity, extendible through the corresponding holes 162 in the corners of the first end plate 160, through the corresponding holes 102 in the die assembly, and inside the second end plate 170, where the bolted members are threaded into threaded holes 172. The individual plates of FIG. 2 that make up the die assembly 100, are not attached, or otherwise retained. The plate is preferably formed by a non-corrosive material such as stainless steel. FIG. 1 also shows that the individual plates of the die assembly 100 retained in a parallel relationship by a single rivet member 180 distributable through the corresponding hole 104, or aperture, formed in each plate of the die assembly 100, which is shown in FIG. FIG. 2, wherein the end portions of the rivet member 180 are protruding within the recesses or pits 164 and 174 in the first and second end plates 160 and 170 when the die assembly 100 is retained by compression therebetween. The individual plates of the die assembly 100 pivoted, or fanned, near the rivet member 180 and thus are further apart for inspection and cleaning. According to a related aspect of the invention, the rivet member 180 is installed when the die assembly 100 is retained by compression between the end plates 160 and 170, which precisely align the individual plates of the die assembly, when the member is driven of the rivet 180 through the holes through the end plates 160, 170 and through the plates of assembly. FIG. 1 also shows that the die assembly 100 retained between the first and second end plates 160 and 170 is coupled to an adapter assembly 300 which is comprised of an adapter 310 and an intermediate adapter 320. FIGS. 5a-5c show several views of the adapter 310 having a first interface 312 for mounting either the die assembly 100 retained by compression between the end plates 160 and 170 directly or alternatively for mounting the intermediate adapter 320 as shown in the exemplary embodiment . The mount interface 312 of the adapter 310 includes a first fluid outlet 314 coupled to the corresponding inlet of the first fluid 315, and an outlet of the second fluid 316 coupled to the corresponding inlet of the second fluid. The intermediate adapter 320 having a first mounting surface 322 with the first and second fluid inlets 324 and 326 coupled to the corresponding outlets of the first and second fluid 325 and 327 in a second mounting interface 321. The first mounting surface 322 of the intermediate adapter 320 is mountable on the first mount interface 312 of adapter 310 to couple the first and second fluid outlets 324 and 326 of intermediate adapter 320 to the first and second fluid outlets 314 and 316 of adapter 310. According to another aspect of the invention shown in FIGS. 5b, 6a and 6c, the outlet of the first fluid 314 of the adapter 310 is centrally located therefrom to engage a centrally located inlet of the first fluid 324 of the intermediate adapter 320. The outlet of the second fluid 316 of the adapter 310 is radially located relating to the exit of the first fluid 314 to couple with the recessed annular outlet of the second fluid 324 in the first interface 322 of the intermediate adapter 320. According to this respect of the invention, the adapter 320 is rotatably adjustable in relation to the adapter 310 for orienting by adjusting the die assembly 100 mounted therefrom to allow alignment of the parallel or non-parallel die assembly towards the direction F of the movement of the substrate as discussed in FIG. this document. And according to the related aspect of the invention, adapter 310 also has a recessed second annular fluid inlet disposed near the inlet of first fluid 315 and coupled to the inlet of second fluid 316, where adapter 310 is rotatably adjustable in relation to a nozzle module 240 or another adapter for coupling the die assembly 100 to the supply of the first fluid as will be discussed later herein. FIGS. 5b and 5c show the first interface of an adapter 310 or intermediate adapter 329 having the first and second recesses of the sealing member 318 and 319 disposed near the outlets of the first and second fluid 314 and 316 in the first interface 312 of the adapter 310. A corresponding resistant sealing member resembling a rubber gasket-0, which is not shown but known in the art, is sealable at each recess to form a fluid seal between the adapter 310 and the intermediate adapter 320. The exemplary recesses are elongated in relation to the outflows of the first and second fluid to accommodate misalignments between the adapter 310 and the intermediate adapter 320 and additionally avoid contact between the first fluid and the sealing member, which can result in premature deterioration of the seal. Also, some of the recesses are oval in shape to more efficiently utilize the limited surface area of the mount interface 312. The inlet of the second fluid 317 and the other interfaces generally have a similar recessed sealing member to form a fluid seal with the corresponding frame members that are not shown. FIG. 1 also shows a metal sealing member, or packing 330, disposed between the adapter 310 and the intermediate adapter 320 for use in combination with the resistant sealant member discussed above or as an alternative thereto, which may be required in food processing and other applications. The