DE102005060554B3 - Making openwork articles from resin-impregnated glass fiber rovings comprises stretching a fiberglass strand over pins on frames to form a two- or three-dimensional structure - Google Patents

Abstract

Making openwork articles from resin-impregnated glass fiber rovings comprises passing bundles of rovings through differently colored resin baths, combining the bundles to form a fiberglass strand, stretching the strand over pins on frames to form a two- or three-dimensional structure, beading the edges of the structure, tensioning the structure with crossbands, and leaving the resulting article on the frames until the resin has cured. Independent claims are also included for: (1) apparatus for making two-dimensional articles as above, comprising a stretching frame with removable pins; (2) apparatus for making three-dimensional articles as above, comprising two or more stretching frames as above.

Description

The The invention relates to a method and an apparatus for the production of objects made of fiberglass, namely spatial and areal Furnishings and design elements made of resin-impregnated fiberglass (rovings), namely filigree consumer goods, furniture, Room dividers, wall decorations, gazebos and accessories or more similar objects for indoor and outdoor areas.

Known are home and garden furniture as well as accessories made of braided material, such as willow, ratan or similar natural raw materials. The same products are also made of soft PVC cords and ribbons. A well-known product of this material are beach chairs. Also known are armchairs from the CANE-LIVE collection (www.cane-line.com), which are made of through-dyed polyethylene HULARO ^® braiding material.

Basically they need this Products to achieve their strength and stability additional pursuit and supports, who wear the respective braid. This method of preparation is expensive, tedious and complicated. When using PVC soft plastic In addition, the base material is regularly available only in one color and only through the different combination of braiding materials different colored braids can be produced.

For producing predominantly made of plastic fiber-reinforced plate-shaped objects, such as rotationally symmetric slices, in particular grinding or cutting discs, inter alia, in DE 42 34 083 A1 for laying textile and in particular made of glass fibers threads proposed a device in which the fibers are laid in line position without excessive thread concentrations, which would otherwise lead to local thickening and irregularities of the yarn layer.

To are those of a yarn guide supplied Threads on a curved Web continuously on a position plate to variably arranged Fixed points placed in any configuration, so at the intersections always only two threads on top of each other lie. Following will the thread scrim pressed with a partially heated pressure plate. The Fixed points on the location plate are caused by moving upstanding Pins formed.

These Device requires a considerable mechanical effort Control of the pins. For laying resin impregnated rovings this device is not usable, since residual resin remains the mechanics render useless after a short time. As a result, the production rotationally symmetric discs requires at least two steps, in the after laying and pressing the scrim in a second Step outside the device is fixed with a binder. This is one such device for size freely mouldable fabrics independent of mentioned defects ineffective.

The The invention aims to develop a method that makes it possible to resin impregnated rovings too filigree, spatial and flat living and garden furniture, Articles and accessories with net and ornamental ones Making structures in a simple way, without the static support elements needed become. In particular, the material to be processed with color carriers so be equipped in which the roving strand of in the beginning is color-equipped and the production of products with different shades to woodgrain effects and decorative lighting effects.

The inventive features to implement this objective are for the method in the claim 1 and the device in claims 9 and 10 executed.

To According to these invention-specific features, the method comprises the following technological Steps.

to Processing come open as long as desired Rovingstränge, the As is known, continuously soaked in a resin dip and subsequently be stripped off.

The Special feature of the procedure is that individual or off several rovings existing strands be combined into two or more bundles of strands, after being pulled in detail by separate immersion baths with resin, the resin in these baths with different color carriers and decorative light-reflecting pigments.

To the watering and stripping the bundles of strand are added under low pressure a fiberglass strand combined and fed to the processing.

The processing into spatial and planar structures with reticulate and ornamental structures takes place in such a way that the fiberglass strand on a jig, namely on tenter, geometric or free-shaped discs or free molded or polygonal ring carriers, starting from a predetermined attachment point under tension in the change over diametrically arranged deflection points is wound, these deflection points are embodied by peelable connector. The arrangement of these plugs takes place on the periphery and on webs of the clamping device according to the predetermined pattern in finite odd or even number with a constant or variable distance.

Of the Fiberglass strand is changed from the selected as a stop plug in succession over all Plug tightly clamped until the predetermined surface pattern and spatial netted and ornamentally structured structures, for example a Rotating body, is completed.

at spatial Forms, if provided, in one step, the surface pattern wrapped and subsequently the spatial Structure built. For this, the fiberglass strand between the plugs of at least two geometrically or freely formed discs or analog ring carriers clamped alternately, the winding according to the predetermined winding pattern parallel to the axis of rotation (plumb line), with a rotation angle offset or zigzag from wrap loop to wrap loop in both circumferential directions he follows.

In another step is at the periphery or edges of the sheets and geometric body Wrapped a bead of beads by the fiberglass strand several times in the Change to juxtaposed in a line connector is guided helically, until a full closed edge bead has formed.

to increase stability and as a decorative element, free surfaces become more geometrically shaped Body, for example, body with cylindrical, elliptical, hyperbolic or polygonal Form and half shells in another step with the fiberglass strand wound under pretension with a bandage. At hyperbolic bodies this bandage is wound in the area of the smallest radius.

