DE2248943A1 - RESIN APRON - Google Patents

Description

The invention relates to vehicle fenders.

Various vehicles, e.g. bicycles and "motorcycles," are included Equipped with fenders made by press molding metal sheets of iron, aluminum or the like. Around To offer a nice look, the surfaces of the mudguards are covered with paints, varnishes or coatings. But when If the coating layers of the fenders are removed, rust will appear on the surfaces and give an ugly appearance. Such mudguards must continue piece by piece by compression molding made of sheet metal. This is of course time consuming and not suitable for mass production.

Mudguards made of synthetic resins are known, e.g. from the published Japanese Patent Application 12773/72. This Japanese patent describes a fender made of a transparent synthetic resin and a metal embedded in this

309815/0904

foil consists. The 'metal foil is made with different colors and provides a beautiful appearance when embedded in the transparent resin. That beautiful look is the essential feature of this well-known fender. However, since such a transparent resin "is generally expensive naturally, the product becomes expensive. Further, the transparent synthetic resin has poor heat resistance and rigidity, and therefore deforms little during a long period of use. Another important point at the known mudguard is that a metallic film is provided in the transparent synthetic resin, which also as electrical conductor can serve. Therefore were known in this case Apron does not take into account the cost and ease of manufacture.

The aim of the invention is to produce fenders in a mass production process to produce at a lower cost than is possible with conventional metal or synthetic resin fenders was. These fenders should also look nice and different be colored and have a good light reflection compared to conventional metal mudguards. Should continue the fenders have good flexibility so that they are safe and little damaged in collisions. After all, they should keep their original shape for a long time.

According to the invention, fenders with a beautiful appearance are mass-produced, with synthetic resins having low Cost, high rigidity and heat resistance can be used as the base material. On the surface of the base material a metal foil is applied, and a transparent synthetic resin having good weather resistance is further applied to the metal foil upset. The metal foil and the layered over it transparent synthetic resin are used for decorative purposes. The usage of a material with a low cost naturally leads to

30 98 15/090 4

low manufacturing cost and the process of applying a metal foil on the base material can be done more mechanically and simply than embedding the foil in a synthetic resin.

In the following, the invention will be explained in more detail by means of exemplary embodiments with reference to the accompanying drawings will.

Pig. Fig. 1 is a side view of part of a bicycle frame provided with fenders;

Fig. 2 is a perspective view of a portion of the Mudguard according to the invention;

Fig. 3 is a cross-section of the fender according to the invention;

Fig. 4 is the perspective view of an example of the Mudguard according to the invention;

Fig. 5 is a side view of an apparatus for producing fenders according to the invention; Figure 6 is a top plan view of the device of Figure 5;

Fig. 7 is a plan view showing another manufacturing method shows.

Fig. 1 shows how the fenders A on the frame B of a bicycle are appropriate. It is known that the fender A is in the shape of a gutter and is curved so that it has the upper part of the bicycle tire to shield the dirt adhering to the tire. The outer shape of the fender according to of the invention is almost the same as that of the fender A shown in Fig. 1, but its cross-section is that of FIG 3, which differs from that of the conventional fenders differs. '

The protective sheet according to the invention has a structure of three Layers, which consist of a basic matertal 1 as an inner layer,

a metal foil 2 applied to the outer surface of the base material 1 is applied as an intermediate layer, and a transparent resin film 3, which is applied to the surface of the metal foil 2 is applied, exists as an outer layer. The basic material 1 is a synthetic resin with a rigidity and temperature resistance, which are suitable for mudguards. The synthetic resin should be relatively cheap, high stiffness and have temperature resistance. Examples of that Synthetic resin are thermoplastic polymers such as acrylonitrile butadiene styrene terpolymer, Polycarbonate, polypropylene, polyethylene or polyvinyl chloride, and thermosetting resins such as e.g. unsaturated polyester phenolic resins. The base material is made from such a synthetic resin is molded in an elongated shape, and the two edges of the material in the longitudinal direction become the same Direction bent to have a trough-shaped cross-section form.