metal sealing member 330 generally includes the coupling ports of the first and second fluid, which can be elongated to accommodate the resistant sealing members discussed above, and the holes for passing the bolt members through them during coupling. of the adapter 310 and the intermediate adapter 320. As discussed herein, the die assembly 100 retained by compression between the first and second end plates 160 and 170 is either directly attached to the adapter 310 or to the intermediate adapter 320 thereby enabling the mount of die assembly 100 in parallel or vertical orientation, or in orientations rotated 90 degrees. FIG. 1 shows the die assembly 100 and die end retainer plates 160 and 170 mounted on the second mount interface 321 of the intermediate adapter 320, but the adapter interfaces 310 of the adapter 310 and the intermediate adapter 320 for this purpose are equally functional. FIG. 4 shows the second end retainer plate of the die 170 having an inlet of the first fluid 176 and an inlet of the second fluid for coupling the inlet of the first and second fluid 112 and 132, 134 of the die assembly 100 with the outlets of the first and the second. second fluid 325 and 327 of the intermediate adapter 320. FIG. 1 shows a latch 190 for securing the die assembly 100 retained between the end plates 160 and 170 of the mounting surface of the adapter 320. The latch 190 includes an elongated head portion 192 with a torsion applied to the engaged surface, portion of the constricted shaft 194, and a portion of the threaded end 196. FIG. 3a shows the first end plate 160 having an opening 166 for free passage of the threaded end portion 196 of the sear 190 through it, and a seat 167 for receiving a sealing member, which is not shown, which forms a fluid seal with a portion of the elongated head 192 of the sear 190 fully advanced through the die assembly 100. The threaded end portion 196 of the sear 190 also freely passes through the inlet of the second fluid 131 of the die assembly 100 of FIG. 2, through the hole 178 in the second end plate 170, and into a threaded gear with a portion 329 of the outlet of the second fluid 327 of the intermediate adapter 320. In accordance with this aspect of the invention, the sear 190 is arranged through and into the outlet of the second fluid 327 of the adapter 320, or of the adapter 310 which is similarly configured, to ensure the assembly of the die 100 retained with compression between the first, and the second end plates 160 and 170, wherein the portion of the constricted shaft 194 of the sear 190 allows the second flow fluid to pass therethrough without obstructions. According to an aspect related to the invention, the hole 178 in the second end plate 170 is screwed in to engage the threaded end portion 196 of the fastener thus preventing separation thereof during the assembly of the die assembly 100 and the end plates 160. and 170. According to another aspect of the invention, the sear 190 extends through the upper portion of the die assembly 100 and the die retaining end plates 160 and 170 to facilitate mounting therefrom on the mount interface. of the adapter 310 or 320. The upper location of the sear 190 allows a gravitational orientation of the die assembly relative to the adapter when mounted to substantially vertically oriented mounting interfaces. The mount interface of the adapter and the second end plate 170 may also have complementary members to positively locate the second end plate 170 of the mount interface. FIGS. 4 and 6b, for example, show for this purpose a protruding member 179 on the second end plate 170 and a complementary recess 323 on the second mounting interface 321 of the intermediate adapter 320. According to even another aspect of the invention shown in FIG. . 1, the die assembly 100 is coupled to a fluid measuring device 210 for supplying the first fluid to the die assembly. The die assembly is coupled to the main manifold 200 having a supply conduit of the first fluid 230 engageable between the fluid measurement device 210 and the die assembly 100 to supply the first fluid thereto. The exemplary embodiment shows, more generally, the arrangements for mounting a plurality of die assemblies 100 coupled to the main manifold 200, wherein the main manifold has a plurality of first fluid supply conduits 230 engageable between the fluid measurement device. 210 and one of the corresponding pluralities of die assemblies 100 for supplying first fluid therefrom. The first fluid supply conduits 230 are coupled to a plurality of fluid outlet ports 232 disposed at a first end portion 202 of the main manifold 200, where the plurality of the die assemblies 100 is coupled to the first end portion 202 of the main manifold 200. In one application, each die assembly 100 and the corresponding adapter 310 and / or 320 is coupled to the main manifold 200 by a nozzle module 240 having an actuator valve to control the supply of the first and second fluids to the die assembly, for example an MR-1300 ™ Nozzle Module, available from ITW Dynatec, Hendersonville, Tenn. In an alternative application, each die assembly 100 and the corresponding adapter 310 and / or 320 is coupled to the main manifold 200 by a common nozzle adapter plate, which supplies the first and second fluids to the plurality of die