JPH0148748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a firing device for manufacturing bamboo products by continuously firing bamboo material wound around a skewer.

(Prior technology) In the continuous production of bamboo rings, the bamboo ring material is wrapped around the circumferential surface of a skewer rod to a predetermined thickness using a forming machine, and the material is baked while being continuously transferred to produce a product. However, it is known to perform a so-called sitting treatment in which the bamboo wheel material on the skewer is heated at a relatively low temperature before high-temperature firing. This sitting treatment is done to give the bamboo wheels elasticity, or ``koshi'', which makes them feel better.
The quality of the product is greatly influenced by whether or not this sitting process is performed satisfactorily.

However, in the conventional chikuwa firing apparatus, a heating means that emits infrared rays such as a gas infrared burner or an electric infrared heater is used as the low-temperature heating means for the sitting process, or heating means that emits infrared rays is used as the low-temperature heating means for the sitting process, or It is common to use waste heat, and the
Processing efficiency is poor because a long processing time of about 30 minutes is required, and as a result, the length of the sitting treatment path must be increased, resulting in a large sitting treatment room.

Therefore, in recent years, proposals have been made to use a heating device that emits far-infrared rays with a wavelength of about 4 to 1000 μm as a heating means for sitting treatment, thereby shortening the sitting treatment time and thereby reducing the size of the sitting treatment chamber. (Utility Model Application Publication No. 61-15993, Publication No. 61-15994,
Publication No. 61-43896, etc.).

(Problem to be solved by the invention) However, with the above conventional proposed method, although it is possible to shorten the sitting treatment time, the chikuwa material is not heated evenly to the inside, and only the surface side becomes hard and the inside becomes soft. However, there was a serious problem in that it was not possible to obtain high-quality chikuwa products.

The present invention was made in order to solve this problem, and the Chikuwa material is uniformly heated to the inside during a short sitting process, resulting in a high-quality product with excellent elasticity and stiffness. The purpose of the present invention is to provide a firing device that can produce chikuwa products.

(Means for Solving the Problems) In order to achieve the above object, the bamboo ring firing device according to the present invention continuously transfers the bamboo ring material wound around the skewer while rotating it, and heats it at a low temperature. In a chikuwa firing device that performs high-temperature firing after being subjected to sitting treatment, the heating means for the sitting treatment step is a far-infrared heater that heats a far-infrared radiation heating plate using an electric heater; The rod is made of magnetic metal material.

(Function of the Invention) As described above, in the present invention, the sitting treatment is performed using a far-infrared heater of the type that heats a heating plate for far-infrared radiation using an electric heater, and a magnetic metal is used as a skewer for winding the bamboo material. By using a skewer made of this material, it is possible to significantly shorten the zat processing time and the length of the zat processing path, while at the same time reducing the amount of bamboo material on the skewer internally during the sashi processing process. It can be heated evenly. As a result, the chikuwa material had excellent overall elasticity, and a high-quality chikuwa product with firmness was finally obtained.

For comparison, when we wrapped bamboo wheel material around a general skewer made of ceramic or non-magnetic metal and subjected it to sitting treatment, the heating effect did not evenly reach the inside of the bamboo wheel material around the skewer. The only product that could be obtained was a product that remained soft without any "stiffness" inside. Of course, if the heating time is extended until the desired sitting treatment effect reaches the inside, the surface side becomes too hard and the quality deteriorates. In addition, we have also carried out zapping treatment on bamboo wheel materials using a far-infrared heater using a gas burner as the heating source for the heating plate for far-infrared radiation, but even if we use a skewer made of magnetic metal material as described above, the results are satisfactory. No significant sitting treatment effect could be obtained. In other words, the desired purpose can only be achieved when both the conditions for using a skewer made of magnetic metal material and the conditions for using a far-infrared heater using electric heat as a heating source are satisfied. Even without it, satisfactory results could not be obtained.

The reason for this has not yet been clarified theoretically, but if we were to venture a guess, we could think of the following. In other words, radiant heating by far infrared rays is
The same wavelength (frequency) as the unique absorption wavelength (tuned frequency) of the heated substance for the heated substance.
This is achieved by applying far infrared rays from the outside to cause a heat generation phenomenon within the substance to be heated due to resonance, but only in the case of a skewer made of a magnetic metal material as described above. The fact that the inside of the surrounding bamboo ring material is heated quickly and sufficiently in the same way as the surface side of the bamboo ring material means that
Because the degree to which the skewer itself is heated by the emitted far infrared rays is greater for a skewer made of magnetic metal than for a skewer made of non-magnetic material, the skewer is heated quickly and from this skewer. Either the radiant and conductive heat of the bamboo wheel serves to heat the inside of the bamboo ring material, or the far infrared rays are reflected from the skewer because the degree of reflection of far infrared rays is greater in the skewer made of magnetic metal than in the skewer made of non-magnetic material. It can be inferred that this is because the energy of the far infrared rays is large, and the far infrared rays reflected from the skewers work effectively to heat the inside of the bamboo ring material around the skewers.

