FI68215B - GLASFIBERKROPPAR SOM AER ANVAENDBARA FOER INBLAOSNING I HAOLIGHETER SOM ISOLERMATERIAL - Google Patents

Description

f ~. ,,. 171 r „_„ ANNOUNCEMENT, _ Λ _ 8 (11) UTLÄGGNINGSSKRIFT 6821 5 -¾¾¾ C (45) Patent granted 12 00 1985

JgJrJ Patent applications (51) Kv.lk.4 / lnt.CI.4 ς 03 B 37/16 FINLAND —FINLAND (21) Patent application - Patentansökning 792 ^ 27 (22) Application date - Ansökningsdag 03.08.79 (Fl) (23) Start date - Giltighetsdag 03.08.79 (41) Has become public - Blivit offentlig 05.02.80

National Board of Patents and Registration Date of publication and publication - iQ q /. gr

Patent- and Register-Register ^ 'Ansökan utlagd och utl.skriften publlcerad ^' 3 (32) (33) (31) Privilege claimed - Begärd priority Qi * _ 08 _ 78 USA (US) 9309 ^ 6 Verified-Styrkt (71) 0wens -Corning Fiberglas Corporation, Fiberglas Tower, Toledo,

Ohio ^ 3659, USA (72) Richard Staples Bemis, Granville, Ohio, Daniel Alan McCartan, Heath,

This invention relates to glass fiber bodies which can be disintegrated into small pieces of fiberglass sheets. This invention relates to glass fiber bodies which can be disintegrated into small pieces of fiberglass sheets which are suitable for blowing into cavities as an insulating material and a method of making the same. or in fragments and suitable for blowing into the cavities as an insulating material and consisting of columns of binder-coated glass fibers oriented substantially perpendicular to the longitudinal direction of the columns.

The invention also relates to a method of making glass bodies, wherein the binder-coated glass fibers are formed into an elongate glass fiber mat which is cut longitudinally to form strips cut transversely, the longitudinal cuts and transverse cuts being spaced apart whose length is equal to the thickness of the mat and in which the fibers are oriented substantially transversely to the longitudinal direction of the columns.

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The fiberglass bodies according to the invention are mainly characterized in that the columns formed from them have a diamond or triangular cross-section and the method according to the invention is mainly characterized in that the cross-section is performed so that the columns formed of fiberglass bodies have a diamond or triangular cross-section.

For several years, a commercial method of making inflatable wool insulation has involved the use of a hammer mill in which rotating hammers in the sheath break the fiberglass pulp and force it through a plate with multiple openings so that wool forms irregularly shaped spheres.

A non-commercial process for making inflatable wool balls is disclosed in U.S. Patent 2,219,285. In this patent, glass fiber wool pulps are broken up and the fibers are reconstituted into a flat mat which is sprayed with water and cut into strips and chopped into cubes. The cubes are passed through troughs where they are broken by rotating impact blades and rotated into spheres.

According to the present invention, pillars are made of inflatable fiberglass wool, and these are bagged without mixing or spinning into spheres. The columns break randomly during the bagging step and when blown into place for insulation into approximate cubes or smaller scales of different thicknesses. The weight of the scales may be less than the weight of the broken balls in the hammer mill required for the same insulation value.

It is an object of the invention to provide an improved inflatable wool insulation, an improved method of manufacturing inflatable wool insulation, and a method of achieving the same insulation value with a lower weight of inflatable fiberglass wool.

Other objects and advantages will become apparent upon consideration of the following description taken in conjunction with the accompanying drawings, in which Fig. 1 is a perspective view of a blow wool pillar made in accordance with the invention; Fig. 2 is a perspective view of approximate cubes or smaller scales as randomly broken during processing; Fig. 4 is a plan view of the column of Fig. 1, Fig. 5 is a plan view of an alternative shaped column having a triangular cross-section, Fig. 6 is a schematic side view of a device used to manufacture an inflatable wool insulation according to the invention, Fig. 7 is a partial end view, is taken mainly in the direction of arrows 7-7 in Figure 6, Figure 8 is a partial enlarged perspective view of the splitting and cutting portion of the device of Figure 6, Figure 9 is a partial enlarged side view of the splitting and cutting portion of the device of Figure 6; of the cutting section, Fig. 10 is a partial sectional view taken substantially along line 10-10 of Fig. 9, Fig. 11 is a partial end view of the apparatus of Fig. 9, and Fig. 12 is an enlarged cross-sectional view of one of the cutting rollers of Fig. 6.

Figure 1 of the drawings shows a blown glass fiber insulation column 20 made in accordance with the invention by cutting and cutting a glass fiber mat. Figure 4 is a plan view of the pillar 20. Figure 2 shows the pillar disassembled into a representative approximate cube 20a and representative smaller scales 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i and 20j. Pillar 20 roughly decomposes into flanges of different thicknesses during handling and bagging, as well as into the attic space when blown for insulation. As an example, the column can be about 9-13 cm high and the distance between the opposite sides in plan view can be about 1.3 mm. It is to be understood that other dimensions and shapes may be used without departing from the spirit and scope of the invention. Figure 3 shows an alternative diamond-shaped pillar 22 which can be manufactured with the device according to the invention, and Figure 6 shows an alternatively shaped, triangular pillar 24.

