JPH03221100A - Iron device and its operation - Google Patents

Abstract

PURPOSE: To easily prevent ironing temperature from exceeding a specified critical temperature corresponding to fibers by forming one of pressing plates into a void body opened in the direction of the opposing pressing plate, covering an open part with a heat resistant material and providing a suction pipe further. CONSTITUTION: An upper pressing plate 1 is the void body and is not provided with heat. The void body is provided with the suction pipe 4 on the upper surface and the suction pipe 4 is connected to a vacuum pump as indicated by an arrow 5 (steam). The void body itself is covered with a cover 2 in a grating shape formable by the heat resistant plastic material or a fiber grating cloth respectively resistant to the heat and deformation. Thus, an iron temperature is easily prevented from exceeding a specified critical temperature corresponding to the fibers to be handled.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an ironing device having upper and lower press plates and a method of operating the ironing device.

BACKGROUND OF THE INVENTION Conventionally, ironing devices have upper and lower press plates, between which mutually opposed ironing surfaces the object to be ironed is inserted.

Upon opening of these press plates, the fibers to be ironed are exposed to high pressure and relatively high temperatures.

Ironing pressure and pressing time are adjusted depending on the fibers being handled. The press plate is usually steam heated and the material being handled is also exposed to the hot steam.

Problem to be Solved by the Invention Modern fibers such as yarn, wool, linen and viscose contain synthetic fibers or are composed exclusively of temperature-sensitive synthetic fibers and/or often Since plastic materials or synthetic resins or at least finishing materials containing such components are also used, these fibers can be damaged if exposed to high temperatures during the steam iron. Therefore, in general, the critical temperature range begins at 130'c. This temperature is easily reached and even exceeded by heated steam. For technical reasons, it is very difficult to influence and control the temperature to which the ironed fabrics are exposed. Despite the fact that exceeding the critical temperature for a particular textile material can almost instantaneously destroy or at least break the fiber, which requires very fast and precise measurement and control over temperature. However, controlling the steam pressure and/or steam temperature in an appropriate manner is very complex. Standard ironing equipment requires a relatively large amount of electrician energy to produce the steam and heat.

The object of the invention is to ensure in an ironing device with upper and lower press plates that the ironing temperature does not exceed a certain critical temperature in a simple manner, depending on the fibers being handled.

(Means for Solving the Problems) The ironing device of the present invention has upper and lower press plates, at least one of the press plates is a hollow body that opens in the direction of the opposing press plate, and The opening facing the press plate is covered with an air-permeable heat-resistant material, and one of the press plates is further provided with a suction pipe, thereby achieving the above object. .

The hollow body may be either the upper press plate or the lower press plate, or both.

The hollow body is provided with an intermediate layer of air permeable foam material.

The material of the cover is a plastic coating;
Alternatively, it is a lattice-like or porous metal sheet with a surface protective coating of foam or fiber material. The cover is electrically heatable.

Preferably, the upper and/or lower press plates, which are lined or covered in whole or in part by a permeable foam, are provided with porous tubes for releasing and supplying steam.

Furthermore, the upper and lower press plates are each additionally provided with a small tube through which steam can be selectively or additionally supplied or absorbed.

The hollow body is provided with sensors for steam, temperature and/or pressure, the measured values of which are fed to electronic control means for presetting the steam supply, temperature and/or pressure.

The press plates can be moved toward and away from each other in a direction perpendicular to the ironing surface, or alternatively the press plates can be opened and closed by a rocking motion.

The space of the hollow body of the one press plate is made larger than that of the opposing press plate.

Further, the method of operating the ironing device of the present invention is such that, after the press plate moves in a direction perpendicular to itself and the supply of steam is started, the steam is applied to each material to be ironed. It is characterized by being absorbed by steam and continuing even when the steam supply is stopped.
This achieves the above objective.

Furthermore, the method of operating the ironing device of the present invention is characterized in that each steam is blown by said one press plate onto the material to be ironed between said press plates, and simultaneously or later absorbed by the opposing press plate. As a result, the above object is achieved.