On the other hand, in order to effectively perform radiant heating with far infrared rays, far infrared rays of the same wavelength (frequency) as the unique absorption wavelength (tuned frequency) of the chikuwa material are required as described above. However, the wavelength of the far infrared rays emitted from the heating plate of the heater depends on the surface temperature of the heating plate.
The heating of the heating plate must be controlled so as to reliably obtain the surface temperature of the heating plate, which is calculated backward from the absorption wavelength unique to the chikuwa material. For example, the amount of heat generated can be controlled with high precision and easily using voltage control such as a thyristor system. According to the present invention, in which an electric heater that can be adjusted to It is extremely easy to emit far-infrared rays with a wavelength that can efficiently heat the chikuwa material, and when used in combination with the skewer made of the magnetic metal material described earlier, the desired purpose can be reliably achieved. This led to this.

In the present invention, the magnetic metal material constituting the skewer rod includes magnetic metals such as iron, cobalt, chromium, and nickel, or alloys thereof, and those with higher magnetism are more suitable. The standard of magnetism is that it has the ability to be attracted to a magnet.For example, stainless steel should preferably have a relatively small SUS number of about SUS21.
The above effect cannot be obtained with materials such as SUS24 that have a large SUS number and do not attract magnets. In other words, SUS21-23 stainless steel has a chromium content of about 13% and is a magnetic steel with a lumatensite structure, but when the SUS number is 24 or higher, the chromium content increases and a considerable amount of nickel is added. This is because it is a nonmagnetic steel that contains titanium, molybdenum, copper, aluminum, etc. in addition to chromium, and has an austenitic structure.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In Fig. 1, numeral 1 denotes a forming machine, which wraps a bamboo ring material 3 to a predetermined thickness at a predetermined position on a skewer 2 made of a magnetic metal material such as SUS21, as shown in Fig. 2. be. Reference numeral 4 denotes a screw conveyor, which conveys the skewer 2 with bamboo ring material set thereon sent out from the molding machine 1 while rotating diagonally upward and supplies it to the sitting processing section 5. Reference numeral 6 denotes a forming auxiliary brush provided in the middle of the conveyance path of the screw conveyor 4, which removes the protruding end portion of the bamboo ring material 3 wound on the skewer 2 and cleans the exposed surface of the skewer 2. It is something to do. Reference numeral 7 denotes a perforator installed in the conveyance path of the screw conveyor 4 on the downstream side of the forming auxiliary brush 6, and is equipped with a large number of perforating needles that move back and forth, and a bamboo ring wound around the skewer rod 2. When the winding thickness of the material 3 is above a certain level, a large number of micropores are formed in the bamboo wheel material 3.

The sitting processing unit 5 transfers the skewers 2 to the two upper and lower screw conveyors 8a and 8b whose conveyance directions are opposite to each other, and from the terminal end of the upper screw conveyor 8a to the start end of the lower screw conveyor 8b. Transfer rotating body 9 and each stage screw conveyor 8
Heating means 10a, 1 installed above a, 8b
It consists of 0b. Reference numeral 11 denotes a relay conveyor for transferring the skewers 2 sent out from the terminal end of the screw conveyor 4 to the starting end of the upper screw conveyor 8a in the sitting processing section 5.

Reference numeral 12 denotes a high-temperature firing processing section provided below the sitting processing section 5, which includes a screw conveyor 13 that transports the skewer 2 while rotating, a high-temperature firing heater 14, and a high-temperature firing section 12 that rotates and conveys the skewer 2. An oil applicator 15 that applies oil to the chikuwa material 3, a perforator 16 that pierces the chikuwa material 3 with a number of needles to remove air during firing, and a chikuwa material 3 fired for polishing.
It consists of a blower 17 etc. that blows air to the
Lower screw conveyor 8 in sitting processing section 5
The skewer 2 sent out from b is transferred to the rotating body 18 for transfer.
is transferred to the starting end of the screw conveyor 13 in the high-temperature firing processing section 12.

Reference numeral 19 denotes a cooling section for cooling the fired bamboo material 3, which includes a forced air cooling processing chamber 20 and a natural cooling section 21.
A chain conveyor 22 is provided that continuously conveys the skewers 2 over the entire length. 23 is the cooling section 19
This is a skewer for separating fired and cooled bamboo wheel material 3 from skewers 2 sent out from the machine, and the extracted skewers 2 are returned to the forming machine 1 side by a chain conveyor 24 for returning skewers. 25 is a skewer cleaner for cleaning the skewer 2 on the way back to the molding machine 1; 26;
2 is a skewer oil applicator, and 27 is a skewer storage box.

As shown in FIGS. 3 and 4, the upper and lower heating means 10a, 10 in the sitting processing section 5
b is composed of a large number of far-infrared panel heaters 29 attached to frames 28a and 28b that can be raised and lowered, and each far-infrared panel heater 29 is
A far-infrared radiation heating plate 30, an insulating plate 31, and a base 32 formed of ceramic or the like are integrally connected by a bracket 33, and a nichrome wire or the like is connected between the heating plate 30 and the insulating plate 31. A suitable electric heater 34 is provided. 3
5 is a power supply line to the electric heater 34.

