DE2727215A1 - DEVICE FOR MOLDING ARTICLES FROM FIBER MATERIAL - Google Patents

Description

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The invention relates to an apparatus for shaping articles from strips made of fiber material Felts, e.g. made of glass fiber insulating wool, which is a hardenable Connection material, for example an uncured, thermosetting connection material contain.

An important application of the present invention is in the manufacture of longitudinally slotted cylindrical thermal insulation covers for hot and cold tubes, the covers commonly referred to as "one-piece tube insulator sections" are designated and have notches so that they open sufficiently wide when pushed over a pipe, whereupon they snap back into a closed state around the tube when released.

However, the invention is not limited to the manufacture of one-piece Pipe insulation sections and can be advantageous in the manufacture of other articles, e.g. rectangular, segment-shaped, curved or irregular cross-section made of felts made of fiber material.

In U.S. Patent 3,912,572 an apparatus and method is disclosed described using stationary mold surfaces between which a felt is drawn to change its cross-sectional shape to change, after which the felt is cured by passing through hot gas. The mold surfaces are on cylindrical arranged inner and outer shapes and the outer shape is made in one piece and has openings for the passage of the hot gas through the mold to the felt and away from the felt. This known device can be used to produce various Products of various sizes can be adapted by replacing the inner and / or the outer shape. With this well-known The hot gas is sent inward through the mold once and then vented outward through the mold To effect hardening of the felt.

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It has subsequently been found that a more effective hardening of the felt by the hot gas is necessary to ensure sufficient hardening of the felt even if the advancing speed of the felt can be increased considerably by the shapes and size of the final product. Even so, it is important that the molds are simply replaced to accommodate the manufacturing facility to accommodate different product sizes can in order to economically exploit the relatively expensive production facility.

It is accordingly an object of the present invention to provide an apparatus for producing articles from a band-shaped, to create made of fiber material felt that allows both an improved curing of the felt as well the exchange of the mold used to shape the felt is permitted.

According to the invention a device for forming articles from longitudinally advancing strip-shaped. Felt off Provided fiber material that contains a hardenable bonding material which contains a stationary shape that is associated with the Felt maintains sliding contact in its longitudinal direction as the felt advances along the mold, the mold being a Having a plurality of separable mold sections and means for maintaining the mold sections in mutual longitudinal alignment along the advancement path of the felt and wherein the fasteners are easily releasable for removal and to allow replacement of the mold sections.

By using a variety of separable mold sections the shape can be made considerably longer than previously possible, thus creating a longer stretch of shape through which the hot gas can pass and consequently the hardening of the felt is improved. There the mold sections are easily separable, the mold can be disassembled into easily manageable parts, resulting in the

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Allows mounting of the mold in the device and removal and replacement of the mold.

In addition, the increased length of the mold also makes it possible to reduce the number of 'passages' of the hot gas through to increase the felt.

Preferably the apparatus comprises a plurality of chambers each extending around the mold and the are arranged successively along the mold, it includes a hot gas inlet passage for hot gas to one of the To deliver chambers and from there to send it through the openings in the form and in the felt, and embraces them a hot gas discharge passage communicating with another chamber for discharging the hot gas therefrom; the chambers are separated from one another by partial walls that contain openings through which the Extends shape, the shape having a smaller cross section than the openings and the holding devices include easily removable closure means which extend around the outer mold and close the openings.

The chambers can communicate with one another through valves that are used to influence the flow of the hot water Gas can be adjusted through the chambers.

The invention is illustrated below with reference to the drawing, for example explained in more detail. In the drawing shows:

1 shows a side view of a device for the production of pipe insulation sections existing from one piece,

FIG. 2 shows a vertical longitudinal section through the mold section of the device according to FIG. 1,

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FIG. 3 shows a partially cut-open perspective illustration of the mold section according to FIG. 2 enclosing housing and a structure consisting of burner, pump and lines for the delivery of hot gas to the housing and for withdrawing hot gas from the same,

Fig. 4 shows a horizontal longitudinal section through the housing Fig. 3,

5 shows a section along the line with parts omitted V-V of Fig. 6 by one of a plurality of shutter plates and a. Associated quick release fastening device j with which the outer shape is supported in the housing according to FIGS. 2 to 4, and

FIG. 6 is a view in the direction of arrow A in FIG. 5.

