DE1579218A1 - Device for supplying heat - Google Patents

Description

DR. F. ZUMSTEIN - DR. E. ASSMANN - DR. R. KOENIQ8BERQER P AXjUiT A N W A LT E

T.LEFON: M.47 « ^ **** \ I MONOHS 8.

POOTaCHCCKKQIfMfiSoNCHEN βΐ

Dunlop Rubber Company Limited, Birmingham / England

Device for supplying heat.

The invention relates to a device for the delivery of Heat, and in particular a heater with a bed of fluidized solids, -4

According to the invention, the device for the delivery of Warm a bed of blown petroleum and a heating chamber, which is arranged in the immediate vicinity and is connected to it and is kept at a! temperature,

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which is essentially the same as that of the fluidized solid.

The invention also relates to a method for vulcanizing rubber with .dem a composition non-vulcanized rubber in the device on delivery is heated by heat until vulcanization is finished.

The ^ eizkamraer should be arranged so that the to be heated Object, as it is passed through the bed of fluidized solids, placed in the heating chamber can be without the temperature is noticeably reduced. The heating chamber is therefore in the immediate vicinity Attached near the bed of suspended solids and they can be made from one part with the container of the bed be formed or arranged separately therefrom. In the latter case, however, the distance between the surface of the whirled up solids and the inlet to the heating chamber must be dimensioned so that there is little or no heat Object is dispensed while being moved from the bed into the chamber. The chamber can be vertical or horizontal with respect to the surface of the bed from being whirled up Solid, or it may be inclined to do so ·.

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The expression "fluidized solid" is intended to mean a layer of small particles of a pesticide through which a stream of gas or vapor is conducted with such speed and eoloher distribution is that the particles are kept in suspension and can move freely. A bed made of such a material causes rapid heat transfer to or from the objects immersed therein. Pesticides for Suitable fluidized beds to be used according to the invention are e.g. sand, ballotini (small Glass balls), small aluminum balls and hot-blown ones

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Materials such as' e.g. available under the hat "Blaetyte" are. The pesticide particles should have a diameter or cross section of generally less than 0.5 mm but not less than 50 microns.

The bed of the fluidized pesticide is in a suitable one Container and this container can with a device for heating the container walls or after a another embodiment provided with heating elements no, which are immersed in the bed. Of the. Container is down awarded with a facility that is responsible for a uniform

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.gen provides gas or steam flow, with, for example, inert gas over its surface or, according to another embodiment, a reactive gas, for example sulfur dioxide, can be used. A / suitable device for distributing the gas or steam can consist of a porous brick, e.g. of ceramic material or of internal, stainless steel, which fulfills a double purpose, namely acts as a support for the bed and divides the fluidizing medium flowing through the brick into the bed. Other dividing and supporting means, for example filled beds or shelves or plates made of porous metals, can also be used.

The temperature of the heating chamber is'; substantially equally kept high as the dea fluidized solids ·· and preferably the H _e is thereby heated izkammer that the entire fluidizing medium is passed through, for example, "the gas during its exit from dan bed of fluidized Peststoff It can, however, also include additional or other means for warming the heating chamber can be provided, and these means expediently consist of electrical heating elements which are installed inside the heating chamber.

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chamber and they can be advantageous can be used solely to heat the chamber or they can be used in conjunction with the emerging, fluidizing medium of the bed with additional heating devices, represents the most economical form of heating the chamber and on in this way a regulation of the temperature dtr chamber can be easily reached «Other forms Ton Hei * · Devices for the chamber can be used in addition to the devices already described and these additional devices can consist of snakes or The Kaaaer were led around or ringajum pipes be arranged inside the chamber and through which a heating medium circulates.

The apparatus of the present invention for providing heat is particularly useful in the vulcanization of chewing chewing compositions. Such compositions that consist of natural or synthetic rubbers can, which with filling material, with vulcanization additives, Antioxidants, retarders of vulcanization and

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Extending oils can be mixed, are usually made by mixing the ingredients in an open or closed mixer. The ones so preserved Compositions are then molded by suitable means and the molded articles so formed are then vulcanized. The special form of the heating device designed according to the invention is, it does not allow an extruded or too Plates calendered rubber composition easily and

can be vulcanized quickly, although individually shaped objects can also be vulcanized with the device according to the invention, if desired.

The following are three preferred embodiments of the device according to the invention and its use in vulcanizing rubber on the basis of the enclosed Drawing explained in the

Pig. I represents an elevation through one embodiment of the door direction.

Fig. II is an elevation through another embodiment of the device and only partially shown

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Pig. III is an elevation of a further embodiment of the device according to the invention.

