JPH0242661B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stretching heating and humidifying device used for forming honeycomb cores made of non-metallic material, particularly paper.
In other words, non-metallic honeycomb cores such as those made of paper, which have excellent strength-to-weight ratio and are used as structural materials such as plate materials, and are also widely used in various other industrial fields, are The present invention relates to an expansion heating humidification device used in

First, conventional technology will be described.

First, a conventional method for forming a non-metallic honeycomb core will be outlined. That is, the forming method is to first expand an unexpanded honeycomb core formed into an endless shape to a predetermined amount in a drawing process while squeezing it from both sides along the ribbon direction, which is the width direction; There is a forming method in which a large number of protrusions on a feeding belt are inserted into each core of the honeycomb core, and the honeycomb core is further expanded while forming creases, or in addition to these methods, the honeycomb core is further expanded by water spray etc. in this expansion process. A molding method has been used in which the core is humidified and dried in a post-drying step.

In the former forming method, since the honeycomb core is not humidified during expansion, the formed honeycomb core shrinks over time due to the influence of outside air conditions such as humidity, resulting in poor dimensional stability. On the other hand, in the latter forming method, the honeycomb core is humidified by water spray or the like during expansion and then dried, so the above-mentioned drawback of shrinkage of the formed honeycomb core is eliminated and the dimensions of the honeycomb core are stabilized.

By the way, the stretching and humidifying device used in the stretching process of the latter molding method has been made up of a general stretching feed belt with a water spray device attached thereto as a humidifying means. Water was then sprayed onto the honeycomb core, which was further expanded and conveyed on the feed belt.

Conventional technology worked like this.

Next, the problems to be solved by this invention will be described.

The following problems have been pointed out with respect to the above-mentioned latter molding method and the stretching humidifying device used in the stretching process. In other words, in the water spray device which is the humidifying means of this expanding humidifying device, the water is sprayed onto the entire outer surface of the non-metallic honeycomb core that is being transported while being further expanded, that is, most of it is located inside in the vertical state forming each cell of the non-metallic honeycomb core. It has become extremely difficult to apply moisture uniformly from the outside to each cell wall surface.

To explain this point in detail, first, as is well known, a honeycomb core consists of a planar assembly of hollow columnar cells of a predetermined height, and only the upper and lower surfaces of the cells are open. Due to the position and angle, it is difficult to uniformly apply moisture to each cell wall surface through the openings on the top surface of the honeycomb core, which is disposed above and outside of the honeycomb core being transported. At the same time, the roughness of the water particles and the unevenness of the moisture caused it to hit hard in some places and not so hard, making it even more difficult.

Therefore, with such conventional expansion humidifiers, it is extremely difficult to uniformly permeate moisture to the inside of each cell wall and humidify evenly, and there are areas where humidification is present or strong or weak between each cell wall. There was a problem where it happened. It has been pointed out that the honeycomb core, which has been dried and has been formed, has a drawback that the dimensions are not uniform depending on the presence or absence of humidification and the strength and weakness of the core. These effects were more pronounced in honeycomb cores with smaller cell sizes.

Such problems have been pointed out in conventional expansion humidification devices.

The present invention has been developed in view of the above circumstances, and includes a pair of upper and lower conveyors having ventilation, and a predetermined steam pipe that faces the conveyors via a punched metal. The purpose of the present invention is to propose a stretching heating humidifying device that can uniformly humidify each cell wall of a honeycomb core by stretching a non-metallic honeycomb core.

The technical means of the present invention for solving such problems are as follows.

The expansion heating and humidifying device used for forming this non-metallic honeycomb core starts with installing a pair of upper and lower conveyors with air permeability, such as a net conveyor, between the inlet and the outlet in a heated steam chamber equipped with an inlet and an outlet. It becomes. The conveyor holds a non-metallic honeycomb core expanded to almost a predetermined amount between its open upper and lower surfaces, and conveys the core while further expanding it using a drive source as appropriate.

In addition, a meandering steam pipe equipped with a large number of jetting ports for heating steam supplied from a heating steam source is arranged at a position almost entirely facing the conveyor on one side, and a meandering steam pipe is provided between the conveyor and the steam pipe. It is made of perforated metal with many small holes.

The heated steam chamber is filled with heated steam to form an atmosphere centered between the conveyors.

Since the present invention is comprised of such means, it operates as follows.

The non-metallic honeycomb core that has been expanded to almost a predetermined amount is further expanded and humidified by the expansion heating humidification device.

In other words, in the heated steam chamber of this expansion heating humidifier, heated steam is ejected from each outlet of the steam pipe that snakes along almost the entire surface of the conveyor, and is permeable through punched metal with many small holes. An atmosphere is created by heated steam filling the space between the upper and lower conveyors. Therefore, in such an atmospheric condition, the honeycomb core, which is being conveyed while being held between conveyors while being expanded, has moisture uniformly attached to its outer surface, that is, to the wall surface of each cell, which is located mostly inside in a vertical state. humidified.

