JPS62268982A - Infrared drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an infrared dryer equipped with a working tube for guiding an expanded fiber strip material vertically through the material, the working tube being able to having at least the same width as the width of the strip of material and extending parallel to the plane of the heating wall as a component of the heating wall arranged parallel to the plane of the strip of material in the working tube; The radiator has a radiator that can be rotated individually or in groups around the radiator axis in the direction of exiting and retracting from the working tube and in the direction of re-entering the working tube, and the radiator is pivotable in the vertical direction. It relates to a type equipped with an air suction device that sucks air in the longitudinal direction of the working cylinder.

Prior Art This type of infrared dryer was first introduced on December 6, 1954.
Federal Republic of Germany patent application 8229, published on 0
90/82a, 34. In this known device, in order to avoid burning the articles to be processed, the radiator is arranged pivotably between two end positions and the radiated energy is transferred from the working position to the standby position. It is designed to be directed away from the item being processed. The emitter is cut off during the deflection turn. This is because each time the emitter is directed to the standby position,
If the radiator is operatively connected, the adjacent radiator or the surroundings of the machine will be undesirably heated. Therefore, when the machine is restarted, the acceleration of the web movement must be matched to the heating rate of the radiator if uniform process results are desired.

Patent application 822990/82 a of the Federal Republic of the ISO
, Ro4 or Federal Republic of Germany Patent Application Publication No. 146
The infrared dryer according to specification 06660 basically has the following features:
They are designed for either electrical heating or combustible gas heating.

Generally, infrared dryers are designed to use the optimum driving force at the installation location. For example, an infrared dryer may be powered by gas energy if gas is cheaper, since the costs of different types of energy can be very different at a given time or year and in different countries. If electricity is cheaper, it is economical to heat the infrared dryer with electrical energy. However, this requires considerable expense and/or assembly work to replace or replenish the entire machine or major parts of the machine.

OBJECTS OF THE INVENTION It is therefore an object of the present invention to provide a system which can be heated selectively by gas or electrical energy, and in which the exchange of energy forms can be carried out during mechanical operation.
To provide an infrared dryer.

Means for Solving the Problem According to the present invention which solves this problem, each radiator has a gas radiation surface heated by gas and an electron radiation surface heated by electricity. The radiating surface of the radiator can be replaced by pivoting the radiator around the radiator axis with a heated wall.

Effects and Effects According to the invention, one type of energy used for heating can be exchanged for the other type of energy by pivoting the radiator during the mechanical drive. Moreover, this rotation of the radiator is instantaneous. This is because the radiating surface, which is loaded with new energy in each case, is already preheated outside the working cylinder, so that when it is swiveled into the working cylinder,
This is because the radiant energy necessary for driving can be immediately radiated. Another advantage of the invention is that the radiator is constructed and pivotable in such a way that, when the machine is stopped (the strip material is stopped), the radiating surface in the respective operating position can be swiveled out of the working tube. is supported, thereby avoiding overheating or combustion of the treated article.

Embodiment The average radiation direction of each of the two radiation surfaces is about 1800
Alternatively, forming an angle of 90° with respect to one another is advantageous for pivoting or exchanging the radiating surfaces and possibly for pivoting the two radiating surfaces out of the working tube. Pivoting movement means that the radiation surface can be exchanged by being rotated through 90° or 1800° on the heated wall in the working cylinder.

Each radiator advantageously has at least one sixth wall, which is provided with heating means, for example by a further rotation of 90°, into a heating wall. Not yet. This "cold" side of the wall, which is not provided with heating means, is advantageously forced to pivot into the working cylinder when the strip of material has stopped.

Even in the standby position when swiveled out, each radiating surface can be preheated with full energy, or the heating that had taken place before swiveled out, can be continued without any adverse effects on the surrounding or adjacent radiators. According to another embodiment of the invention, each heating wall is adjoined on the outside by an external cylinder extending approximately parallel to the working cylinder, so that the radiation can be emitted in a gradually decreasing manner, and the radiation surface is It is adapted to be directed into the external cylinder during preheating or during gradual cooling.