Analogous be webs of fabrics in same as the bandages performed.

To Completion of the product is the final curing of the resin at room temperature, with warm air or by means of radiant heat of a light or IR or UV source.

To the hardening the plugs are pulled out of the clamping device and the plug holes without Jewelery function sealed with resin of the corresponding color.

The Device for using the method consists, as above executed for fabrics from a tenter frame with a finite number on the periphery and peelable connector, which is a uniform or uneven distance taking.

For spatially shaped body If the device consists of at least two geometric or free shaped disks or free-formed or polygonal ring carriers, the Radially outward on the circumference bear directed connectors as on the clamping frame. The slices will be supported by a common rotatably mounted thru axle and in Distance fixed. Ringbearer become either in their point of shear or by means of several supports supported by a turntable.

At the Manual winding allows the device to be rotated step by step become. The manual work is so facilitated and allows good Quality work.

imaginable but is also to mechanize the device and the winding process PC-controlled application.

The made in this way products with net, ornamental and filigree structure are self-supporting, stable and lightweight. This positive effect when winding cylindrical, kegliger, hyperbolic or polygonal body and sheet is achieved by intersecting and touching fiberglass strands after curing of resin fixed connecting knots and through which in different Directions and dimensions diagonally strained fiber strands structural load-bearing Forming triangles. This gives the end product its own high stability and strength awarded. This effect can be enhanced by fiberglass strands of different thicknesses.

By the possibility, the individual strand bundles to color differently and to equip with decorative pigments, the fiberglass strand can processed with different shades and decorative effects become. For example, you can in this way with simple means and low technological Effort imitations of a wood grain, glitter effects and luminescent lighting effects be generated. This makes the production of products in artistic Variety, with high display value without restriction of its utility value possible.

The products made of fiberglass according to this process are largely insensitive to external environmental influences and solar radiation and easy to care for. Despite its filigree structure it draws a robust stability and low Weight out and they are comfortable to handle.

With This method is particularly suitable for both the living and garden area as well as for commercial Purpose chairs, Tables, benches, Stools, room dividers, accessories such as flower stands, bowls, wall shelters pavilions or similar Furnishing and design elements or consumer goods with filigree net and ornamental structure with low technological Create effort. But also products for other applications are executable.

following should the process on the example of a table frame and the used tools for its preparation are described. Furthermore, two sample proposals are submitted. Show it:

1 : a winding pattern approach for a foot surface,

2 : the clamping device for the table column in a perspective view,

3 a marginal section of a circular disk with wound fiberglass strand for the edge bead,

4 : a sample proposal for a room divider or a gazebo wall,

5 : a sample proposal for a chair in a side view.

The clamping device for the production of a table frame consists of the round disc 2 for the table stand and the disc 3 for the support of the tabletop. Both discs 2 and 3 be from a rotatably mounted thru axle 4 worn and fixed at a distance to each other. The disks 2 and 3 can be made different in diameter. On the circumference of the discs 2 and 3 are a finite number of removable plugs 5 arranged radially. Depending on the pattern, the distances between the plugs can be the same or different.

Assuming, for example, that of ten roving bobbins each five folded multifilament roving strands are combined into one strand bundle and each of these strand bundles are pulled through a resin dipping bath of different color, then these two strand bundles are untwisted under low pressure after stripping off the excess resin a fiberglass strand 1 merged. In this case, individual yarn fibers of differently colored and occupied with decorative pigments strand bundle shift with each other and can be a fiberglass strand with different shades and decorative effects arise. For example, if there is white resin in one dip and brown resin in the second dip, then the fiberglass strand will be replaced 1 in the end, a color pattern that comes close to a wood grain. In this way, the most diverse color patterns can be combined and create decorative effects.

In the first processing phase for the production of the table frame, the base surface is wound. The fiberglass strand 1 is at a predetermined connector before the first winding step 5 (Attachment point "a") of the disc 2 struck. Then he gets on the disc 2 , as 1 shows, according to the predetermined pattern wound under uniform tension, in which he chord-like over the disc 2 , the thru axle 4 tangent to the opposite in the Sehnenflucht plug 5.1 to be led. Here is an envelope and the fiberglass strand 1 becomes tangent to the next connector on the other side of the thru axle 5.2 recycled. After repeated handling, the winding process continues on the first thru axle side. This process is repeated until the entire disc 2 and so that the later stator surface is covered with a star-like net. The pattern can be varied by means of differently selected transfer points.

After completion of the base, the table column is adjusted according to 2 wound. For a better overview here was the winding pattern of the base according to 1 not shown. The continuously tracked fiberglass strand 1 is from the last occupied connector 5.3 at the disc 2 to a staggered in the twist plug 5.4 on the upper disc 3 braced. After a semi-stroke and tangential misalignment becomes the fiberglass strand 1 over the plug 5.5 to the next plug 5.6 on the lower disc 2 recycled. This is followed by a tangential jump to the plug 5.7 from where the fiberglass strand 1 back to the upper disc 3 to be led. This process is repeated in a circumferential direction over the entire circumference of the discs 2 and 3 , Following a reversal of the winding direction, so that at the end of a net-like body of revolution is formed with hyperbolic shape.