assemblies. According to this configuration, the modules 240 in FIG. 1 form a common adapter plate. These and other features and aspects of the invention are more fully disclosed in the Application E.U. No. 08 / 683,064, simultaneously pending, filed on July 16, 1996, entitled "Hot Melt Adhesive Applicator with Gear Driven Measuring Head", whose other characteristics are also combinable with the many features and aspects of the present invention. In yet another alternative application, each die assembly 100 and the corresponding adapter 310 and / or 320 is coupled to the main manifold 200 through one of the plurality of control plates of the first individual fluid flow 240, which supplies the first and second fluids to the corresponding die assemblies. And in another embodied alternative, each of the pluralities of the control plates of the first individual fluid flow 240 is also coupled to the main manifold 200 by a common fluid return manifold upon the return of the first fluid to the main manifold. These and other features and aspects of the invention are described more fully in the application E.U. 08 / 734,400, simultaneously pending, filed on October 16, 1996, entitled "Fluid Flow Control Plates for Hot Melt Adhesive Applicator" While the present written description of the invention enables any person skilled in the art of making and using what is considered in the present as the best mode of the invention, it will be appreciated and understood that any person skilled in the art of the existence of variations, combinations, modifications and equivalents within the spirit and scope of the exemplary embodiments described in this document. The present invention, therefore, should be limited not by the exemplary embodiments described herein but by the embodiments within the scope of the appended claims.

Claims (50)

1. CLAIMS 1. A method of meltblowing comprising the following steps: distributing a first fluid from a first orifice to form a first fluid flow at a first velocity; distributing a second fluid flow from two second orifices to form the second fluid flows separated at a second velocity together with substantially opposite lateral flanks of the first fluid flow; convergently directing the second separated fluid flows towards the first fluid flow; and conducting the first fluid flow with the second fluid streams separated at a second velocity greater than the first velocity of the first fluid flow, where the first fluid flow conduit is attenuated to form a first filament of fluid. The method of Claim 1 further comprising steps for controlling a hesitation of the first fluid flow with an angle between at least one separation of the second fluid flows and the first fluid flow. The method of Claim 1 further comprising the steps of depositing the first fluid filament onto a substrate in motion through wavering the first non-parallel fluid filament toward a direction of substrate movement. The method of Claim 1 further comprising the steps of: distributing the first fluid from a plurality of first holes to form a plurality of first fluid flows at a first rate; distributing the second fluid from a plurality of second orifices to form a plurality of second fluid flows at the second velocity, the plurality of the first fluid flows and the plurality of the second fluid flows arranged in a series such that each one of the pluralities of the first fluid flows are flanked on substantially opposite sides by the corresponding second convergently directed fluid flows; conducting the plurality of the first fluid flows with the corresponding second fluid flows convergently directed at a second speed higher than that of the first speed of the plurality of the first fluid flows, where the conduction of the plurality of the first flows of fluid are attenuated to form a plurality of first filaments of fluid. 5. The method of Claim 4 further comprising the steps of divergently directing the plurality of the first fluid flows. The method of Claim 5 further comprising the steps for distributing the first fluid from a plurality of first orifices to equal flow coefficients of the mass, and distributing the second fluid flows convergently directed from a plurality of second orifices to coefficients equal of mass flow. The method of Claim 4 further comprising the steps of directing the plurality of the first fluid flows in parallel. The method of Claim 4 further comprising the steps for depositing the first filaments of fluid on a movable substrate by wavering the plurality of the first filaments of fluid not parallel to a direction of movement of the substrate. The method of Claim 8 further comprising the steps for depositing the first filaments of fluid on a moving substrate by wavering the plurality of first fluid filaments substantially transverse to the direction of movement of the substrate. 