DE1703352A1 - Parquet board and a method and a device for their production - Google Patents

Description

. H.LEINWEBER dipl.ing. H. ZIMMERMANN

Postal check account: Bank account: Telephone Tel.-Adr.

Munich 220 «Dresdner Bank ag. Munich (0811) 261989 Lelnpat Munich

Munich 2, Marlenplatz, account no. 92790

Z / Ri / ho

8 Munich 2, Rosental 7, 2nd ed. (Kustermann Passage)

the f & shark Ί3ΒΒ.

iroUSTRIE-PLANUMS-GESELLSCHAFT m.b.H., Landau (Isar)

Parquet board and a method and a device for their

Manufacturing
Addition to patent (patent application I 35 830 Ic / 58k τ. 4.3 * 68)

The invention relates to a parquet board from a A plurality of interconnected, the parquet surface form the parquet strips, which are in relation to each other by one on their Underside attached carrier material layer made of low-quality material are determined according to patent ....... (patent application I 35 830 Ic / 38k v. 4.3.68) and a method and a device for the production of the parquet boards.

Such parquet boards offer the advantage of high stability and the possibility of making the surface very qualitative to design high quality material without causing particularly high manufacturing costs.

According to the main patent, it is proposed in particular to use a carrier material layer which is made of a curable

-2- 209831/0108

Binder consists of mixed chips, fibers or wood wool. The production of such layers demands production engineering Requirements that may not be met, especially in smaller manufacturing companies. To also here and in cases in which an air-permeable, breathing floor is desired, those resulting from the main patent In order to be able to achieve advantages, it is proposed according to the invention to consist of a carrier material layer in the form of a softwood underlay to use strips arranged at an angle to the grain of the parquet strips. With that comes an easy to process, cheap one and generally abundant material, namely softwood, for use by its orientation with respect to The parquet fiber has the necessary point and surface load capacity. Particularly light, ventilated and In addition, material-saving parquet boards are obtained if the strips of softwood underlay that lie next to one another are used a space between them are arranged.

For floors with low loads, it is possible to design the parquet boards with a single layer of softwood strips, which are approximately at an angle of 45 ° to the grain of the parquet strips, and, for example, at a mutual distance of 10 mm, are glued to these. Parquet boards for more resilient floors are distinguished according to the invention by the fact that the softwood urite layer consisting of two parallel strips

2098 31/0108

Layers are formed, which are laid to one another in a cross bond and connected to one another and their laying and fiber directions are aligned approximately at a 45 ° angle to the fiber directions of the parquet strips. The grain directions of neighboring parquet strips are usually arranged at right angles to one another. The parquet board formed in this way is highly resilient, very stable and easy to transport.

It can be advantageous if the softwood underlay on the underside with running in the longitudinal direction, under mutual Is provided spaced incisions. This can lead to any tension in the softwood underlay find a balance.

According to the invention, the parquet panels can easily be in a continuous working process are produced, the Process steps are carried out one after the other along a feed path. Accordingly, softwood strips are first made into the two-tier Base produced, and then the parquet strips already otherwise produced on parquet machines are placed on this upset. These are continuous, i.e. in full breadth, The parquet track produced is finally cut into individual panels at the end of the feed track transversely to the transport direction. The resulting parquet panels thus have a design

-4-209831 / 0108

elongation of the manufacturing device transversely to the transport direction dependent, constant length and a distance of the cutting dependent selectable width. The device for producing the parquet boards according to the invention or for carrying out the according to the invention The manufacturing process is characterized in that the devices for carrying out the individual process steps are equipped with endless conveyor belts Feed path are arranged. The corresponding ones, which are advantageously equipped with rollers for planing and / or belts for grinding Stations of the device are preferably equipped with twice the number of rollers or belts required; this allows a tool change without interrupting the continuous production.

Further details, advantages and features of the invention emerge from the following description. On the drawing the invention is illustrated by way of example, namely the two Figures 1 and 2 show the production of the invention Parquet boards in a continuous manufacturing process along a feed path, which in two intersecting Partial routes is shown.

The direction of feed runs from left to right in the drawing. At the beginning of the feed path

-5-209831 / 0108

are two at an angle of + 45 or - 45 to the feed direction opposite magazines 1 and 2 arranged, of which the magazine located below 1 softwood strips on a The infeed belt located under a table 3 and the magazine 2 located further up, which pushes onto the table 3. the Lasts, for example, have a thickness of the order of magnitude from 7 to 30 mm. The top bars are used to form a The upper layer of the underlay and the lower strips are intended to form a lower layer of the underlay of the parquet panels. The bars issued by the magazines are transported by conveyor belts 4 promoted. The magazine 1 for the strips of the lower layer has a glue roller 5 or some other glue dispenser arranged, which provides these lower bars on their upper side with glue over the entire surface or at points.

During their further transport, the strips are with the help

by circular saws or chippers 6 to their dimensions transversely to the transport direction, that is, to the later length of the individual parquet boards, trimmed. This length can be, for example, of the order of 2.5 to 3 _f 5 m.

The table 3 is becoming thinner and thinner as seen in the direction of transport; at its thin end, the upper layer of the softwood strips comes into contact with the lower layer. Via powerful transport rollers

-6-20 9831/0108

and pressure rollers, the layers are pressed together from above and below and then pass through a high-frequency drying zone 7, in which the glue is hardened, whereby the base for the parquet panels are created. The heat treatment to harden the glue can also be dispensed with in the case of thin wood.

