JPS59163129A - Method and device for drying inside of vessel - 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 The present invention relates to a method and apparatus for drying the inside of a container for completely removing residual sterilizing liquid after sterilization using, for example, H2O2 mist.

FIG. 1 is an explanatory diagram showing an example of a liquid filling and packaging machine using a cylindrical molded carton.The aseptic packaging machine 1 has almost the entire aseptic chamber 2, and the molding is carried out in a box manufacturing chamber 3. After inspecting the bottom sealed carton (cylindrical container) 4 in the molding defect detection section 5, it passes through the H2O2 spray section 6, the U lamp irradiation section 7, and then the hot air blows out from the nozzle 9 in the hot air drying section 8. Dry with air, then liquid filling section lo
, the top heating section 11, and the top pressure sealing section 12, the filling and packaging process in an aseptic state is completed.

Naturally, it is necessary to maintain sterile conditions in each of these steps, but residual H2O2 mist poses a sanitary problem, so complete drying in the hot air drying section 8 is required. Ru.

By the way, the size of the carton 4 varies, and it is also required to complete drying in a fairly short period of time. Drying conditions are set by temperature, air volume, time, etc. Drying at high temperatures is more efficient, but carn 1-4 uses a laminated material of paper and polyethylene (PE), and the PE Due to its sensitive nature to heat, it is necessary to avoid setting the drying temperature above 100°C, and in order to improve the drying effect by increasing the temperature, it is necessary to set the drying temperature above 70°C. It was difficult to uniformly dry the inside at a temperature in the range of 70 to 100°C.

Therefore, many studies have been conducted on drying, and various drying nozzles have been devised.

However, when drying a cylindrical container, the drying hot air ejected from the nozzle tends to cause air pockets inside the cylindrical container 4, and the hot air does not reach the bottom of the container, making it difficult to dry quickly. I couldn't do it. The present invention
The purpose is to improve the drying effect and shorten the drying time by eliminating the areas in the container that the hot air for drying cannot reach.

That is, when the cylindrical container 4 is passed under the drying nozzles 9 arranged in series to dry the droplets in the container, the inner diameters of the drying nozzles are changed and the cylindrical containers 4 are arranged in series. It was discovered that by doing so, air pockets would not be generated within the container and the drying effect could be improved.

Figure 2 is an explanatory diagram showing an experimental example based on the above concept. Upper part unformed) Size 70nWlIX 70mn
X 250nwn was placed below the nozzles arranged in series and passed under each nozzle for 1 second to dry.

Nozzle 9 has an inner diameter of 101 cm [A], and an inner diameter of 60 n
In [B] was also used, and the arrangement was performed alternately. For each nozzle, the dry air used was compressed air heated with an electric heater, and the pressure was 4 kg/cn.
It was set to (See table below) Nozzle compressor pressure
Velocity at exit (kg/a) (m/
s) A 4.0 50B
4.0 25 Also, the temperature of the heated air at the outlet was 1208C in both cases.

For comparison, four samples with only nozzle A and four samples with only nozzle B were used.

Using such an apparatus, the carton surface temperature was measured at six points evenly above and below, as shown in FIG.

The results are shown in Figure 4 (state of surface temperature rise at the position shown in Figure 3) and Figure 5 (state of surface temperature rise at the position shown in Figure 3).
, Fig. 6 (Surface temperature rise state at the position shown in Fig. 3 (■)), Fig. 7 (Surface temperature rise state at the position shown in Fig. 3 (4)), Fig. 8 (Surface temperature rise state at the position shown in Fig. 3 (■)) FIG. 9 (state of surface temperature increase at position +fi+ in FIG. 3). These graphs are obtained by measuring the temperature rise inside the carton over time due to three types of nozzle systems.

As can be seen from this result, B, which is as wide as the nozzle hole,
The top of the carton 1 to 1 is well heated, but the bottom of the carton is hardly heated.Also, in case A, the bottom of the carton is well heated, but the top is not heated. do not have.

These results showed that by combining nozzles with large and small diameters, the inside of the carn 1 was heated uniformly throughout.