10. A meltblowing method comprises the steps for: distributing a first fluid from a plurality of first orifices at an equal mass flow coefficient to form a plurality of the first fluid streams at a first velocity; distributing a second fluid from a plurality of second orifices to form a plurality of second fluid flows at a second rate, the plurality of first fluid flows and the plurality of the second fluid flows arranged in an alternating series such that each one of the pluralities of the first fluid flows are flanked on substantially opposite sides by one of the pluralities of the second fluid flows; driving a plurality of first fluid flows with the plurality of second fluid flows at a rate greater than the first velocity of the plurality of first fluid flows. directing not convergently the plurality of the first fluid streams and the plurality of the second fluid streams, where the plurality of the first fluid streams are attenuated to form a plurality of the first filaments of fluid. 11. The method of Claim 10 further comprising the steps for distributing the second fluid from the plurality of the second orifices to an equal coefficient of the fluid flow of the mass. 12. An apparatus for meltblowing comprises: a first hole in the body member for distributing a first fluid and forming a first fluid flow; two second holes in the body member for distributing a second fluid flow and forming two second fluid flows; the first hole and the second holes arranged in such a way that the first hole is flanked on substantially opposite sides through one of the two second holes, the two second orifices oriented to convergently direct the two second flows of fluid towards the first flow of fluid; and the first orifice and the two second orifices arranged in such a way that the first fluid flow at the first velocity is conductive from the first orifice by the two second flows of fluid at a higher velocity than the first velocity, where the first conduit Fluid flow attenuates the first fluid flow to form a first strand of fluid. The apparatus of Claim 12 further comprising: a plurality of the first holes in the body member for distributing the first fluid and forming a plurality of first fluid flows; a plurality of second holes in the body member for distributing the second fluid and forming a plurality of second fluid flows; The plurality of the first orifices and the plurality of the second orifices arranged in a series such that each of the pluralities of the first orifices are flanked on substantially opposite sides by the corresponding second orifices oriented to convergently direct two second fluid flows to each first fluid flow; and the plurality of the first orifices and the plurality of the second orifices arranged in such a way that the plurality of the first fluid flows and the first velocity are conducted from the plurality of the first orifices through the plurality of the second flows of the first orifices. fluid at a second velocity higher than the first velocity, where the conduction of the plurality of the first fluid streams attenuate the plurality of the first fluid flows to form a plurality of the first filaments of fluid. 14. The apparatus in claim 13, wherein the plurality of the first orifices are oriented to direct the plurality of the first fluid flows in parallel. 15. The apparatus of Claim 13, wherein the plurality of the first orifices are oriented to diverge the plurality of the first fluid flows. 16. The apparatus of Claim 13, wherein the plurality of the first orifices have equal first fluid flow paths and the plurality of the second orifices have equal paths of the second fluid flow. The apparatus in Claim 13, wherein the body member is a die assembly that is composed of: a first plate forming a first restrictive cavity in the body member, the first restrictive cavity having a first restrictive cavity inlet and a first restrictive cavity outlet; a second plate forming a first accumulator cavity in the body member, the first accumulator cavity having a first accumulator cavity inlet coupled to the first restrictive cavity outlet and the first accumulator cavity having a first accumulator cavity outlet coupled to the plurality of accumulator cavities. the first holes. wherein the first fluid supplied to the entrance of the first restrictive cavity is substantially evenly distributed to the plurality of the first orifices to form the plurality of the first fluid flows. 18. The apparatus in Claim 17, wherein the body member is further composed of a third plate between the first plate and the second plate, the third plate having a plurality of first passages coupling the first restrictive cavity and the first accumulating cavity, where the plurality of the passages in the third plate is dimensioned to substantially uniformly distribute the first fluid supplied from the first restrictive cavity towards the plurality of the first holes. 19. The apparatus of Claim 17, wherein the body member is further comprised of: a fourth plate forming a second restrictive cavity in the body member, the second restrictive cavity having a second entrance of the restrictive cavity and a second outlet of restrictive cavity; a fifth plate forming a second accumulating cavity in the body member, the second accumulating cavity having a second inlet of the accumulating cavity coupled to the second outlet of the restrictive cavity, and the second accumulating cavity having a second outlet of the accumulating cavity coupled to the plurality of the second orifices, wherein the second fluid supplied to the second outlet of the restrictive cavity is substantially evenly distributed to the plurality of the second orifices to form the plurality of the second fluid flows. The apparatus of Claim 19, wherein the body member is further comprised of a sixth plate between the fourth and fifth plate, the sixth plate having a plurality of the second passages coupled to the second restrictive cavity and the second cavity. accumulator, wherein the plurality of the passages in the sixth plate substantially uniformly distribute the second fluid supplied from the second restrictive cavity to the plurality of the second orifices. The apparatus of Claim 19, wherein the body member further comprises a seventh plate having a first plurality of slots and a second plurality of slots, the first plurality of slots forming the first plurality of holes coupled to the first accumulator cavity and the second plurality of slots forming the second plurality of holes coupled to the second accumulator cavity. 