The device shown in the drawing is primarily for the continuous production of in the longitudinal direction divided cylindrical one-piece pipe insulation sections made of uncured mineral wool felt, which is a hardenable Contains connecting material in the form of, for example, uncured resin. However, this device can be simple be adapted to form articles with different cross-sections from the same material.

1 shows a schematic side view of a production plant in which a supply roll 210 made of uncured strip-shaped Material wool felt 211 is used, which is a hardenable bonding material in the form of a non-hardened Contains resin. The felt 211 is present in the roll 210 cut to the required width and is provided with a stretchable reinforcement, for example with a padding .

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An auxiliary supply roller 210A is provided to supply felt 211, when the supply roll 210 runs out and an automatic splitting device 212 is provided in order to joining the ends of successive sections of felt, those of the supply roll 210 and the auxiliary supply roll 210A are coming.

A conveying mechanism 213 conveys the felt 211 from the supply roll 210 and the auxiliary supply roll 210A to a further conveying ^{device 21 1} IjVOn which enters from the felt 211 into a forming section 215, which will be described in detail later.

Before the felt 211 enters the mold section 215, runs it passes underneath a felt hold-down roller 216 which feeds the felt 211 properly into the forming section 215.

In the forming section 215, the felt 211 is reshaped in such a way that the required cross-section for the product is obtained and it is hardened.

The hardened felt is from the other side of the mold section 215 pulled off by a gripping and pulling mechanism 217, which is in the form of two driven endless belts 218 is present, the opposite sides of the cured felt 211 grip.

After the gripping and pulling mechanism 217, the cured felt 211 passes through a longitudinal slitting machine 220, which is required to make a longitudinal slot on one side of the cured felt.

A covering material 221, for example an aluminum foil, is supplied from a covering material supply roll 222 fed and then wrapped around the cured felt 211,

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after which the cured and wrapped felt is cut into sections by a reciprocating cross cutter 223 cut to the required length} these are boxed in an automatic packaging machine 224 packed up.

The mold section 250 will now be explained in detail with reference to FIGS.

At the inlet end of the mold section 215, an insertion cone 228 is provided to allow the cross-sectional shape of the felt 211, which is flat in shape prior to the entry of the felt 211 into the inlet cone 228, to be reshaped into an annular cross-section, wherein the incoming felt is passed around an inner mold surface which is on the outside of a cylindrical inner mold or a mandrel 229 is present.

The inner mold 229 extends into the inlet end of the cylindrical outer mold 230 and faces in the radial direction a distance inward from this.

The outer shape 230 is made up of six cylindrical outer shape sections 231A to 231E inclusive, which lie end to end with one another, with their end portions telescoping into one another attacking are attached.

The outer shape sections 231B to 231E inclusive are provided with openings 232 to allow hot gas to pass through by the same as will be described in detail later.

The outer shape 230 extends through a housing 23 **, the serves to direct the flow of hot gas to and from the outer mold 230.

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As shown in Fig. 2, the housing 234 is opposed lying end walls 235 and 236, a top wall 237 and a bottom 238. A plurality of transversely extending ones vertical part walls or sheet pile walls 2 * 10 are arranged at intervals in the longitudinal direction of the housing 234 and extend across it. A longitudinal partition made up of a plurality of horizontal transverse partition walls 241 to 245 extends between end walls 235 and 236 and the vertical transverse part walls 240 and serves to the upper portion of the interior of the housing 234 from its separate lower section. Each vertical sub-wall 240 has an opening 240A within the top portion the interior of the housing to allow a gas flow in the longitudinal direction of the upper section.

Each horizontal transverse part wall 241 up to and including 245 is provided with a gas flow opening 247, which by means of a valve 248 can be closed.

Each valve 248 has a threaded shaft 249 on, which is attached to a top wall 237 of the housing Sleeve is screwed, wherein the upper end of the shaft 249 has a head 251 with a square cross-section, on which a rotary wrench (not shown) can attack. After the shaft 249 has been rotated by means of this rotary wrench, a valve plate 252 at the lower end of the valve 248 can be raised or lowered to close or open the respective gas flow opening 247.