The metal foil 2 is made of aluminum, tin, copper, stainless steel, brass, etc. or alloys. If such Metal foil alone does not have sufficient strength and tends to break during use, the metal foil may can be used together with a reinforcing agent such as a synthetic resin film or paper. The above metal can also work on one surface of a transparent resin film can be applied by vacuum evaporation. Applying the metal foil 2 on the outer surface of the base material 1 is carried out by first applying an adhesive such as a pressure-sensitive or heat-sensitive adhesive applied to the metal foil the outer surface of the base material 1 with this metal foil is covered, and then the metal foil is bonded to the base material by pressing or heating.

The transparent film 3 is applied to the surface of the metal foil 2 as a very thin layer. Examples of that transparent synthetic resin with good weather resistance are white

309815/0904

cties polyvinyl chloride, methacrylic resins, cellulose acetate butyrate, Polyester, cellulose triacetate or polyvinyl fluoride. These resins are high in quality and expensive. Of the transparent film 3 is on the surface of the metal foil 2 using a pressure or heat sensitive adhesive piled up. The transparent PiIm 3 makes it possible for the metal foil 2 to be visible through it and protects it at the same time the metal foil 2.

It is also desirable that the base material 1 and the transparent films are of the kind that 'stick together, to close the metal foil 2 from the air.

The strength of the mudguard is determined by the base material 1 supplied, and the metal foil 2 and the transparent film 3 play a role in the beautiful appearance.

As the base material 1, there is no need to use a transparent resin. In order to improve weather resistance, it should Rather, the base material should preferably be colored black or almost black.

In order to increase the rigidity of the base material 1 or to prevent its thermal expansion, it is possible to use glass fibers, To distribute carbon fibers, metal fibers, etc. in the base material, or a web or fabric, etc. made of these fibers to layer this base material, or to layer or embed a thin sheet of metal on top of the base material.

It is therefore not necessary to have an expensive, "transparent" To use synthetic resin as the base material for the fenders, as is the case with the known fenders described above was the case. ■

309815/0904

The synthetic resin base material 1 used in the present invention has generally a thickness of about 0.5 to 2 mm, but can also Projections or thicker toil in the direction of the longitudinal extension own to give it greater rigidity. These Projections or thicker parts can be provided on both edges of the base material 1 or in the central part, such as it is denoted by 4 in FIG. It is also possible to have one to attach electrical installation wire using the tab 4.

The metal foil 2 can be colored in a wide variety of colors or various patterns may be printed thereon. The metal foil can also be embossed or raised be punched to form patterns that serve to denote the presence of a guard plate.

A suitable average thickness of the transparent film 3 is 0.03 to 1 mm. In this case, a protrusion 5 in the center of the "film 3", and by the lens action the metal foil 2 can be seen enlarged.

As indicated above, the fender is according to the invention from the base material 1, the metal foil 2 and the transparent Film 3 composed. A long strip of this three-layer construction is made consecutively and continuously bent so that a trough-shaped cross-section is created. The strip is then also bent lengthways and up cut the desired length. Then the cut Product is treated with pus to apply a protective layer to the cut areas or around screw holes for Attachment to the vehicle to be provided. The channel-shaped cross-sectional shape of the fender can be of any desired shape and is preferably of a shape that is pleasing to the eye and provides beautiful appearance.

309815/0904

The production of the protective sheet according to the invention is described below in an example with reference to Pig. 5 and 6 described in more detail. The base material 1 is made of a nontransparent synthetic resin of relatively low quality. When a thermoplastic synthetic resin is used as the base material, an extruder 6 is used as used in the Pig. 5 and 6 is shown. A flat strip 1 ¹ of the synthetic resin is extruded continuously from a die 61 of the extruder. 6 While the resin tape 1 ^{1 is} still in the molten state, the metal foil 2 * is fed onto the tape 1 'and is layered on it under pressure. The width of the metal foil 2 'is made equal to or slightly narrower than that of the resin tape 1', and an adhesive is applied to the upper surface of the metal foil 2 '. Then, a transparent resin film is supplied to the metal foil 3 ^f 2 'and laminated on this under pressure. The width of the transparent film 3 ¹ is made equal to or slightly larger than that of the metal foil 2 ¹ . In this way, a three-layer structure a is produced. When a thermosetting resin is used as the base material 1, a long strip of the base material is produced before the thermosetting resin is completely hardened, and then the metal foil 2 and the transparent sheet 3 are successively laminated on this base material in the manner described above, to create the three-layer structure as a unit.