22. The apparatus of Claim 21, wherein the plurality of the first slots forming the plurality of the first orifices having equal paths in the first fluid flow. 23. The apparatus of Claim 21, wherein the plurality of the second slots forming the plurality of the second orifices having equal paths of the second fluid flow. 24. The apparatus of Claim 22, wherein the plurality of the first orifices are oriented to direct the plurality of the first fluid flows in parallel. The apparatus of Claim 22, wherein the plurality of the first orifices is oriented to diverge the plurality of the first fluid flows. 26. An apparatus for meltblowing is comprised of: a first hole in a die assembly of at least two parallel plates for distributing a first fluid and forming a first fluid flow; two second holes in the die assembly for distributing a second fluid and forming two second fluid flows; the first hole and the two second holes arranged in such a way that the first hole is flanked on substantially opposite sides by one or two second holes; and the first hole and the two second orifices arranged in such a way that the first fluid flow at a first velocity is conducted from the first orifice by the two second flows of fluid at a second velocity higher than the first velocity, where the conduit first fluid flow attenuates the first fluid flow to form a first fluid filament; and the first and second end plates of opposing die retention to hold the die assembly between them by compression. 27. The meltblown apparatus of Claim 26, which is also comprised of a rivet member disposed through an aperture through the die assembly to retain the plurality or parallel plates in parallel relation. 28. The apparatus of Claim 41 further comprising an adapter having a first saddle interface for men- tioning the die assembly held by compression between the two opposing end plates retaining the die. The apparatus of Claim 28, wherein the first mount interface of the adapter having a first fluid outlet and a second fluid outlet, and the second end plate retaining the die having a first fluid inlet and a second fluid inlet, wherein the second end plate retaining the die is mountable on the first mount interface of the adapter for coupling the first and second fluid outlets of the adapter to the first and second fluid inlets of the second end plate by retaining the die. 30. The apparatus of Claim 29 further comprising a sear, the first end plate retaining the die having a detent opening, the sear is extendable through the opening of the sear of the first end plate by holding the die, through the die assembly, through the second fluid inlet of the second plate holding the die, and within the second fluid outlet of the adapter's saddle interface to ensure the assembly of the die held by compression between the first and second end plates retaining the die to the adapter's mount interface. 31. The apparatus of Claim 30, wherein the opening of the latch located toward an upper end of the first end plate retaining the die and the second end plate by holding the die having a locating member engageable with a complementary member in the saddle interface. of the adapter to align the second end plate by holding the die in the adapter's mounting interface. 32. The apparatus of Claim 41 further comprising an adapter having a first mount surface with a first central fluid outlet and a second fluid exit, and an intermediate adapter having a first mount surface with a first fluid inlet and a second annular fluid inlet; The first mount interface of the intermediate adapter mountable on the first adapter mount interface for coupling the first and second fluid outlets to the intermediate adapter of the first and second fluid outlets of the adapter, where the second annular fluid inlet allows a rotary position of the intermediate adapter in relation to the adapter; the intermediate adapter having a second frame interface with a first fluid outlet a second fluid outlet, and the second end plate retaining the die having a first fluid inlet and a second fluid inlet; the second - plate retaining the mountable die in the second interface of the intermediate adapter for coupling the first and second fluid outlets of the intermediate adapter to the first and second fluid outlets of the die assembly. 