The lower portion of the housing 234 is through the vertical part walls 240 and the releasable locking plates 258 bis including 263, which will be described in detail later, are divided into a plurality of molding chambers 252-256. in the In the lower section, the housing 234 has an extension with a cover part 267 and a rear wall 268.

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As can be seen from the plan view of the housing 23 ¹ I in Fig. ¹ I, are omitted in the parts in cross section to the interior of the rear continuation 269 and parts of the mold chambers 252 to show up to and including 256, a vertical part walls extending 2 ¹ IO, which is the first of the vertical part walls 2 ¹ IO in the advancing direction of the felt 211, rearwardly over the interior of the rear extension 269, around this into a gas inlet housing section or chamber 269A and a gas outlet housing section or chamber 269B, while the remaining vertical part walls 2 ¹ IO are provided with square openings 2 ¹ IOB and the molding chambers 254 and 256 are in communication with the gas outlet chamber 269B through openings 266A and 266B in the rear wall 266, so that the hot gas from the Mold chambers 25 ¹ I and 256 to the gas outlet chamber 269B can escape. The gas inlet chamber 269A communicates with the molding chamber 252 via an opening 266c in the rear wall 266.

A hot gas supply line 270 communicates with the gas inlet chamber 269A, and a hot gas return line 271 is connected in communication with the gas outlet chamber 269B.

The hot gas supply line 270 comes from a burner housing 272 (FIG. 3) which is equipped with a gas burner 273 is.

^{A gas pump 27 1} I driven by an electric motor 275 is connected to the burner housing 272.

A by-pass line 2 27 connected to the air supply line 270 extends to the inlet of the air pump 27 ¹ I and the hot gas return line 271 is connected to the by-pass line 2 27.

An exhaust stack extends upward from the burner housing 272.

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The hot gas supply line 270 is provided with an inlet valve 280 for influencing the flow of hot gas into the housing 23 * 1 and the hot gas return line 271 is provided with an exit valve 281 to affect the discharge of hot gas from the housing 234.

A by-pass valve 282 is in the by-pass line 227 provided to influence the flow of hot gas from the hot gas supply line 270 to the gas pump 274, and the exhaust chimney 278 is provided with a slide 283.

A compressed air inlet tube 285 has a downwardly extending one convoluted portion 286 connected to a torch 287 and through a flexible hose 288 and an inlet tube 289 communicates with the interior of the inner mold or dome 229 (Pig x 2) which has hot gas outlet ports 290 is provided.

The manner in which successive portions of the outer mold are joined together and in the housing will now be described 5, the connection of the ends of the outer mold portions 231B and 231C shows.

The male mold portion 231B is provided with an end socket 291 welded thereto, and the male mold portion 23IC is provided with an end sleeve 292 welded thereto. Another end socket 293 welded around the end socket 292 telescopically takes up the end sleeve 291 on.

The vertical transverse part wall 240, which can be partially seen in FIG. 5, separates the successive chambers 253 and 253 (Fig. 2) of the housing 234 from each other and is connected to a Opening 295 provided, which has a considerably larger cross section than the outer shape 230, so that an exchange

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of external shapes with different cross-sectional sizes and shapes is possible. The opening 295 is in each case through a closure plate 26Ο closed, which extends around the outer shape 230. A similar opening 295 is in each other vertical part wall 240 and in the end walls 235 and 236 provided.

An annular support member 296 is on the vertical cross member wall 2 ^ 0 fastened with bolts 297 and a form clamping ring 299, which is provided with handles 300, secures the locking plate 26Ο releasable in the position shown in FIG.

The form clamping ring 299 is held in its position by means of two clamping ring holders 304 while it is against the closure part 296 remains rotatable. Bushings screwed into (not shown) attached to the vertical crosspiece wall 240 Bolts 305 are used to fasten the clamping ring holders 304.

In order to accommodate the outer shape 230, the cover plate 260 is provided with a circular opening, the shape of which is in the manner of a Knife edge 26OA is designed that slidably engages a protruding portion 307 of the end sleeve 293 so that the Expansion and contraction of the portions of the outer mold 230 is compensated for when they are heated and cooled, respectively.

