DE2054952A1 - Layered ski and method of making it - Google Patents

Description

/ I '; jJi-ünuung refers to a layered ski and uj " -iii Vei-rnhron to He.inoi

/ fj :: cficn would offer Skic miih ¹ ". For their production • la ^ broiJ'fjiL -'-. uc; l>e; onders ^ leiclimäßifiem wood in the desired ü'ona f'-oijoi ;; en, an two üeiton with a binder coated ■ mo UD * he eklebt heat and outer layers ijruck aur ^ Such Uni .. ·, erl / f order :: r - ';.. bkla.sf-i) ^j; e i'actileute to their Manufacture, f'i ';:.;-; hen dif- supplies of (-jeei ^^ ietem wood zur Keifje, so that', ^f i ··· j-ti; ■; <· .- okir; always teui -he will be.

ι j-- r; ν; IT iich to Φ ": η Ed f, lholz K ern by cheaper wood or 'jurcr · i un :: t, ;; t, oJT zu av :; ^ Lz ^ i, docJi libt the quality below oi-r'M .-L i-fin, also wurclon die oki, heavier. All dif.-nc Üactiüeile

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BATH ORIGINAL

are overcome in the ski of the invention in that the
Ski a core made of synthetic foam with a specific
Has a weight between 0.4 and 0.7.

Thereby, the method according to the invention for manufacturing such a ski very simply by the foam plastic core is molded with the side edges of walls of the ski in a metal mold together%. The cover and base plates can also

of the ski in the metal mold connected to the synthetic foam by holding the four walls apart with spacers before pouring the foam. The spacers are poured in.

This ski, constructed in this way, can be fitted with a layered plate on the top covers aä ^ n, the top of which is decorated, also on the underside with a sole plate and on both sides with metal strips. All of these parts can be done in the same operation be united with each other in one form.

The drawing shows, for example, schematlsch and partially
in section a preferred Auälihrungsbei game of a ski according to the invention.
In the drawing is:
1 shows a cross section through a ski according to the invention,

BATH ORIGINAL

109821 / U08

Fig. 2 is a perspective view of a portion of a partially finished ski according to the invention,

3 is a perspective view of a portion of a metallic mold for making a ski according to the invention,

1 ' ¹ Ig. Figure 4 is a cross-section through another type of mold containing a ski according to the invention;

Fig. ¹ } a cross section through a ski core, as it can be produced with a mold according to Fig. 4,

FIG. 6 shows a cross section through a supplemented ski according to FIG.

Fig. 7 is a perspective view of a spacer such as he in the manufacture of the ski of the invention in a " egg norms according to Fig. 4-6 are required,

Fic-, ö a plan view of part of a slria according to FIG iii-finding in which the spacers are in rebroch en Lines are entered and

Fig. '3 <"- i.iι cross section through a r-nd ^ re performance; -form of a-

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BATH

Skis according to the invention, in which the spacers form part of the side walls.

According to FIG. 1, the ski 1 consists of a top layer 2, one Lower layer 3 and a core 4. The upper layer 2 in turn consists of three layers 5, 6 and 7, the lower layer three layers 8, 9 and 11 and two sidebars 10. The Layer 5 consists of fiberglass, layer 6 of aluminum, and layer 7 is a decorative cover plate. 8 is a glass fiber layer, 9 an aluminum plate and 10 are skirting boards.

The top and bottom layers 2 and 3 are attached to the core 4 by binding agents, Screws, rivets or the like. Attached. The core 4 consists of Kunctschaumstoff, such. B. Polyurethane, with a specific gravity between 0.4 and 0.7. & in lower specific weight results in a significantly reduced durability, a higher, too high weight of the [y-i

^ The synthetic foam mainly has p: rnchlor— open pores. This increases the "Kestirkeil". Dor Ski tir.cJi i'if. 1 has no special side walls.