33. A meltblown system comprising: a die assembly including a plurality of at least two parallel plates, the die assembly having a first hole for distributing a first fluid and forming a first fluid flow, and two second orifices for distributing a second fluid and forming two second fluid flows, the first orifice and the two second orifices arranged such that the first orifice is flanked on substantially opposite sides by one of the two second orifices, and the first orifice and the two second orifices arranged in such a way that the first fluid flow at a first velocity is conductive from the first orifice by the two second flows of fluid at a second velocity higher than the first velocity, where the conduit of the first fluid flow attenuates the first fluid flow to form a first fluid filament; and a fluid measuring device coupled to the die assembly for supplying the first fluid thereto. 34. The system of Claim 33 further comprising a main manifold having a first fluid supply conduit between the fluid measuring device and the die assembly for supplying the first fluid thereto. 35. The system of Claim 34 further comprising a plurality of die assemblies coupled to the main manifold, the main manifold having a plurality of first fluid supply conduits between the fluid metering device and a corresponding one of the plurality of the die assemblies to supply first fluid to it. 36. The system of Claim 35, wherein the main manifold having an end portion with a plurality of fluid outlet ports, each fluid outlet port coupled to a corresponding one of the first fluid supply conduits, wherein the plurality of the die assemblies are coupled to the first end portion of the main manifold. 37. The system of Claim 35 further comprising a plurality of nozzle modules, each of the plurality of die assemblies coupled to the main manifold by one of the corresponding pluralities of the nozzle modules, each of the nozzle modules supplying the first and second fluids to the corresponding die assembly. 38. The system of Claim 35 further comprising a common nozzle adapter plate for interconnecting each of the pluralities of die assemblies to the main manifold, the adapter plate of the common nozzle supplies the first and second fluids to each of the pluralities of die assemblies. 39. Claim system 35 further comprising a plurality of control plates of the first individual fluid flow, each of the pluralities of the control plates of the first individual fluid flow coupling one of the corresponding pluralities of the assemblies. of dice to the main multiple. 40. The Claim system 39 which is further comprised of a common fluid return manifold, each of the pluralities of the control plates of the first fluid flow coupled to the main manifold by the common fluid return manifold for return from the first fluid to the main manifold. 41. A meltblowing apparatus is comprised of: a plurality of first holes in the body member for distributing a first fluid and forming a plurality of first fluid flows; a plurality of second holes in the body member for distributing a second fluid and forming a plurality of second fluid flows; the plurality of the first holes and the plurality of the second holes arranged in a series such that each of the pluralities of the first holes are flanked on substantially opposite sides by the corresponding corresponding holes, the plurality of the first holes having a protuberance relative to the plurality of the second holes, and at least some first holes adjacent to the series separated into at least two second adjacent holes of the series. 42. The melt blowing apparatus of the Claim 41, in which the body member is a die assembly comprising a plurality of at least two parallel plates, the plurality of the first holes and the plurality of the second holes formed in at least one of the two parallel plates of the die assembly. 43. The method of Claim 1 further comprising the steps for distributing the first fluid from a first protruding hole relative to the second holes associated with the first orifice. 44. The method of Claim 43 further comprising the steps for distributing the second fluid from the second recessed holes in corresponding openings relative to the first orifice. 45. The method of Claim 4 further comprising the steps for distributing the first fluid from a plurality of first protruding holes relative to the plurality of second orifices. 46. The method of Claim 45 further comprising the steps for distributing the second fluid from a plurality of second recessed holes in the corresponding openings relative to the plurality of first orifices. 47. The apparatus of Claim 12, wherein the second holes disposed in a corresponding opening of the body member for lowering the second holes in the body member relative to the first orifice. 48. The apparatus of Claim 13, wherein the plurality of second holes disposed in corresponding openings of the body member for lowering the second holes in the body member relative to the first orifice. 49. The apparatus of Claim 42, wherein each plate has a thickness no greater than about 0.076 centimeters. 50. The apparatus of Claim 42, wherein each plate has a thickness between about 0.012 centimeters and about 0.063 centimeters. EXTRACT OF THE INVENTION The invention relates generally to meltblown methods and systems and more particularly to the meltblown die assemblies of parallel plate and meltblown system configurations used to precisely control the uniform distribution and application of meltblown adhesive filaments on moving substrates.