The heating device "beetfeht" shown in Pig * I essentially consists of a vertical cylinder-I ₁ through which the plate 2 of a rubber composition is guided upwards. A device by which the plate is drawn up through the cylinder is provided , and

theKP t in the direction expediently consists of a roller 3, η

which is arranged vertically above the cylinder and over which the plate is guided. The lower end of the cylinder is closed at 4, but is provided with an open tube 5, which passes through this closed part 4 »coaxially is led to cylinder 1, through which the plate :. 2 is fed to the cylinder. This open tube 5 ends in short distance from the bottom of the cylinder to the top Surface of a porous brick 6, which is fitted into the cylinder, with the solid 7 being whirled up is to be carried by this brick. The tube 5 also protrudes from the lower closed end 4 of the cylinder 1 a short distance before. A chamber 8 is therefore closed between this porous brick 6 and the lower one End 4 of the cylinder. 1 is formed and the Kammezj8 is with

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equipped with an inlet opening 9, through which a heated gas is passed, which is not opydierend and is inert to the rubber composition, the suspension of the pesticide 7 by this gas is effected. If necessary, a gas can also be used reacting with the rubber composition.

The depth of the solid 7 in the fluidized state is dimensioned so that the rubber compound meeting the Vulcanization temperature reached at the moment in which it rises to the surface of the pestilent matter arrives, and the length of the cylinder 1 over the surface of the pest matter whirled up 4 · the so the Hei * - Chamber 10 forms is dimensioned so that the rubber composition at the moment of its exit from the upper End of the cylinder that is fully vulcanized.

Three pairs of electrical heating elements 11, 12 and 12 are housed inside the cylinder.These pairs of elements are arranged so that one pair 11 is immediately adjacent to the top surface of the porous brick 6 and inside the pesticide 7 to be suspended, while the other two pairs 12 and 13 «wipe

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the upper surface of the solid 7 and the upper end 14 of the cylinder 1 are attached so that the

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Heating chamber 10 is heated · The elements of each Pairs of heating devices are on opposite sides Sides of the rubber plate 2 attached.

The at the lower end 4 provided for the cylinder 1 tube 5 (^ is internally provided with baffle plates 15 or other means, is through the vermJuien that the aufzuwirbelnde Peststoff * 7 n to unte /. Exits through the pipe 5 when d'ie This seal must allow the rubber composition to move freely through the pipe 5 while at the same time providing a sufficient seal so that the pesticide that is thrown up cannot flow downwards

During operation, a hot, inert gas is introduced into the ΖίΜΛΤ 8 at the lower end of the cylinder 1 and it passes through the porous brick 6 and the Ie · totoff medium · 7 | whereby this solid is whirled up. The htlfl gas enters the surface of the fluidized solid and into the heating chamber * 10, which is located above the pesticide, and then flows through the upper part 14

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of the cylinder to an outlet port 16 provided at the upper end. The three pairs 11, 12 and 13 of the heating devices are in conjunction with the hot Gfaa is used to keep the temperature of the fluidized test material at vulcanization temperature brought and the temperature of the heating chamber 10 is kept at this temperature. The KautechukEueaaeicke, the dftrch mixing of the ingredients by means of a suitable device was prepared, is then passed through an extruder 17 and to a The endless strand is then pressed through the lower tube 5 and through the fluidized bed and the heating chamber 10 and convey the upper orphan 3 is withdrawn from the cylinder 1 «While the composition is through the bed from swirled Testatoff is performed, their temperature rises rapidly to Vulkanieierung temperature and the Vulcanization is complete when the composition is passed up through the heating chamber so that a ' vulcanized composition from the top of the cylinder 1 exits

With this arrangement of fluidized bed and Heiikaneer: tanm the fluidized bed would run strongly in the same way iu a «

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Proceedings in which there is no Eeiekammer is used .. The method is therefore economically advantageous as beds with suspended pesticide are expensive to manufacture and since such a bed must be much deeper without the use of a hot chamber, a fieaaattief must actually be used,

the same as those of the heating chamber and bed i «t _# M

In another embodiment of the vulcanization process for a rubber composition, as shown in Fig. 11, the fluidized bed 7 and the heating chamber 10 are arranged in a corresponding manner, except that the heating chamber is a short distance away from the upper surface of the fluidized solid is. An additional pair 18, 19 of electrical heating elements let at the lower end 20 of the heating chamber 10 Λ

accommodated “In this process, only a part is placed of the fluidizing medium is used to heat the chamber 10 and the resulting temperature loss is compensated for by the additional pair of heating elements

In another embodiment of a vulcanization process for a rubber compound described in Pig · III