Incidentally, each frame 28a, 28b in the upper and lower heating means 10a, 10b is connected to a chain 36, respectively.
gear wheels 37a and 37b, which are suspended so as to be raised and lowered by chains 36a and 36b, and whose upper ends are locked in the engaged state, are moved to the raising and lowering operation means 3.
8a, 38b, the frames 28a, 28b, that is, the heating means 10
The far infrared panel heaters 29 a and 10b are raised and lowered to connect the lower screw conveyors 8a and 8b.
the distance between the screw conveyor 8
It is possible to adjust the distance D between the bamboo wheel material 3 on the skewer 2 and the bamboo wheel material 3 conveyed by a and 8b.

Reference numeral 39 is an inspection window provided on both side walls 40 of the sitting processing section 5, and is provided with a door 41 that can be opened and closed.

In the sitting processing section 5 configured as described above, the skewer rod 2 (made of a magnetic metal material such as SUS21), on which the bamboo wheel material 3 is wound to a predetermined thickness by the forming machine 1, has both left and right ends. Screw conveyor 8a, 8b respectively
While the bamboo wheel material 3 on the skewer rod 2 is conveyed while being supported by the heating means 10
It is heated by far infrared rays emitted from the far infrared panel heaters 29 of a and 10b. At this time, the heating plate 3 for far infrared radiation of each panel heater 29
Electric heater 3 so that the surface of 0 reaches a predetermined temperature
As a result, the amount of heat generated by the far-infrared radiation heating plate 3 is controlled by voltage adjustment using a thyristor system.
Far infrared rays having a wavelength that can be efficiently absorbed by the chikuwa material 3 are emitted from the chikuwa material 3. Therefore, in combination with the fact that the skewer 2 is made of magnetic metal, the bamboo wheel material 3 is heated evenly to the inside at an appropriate temperature, and is given good elasticity, that is, ``strain''.

To give an example of the conditions for this sitting treatment, the surface temperature of the far-infrared panel heater 29 (the surface temperature of the heating plate 30 for far-infrared radiation) is 350 to 400°C, the ambient temperature inside the sitting treatment section 5 is 200 to 250°C, and the far-infrared The distance between the panel heater 29 and the chikuwa material 3 is 60 mm, and the temperature of the chikuwa material 3 when it is carried into the sitting processing section 5 is 7.
~8℃, sitting treatment time 3~5 minutes, Chikuwa material 3
The inside was heated almost uniformly to about 40℃, and the desired sitting treatment effect was obtained.

The chikuwa material 3 that has undergone the above-mentioned sitting treatment is carried into the high-temperature firing treatment section 12 and transferred to the screw conveyor 13.
While being transported while rotating, the oil applying machine 15
After being subjected to various treatments such as oiling, high-temperature firing using a high-temperature firing heater 14, air removal using a perforator 16, and polishing using an air blower 17, it is transported to a cooling section 19. Then, it is cooled while being continuously conveyed between the forced air cooling processing chamber 20 and the natural cooling section 21, and the skewers 2 are extracted by the skewer cutter 23 to become a chikuwa product.

(Effects of the Invention) According to the Chikuwa baking apparatus of the present invention which can be carried out as described above, a far-infrared heater that heats a far-infrared radiation heating plate with an electric heater is used as a heating means in the sitting treatment process. , By using a magnetic metal material as the skewer for wrapping the bamboo wheel material, the sitting processing time was significantly reduced.
This not only makes it possible to reduce the size of the sitting treatment chamber, but also heats the chikuwa material uniformly and at an appropriate temperature from the surface side to the inside, giving the entire chikuwa product good elasticity and providing a suitable level of elasticity. It is possible to produce high-quality chikuwa products that are firm and have a good texture.

[Brief explanation of drawings]

Figure 1 is a schematic side view of the entire firing device, Figure 2 is a perspective view of a skewer wrapped with bamboo material, Figure 3 is a vertical cross-sectional front view of the sitting processing section, and Figure 4 is a far-infrared panel heater. FIG. 1... Molding machine, 2... Skewer, 3... Chikuwa material,
5... Sitting processing unit, 8a, 8b, 13... Screw conveyor, 9, 18... Rotating body for transfer, 10
a, 10b... Heating means for sitting treatment, 12... High temperature firing processing section, 14... Heater for high temperature firing, 2
9...Far-infrared panel heater, 30...Heating plate for far-infrared radiation, 34...Electric heater, 36
a, 36b...hanging chain, 38a, 38
b... Lifting operation means.

Claims (1)

[Claims] 1. A bamboo wheel firing device that continuously transports bamboo wheel material wound around a skewer while rotating it, performs sitting treatment by low-temperature heating, and then performs high-temperature firing, wherein the heating means for the sitting treatment step is A bamboo ring firing device comprising a far-infrared heater that heats a heat generating plate for far-infrared radiation using an electric heater, and wherein the skewer is made of a magnetic metal material.