DE1172030B - Method and device for deforming a film made of thermoplastic material in the manner of stamping - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: B 29 c

German KL: 39 a2 - 17/02

Number: 1172 030

File number: Y 441 X / 39 a2

Filing date: September 7, 1960

Opening day: June 11, 1964

The invention relates to a method and a device for production in a continuous operation a film made of thermoplastic material that looks like a carpet or plush.

A device has become known by means of which a matting on the surface of a Plastic film is to be generated. Here, the preheated film is applied by means of a pressure roller fed to a forming roller which is immersed in a bath. Both rollers are covered with rubber equipped, and the bath liquid wets one of the rollers to create a matt finish on the underside of the To prevent slide. With this device is a method for the production of velvet or plush-like Goods made of plastic cannot be carried out.

In another known device, a heated forming roller is dispensed with and the one to be processed The material is heated before it reaches the cooled roller and when it enters the cold one Form roller deformed. Such processes can only be used for pure embossing processes, it is but impossible to achieve deformations like those for a plush or carpet-like product are needed.

According to the knowledge according to the invention, this is only possible if the preheated film is initially applied meets with a hot part of the forming roller, whereupon it immediately afterwards when it is still on the roller, is cooled at least on the deformed outside. Afterward the entire film is then cooled, pulled off and wound up. It is useful here to use the inlet point to attach the film above the cooling device and, if necessary, the removal of the film from the forming roller within the cooling bath.

Furthermore, the invention extends to a novel device for performing the method, as characterized above, in which the forming roller provided with a surface profiling immersed in a cooling bath and the roller contains a heating medium in its cavity. The surface profiling consists of closely spaced conical or pyramid-shaped depressions, whose length is a multiple of their diameter.

In addition, the device also contains means for heating and cooling between the rollers continuous slide.

In the drawing, the invention is shown for example, namely shows

F i g. 1 is a side view of the new device with some parts shown in section,

Method and device for deforming
a film made of thermoplastic material
according to the type of embossing

Applicant:

Yamanashi Kasei Kogyo Kabushiki Kaisha,

Yamanashi-ken (Japan)

Representative:

Dipl.-Ing. W. Gollung, patent attorney,

Frankfurt / M., Kaiserstr. 16

Named as inventor:

Unokichi Takai,

Tsunekatsu Ishiyama, Kofu, Yamanashi-ken

(Japan)

Claimed priority:

Japan November 27, 1959 (37 230)

Fig. 2 is the same view in which still further Parts are shown in section,

Figure 3 is a front view of the device with some parts omitted and others in section are shown,

Fig. 4 is an enlarged partial section through the Forming roller,

FIG. 5 is a plan view of the part of the forming roller according to FIG. 4,

Fig. 6 is a partial view of one of the novel Device manufactured item of goods on a greatly enlarged scale and in a perspective representation.

The device 10 consists of a machine frame 12 in which a trough 14 is mounted for receiving cooling liquid.

The forming roller 16 is mounted with its shaft 18 in the bearings 20 on the frame. The shaft 18 is tubular and is connected on one side to the inlet pipe 22 and on the other side to the outlet pipe 24. The roller 16 is arranged in such a way that it is partially immersed in the liquid in the tub 14.

A pair of bearing arms 26, on which the counter-pressure roller 28 is mounted, is attached to the machine frame 12 in the region of the forming roller. This has a shaft 30 which is mounted in the bearing blocks 32

409 599/29?

is, which in the longitudinal slot 34 of the arms 26 ver roller 16 and reaches the stripping roller 52 and slide and slide under the action of finally to the pulley 54, from where they are to outwardly pressing springs 36 are available. The one located outside the tub, in the drawing position the roller 28 with respect to the forming roller 16 voltage not shown winding device took place by one with the bearing blocks 32 comes together. When guiding the film around the roller 16 Menacting screw, which is cooled by a handwheel 40 through the water 66 and the can be operated. Foil material solidified here. The carrier 76 of the

On the outer periphery of the rollers 16 and 28 is the goods solidified first and then the

a heating element 41 attached. This consists of projections-bearing side. The outside of the roller

a hood 42, which has a number of heating elements 16 inside it is temporarily slightly below the soft point of the

elements 44 carries. The heating elements can be cooled by any foil material, but then again on the ground

be designed, for example infrared rods of the steam are heated inside the roller,
used. In the example described, in the area in which the film 72 against the

Ceramic rods 46 application, which is pressed with a counter-drum 16, the outer surface of the

Stand wire winding 48 are surrounded. The counter roller is heated a little above the soft point of the film,

Stand wire 48 is connected to a source of electrical power, then the carrier side 76 of the film

which is not shown in the drawing, connected. rapidly cooled by the spray head 62 while

In addition, the other side of the film on the machine frame 12 cools down more slowly

half of the roller 16 extending downward and solidified.

Arms 50 attached, in which the rollers 52 and 54 20 The temperature on the surface of the roller 16

with their shafts 56 and 58 are mounted. The whale is around 170 to 190 ° C, if with a vinyl

zen 52 and 54 are immersed in the liquid in the tub chloride foil is used. The inside of the man

14 a. On one side of the machine frame means 68 has a temperature of about 150 ° C.