Mold retaining rings 308 extend around the inside edge of the closure plate 260 and are attached to it by means of bolts 309 and nuts 310, the form retaining rings 308 extend inwardly on opposite sides of the raised portion 307 of the end sleeve to lock it in place keep.

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The rotatable mold clamping ring 299 fixes the closure plate 260 and thus the outer mold 230 releasably in it Position in the opening 295 · For this purpose, the mold clamping ring 299 is shaped so that it has a circular inner circumference which is interrupted by diametrically opposed flat portions 311, and the Closure plate 260 has a circular outer circumference, which is diametrically opposed by corresponding flat sections 312 is interrupted. The inner circumference of the mold clamping ring 299 and the outer circumference of the closure plate 260 are dimensioned so that P the closure plate 260 through the mold clamping ring 299 in a parallel to the axis of the outer mold 230 can be pushed through in the lying direction to enable that the closure plate 260 can be moved into or out of the position of FIG. 5, if the mold clamping ring 299 is rotated to a non-clamping position.

Rotation of the mold clamping rings 299 is achieved by inserting an appropriate tool (not shown) into the Handles 300 causes the fully extended in the clamped position and are shown in phantom in the non-clamping position in FIG.

In the non-clamping position, the mold clamping rings 299 extend the flat portions 311 of the mold clamping ring parallel to the flat portions 312 of the closure plate 260 and therefore the closure plate 260 can be pushed out past the flat spots 311.

When the mold clamping ring is rotated to its clamping position, the flat portions 311 and 312 are no longer parallel to each other and the flat portions 311 of the mold clamping ring 299 overlie the circular portion of the Outer circumference of the closure plate 260 and thus prevent the closure plate from being pushed through the clamping ring 299 will. In this way, the closure plate 260 is held in the position shown in FIG.

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The mode of operation of the mold section 215 described above is as follows:

As the felt 211 envelops the inner shape 229 and advances past the inner shape 229 and along the outer shape 230, the inner surface of the felt is at least partially cured by hot air supplied from the compressed air source (not shown) through tubes 285, 288 and 289 and heated by burner 287, this air from the hot air outlet openings 290 of the inner mold 229 exits. The felt 211 is also by conduction of the outer surface of the inner mold 229 is heated by electrical heating elements arranged inside the inner mold 229 314 is generated.

That introduced into the chamber 252 through the hot gas supply line 270 Hot gas circulates around the outer mold portions 231A and 23IB and passes through the overlying hot gas flow port 247 and the upper portion of the housing 234 through, as indicated by arrows A, into the molding chambers 253 and 255.

In the chambers 253 and 255, this hot gas flows through the openings 232 in the outer mold sections 231B and 231D inside and penetrates the thickness of the felt, which now has a cylindrical shape. This hot gas occurs then further along the inside of the felt and goes out again through the outer mold sections 23IC and 23IE, thence to the gas outlet chamber 269B (Fig. 4) and into the hot gas return line 271 to begin a new cycle.

As can be seen, the valves 248 can be opened or closed to increase the rate of passage of the hot gas To change chambers 252 and 256, as may be necessary to produce optimal curing of the felt.

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The flow rate of the hot gas to the housing 23 ¹ I toward and away from being influenced by the valves 280-282 and excess hot gas is discharged through the chimney 278 under the control of the slide 283rd

When it is necessary to replace the inner and outer molds, the cover plates or doors 315 (Figs taken · ¹ O of the (not) access holes shown on the front wall 265 of the housing 23 ** so that in the interior of the housing 234 There is access.

The locking plates 258 to 263 are then removed in sequence by first the handles 300 and thus the Mold locking rings 30I are rotated until the locking plates are resolved. The outer mold portions 231A to 231E can then be sequentially separated from each other and out of the housing 23 ^ removed together with the locking plates 258 and 263 will.

The outer shape can then be replaced by another outer shape (not shown) with, for example, a larger cross section be replaced.