Next, we looked at the drying state when droplets were actually applied. Using a H2O2 aqueous solution, a spray nozzle (two-fluid type) manufactured by Spray Ink System Co., Ltd. is used to deposit a mist with a water droplet diameter of approximately 0.2 to 0.8μ in the aforementioned carton, and then the same is applied to the aforementioned drying nozzle. dried under conditions. The results are shown in the following table and Figure 1O.

Drying condition A × A10B ○ B × A10B was all dried well, but mist remained on the bottom of B, and mistakes 1 to 1 remained on the top of A.

This is clear from the chart in Figure 10, which shows the temperature of each part of the carton after drying for 4 seconds.
In this case, the temperature difference between each part of the carton is large, and even if some parts are heated to 100°C, some parts are below 50°C, and it is clear that the entire carton cannot be dried properly. .

Furthermore, in the above-mentioned apparatus, an experiment was conducted by moving the nozzle up and down. In this case, the A+B method was used to give the nozzle a vertical movement in 1 second.

As shown in Fig. 1θ, the results of comparing the A'+B method with and without vertical movement show that the temperature of each part increased by about 5° C. by vertically driving the nozzle.

As explained above, in the present invention, in order to effectively dry droplets in a cylindrical container, the diameter of the drying nozzle is changed and the drying nozzle is arranged vertically relative to the cylindrical container. By moving it, we were able to further improve the effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of a liquid filling and packaging machine using a cylindrical forming carn, FIG. 2 is an explanatory diagram showing an experimental example showing the drying method according to the present invention, and FIG. A diagram showing the temperature measurement positions of each part of the cylindrical container in Figure 2, and Figure 4 is the same as Figure 3.
Figure 5 shows the increased surface temperature at the position shown in Figure 3. Figure 6 shows the increased surface temperature at the position shown in Figure 3. Figure 7 shows the increased surface temperature at the position shown in Figure 3. Figure 8 shows the surface temperature rise at the position ■ in Figure 3, Figure 9 shows the surface temperature rise at the position ■ in Figure 3, Figure 10 shows the surface temperature rise at the position ■. The figure is a diagram showing data of experimental examples in the case of a conventional example, in the case of changing the nozzle diameter according to the present invention, and in the case of moving the drying nozzle up and down. ■... Sterile packaging machine, 4... Cylindrical container (carton)
, 6... H2O2 spray part, 8... Hot air drying part, 9... Nozzle, 10... Liquid filling part,
12...Top pressure seal part. Agent Patent Attorney Makoto Kon Figure 2 Figure 3 Figure 4 1234 Secl Figure 5 Transition Time (SSC) Figure 6 Eken-Rashiharu (sea) Figure 7 ■ Kui ifl 7. AdasukurishiE et al., Agency 1]: Akudo X
Special! , Fig. 8 Gekishima Iba (sec) Fig. 9 Gekirenginma (sec) Procedural Amendment (Ki) July 12, 1980 Commissioner of the Patent Office Mr. Wakasugi Wainu■, Indication of the case 1988 Patent Application No. 0365.54 2, Name of the invention Method and device for drying the inside of a container 3, Relationship with the case of the person making the amendment Patent applicant address 12-chome, Ichigaya Kaga-cho, Shinjuku-ku, Tokyo
Name 1289) Dai Nippon Printing Co., Ltd. 4, agent drawings (Figs. 4 to 9) Fig. 4 Drying time (sec) Fig. 5 Drying time (see) Fig. 6 ) Figure 7

Claims (4)

[Claims] (1) In a drying device in which a cylindrical container is passed under drying nozzles arranged in series to dry the droplets in the container, the inner diameter of the drying nozzles is changed and the drying nozzles are arranged in series. A method for drying the inside of a container. (2) A method for drying the inside of a container according to claim 1, wherein the cylindrical container and the drying nozzle are moved relative to each other for drying, and the nozzle enters the opening of the container and moves up and down. (3) A cylindrical container is passed under the drying nozzles arranged in series to dry the droplets in the container, and the inner diameter of the drying nozzles is changed and arranged in series. A drying device inside the container featuring (4) A drying device inside a container according to claim 3, wherein the cylindrical container and the drying nozzle are moved relative to each other so that the drying nozzle enters the opening of the container and moves up and down.