- shown on the right of the drawing - is a In the area in which the roller 16 and the

Tube 60 is arranged with a spray head 62 which is in contact with the water 66 in the 25 film

Area of the roller 16 is located. At the upper end of the the temperature is around 100 ° C.

Tub 14 has a drain pipe 64 attached to it. A suitable plastic for the present

desired liquid level 66 in the tub 14 purpose, for example, the following combination

to keep. Have settlement:

The roller 16 is hollow and consists of a man-30

tel 68, which can be about 10 to 20 mm thick. On vinyl resin 10 kg

the outside of the jacket carries a large number of octyl phthalate 40 kg

butyl phthalate 10 kg from closely spaced recesses

or wells 70, the conical, pyramidal octylagipate 15 kg
or can be designed similarly. The depressions 70 have a depth about 10 to 20 times greater, lead stearate 15 kg

than the largest diameter. The ratio of tin laurate 0.7 kg

Diameter to length is determined by the softness Pigment Q. S.

and flexibility of the surface of the goods is determined,

depending on whether a velvet, plush or carpet 40 A sheet of this material with a width of one meter

like goods are required. With fine, short front and 2 mm thickness runs at about one speed

jumps that are roughly hair-like, it is a speed of 3 cm / min through the machine, whereby through

Velvet-like goods, while a pressure of 130 kg / cm ^{2 is} exerted by the long, thicker one and the roller 28

stiffer thread-like protrusions become carpet-like. The pressure of the water, which is about 4 ° C

Character is generated. 45 exiting the spray head 62 is approximately 4 kg / cm ² ,

The process proceeds in such a way that a film 72 is made of while the bath temperature is about 10 ° C,

thermoplastic plastic over the counter-pressure under these conditions becomes a carpet-like

roll 28 is passed under the heating device 41, goods are produced, the thread-like pre-

making the material soft. This is where jumps 74 are about 3 mm long and one largest

the film in the area of the forming roller 16, which 50 have a diameter of 0.15 mm. If the

by steam at a temperature of 170 ° C, the surface of the roller 16 leaves the bath 66, has

is introduced into the roller through the tube 22, it a temperature of about 110 ° C, while

is warmed. The outside of the roller is raised to a temperature by the heating device

the heating rods 44 of the device 41 are heated. Which is increased by about 180 ° C, in that

Foil 72 then runs between rollers 16 and 28 55 instant in which it is in contact with foil 72

through, whose degree of softness, which is already touching. The lowest internal temperature in the

through the heating device 41 a certain amount of roller 16 is about 8 ⁰ C, while the highest at

has enough, now lies even further through contact with about 150 ° C.

the heated surface 68 of the roller 16 is increased in cases where the recesses in the will. Part of the film is very deep into the recess 70 60 roller surface, it is advisable to the roller, so that the hair or thread in the area in which the roller surface similar projections 74 on this side of the foil meets the foil, to a temperature develop. The remaining part of the film wall to be heated up, which is slightly higher than the flow temperature forms the carrier 76 of the goods. Thereafter, the temperature of the thermoplastic material runs so that the the film 72 past the spray head 62, from the 65 surface of the film facing the roller, Water at about 4 ° C. emerges, whereupon the film flows into the depressions 70. At the inner end the water 66 of the tub 14 is immersed. The film 72 of the depressions can lower the temperature approximately Moves here continue to correspond to the pour point on the surface or be a little deeper.

This ensures that the film material flows well into the depressions 70. If then the film comes into contact with the water of the spray head 62, it is cooled, and the hair or thread-like projections 74 begin to solidify at their base. When finally the The roller and the film are immersed in the bath 66, so are the projections on their entire surface Solidified length. You can produce very long and fine projections 74 in this way, so that a soft and elastically resilient surface of the film 72 is created. The goods described can produced quickly and continuously according to the method explained by the device described will.

The invention is not limited to the embodiment described and shown, but rather Various changes and additions can be made within the scope of the inventive concept be made.

Claims (5)

Patent claims: 1. Process for deforming a film made of thermoplastic material according to the type of embossing, wherein the film is preheated and one is immersed in a bath and has a surface profile provided forming roller is fed and then cooled, characterized in that that to achieve a plush or carpet-like embossing pattern, the preheated The film first meets a hot part of the forming roller, whereupon it immediately afterwards, preferably still on the roller, at least on the deformed outside cooled and then the entire film is cooled, pulled off and wound up. 2. Device for performing the method according to claim 1, characterized in that that the surface profile of the immersed in a cooling bath, a heating means in its cavity containing forming roller made of closely spaced conical or pyramidal There are depressions, the length of which is a multiple of their diameter. 3. Apparatus according to claim 2, characterized in that the forming roller on the peripheral area, seen in the direction of rotation, lies in front of the entry point of the film and from one Infrared heater is surrounded. 4. Apparatus according to claim 2 or 3, characterized in that the inlet point of the Foil is on the forming roller outside of the cooling bath. 5. Device according to one of the preceding claims, characterized in that the The drainage point of the deformed film is located on the forming roller within the cooling bath. Considered publications:
German utility model No. 1 726 536;
“Kunststoffe” magazine, issue 11/1960, pp. 357 and 358. 1 sheet of drawings 409 599/299 6.64 © Bundesdruckerei Berlin