In order to bring the three-layer structure a into a trough-like shape suitable for mudguards, is the structure is guided continuously through a porcelain die 7 and shaped into a channel-shaped structure b. To avoid deformation of the To prevent trough-shaped structure b, this is cooled and solidified by being passed through a cooling tank 8, when the base material 1 is a thermoplastic resin, and is further heated until just before the complete hardening when

309815 / April 09

the base material 1 is a thermosetting resin.

The rinnenföraige structure b is guided into a bending device 9 and in the longitudinal direction to a predetermined curvature bent. The bending device 9 comprises a pair of take-up rollers 91 and a plurality of rollers that come into contact with the two surfaces of the structure b, bending rollers 92 that are on a predetermined curvature line are arranged, and one Cutter 93 to cut the structure b after bending. In this way, the bending device 9 forms the structure b continuously into a curved structure c.

When the base material 1 is a thermoplastic resin, it is softened by heat by a heater 94 so that it is easily bent to a predetermined curvature as it passes through the bending rollers 92. If the base material is 1 a is thermosetting resin, after bending the assembly is heated to fully cure the resin.

Another method of making the three-layer structure is shown in Fig. 7 and comprises passing the metal foil 2 ¹ through the die 61 of the extruder 6, extruding a synthetic resin of the base material 1 onto a surface of the metal foil 2 ', and simultaneously extruding a transparent resin from a second extruder 6 'into the mouthpiece 61' and extruding the transparent resin onto the other surface of the metal foil 2 ', thereby forming the three-layer structure a in one piece.

The invention is illustrated below by means of examples.

example 1

The resin base material 1, the metal foil 2 and the transparent one Fiim 3 listed in Table I were used.

309815/0904

Synthetic resin base *
material

Metallf plieiabanci

transpareater Ulm,

ouch ^
st ^ -ol-Gopol ^ mer
b-lä (> k der- Sit

long ribbon made of
one- Bi, eke voä φ
from 16 mti mi.-fe one .;
ohe-n glue off

Gopölyper

with Br-e-it ©

t'H ter

iftit

SO mm.

Bie. Pelle.ts des o, b, igen etii ^ em aote? AubendurolaDie, sser · from 2'5 _;

s viu.rde..n in ei, ne; m 65- teffl away! e> in; e> iQ;

not,

Bas MetalIf oil band was a linear druot of 1 ^

Eunststaffbandea

became.

two

on the surface © the

In addition, the surface of the metal oil tape given in table 1: under de.tji linearen of t, 5 kg / om history: t _r . uoi the. out of three

form the structure m .,

e Pilia au-.f

The so produced, ordered from three layers: Structure in the molding die with the length of 20.0 mm and the cooling water tank inserted, um. the SchUitzbleöhmaterial

This apron material was made by being an obearo; and lower Roller with a speed of 4 m / rn ·. ^. «, Ajiifgenom.LTien and by the bend given in Table II aing ^ ojhtumgc a & f 'j

predetermine curvature and then bent to the desired I »cut lengthways, automatically continuous synthetic resin mudguard to manufacture.

Yfal ze Table II Type ¥ al ze Three orphan type upper two orphans with a surface.
the shape of the outer shape
of the raw material developed *
speaks lower an orphan with a surface

chenforii, that of the 'inner form of the pouring plate material ent * - speaks

Curvature of the fender

materials 350 R -

Roll temperature 55 to 6O ¹¹ C

Sctineid length. 700 mm

The Kunstbarz-Schutableeli produced in this way was on his Heat resistance, impact-resistant it and weather resistance tested .

A read with repeated heating has been carried out in the method described in TaCbelle JII-I indicated manner, and the results obtained are shown in Table III-2.

Table II1-1

A Zl.nynertöiaperatuar · on (11 hours,} "80 * 0 aaf temperature 0.5 hours ·). Z'inanertemperature to -50 ^e C '| ih.) And

-30 * 0 on room service door

Irwärmung s zytlue ^ ^{1 SM} '^

(3 cycles) _ß room temperature aiaf 60 ⁰ G

(1t hour.) ,, 6Ο · ο «atf Zinmjfrrtem; -

temperature ·· | ΐ hours,.:}. Z-immairtempe ^ -

rature to -2: ö * e '{i1i. St *. > and —2ö ^ö €: autf "

(ι sta.)