Also conceivable cylindrical network body with vertical strand course. There is also the possibility of additional flashovers at the intersection points of the strained fiberglass strands 1 or by changing the winding distances between the occupied plugs 5 produce variable patterns.

After completion of the table column is on Scope of the discs 2 and 3 with the fiberglass strand 1 in the helical change between the plugs 5 as in the section of 3 pictured, a marginal ridge 6 wound. When laying the edge bead 6 there are no unsealed areas. The uncured resin is smoothly spread without dripping to a smooth, grippy surface.

The edge bead on the disc 2 forms the footrest pad for the table and at the disc 3 the support for the tabletop.

For stiffening and as a decorative element of the table column is to close in the area of its smallest diameter with the fiberglass strand 1 wrapped under tension a bandage.

Immediately after completion of the table frame, the setting of the resin takes place at room temperature or with warm air or radiant heat of a light, IR or UV source up to 80 ° C. Subsequently, the plugs 5 pulled, the clamping device dismantled and the unwanted plug holes in the edge bead sealed with resin.

In 4 is a sample proposal for a room divider or pavilion wall and in 5 a pattern for a chair shown. Marked are the edge bead 6 and the possible arrangement of individual bandages 7 , At the room divider 4 These bandages are designed for stabilization and stiffening as webs. All structures of the presented patterns are, as described above, with a fiberglass strand 1 wound. Foreign materials for stiffening and shaping are not provided.

1

fiberglass strand

2

disc

3

disc

4

floating axle

5

plug

6

bead

7

bandage (Web)

"A"

anchorage point for the fiberglass strand

Claims (10)

Process for the production of spatial and planar furnishings and design elements made of resin-impregnated open roving strands (fiberglass), namely consumer goods, furniture, room dividers, accessories, wall decorations, gazebos and similar objects for interior and exterior areas with filigree structure, characterized in that several roving strands into at least two bundles of bundles, impregnated in separate immersion baths with differently colored resin mixed with decorative pigments and subsequently coated to form a fiberglass strand ( 1 ) and that this fiberglass strand ( 1 ) continuously on a tensioning device, namely on clamping frames, on individual or at a distance fixed geometrically or freely shaped discs ( 2 . 3 ) or on freely shaped or polygonal ring carriers, starting from an attachment point subsequently alternating between a finite number of spatially separated connectors ( 5 ) taut to a sheet or a spatial body in a predetermined network and ornamental structure and at the edge of the sheet and the spatial body a Randwulst ( 6 ) is wound, wherein the thread strand several times alternating helically along juxtaposed connector ( 5 ) and that freely supporting surfaces of the spatial body and connecting webs in fabrics under tension with bandages ( 7 ) and that the article thus produced remains in the chuck until the resin has hardened. Method for producing spatial and planar furnishing and design elements according to claim 1, characterized in that the strand bundles under low pressure to the fiberglass strand ( 1 ) are merged. Method for producing spatial and planar furnishing and design elements according to claim 1, characterized in that the fiberglass strand ( 1 ) is performed differently depending on its structural position to increase the strength or to achieve a decorative effect. Method for producing spatial and planar furnishing and design elements according to claim 1, characterized in that glittering and luminescent pigments are added to the resin. Method for producing spatial and planar furnishing and design elements according to claim 1, characterized in that between the plugs ( 5 ) wound fiberglass strand ( 1 ) parallel to each other, with angular offset and zigzag overlapping. Method for producing spatial and planar furnishing and design elements according to claim 1, characterized in that that after completion of the winding curing of the resin at room temperature, with warm air or by radiant heat of an IR or UV radiation source up to 80 ° C he follows. Method for producing spatial and planar furnishing and design elements according to claims 1 and 5, characterized in that the plugs ( 5 ) when laying the fiberglass strand ( 1 ) are easily, repeatedly and at intervals to each other occupied. Method for producing spatial and planar furnishing and design elements according to claim 1, characterized in that that the remaining in the manufactured article plug holes with Resin to be sealed. Device for the application of the method according to claim 1, in particular for the production of a sheet, wherein for fixing the roving strands are provided plug, characterized in that a clamping frame is provided, which at the periphery and at the webs a finite odd or even number peelable plug ( 5 ) at regular or irregular intervals. Device for the use of the method according to claim 1, characterized in that for spatial body a frame consisting of at least two spaced-apart geometrically or free-shaped discs ( 2 . 3 ) or free-formed or polygonal ring carrier is provided, at its edge radially outwardly peelable plug ( 5 ) are arranged, and that the discs ( 2 . 3 ) and ring carrier together by a rotatably mounted thru axle ( 4 ) or more supports are supported on a rotating device and fixed in their distance from each other.