In other words, since the filled heated steam forms an atmosphere, the moisture can evenly enter each cell through the openings on both the upper and lower sides of each cell of the honeycomb core, ensuring that all the water is absorbed uniformly and reliably from all positions and angles. can come into contact with and adhere to the cell wall surface.
Furthermore, in an atmospheric condition, the moisture is uniformly distributed, and the particles are fine and have a large kinetic energy, so uniform adhesion is promoted from this aspect as well.

In this manner, in this expansion heating humidification device, it is possible to uniformly permeate moisture to the inside of each cell wall of the honeycomb core, thereby achieving uniform humidification. It should be noted that these can be achieved without any change even for honeycomb cores with small cell sizes. The honeycomb core is then dried to complete its formation.

This is how the invention works.

The present invention will be described in detail below based on embodiments shown in the drawings.

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway plan view showing the molding apparatus together with other molding apparatuses, FIG. 2 is a sectional view of the same side, and FIG. 3 is a perspective view of the main parts thereof.

First, the outline of the method for forming a non-metallic honeycomb core will be explained in the order of the drawing step, the stretching heating humidifying step, the drying step, etc.

First, the drawing process will be described. 1 is an unexpanded honeycomb core made of nonmetallic material such as paper, which is formed into an endless shape. After this honeycomb core 1 is fed out in a plane from a feeding device 2 of a forming device, it is drawn out in a ribbon direction, orthogonal to the endless longitudinal direction and conveyance direction of the honeycomb core 1, by a drawing device 3 of the forming device that performs a drawing process. Along the width direction and lateral direction, as shown in FIG. 1, it is expanded in the transport direction indicated by the arrow while being squeezed from both left and right sides. That is, while the honeycomb core 1 is guided and conveyed in the direction of the arrow by rollers 3a, 3a, 3a, it is narrowed by coming into contact with holding plates 3a, 3b arranged at a predetermined interval on both the left and right sides and inclined as shown in the figure. It is expanded almost to the predetermined amount.

Next, the expansion heating and humidification process will be described. The honeycomb core 1 squeezed in the drawing process in this way is
The expanded heating and humidifying device 4 of the molding device forming the expanding heating and humidifying device, which will be described in detail later, holds the open upper and lower surfaces while ensuring air permeability, and is further expanded and conveyed in an atmosphere of heated steam. Ru. As is well known, the honeycomb core 1' is a planar assembly of hollow columnar cells of a predetermined height, and only the upper and lower surfaces of the cells are open. It is further expanded and transported in a steam atmosphere.

Next, the drying process etc. will be described. The honeycomb core 1' that has been expanded, heated, and humidified in the expansion, heating, and humidification step is held between a pair of air-permeable conveyors 5a and 5b, such as a net conveyor, by the drying device 5 of the forming device that forms the drying step. It is dried while being washed. Here, the heated steam, particularly the saturated steam, has heat and has a large kinetic energy, so it easily evaporates from the material inside the cell walls, and the honeycomb core 1' is quickly dried. Afterwards, the honeycomb core 1' formed in this manner is cut into appropriate lengths by a cutter device 6 in a cutting step.

The above is an outline of this molding method.

The expansion heating humidification device 4 according to the present invention will be explained below.

4a is a heating steam chamber of the expansion heating and humidifying device 4, and this heating steam chamber 4a has an inlet 4b and an outlet 4c of the honeycomb core 1 at opposing positions in the front and rear. Inlet 4b and outlet 4 in heating steam chamber 4a
A pair of upper and lower conveyors 4d, 4d are provided between the two conveyors 4d, 4d, and the pair of conveyors 4d, 4d is constructed of a ventilated structure such as a net conveyor.
The conveyors 4d, 4d are moved from the inlet 4b side to the outlet 4c via rolls by a driving source (not shown).
The non-metallic honeycomb core 1, which has been expanded to almost a predetermined amount by the expansion device 3, is held between its open upper and lower surfaces, that is, the cell end faces, and is further expanded at the same speed as shown in the arrow. transport in the direction.

A position, for example, a lower position, which is almost entirely opposite to one side of the conveyors 4d, 4d is connected to a heating steam source (not shown) such as a boiler, and a large number of heated steam such as saturated steam supplied thereto are connected to the heating steam source (not shown) such as a boiler. spout 4e,
Steam piping 4f having 4e, . . . is arranged. A large number of small holes are provided between the steam pipe 4f and the conveyor 4d so that the heated steam spouted from each spout 4e, 4e, . . . forms an atmosphere and moisture adheres uniformly to the honeycomb core 1. 4g of punching metal is arranged. Furthermore, for the same purpose, the steam pipe 4f winds left and right facing the conveyor 4d as shown in FIG.
d, and faces the honeycomb core 1 over almost the entire surface as shown in the figure.

In this way, an atmosphere is formed in the heating steam chamber 4a between the conveyors 4d, ie, around the honeycomb core 1 being conveyed, filled with heated steam. In other words, the heated steam ejected from the ejection ports 4e, 4e, . . . is complete steam at the moment of ejection, but it immediately turns into extremely fine water droplets in the form of mist and forms an atmosphere.