309815 / 09Q4

Table III-2

Dimensions before the test

Percentage change in dimensions after the test

Procedure A Procedure B

Distance between the two edges of the mudguard in the width direction

51 mm

Distance between the two ends of the fender in the longitudinal direction

650 mm 2.7 ° /

+ 2,

The shock resistance was determined in the manner given in Table IY-1 and the results obtained are shown in Table -17-2. . .

Table IV-1

Weight of the steel ball Shape of the steel ball

Test item

Temperature during measurement

Type of attachment of the test item 5 kg

Hemisphere with a lower surface with a curvature of 50 R

the above protective sheet was cut to a length of 200 mm 20 ⁰ C, 0 ° 0, -20 ⁰ C -,

the groove shape was directed downwards and sideways

3 0 9815/0904

Table IV-2

highest height of fall that is not yet
Caused breakage of the test specimen 0 ⁰ C -20 ⁰ C Type of attachment
of the test item 20 ⁰ C more than
180 cm more than
180 cm Channel shape according to
directed downwards more than
180 cm 20 cm 20 cm Chin shape
directed to the side 20 cm

The weatherability test was carried out in the table shown in Table V-1 V / e has been carried out, and the results obtained are shown in Table V-2.

Table V-1

used device

Black wall temperature

Time of sprinkling rain nozzle

Spray pressure

Length of the test item Direction of the test item

Weather-O-meter (carbon arc, 2-lamp type, closed type)

63 + 3 ° C

18 min./120 min.

555 cnr / min. (4 nozzles each with this capacity) 1 kg / cm

120 mm

attached so that the transparent film faces the lamp

309815/090

Table V-2

Irradiation time * 'Result · ■

1000 hours no change

1300 h. ■ ■ light rust occurs

the metal foil at the end of the test specimen (cutting area) on

* The exposure time of 200 hours corresponds to an outdoor exposure time of 1 _: year.

Example 2

A crosshead mouthpiece 6 was at the front end of a first Extruder 61 'with a screw diameter of 65 mm and an L / D ratio of 22, and that given in Table I. Acrylonitrile butadiene styrene terpolymer was extruded from the extruder 61 '. JThe aluminum foil tape specified in Table I. was continuous from the back of the crosshead it is inserted and continuously laminated on the upper surface of the synthetic resin tape 1 '.

The front end of a vertical second extruder 6 ', which had a screw diameter of 40 mm and an L / D ratio of 22, was connected to the mouthpiece 6', and from the second extruder colorless, transparent cellulose acetate butyrate was extruded and continuously onto the upper surface of the metal foil 2 in the mouthpiece 61 'is layered to form the three-layer structure a. The temperature of the mouthpiece 61 'at this point in time was 220 ^° C.

309815 / 090A

The total width of the three-layer structure a was 80 mm. The thickness of the resin tape 1 'was 1 mm, and that The thickness of the metal foil 2 was 0.05 mm. The transparent egg in the 3 had a thickness of 1 mm at both ends and in its central part was a protrusion 21 of hemispherical shape along its entire length A granular cross-section with a height of 1 mm and a width of 30 mra is provided.

The three-layer structure a was then passed through a brass molding die 7, which was separably composed of an upper and a lower part with a length of 200 mm, in order to bend the structure into the desired channel-like shape, the resin tape 1 'is on the inside. The molding temperature was about 160 to 18O ⁰ O. The curved structure b was then cooled and solidified by being passed through a water tank with a length of 2 m (water temperature 15 to 20 ⁰ C).

The bent structure "b was then fed into a bending device 9, that of a pair of upper and lower take-up rollers 91, bending rollers 92, a cutter 93 and a Heater 94 existed. The take-up rollers 91 would have one Shape corresponding to the outer and inner shape of the channel-shaped cross section of the mudguard material b, so that the material was not deformed when it was picked up. The pickup rollers were driven by a motor and took up the material at a speed of 4 m / min, which was achieved by a speed reduction gear was discontinued.