According to another embodiment of the present invention, the outer cylinder or
The mechanism for pivoting the radiator is assigned switching means for switching the suction air to the working tube or to the outer tube, which in each case has a radiant surface that has been heated prior to pivoting. This is convenient for deriving the free energy. Also advantageously, the switching means for switching the suction air flow are connected to the means for pivoting the radiator. This structure is particularly advantageous in that the radiator is automatically pivoted out of the working tube when the strip of material is stopped, and the radiator or preheated radiation surface is forced to re-enter the working tube when the machine is restarted. , this radiating surface is suitable for constructions in which it is operated at full capacity W-, and thus the machine is operated at full speed.

Embodiments Next, the structure of the present invention will be specifically explained with reference to embodiments shown in the drawings.

FIG. 1 shows a schematic view of a combined gas-electronic-infrared dryer in section at right angles to the plane of the strip of material 1 to be dried. A strip of material 1 is drawn off in the direction of the arrow 2, ie approximately vertically from below to above, for example from a pressing mechanism 3, through a vertically extending working tube 4 and transferred via guide rollers 5 to another operation. supplied to the location. The surface of the working tube 4 that extends parallel to the plane of the strip material 1 is configured as a heating wall 6 in which a radiator axis that extends parallel to the plane of the heating wall 6 is arranged. radiators 8 that are rotatable individually or in groups at least about 90° about 7;
is included. Furthermore, the working tube 4 is provided with an air suction device including a suction box 9 for sucking and guiding air sucked in at the lower end of the working tube 4 in the direction of the arrow 10. Each radiator 8 has a gas radiator 11 (gas radiation surface) that is heated with gas and an electron radiator 12 (electron radiation surface) that is heated with electrons.

By rotating each radiator 8 about 1800 degrees around the radiator axis 7, the gas radiator 11 and the electron radiator 12 are
are exchanged within the heating width 6 shown in FIG.

According to the present invention, a working cylinder 4 is further provided on the outside of each heating wall 6.
Adjacent is an external cylinder 13 that extends parallel to the cylinder. The outer cylinder 13 is equipped with an additional or switchable suction device, which allows the surface of the gas emitter 11 or the electron emitter 12, which has been swung out of the working cylinder 4, to be removed from the outer cylinder 1 after being cut off.
It can be cooled down gradually over a range of 3 or can be driven further at full power without affecting any parts of the machine. For this purpose, the suction box 9 can be selectively or additionally switched also to the external cylinder 13, so that the suction operation is carried out in the direction of the arrow 10 by means of the suction hole 14 at the bottom of the working cylinder 4. ,
Or, by the suction hole 15 at the bottom of the external cylinder, in the direction of the arrow 1.
It will be held at 6. For example, each mechanism for rotating the radiator 8 may be provided with a switching means for switching the suction air flow to the working tube 4 or the outer tube 13, each of which has a radiation surface that was heated before being rotated. can be assigned.

According to a further embodiment of the invention, it is advantageous if the embodiment shown in FIG. This additional 90° pivoting movement avoids the risk of overdrying or burning when the web is at rest.

This is because the gradually weakening radiation of the radiator 8 is no longer directed into the working tube 4 but towards the adjacent outer tube 1.
This is because it is directed towards 3.

In this case, it is particularly advisable to cut off the full power suction operation in the outer cylinder 13. Also, the radiation surface required to further drive the infrared dryer (after starting the machine) is
It is preheated at full power in the outer cylinder 13, that is, before it is pivoted into the working cylinder 4. When the machine is stopped for a short time, each radiation surface is (temporarily) closed to the outer cylinder 13.
It can also be loaded with energy unchanged while being pivoted into the interior.