There is an apparatus for forming articles such as one-piece pipe insulator sections from a lengthwise direction advancing band-shaped felt made of fiber material with hardenable connecting material described, which a Has shape intended for sliding contact with the felt in the longitudinal direction of the felt, while the felt longitudinally the form precedes. To enable replacement of the mold, it comprises a plurality of separable mold sections, which are detachably fastened in a simple manner in mutual longitudinal alignment in the longitudinal direction of the felt feed.

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Empty sack

Claims (9)

PATENT LAWYERS 2/2/215 MANITZ, FINSTERWALD & CRÄMKOW Fiberglas Canada Ltd. St. Clair Avenue Munich, June 16, 1997 West Toronto, Ontario 'S / 3 / en - P 2042 CANADA Apparatus for forming articles from fiber material Claims 1 1.) Apparatus for forming articles from a longitudinally advancing strip-shaped felt of fiber material containing hardenable bonding material, with a stationary mold in sliding contact with the felt in the longitudinal direction of the felt during the advancement of the felt along the mold, characterized in that the mold (230) comprises a plurality of separable mold sections (23IA-23IE) mounted in mutual longitudinal alignment along the advance path of the felt, the mold sections (231A-231E) being easily removable for removal and replacement of the mold sections enable. 2. Apparatus according to claim 1, characterized that the mold (230) is provided with openings (232) for hot gases, that the device has a variety of Having chambers (252-256) each extending around the mold and sequentially arranged along the mold that a hot gas inlet passage (270) is provided, 809828/0482 D *. C. MANITZ · D1M ..- ING. M. FINSTERWALD DIPL. -INC. W. CRAMKOW ZENTRALKASSE BAYER. FOLK BANKS β MÖNCHEN 33. ROBERT-KOCH-STRASSE I 7 STUTTGART 50 IBAD CANNSTATT) MÖNCHEN. ACCOUNT NUMBER 7370 TiL. 1089) 23 42 II. TELEX OS - 29672 PATMF SEELBERCSTR. 33/35, TEf. 10711) 56 72 61 POSTSCHECK ι MÖNCHEN 77062-805 ^ ^y ORIGINAL INSPECTED to supply hot gas to one of the chambers, which is released from there is passed through the openings (232) in the felt and that a hot gas outlet passage (271) with another chamber communicates in order to discharge the hot gas from there. 3. Apparatus according to claim 2, characterized in that the chambers ^{are separated from one another by partial chamber walls (2 1} JO), that the partial walls are provided with openings (295) through which the mold (230) extends, that the mold (230 ) has a cross section which is smaller than the cross section of the openings (295), and that the openings are closed by easily removable closing devices (260) extending around the mold (230). 4. Apparatus according to claim 3 »characterized in that that a housing (234) with a longitudinal direction extending partial wall (241-245) is provided, which extends along the housing and transversely to its interior extends that the chamber part walls (240) transversely to the housing (234) and around the mold on one side of the longitudinal part wall extend and that the chambers communicate with one another on the opposite side of the longitudinal part wall stand. 5. Apparatus according to claim 3 or 4, characterized in that the closure device plates (260) which form openings (295) for receiving the stationary mold and form the knife edges (26OA) around the plate openings for supporting the stationary mold. 6. Apparatus according to claim 2, 3, 4 or 5, characterized in that the chambers through to Controlling the flow of hot gas between the chambers, adjustable valves (252) in communication with one another stand. 809828/0482 7. Device according to one of claims 1 to 6, characterized characterized 'that the Pormabschnitte have telescopically engageable end portions (291,293). 8. Device according to one of claims 1 to 7, characterized in that the stationary form an outer tubular shape represents that a stationary inner tubular shape extends into an inlet end of the tubular Outer shape extends that the tubular inner shape in the inlet end of the tubular outer shape with a Space between the inner and outer shape is supported. 9. Apparatus according to claim 8, characterized in that a gripping and pulling device (217) for Gripping the felt and for pulling the felt between the inner and the outer form is provided that the gripping and pulling device is arranged between the inner and outer molds in the direction of advance of the felt, and that a cutting device (223) is provided for cutting the felt into separate lengths; and that the cutting device (223) is arranged in the feed direction of the felt on the other side of the gripping device. 809828/0482