Synthetic foam is slightly deformed, so that .soinc Using one major difficulty overcame ic-t that occurred when using other idiwerer materials to be processed,

109821 / U08 BADOR ₁ G ₁ NAL

ale Soitenwande 22, which the foam core 21 in the ski according to Jti'i} ;. 2 can be omitted.

ide in i'ip ;,? s ^ez 6iE'be Hetr.t U-shape 25 has a cover 24 with -C / iü-LÜllooljrungen 2 ^. Should a ski core after i'ig. 2 are poured, the cross winds 22 are used before the greeting. The SoItenVjfinde are to be - wdse mis ABS (ncrylonitril-butsdyn- '

: ■; t / Roij-j: aiiist panels, irhenol-kuniityt oi'f flat ene, or the like • f:. ^ferbif:;. t, are as about 1 mm thick. One side, according to the i'orm zn, is covered with a glass fiber mat 26. Then f-chaum-Ll · i.xioer uüik b.stof f, like bretlrm, ABS or dpjl. filled by the i.o'ij'uriß-en 2 ^ in tüo! 'Όπα?;>.

1:, L 'VLo ϋ'υ: πα f ^; ; fulfilled, εο the bores 25 are closed, uii'-i the λ un stoff pjeschäumL, so that the specific gravity <\ <: '. i.ei'neoteriols is between 0.4 and 0.7. The foaming c: i-iπ;], jjt-ticü the side walls 22 firmly to the i'orm walls, so that Λ

oe.r SkJ. i ^ enau aie jreviunschte uestalt; receives. At the same time (iL the huristscnauiitstoff ruffled firmly with the cross winds.

:; o Jierß-established ski core is then provided in the usual way with -r "OKoTvitiven cover plate, Sbf <hlkant; en etc.

bf) ·, an ^ rinp; en of side plates omitted and the core iiat tjf-. '/. i'ii , I. ion Schw: inppmp; sdämp ^f 'unp;,i''entigke.i L, flexibility. i ±. df;] ..

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the same properties as cores made from precious woods.

In the ski according to Fig. 4-, the cover plate 39 and the Base plate 38 before pouring the foam 35 into the Form 31 and are placed under the foaming pressure with the Core connected. The plates 38, 39 must, however, be very precisely positioned the mold must be fitted, otherwise they bend under the foaming pressure or foam when pouring penetrates between the mold wall and the plate, so that the plate is then completely encased by the foam. To prevent this, are according to Fig. 4 spacers 36 between the plates 3 & and

39 set.

The filling of the foam in the form 3 ^ is done through Pour nipple 32, while the air through holes 33 in the

Form cover 34- escapes.

The spacer 36 consists of ABS or other loins tr; tof f.

or from a light metal alloy, and is H-shaped

designed as Fig. 7 shows.

The side parts 36b and the middle part 36a are for passage of the foam material perforated many times. The holes are with

3? designated.

As Fig. 8 shows, over the length of the SkikerriH several

Spacer 36 distributed at a large distance.

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To produce a ski, according to the invention, the procedure is as follows follows:

On the bottom of the mold 31, a base plate Jö z. B. placed from fiberglass material. A plurality of spacers 36 are placed on the plate J6 at a distance from one another. The cover plate 39, which also consists of glass fiber or reinforced plastic, is placed on the spacer 36. Because the mold 31 is closed with the lid ^ A and screwed tight. The foam pressure presses the plates 38, 39 against the mold walls and completely encloses the spacers 36. Finally, a ski core 40 can be taken from the form ~ -y \. The strips 41, 42 can also be attached to either side. (Fig. B). Trim strips 43 and a decorative cover layer 44 are attached to the cover plate 39, on the base plate 38, steel edges 4 ^ and a base layer 46. In this way, a υκι 4y.

The same ski can, however, also be obtained in one operation by keeping all the layers apart, keeping them apart, placing them in the empty mold and then pouring the foam.
Tests have shown that the weakest part of the ski is the

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Boundary layer between the foam core and the shell layers is. Layers of skin form on the surfaces of the foam, which detach from the shell layers when stressed. The temperature of the mold and the poured foam material, as well as the foaming temperature and time are of great influence on the formation of the surface edge, especially its thickness.