In the embodiment of FIG. 1, the radiation surfaces of each radiator 8 are located in mutually parallel planes. Therefore, the radiation direction of the gas radiator 11 and the radiation direction of the electron radiator 12 are 1800 degrees apart from each other.
form an angle. To exchange one emitting surface with the other requires a rotation of approximately 180°. In the embodiment shown in FIG. 2, the plane of the gas radiator 11 and the plane of the electron radiator 12 are arranged perpendicularly to each other, so that the two radiation directions form a 90° angle with each other, and one energy source is A rotation of approximately 90° about the emitter axis 7 is sufficient to switch to the other energy.

According to the embodiment of FIG. 2, the radiator 8 also has a cooling surface 17. This cooling surface 1, together with the surface of the gas radiator 11 and the surface of the electron radiator 12, forms a column with, for example, a rectangular or hexagonal cross section, so that when the strip material is stopped, the gas radiator 11 and the electron radiator 12 The heating wall 6 is closed by the cooling surface 17 at the same time that the working cylinder 4 is also pivoted into the adjacent external cylinder 13 . For the rest, FIG. 2 mainly shows a schematic diagram of one half of a combined gas-electronic-infrared dryer, the details of which correspond to the device shown in FIG.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the invention with two different types of radiation surfaces.
A schematic vertical cross-sectional view of an infrared dryer according to an embodiment,
FIG. 2 is a schematic vertical partial sectional view of an infrared dryer according to another embodiment of the invention. 1... Band-shaped material, 2... Arrow, 3... Squeezing mechanism, 4
・・・Work tube, 5...Guide roller, 6...Heating wall,
7...Radiator axis, 8...Radiator, 9...Suction box, 10...Arrow direction, 11...Gas radiator,
12... Electron emitter, 13... External cylinder, 14.15
... Suction hole, 16 ... Arrow direction, 17 ... Cooling surface Fig. 2

Claims (1)

[Claims] 1. An infrared dryer equipped with a working tube (4) for vertically guiding the expanded fiber strip-like material through the material, the working tube (4) Strip material (1)
has at least the same width as the width of the working tube (4);
A heating wall (6
), respectively individually or in groups around the radiator axis extending parallel to the surface of the heating wall, in the direction of exit from the working tube (4) and this working tube (4).
In the case of a type in which a radiator (8) is provided which can be pivoted in the direction of re-entering the workpiece, the radiator (8) is equipped with an air suction device for sucking air in the longitudinal direction of the vertical working cylinder, Each radiator (8) has a gas radiation surface (11) heated by gas and an electron radiation surface (11) heated by electricity.
2), and the radiation surface of each of these radiators (8) is heated by rotating the radiator (8) around the radiator axis (7) with the heating wall (6). An infrared dryer characterized by being replaceable. 2. An infrared dryer according to claim 1, wherein the average direction of radiation of each of the two radiation surfaces (11, 12) makes an angle of approximately 180° or 90° with respect to each other. 3. Adjust the radiator (8) to 90° or 180° with the heating wall (6)
3. The infrared dryer according to claim 1, wherein the radiation surface is exchanged by rotating the dryer. 4. Any one of claims 1 to 3, wherein an external cylinder (13) extending substantially parallel to the working cylinder (4) is adjacent to the outside of each heating wall (6). The infrared dryer according to item 1. 5. The mechanism for rotating the radiator (8) includes suction air into the working cylinder (4) or external cylinder (13), each of which has a radiation surface (11 or 12) that was heated before turning. 5. The infrared dryer as claimed in claim 4, further comprising switching means for switching the flow of water. 6. The switching means for switching the suction air flow,
Infrared dryer according to claim 5, which is connected to means for pivoting the radiator (8). 7. By stopping the strip material, the radiant surface which is heating each time is automatically swiveled out of the working cylinder (4), and when the machine is restarted, the radiant surface ( 1
Infrared drying according to any one of claims 1 to 6, wherein the infrared drying device is provided with a turning mechanism for automatically entering and turning the parts (1, 12) into the working tube (4) again. Machine. 8. The swiveling mechanism is provided with means for preheating the radiation surface (11, 12) which is to be swiveled into the working tube (13) in each case. Infrared dryer.