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As shown, the fluidized pesticide 30 is held in a rectangular or otherwise shaped pan 31 which has a downwardly curved lower surface 3 €, at the center of which an inlet opening for the heated inert gas is provided 30 is held on a porous brick 34, which is provided on the pan 31. Bine Heiskamner 35 extends in the horizontal direction outwards from the pan 31 and is provided with an inner heating device 36 and an upwardly directed train 37, ao that the whirling medium can escape at the extreme end of this chamber. The pan 31 and the inlet 38 to the H _e izkammer 35 are covered with a lid 39, so that the fluidizing medium after the it has exited from the bed of fluidized Peststoffes 30, flows through the heating chamber 35 "A Einrichinong for conveying a from a chewing board 40, through the bed of fluidized pesticide 30 and through the heating chamber 35 are provided and this means is conveniently made up of rollers. In operation, a plate 40 of a rubber composition is continuously fed by an extrusion press through an opening 42 on the side of the pan Jl above the

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Surface 43 of the fluidized pesticide, passed over a roller 44 and into the bed of fluidized pesticide 30. The sheet 40 made of a rubber composition is then moved horizontally by means of rollers 45, 46 through the belt; and also led to the bed in the hot chamber 3 *. As the plate -40 is passed through the bed, the temperature M rises

at vulcanization temperature and c ¹ the tulkanieierung is ended by the fact that the plate is passed through the heating chamber 35. When leaving the fireplace, the plate is rolled up to form a hollow 47. The bed of swirled up pesticide is heated by the hot, inert gas and by an electric resistance heater 48 that is immersed in the bed. The chamber 35 is equipped with a thermometer 49. The length of the heating chamber is dimensioned so

that the vulcanization is finished when the plate ^ material escapes from the chamber, if desired the heating chamber can be mounted vertically or inclined to the surface of the fluidized test substance, such as this is indicated by the two dashed lines 50, 51.

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The heating device can also be vulcanized individually molded rubber articles that are used on a conveyor belt through the bed of the thrown up pest and passed through the heating chamber.

The heater is useful for vulcanizing of consisting of a rubber composition applied panels, such as those used for floor coverings, drive belts and hoses and such objects will.

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Claims (1)

Claim 1. Device for supplying heat, characterized by a bed of fluidized solids and a Haimkaaaer, which is placed in close proximity to and in connection with the bed and is kept at a temperature essentially equal to that Temperature of the suspended solids is. 2. Device according to claim 1, characterized in that that the Heizkaosaer is arranged vertically to the surface of the fluidized solid. 5. Device according to claim 1, characterized in that that the Heizkasuaer is mounted horizontally to the surface of the fluidized solid. 4. Device according to claim 1, characterized in that that dl heating ducts inclined to the surface of the »009831/0300 ßAD ORIG / nal swirled solid toffee is appropriate 5 · Device according to one of the preceding claims, characterized in that »a device This chamber is to be heated up 6 »Device according to claim 5, characterized in that» that this facility electrical heating elements around ~ fftMi. 7. Device according to one of the preceding claims, characterized in that the Heiskaomer from a part with the container for the whirled up solids. 8. Device according to one of claims 1-6, characterized marked, daae the Heizkamaer a short distance sound the container for the whirled up Has solid. 9 * device according to claim 7 or 8, characterized thereby- » BATH 009831/0300 indicates that the container for the fluidized solid contains a vertical pipe which has a porous brick transversely inside and in the vicinity of the lower part of the rohrea , and that an inlet for a gas is provided in this pipe under this brick 10. Apparatus according to claim 7 or 8, characterized in that "I think the container has a pan, which have a poyusen brick across their base and that an inlet for a gas is provided for this lower part. 11 «Device for vulcanizing rubber, characterized by a bed of fluidized» solid »a heating chamber in the immediate vicinity and in connection with this bed, which is kept at a temperature essentially equal to the temperature of the fluidized solid, through an inlet fc ^r • in gas, through a further inlet for the «su vulcanizing lautaohukaueaaeensetung and duroh a · device through which this« lauteohukemeaÄneneet- BATH ORIGINAL 009831/0300 tongue se ag through this bed of whirled up solids and through the hikers is pulled " 12 · Process sum vulcanizing rubber, thereby characterized that a vulcanizable Kauteohukzuaajaaeneetzune as long as a heated Bed of fluidized solids is passed until the gunn — enwetgung to vulcanization temperature "voxwftf this final resolution is due to one Heiakaamer, which is in the immediate vicinity » and is placed in connection with this bed and is kept at a temperature which is substantially equal to the vulcanization temperature, whereby the Srväramg is continued until the vulcanization is finished. 13 »The method of claim 12 'characterized in that the _e solid by vapor passed therethrough aufc" is swirls · 009831/0300 · The method according to claim 12 or 13, characterized in that the preparation in Fora squeezed out of a plate and conveyed a whale · guided through the bed and the Helskamer will. 15 Vulcanized rubber, produced according to one of claims 12-14 16 · Vulcanized rubber, manufactured by intermediary a device according to one of claims 1-11 BAD OR ₁ ¹ GfNAL
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