(Function) In the ironing device according to the present invention, at least one of the press plates, for example, the upper press plate, is a hollow body that does not self-heat, and the portion of the upper press plate facing the opposing press plate, that is, the lower press plate, is , covered by a grid preferably formed of a heat-resistant plastic material or a porous material that can withstand deformation over long periods of time. While ironing,
Steam is provided only by opposing press plates,
Some of it is absorbed again as steam-saturated air by the hollow press plate, for example the upper press plate. By setting the respective amount of steam/air absorbed, the temperature to which the material to be ironed is exposed can be kept well constant. Furthermore, it is an advantage that more than 50% of energy can be saved with the ironing device of the invention.

(Example) The invention will now be described with reference to examples.

FIG. 1 is a schematic diagram showing the main parts of an ironing device according to the present invention. The upper press plate 1 is a hollow body and does not have heat. This hollow body has a suction pipe 4 on its upper surface,
This suction pipe 4 is connected to a vacuum pump (not shown) or similar suction system, as indicated by arrow 5 (steam). This suction pipe 4 absorbs some steam-saturated air. The cavity itself is covered at its open end facing the lower press plate by a lattice-like cover 2, which can be formed by a heat-resistant plastic material or by a fiber lattice cloth resistant to heat and deformation, respectively.

This cover 2 is also constructed of a permeable foam material that is adhered or laminated, and in any case
There must be good air circulation. Rust protection or plastics - for example, tetrapolyfluoroethylene (
If a metal grid coated with Teflon (trade name Teflon) or a material with a protective coating on its surface is used, this grid is electrically heated. Such additional heating is particularly advantageous in applying uniform heat to both sides of thick materials being ironed. The cavity of the upper press plate 1 is empty and, depending on the size and type of the material of the cover 2, can be filled by an air-permeable material 3 or a core material. Furthermore, the suction pipe 4 can be lined in whole or in part with foam.

The lower press plate 6 in FIG. 1 is conventionally designed and has a transparent surface or coating at its upper end facing the upper press plate 1, the shape of this surface or coating being
It coincides with the surface of the cover 2 of the upper press plate 1. These surfaces into which the material to be ironed is inserted may also be concave or convex. The hot steam passes through the perforated surface of the lower press plate 6 on which the material to be ironed is placed. The material to be ironed is placed on the lower press plate 6, as shown in Figures 5 and 6, respectively.
After both press plates have moved in their respective directions, the ironing operation is started by supplying steam 7 through the lower press plate 6 and by simultaneous evacuation of steam 5 through the suction pipe 4 of the upper press plate 1. By means of the discharge and the continuous hot steam generated thereby, it is possible to keep the temperature to which the material to be ironed is exposed constant within a narrow range. By adjusting the amount of air emitted in each case, it is possible to keep the temperature at a desired value, depending on the material to be ironed and in relation to the heat pressure supplied. In this way, heat build-up, which occurs particularly in thick or dense fibers, is prevented.

The advantage of the invention is that especially in a constant flow of steam,
In effect, more accurate and faster measurements and controls are possible.

For this purpose, an electrical temperature sensor can be arranged inside the upper press plate 1 or in the suction pipe 4. A constant flow of steam surrounding this electrical temperature sensor allows for fast and accurate temperature measurement and control.

In the experimental embodiment, the upper press plate l has a thickness of 2 m.
It was formed by a thin metal plate of 1.5 mm and had an overall width 2 mm wider than the lower press plate.

The suction pipe 4 is connected to an upper press plate 1 perpendicular to the surface of the cover 2 formed from a mesh-like plastic material (filter grid).
It protruded from the body of the. The suction tube 4 was lined with a 7 mm thick silicone foam layer. The inside of the filter grid was also coated with Norifun foam. Furthermore, the discharge was such that an adjustable delay with respect to the start of the supply of steam by the lower press plate 6 was obtained. Furthermore, after the steam supply is finished,
The release continued for a certain period of time, preferably 2 to 3 seconds depending on the material being ironed. Particularly good ironing results were obtained, with no traces of water remaining on the fibers to be ironed or on the upper press plate. There may be little or no heating of the lower press plate 6, so that labor costs of more than 50% are saved compared to standard ironing equipment.

In the embodiment shown in FIG. 2, the functions of the upper and lower press plates have been exchanged. This may be effective depending on the conditions of use or operation.