The bending rollers were arranged behind the receiving roller 9f and consisted of four pressure rollers and two take-up rollers. the Shapes of the pressure rollers were the same as the external shape the trough-shaped mudguard material b. The first and second

The pressure rollers from the take-up rollers were more horizontal Direction for height adjustment in the vertical direction.

157 090

arranges. The third print roller of the pickup rollers was in a position lower than the first and second, and the axis in the direction of height adjustment was in the Direction opposite to the recording roll by an angle inclined by 35 ° to the vertical. The fourth pressure roller "was located much below the third platen, and its direction of adjustment was parallel to the direction of adjustment the third print roller. ,

The take-up rollers were the same shape as the inner one Shape of the gutter. The first of the pickup rollers was immediately below the position between the first and second pressure rollers. The second pickup roller was located under the position between the third and fourth pressure rollers. These bending rolls were running at the same peripheral speed driven.

The apron material b that is between the pressure rollers and the Receiving rollers went through, became continuous in the longitudinal direction bent with the pick-up rollers as a support point. the Curvature could be freely changed by adjusting the heights of the four pressure rollers. In the present example it was the curvature set to 350 R.

The peripheral speed of the bending rollers 92 was preferably somewhat slower than that of the receiving rollers 91. In the present case For example, the circumferential speed of the bending rollers 92 was set to 3.9 m / min.

The heater 94 heated the fender material and eased it thereby the deformation of the heat-softened synthetic resin base material 1 and the transparent film 3. The The heating device contained an infrared heater of 6 kW / h, the the surface temperature of the fender material during the

309815/0904

7248943

Pass held by the bending rolls at about 70 ⁰ C.

The cutter 93 was a circular saw that cut the material cut while moving in the direction of travel of the curved guard ·: · terials at a speed equal the speed of the material moving. The mudguard material was cut continuously to a length of 800 ram, to make a fender out of synthetic resin.

309815/0904

Claims (4)

■ τ 17 - claims 1. Mudguard, thereby leaning g e k e η η ζ e that it is in one piece from one of three layers The existing structure consists of a channel-shaped Has cross-section, 'and a layer of a non-transparent Synthetic resin with high rigidity and temperature resistance, a layer of a metal foil that is on the surface of the synthetic resin layer is applied, and comprises a layer of a transparent synthetic resin which has good weather resistance and is applied to the surface of the metal foil layer, 2. Mudguard according to claim 1, characterized in that the non-transparent synthetic resin layer is a reinforcing material includes. 3. protection plate according to claim 1, characterized in that one or more protrusions continuously or intermittently are provided in the longitudinal direction on the surface of the transparent synthetic resin layer. 4. A method for producing a protective plate according to any one of the preceding claims, characterized in that a nontransparent synthetic resin is continuously extruded from the mouthpiece of an extruder in a ribbon form that a metal foil is continuously applied to the entire surface of the tape-shaped synthetic resin that the metal foil layer is covered with a transparent, synthetic resin film to make a three-layer composition- ■ to produce the existing structure as one piece that the structure consisting of three layers is fed to a porm matrix and to a mudguard material with a channel-shaped cross-section 3O9fl ^; t "57b9'oV '""""" is processed that the material solidifies and into a Bending device is guided to make it in its longitudinal direction to bend to a predetermined curvature, and that it I slept to a predetermined length by a cutter is cut. Process for the production of a protective sheet according to one of Claims 1 to 3, characterized in that it is continuous a nontransparent synthetic resin is extruded from the mouthpiece of an extruder in a ribbon form that at the same time a metal foil is continuously fed into the extruder opening of the extruder and onto the surface of the tape-shaped synthetic resin is applied that continuously a film made of a transparent synthetic resin is fed from another extruder and onto the metal foil layer is applied to produce a three-layer structure in one piece that of three layers existing structure fed to a molding die and a mudguard material with a channel-shaped cross-section is processed that the material is solidified and fed to a bending device to make it in its longitudinal direction to bend to a predetermined curvature, and that it is finally cut to a predetermined one by a cutting device Length is cut. 3Q9815 / 0904 Le e rs e i ί e