When producing a base with a space between adjacent softwood strips, one is not shown Means used before compressing the Laying and hardening of the glue separates the strips of each layer lying close together in a cross connection so that between them a gap of 10 to 20 mm, for example, is created.

After gluing, the base between a lower and an upper planing knife shaft 8 and 9 is constant Thickness planed or sanded if necessary. The double arrangement of planer knife shafts means that one set can be removed at a time and reground without having to interrupt the continuous manufacturing process. After planing it will on the top of the support by means of spray nozzles 10 or 11 running back and forth or with the help of rollers in one another The binder and hardener of a two-component glue are applied separately.

-7-209831 / 0108

The base is then ready for the parquet strips, which are made of high quality material, to be laid on.

The parquet strips, which are square in the example described, are made in a known manner with the aid of parquet machines has been manufactured. After sorting, they are placed in a clamping frame 12 which is transverse to the transport direction of the Feed path is displaceable. This clamping frame 12 is exchangeable and in each case to the type of parquet to be laid, for example mosaic, strip or lamella parquet with the selected Parquet strip size, adjusted.

The clamping frame 12 is in the device described only available once; its double representation both in FIG. 1 and in FIG. 2 is only used for greater clarity the continuity of the manufacturing process beginning on the left in FIG. 1 and ending on the right in FIG.

When the parquet rods are inserted into the tensioning frame, are still on those edges, on which then a Spring is milled, a long bar 13 or a short bar 14 placed, which are taken from appropriate magazines and from the material of which the spring is formed. Is the stenter frame now complete, it is shifted sideways and lays the parquet strips on the base coated with glue on. They are aligned there and by means of a reduced

209831/0108 -8-

thrust revolving high frequency heating and pressing device firmly connected to the base. From this pressing device, an endless parquet belt is pushed forward. This Parquet tape is now trimmed again at 16 and provided with corresponding milling cutters 17 and 18 on the later end faces of the parquet board with grooves or tongues.

After these frontal processing, the parquet tape is ground with the aid of three grinding belts 19. Three more sanding belts make it easier to change. The honed Parquet tape is then cut into the desired parquet board width by a saw unit 20 running along with it, and at the same time milled with a milling unit 21 connected to the saw unit 20 to form springs. The resulting parquet board now runs against it over fast-moving conveyor belts 22 a stop and is grooved with a milling unit 23 on the second longitudinal side.

The finished parquet boards or parquet belts will be then stacked and fed to the painting device.

209831/0108

Claims (1)

Claims ι 1.) Parquet board made of a plurality of interconnected, the parquet rods forming the parquet surface, which are attached in relation to each other by a on their underside Carrier material layer made of low-quality material are determined according to patent ....... (patent application I 35 830 Ic / 38k v. 4.3.1968), characterized in that the carrier material layer is a softwood base made of strips arranged at an angle to the fiber direction of the parquet strips. 2. Parquet board according to claim 1, characterized in that the strips of the softwood underlay lying next to one another are arranged with a space between them. 3. Parquet board according to claim 1 or 2, characterized in that the softwood underlay consists of two of each parallel Last existing layers is formed, which are laid to each other in a cross bond and connected to each other and their Laying and fiber directions approximately at a 45 angle to the fiber directions the parquet strips aligned shd. 4. Parquet board according to one of claims 1 to 3, characterized in that the softwood underlay on the underside with running in the longitudinal direction, under mutual -10- 209831/0108 Is provided spaced incisions. 5. A method for the production of parquet boards according to claim 3, characterized by the following, along a feed path Process steps carried out: Continuous arrangement of the strips made of softwood in two layers, each on one level, below one of the other Angle of 90, with glue in between, on the feed path; Trimming of the layers by edge cutters (6) arranged to the side of the feed path; Joining the layers together by pressing; Planing the base produced by joining the layers on their top and bottom; Applying glue to the top of the base; Laying and grouting of the parquet strips in their final Order on the base; Pressing the parquet strips onto the base; Providing the edges of the parquet tape created by gluing the parquet strips onto the base with grooves or springs; Planing and / or sanding the surface of the parquet tape; -11-209831 / 0108 Cutting of the parquet tape transversely to the feed direction into parquet boards; Providing the cut surfaces of the parquet boards with grooves or tongues with the help of milling cutters that move with the feed (21.23) ..- 6ν Method according to Claim 5, characterized in that that to apply the glue to the top of the base, the two components of a two-component glue are used one after the other sprays on. 7. The method according to claim 5 or 6, characterized in that that the glue layer is heated to join the two layers of the base with each other and / or the base with the parquet strips. 8. The method according to claim 7, characterized by a high frequency dielectric heating during pressing. 9. The method according to any one of claims 5 to 8, characterized characterized in that the parquet strips are first arranged in groups in a tenter frame for placing on the base, then places the stenter on the base, emptied the group of parquet strips and attaches them to the parquet strips that have already been laid on connects. -12-209831 / 0108 10. Device for performing the method according to one of claims 5 to 9, characterized in that the devices for carrying out the individual process steps are arranged along the feed path equipped with endless conveyor belts (4, 22). 11. The device according to claim 10, characterized in that at the beginning of the feed path a ver in the feed direction w young horizontal plate (3) is arranged, on the upper and underside there is a strip magazine (1,2) for the stomach of the strips of the upper or lower layer of the base. 12. Apparatus according to claim 10 or 11, characterized by cutting rollers (8, 9) or belts (19) for planing and / or grinding. 13. The apparatus according to claim 12, characterized in that a compared to the required at the planing or grinding point Number twice the number of rollers or belts is provided, of which half are alternately attacked is to be brought to the underlay or the parquet tape. 209831/0108 Blank page