A particularly thin skin is created, as desired, if the following conditions are met.

Temperature of the mold before pouring: 30 ° C - 70 ° C ^{11 of} the casting material before pouring: JO ⁰ C - 70 ° C Foaming temperature: 50 ° C - 90 ° C

Foaming time: 20 minutes.

In one embodiment, a mixture of polyol and isocyanate 1: 1.35 was selected as the foam. The table below gives the properties of the foam obtained under different conditions. · ■ * ■ In the table, A is the mold temperature in 0 before casting, B is the temperature of the casting material, C is the foaming temperature

and D is the foaming time. E is the strength in kg / mm

according to DIN 534-23, F is the modulus of elasticity in kg / mm ² , G is the number of blows according to the Izod test method in kg cm / cm, Ha is the thickness of the skin formed on the surface layer of the cover plate in mm, Hb is the thickness the one in the boundary layer against the

109821 / UOa

"n

Il
I. - Curing conditions ■ C. D. Table t I • G of Foamed a Cor « a I. 28 b 29 Jb t-
I. λ 30th Characteristics 8.18 H .7 0. 29 0. 31 I. I. 30th 60 20th B. F. 8.48 .5 b 0. 27 0. 32 30th 30th 40 20th 3.46 71.5 8.91 1 .5 ' 3.4 '0. 36 0. 36 30th 40 70 20th 3.72 72.9 9.69 1 .6 3.0 0. 30th 0. 35 40 40 50 20th 3.64 71.6 11.00 1 .5 2.5 C. 33 0. 3i 40 50 80 20th 3.84. 68.7 11.90 1 .0 2.6 G. 33 0. 33 CD
CD 50 50 60 20th 3.78 71.6 13.20 1 .3 2.2 0. 38 0. 43 OD 50 60 90 20th 3.92 69.9 13.70 1 .1 2.0 0. 35 0. 36 -N. I. 60 60 70 20th 3.92 70.1 9.70 1 .5 1.6 0. 0. 60 70 20th 4.10 71.7 1 1.8 70 3.85 68.8 1 2.5

r.i ο

m O

cn

Baseplate formed skin. Ia is the shrinkage in percent of the foam core in the longitudinal direction of the core and Ib is the shrinkage in percent of the foam core perpendicular to the longitudinal direction.
In this experiment, the mold contained only foam alone.

In the ski according to FIG. 9, the side walls 36'b are through the Splash of spacing 36 'formed.

109821 / UOe

Claims (10)

. DlPL-ING. HELMUT HUBBUCH PATENT LAWYERS 753 PFORZHEIM. November 5, 1970 I / K WESTLICHE 3I (AM LEOPOLDPLATZ) TEL .. (Ο7231) 24290 Patent claims: M.J ski in which the outer layers are made up of a middle layer Enclose plastic foam with a specific gravity between 0.4 and 0.7 between them. 2. Ski according to claim 1, characterized in that the Synthetic foam has essentially closed pores. 3. Ski according to claim 1 or 2, characterized in that the synthetic foam layer (4, 21, 35) reinforcing means (36) includes. 4. Ski according to claim 3 »characterized in that the reinforcing means (36) have H-Eorm. 5. Ski according to claim 2, characterized in that the synthetic foam core (4) is part of the outer ski wall forms. 6. Ski according to claim 4, characterized in that splashing (36 * b) of the reinforcement means (36) the side walls of the . Make skis. 101821/1408 7. Process for the production of a ski with a synthetic foam core, characterized in that the side strips of the ski are placed on the side walls of a hollow mold, the plastic is then poured in and foamed. 8. The method according to claim 7 »characterized in that the top and bottom plates, held apart by the side walls, are placed in the mold before casting. 9. The method according to claim 8, characterized in that spacers are inserted. 10. The method according to claim 9 »characterized in that the flanges of the H-shaped spacers form the side walls of the ski. 109821/1408