In the embodiment shown in FIG. 3, the upper and lower pressure plates are hollow bodies. According to this method, the steam can pass alternately in both directions. This method can be particularly advantageous for particularly thick or tight fibers. In this way, uniform heating of the material to be ironed is achieved, while at the same time overheating of the material to be ironed on the side opposite the supply of steam is prevented.

In the embodiment of the invention shown in FIG. 4, the upper and lower press plates are provided with porous suction guide tubes 8 which are fully or partially lined or covered by an air permeable foam material 9. . The respective arrangement of the holes 8a of the suction guide tube 8 allows the steam to flow particularly uniformly over the ironing surface. This is advantageous, for example, if the material to be ironed has a very high air permeability. Furthermore, lateral steam supply and discharge means (not shown in FIG. 4) are respectively provided so that the overall size of the ironing device is reduced.

FIGS. 5 to 7 show another embodiment of the invention, in which a canalicule 11.12 is further provided, through which steam 10 can alternatively or additionally be supplied or absorbed according to the reference numeral 13. An example is shown.

The embodiment shown in FIG. 7 corresponds to the embodiment of FIG. 4, except that the small tubes 11.12 are arranged in the upper and lower pressure plates. With this alternative or alternating steam supply, an improved surface effect and further conformability of the material to be ironed can be achieved. Alternative or auxiliary discharge 13 in addition to the tube for supplying steam
By small tubes or tubes 12 in the lower press plate 6 (FIG. 5) or in the upper press plate 1 (FIG. 6) used for
Further improved steam pressure and temperature control is possible.

The respective movement of the upper and lower press plates 1 and 6, in particular the lowering of the upper press plate 1 onto the lower press plate 6, can be effected pneumatically, hydraulically or electrically. Furthermore, the lowering can be done by vertical movement as in FIG. 8 or by rocking as in FIG. 9.

Control of these movements can be done electronically.

The entire ironing device, depending on the material being ironed,
For electronic (also computer-assisted) control, the upper and/or lower press plates can furthermore be equipped with sensors for steam, temperature and pressure. 10th complete operating system for such ironing equipment
It is shown schematically in the figure and briefly described below.

The upper press plate has horizontally arranged suction pipes 4 for steam 5, which suction pipes extend along the width or length of the upper press plate. The above embodiments (e.g.
4), the suction pipe 4 is covered with a heat-resistant foam material 9, in particular on the lower side, i.e. on the side facing the cover 2, so that the absorbed steam-saturated air can be ironed with relatively low fluid resistance. The suction pipe 4 is perforated so that the suction can be absorbed from the entire surface. The suction pipe 4 is provided with an electromagnetically controllable vacuum valve 23, which is activated by a microprocessor-controlled control device 15 depending on the temperature measured through a control line 18 by a temperature sensor 19. It is opened and closed through the control line 17. The electrical temperature sensor 19 is fitted with a humidity sensor (not shown), such that the control of the vacuum valve 23 is dependent on both the temperature and the moisture content of the air/steam mixture inside the upper press plate l. may be added. As can be seen with reference to the figure, the lower press plate 6 and also the upper press plate 1 are respectively provided with magnetic steam valves 14 and 13. As can be seen, by the control means 15,
Hot steam is introduced into the magnetic steam valve 14 and the lower press plate 6. The introduction of hot steam into the upper press plate 1 via the magnetic steam valve 13 is only necessary in exceptional cases as a supplementary measure, for example when ironing very thick materials.

The control lines extending from the control means 15 to the magnetic steam valves 14 and 13, respectively, are characterized by the reference numbers 20 and 16, respectively. In the embodiment of FIG. 10, like the embodiment of FIG. 1, the cover 2 is formed from a heat-resistant grid of deformation-resistant plastic material on its inside and a heat-resistant/reconstructed foam material covering the entire underside. A core material layer 3 is provided.

This foam layer 3 promotes uniform steam/air distribution and generates pressure steam. The foam layer 3 and the lattice-like cover 2 are held by a deformable frame that fits exactly on the bottom side of the upper press plate 1 and is fixed, for example by screws or snap-actions.