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Figure 6 shows a device with which the blown wool pillars 22 are manufactured. The molten glass streams 28 are fed from the pre-furnace 30a of the furnace 30b to conventional rotary fiberizers 32 which form glass fiber gauze 34 which are assembled on a conveyor to form a glass fiber mat 38. The binder is sprayed onto the glass fibers of the gauze 34 by means not shown. Typically, the spray nozzles are mounted on the outer sheaths of the rotating fiberizers 32. The mat 38 is conveyed by a conveyor 39 through a curing oven 40 where the binder cures and binds the fibers together. The rotary saw 42 at the rear of the furnace 40 splits the mat 38 into two portions 38a and 38b, as best shown in Figure 8, and the wedge 44 moves the portions 38a and 38b apart before feeding them to the two press rollers 46 and 47. The mat portion 38a is then fed to the encapsulated splitting - and the cutting mechanism 50, and at the same time the mat part 38b is fed to an identical splitting and cutting mechanism 51 (Fig. 7). In the mechanisms 50 and 51, the mat portions are split lengthwise and cut into columns such as column 22. For example, the columns may be fed to a conventional hopper 52a which is part of a conventional bagging machine 52. The spraying machine 52 has two tubes 52b and 52c having a common joint portion 52d connected to the hopper 52a. The joint portion 52d has a pivotable guide plate 52a that selectively closes the second tube 52b or 52c and guides the pillars 22 from the hopper 52a to the second tube. Each tube is connected to a bagging chamber, such as a chamber 52f, with a piston 52g which compresses the pillars 22 into the bag 54.

The mechanism 50 is best shown in Figures 9-11, and the mechanism 51 is identical. The mechanism 50 includes a splitting roller 56 with a support roller 58 and a rotary cutter or cutting roller 60 with a support roller 62, each roller having a suitable shaft and bearings. The motor 64 with the sprocket 66 drives the splitting roller 56 and the cutting roller 60 by means of a chain 68 and sprockets 72 and 74 operatively connected to the rollers.

Roller 56 has a plurality of splitting cone-shaped splitting discs. The roller 60 resembles a twin helical or bevel gear with cutting edges, as best shown in Figure 12. For example, the pillars of Figures 1 and 4 could be cut with cutting edges parallel to the axis of the roller, but it is obvious that

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6821 5 5 The canine pattern intersecting the diamond-shaped pillars of Figure 3 extends the life of the cutting edges. In actual use, there is little clearance between the splitting roller 56 and its support roller 58 and likewise between the cutting roller 60 and its support roller 62. The mat portions 38a and 38b are compressed during splitting and cutting, but columns such as column 22 expand upon release substantially back to the original thickness of the mat.

In an experiment carried out to demonstrate the improvement provided by the invention, a standard blown wool chopped in a hammer mill was compared to a blown wool according to the invention. The blown wool treated in the hammer mill had a blown density (d) of 3.74 kg / m and a conductivity (K) of 0.0665 W / m.K. at this density, while wool scales or prisms had a blown density of 3 7.614 kg / m and a conductivity of 0.0763 W / m.K.

The amount of insulation required per thermal resistor unit is directly proportional to the thermal conductivity and density. Using the above figures, you only need to use scales or prisms for the same insulation value 82% of the weight of the hammer blower wool / To, 0763 x 7.614) / (0.0665 x 10.74) = 0.8 ^ 7 · This represents a 19% saving of the same insulation value in the weight of the glass wool required for

The base wool, e.g., mat 38 wool from which hammer mill blowing wool and scaly blowing wool were prepared for the above 3 experiments, had a density of 9.84 kg / m 2, a binder content of 4.5%, and a fiber diameter of 0.007 mm.

Claims (3)

6 6821 5 1. Glass fiber pieces which can be broken up into small sheets or fragments and are suitable for blowing into cavities as an insulating material and which consist of columns of binder-coated glass fibers with fibers oriented substantially perpendicular to the longitudinal direction of the columns in its transverse direction at several points along its length, characterized in that the pillars have a diamond or triangular cross-section. A method of making fiberglass bodies, the method comprising forming a binder-coated glass fiber into an elongate fiberglass mat which is cut longitudinally to form strips cut transversely, the longitudinal cuts and the transverse cuts being spaced apart by a distance that is multiple length is equal to the thickness of the mat and in which the fibers are oriented substantially transversely to the longitudinal direction of the columns, characterized in that the transverse section is performed in such a way that the formed columns have a diamond or triangular cross-section. Method according to Claim 2, characterized in that the method is continuous.