Since the expansion heating humidification device 4 according to the present invention is configured as described above, it operates as follows.

As mentioned above, in the heating steam room 4a, the steam pipe 4f meandering along almost the entire surface of the conveyor 4d.
Heated steam is ejected from each spout 4e, 4e, ..., reaches the breathable conveyor 4d via the punched metal 4g with a large number of small holes, and fills the space between the upper and lower conveyors 4d, 4d. Atmospheric conditions are formed. The non-metallic honeycomb core 1 that has been expanded to almost a predetermined amount by the expansion device 3 is then further expanded and humidified by such an expansion heating humidification device 4.

That is, the honeycomb core 1 that has entered such a heating steam chamber 4a from the inlet 4b is sandwiched between the open upper and lower surfaces by conveyors 4d, 4d that move in the direction of the arrow via rolls by a drive device (not shown). The drying process is further carried out while being expanded, and is carried out from the outlet 4c to the next drying process. At that time, in the atmospheric state of the heating steam chamber 4a, the honeycomb core 1 sandwiched between the conveyors 4d, 4d has moisture on its outer surface, that is, on each cell wall surface located mostly inside in a vertical state. This results in uniform adhesion and humidification.

In other words, the filled heated steam forms an atmosphere and falls as extremely fine water droplets in the form of mist, so that the moisture can evenly enter each cell through the openings on both the top and bottom of the honeycomb core 1, that is, each cell. , uniformly and reliably from all positions and angles.
It can contact and adhere to all cell walls. Furthermore, in an atmospheric condition, the moisture is evenly distributed, and the particles are fine and have a large kinetic energy, so uniform adhesion is promoted from this aspect as well.

In this way, by using this expansion heating humidification device 4, it becomes possible to uniformly permeate moisture to the inside of each cell wall of the honeycomb core 1 and uniformly humidify the honeycomb core 1. Note that these can be achieved with the honeycomb core 1 having a small cell size as well as with the honeycomb core 1 having a large cell size. In other words, since it is in an atmospheric state, the moisture can enter the cells of small cell size without any problem, and the cell walls can be uniformly humidified. The honeycomb core 1 is then dried afterwards to complete its formation.

The above is the explanation of the operation, etc.

Next, we will discuss the effects.

As explained above, the expansion heating and humidifying device used for forming a non-metallic honeycomb core according to the present invention includes a pair of upper and lower conveyors having air permeability and a predetermined steam pipe that faces the conveyors via a punched metal. However, by forming a heated steam atmosphere between the conveyors, the following effects are achieved.

In other words, since the non-metallic honeycomb core is transported while being expanded in an atmosphere of heated steam, moisture adheres uniformly and reliably to the outer surface of each cell wall, and the moisture is absorbed inside the material of each cell wall. It penetrates evenly and reliably. Therefore, by using this expansion heating humidification device, each cell wall is uniformly humidified, and the occurrence of humidification/weakness/absence points between the cell walls is prevented. This post-drying results in a honeycomb core with uniform dimensions. And these can be achieved just as reliably with a honeycomb core with a small cell size as with a honeycomb core with a large cell size.

In this way, the problems that existed in this type of conventional example are completely eliminated, and the effects of the present invention are remarkable and great.

[Brief explanation of drawings]

The drawings show an embodiment of the expansion heating humidification device used for forming a non-metallic honeycomb core according to the present invention. FIG. 1 is a partially cutaway plan view shown together with other molding devices, and FIG. 2 is a sectional view of the same side. FIG. 3 is a perspective view of the main parts. 1...Unexpanded non-metallic honeycomb core, 1'
...Expanded non-metallic honeycomb core, 2...
Feeding device, 3... Squeezing device, 3a... Roller,
3b... Pressing board, 4... Expansion heating humidification device, 4a
...Heating steam chamber, 4b...Inlet, 4c...Outlet,
4d... Conveyor with air permeability, 4e... Spout nozzle, 4f... Steam piping, 4g... Punching metal, 5... Drying device, 5a... Conveyor with air permeability, 6... Cutter device.

Claims (1)

[Scope of Claims] 1. A pair of upper and lower conveyors having air permeability, such as a net conveyor, are provided between the inlet and the outlet in a heated steam chamber equipped with an inlet and an outlet, and the conveyor is provided with a pair of upper and lower conveyors having air permeability such as a net conveyor, and the conveyor is heated in advance to almost a predetermined amount. The expanded non-metallic honeycomb core is held between its open upper and lower surfaces, and is further expanded and conveyed by a drive source as appropriate, and is located at a position almost entirely facing the conveyor on one side. A meandering steam pipe equipped with a large number of jetting ports for heated steam supplied from a heating steam source is arranged on the conveyor, and a punched metal with a large number of small holes is arranged between the conveyor and the steam pipe. An expansion heating humidification device used for forming a non-metallic honeycomb core, characterized in that an atmosphere is formed in the heated steam chamber mainly between the conveyors with heated steam.