In the embodiment shown in FIG. 10, the upper press plate 1 is further provided with steam supplied to the hot steam cartridge by electrical additional heating means or (as shown) by means of small tubes 11 and 12, respectively. Auxiliary heating means 22 are provided, either in the form of steam discharged from a hot steam cartridge or a hot steam cartridge.

The lower press plate 6, on which the material to be ironed is placed,
In this case, it is a conventional design. Steam/air flow is indicated by arrows.

(Effects of the Invention) The ironing device and its operating method of the present invention can thus very easily prevent the ironing temperature from exceeding a certain critical temperature depending on the fibers being handled.

[Brief explanation of drawings]

FIG. 1 is a side view of the upper and lower press plates of the ironing device according to the invention, in which the upper press plate is a hollow body. FIG. 2 is a side view of the upper and lower pressing plates of an embodiment of the ironing device according to the invention, the lower pressing plates being hollow bodies; FIG. 3 is a side view of the upper and lower press plates of the ironing device according to the invention, both of which are hollow. FIG. 4 is a side view of the upper and lower press plates of the ironing device in which the upper and lower press plates are steam heated. FIG. 5 is a side view of an embodiment of the present invention in which steam is supplied in an explanatory manner through an upper press plate. FIG. 6 is a side view of an embodiment of the present invention in which steam is supplied in an explanatory manner through a lower press plate. FIG. 7 is a side view of an embodiment with interpretive steam supply in the upper and lower press plates. FIG. 8 is a schematic view of the upper and lower press plates moving vertically relative to each other. FIG. 9 is a schematic view of the upper and lower press plates moving relative to each other due to rotational movement. FIG. 10 is a schematic diagram of a complete operating system for an ironing device made in accordance with the present invention. l... Upper press plate, 2... Cover 3... Air permeable material, 4... Suction pipe, 5... Steam, 6...
- Lower press plate, 7...supply steam. that's all

Claims (1)

[Claims] 1. It has an upper and a lower press plate, at least one of the press plates is a hollow body that opens in the direction of the opposing press plate, and an open part facing the opposing press plate. An ironing device characterized in that the press plate is covered with an air-permeable heat-resistant material, and one of the press plates is further provided with a suction pipe. 2. The ironing device according to claim 1, wherein the upper press plate is a hollow body. 3. The ironing device according to claim 1, wherein the lower press plate is a hollow body. 4. The ironing device according to claim 1, wherein the upper and lower press plates are hollow bodies. 5. The ironing device according to any one of claims 1 to 4, wherein the hollow body is provided with an intermediate layer of an air-permeable foam material. 6. The ironing device according to any one of claims 1 to 5, wherein the material of the cover is a grid-like or porous metal thin plate having a coating of plastic material, or a surface protective film of foam material or fiber material. 7. Claims 1 to 6, wherein the cover is electrically heatable.
The ironing device according to any of the above. 8. Any one of claims 1 to 7, wherein the upper and/or lower press plate, fully or partially lined or covered by a permeable foam material, is provided with porous tubes for the release and supply of steam. Ironing device described in Crab. 9. The upper and lower press plates are each additionally provided with a heavy pipe, through which steam is selectively or additionally supplied or absorbed.
8. The ironing device according to any one of 8. 10. The hollow body is provided with a steam, temperature and/or pressure sensor, the measured values of which are supplied to an electronic control means for presetting the steam supply, temperature and/or pressure. Item 10. The ironing device according to any one of items 1 to 9. 11. The ironing device according to any one of claims 1 to 10, wherein the press plates can approach and separate from each other in a direction perpendicular to the ironing surface. 12. The ironing device according to any one of claims 1 to 11, wherein the press plate is opened and closed by a swinging motion. 13. The ironing device according to any one of claims 1 to 12, wherein the space of the hollow body of the one press plate is larger than that of the opposing press plate. 14. A method of operating an ironing device according to any one of claims 1 to 13, wherein after the press plate moves in a direction perpendicular to itself and the supply of steam is started, the steam is , a method characterized in that it is absorbed according to the respective material to be ironed and is continued even when the steam supply is stopped. 15. A method of operating an ironing device according to any one of claims 1 to 13, wherein each steam is blown by said one press plate onto the material to be ironed between said press plates, simultaneously or with a delay. A method characterized in that the pressure is absorbed by opposing press plates.