JPS6238889Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a sealer used for welding and fusing packaging materials in, for example, automatic packaging machines.

(Prior Art and Problems) Conventionally, this type of sealer has been constructed by attaching a sealer body 1e, which has a heater 4a inside, to a sealer shaft 10e by bolting or other means, as shown in FIG. 5, for example. However, in this conventional sealer, the heater 4a
Heat conducted to the sealer shaft 10e causes expansion of the sealer shaft 10e and the bearings supporting the shaft, and as a result, the bearings are damaged, making it impossible to operate the sealer properly. A dot had appeared.

Therefore, in the past, there is a method shown in FIG. 6 as a means to solve this problem. That is, in the one shown in the figure, a heater 4b is arranged near the sealing surface 2f at the upper end of the sealer main body 1f, and members 15, 15a, . . . having heat insulating properties are provided below and on the sides of the heater 4b. This is intended to block heat conduction from the heater 4b to the sealer shaft 10f.

However, in the conventional device shown in FIG. 6, for example, as shown in the same figure, the cutter blade 3f is
is installed, the heat of the heater 4b will be conducted to the lower part of the sealer body 1f via the cutter blade 3f, and a situation will occur in which it will not be possible to completely block the heat conduction of the heater 4b to the sealer shaft 10f. As a result, it has not yet been possible to solve the problem that the sealer shaft becomes unduly heated due to continued operation for a long period of time, causing trouble in its operation.

In addition, in the conventional method, the heater 4b is arranged on the upper part of the sealer main body 1f, and the heater 4b is connected to a heat insulating member, as is clear from the comparison between the configuration shown in the figure and the other configuration shown in FIG. 15, etc., is very complicated, and the heater 4b cannot be a commonly used heater, so the heater 4b and the sealing surface 2f are made separately from the sealer body 1 by special processing. However, this had the fatal problem of extremely poor manufacturing efficiency and high cost. Furthermore, this type of sealer requires extremely precise dimensional accuracy, but since the work of manufacturing each of the parts individually with high precision is extremely complicated, the problem in manufacturability becomes even more serious. It had become a thing.

In this way, although devices have been developed that prevent the heat of the heater from being conducted to the sealer shaft, it is still not possible to expect a complete insulation effect, and there are also problems in terms of manufacturing efficiency. It did have some problems.

The present invention was devised to solve the above-mentioned conventional problems, and its purpose is to improve the effectiveness of blocking heat conduction from the sealer body to the sealer shaft. The object of the present invention is to prevent undue heating of the liquid, and to have a simple structure and very good manufacturability.

(Means for Solving the Problems) The present invention was constructed to achieve the above objectives and solve the conventional problems, and the gist of its construction is as follows:
Ceramics 6 made of metal layers such as copper fused to the upper and lower surfaces of the sealer body 1 are integrally fixed to the lower surface of the sealer body 1 by welding means.

(Function) Therefore, in the sealer having the above structure, since the ceramic 6 fixed to the lower surface of the sealer body 1 has a very excellent heat insulating effect, the sealer shaft 10 is connected to the sealer body 1 and the ceramics. The sealer shaft 10 is completely isolated and thermally insulated through the sealer shaft 10, thereby preventing inappropriate heat conduction to the sealer shaft 10. Further, the ceramic 6 has metal layers such as copper fused on its upper and lower surfaces, and is integrally fixed to the lower surface of the sealer main body 1 by welding means. Since the sealer body 1 is made of a single component, the sealer body 1 can be manufactured with high precision with the ceramics 6 integrated therein, and furthermore, the sealer body 1 can be attached to the sealer shaft 10 by ordinary means such as bolt tightening. This can be done easily and with high precision.

(Example) Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.

That is, in FIG. 1, reference numeral 1 indicates a sealer body made of steel material with a substantially arc-shaped sealing surface 2 formed on the upper surface, and a cutter blade 3 is attached to the upper tip of the sealer body 1. Furthermore, heaters 4 are provided on both sides of the approximately central portion. Reference numeral 5 indicates a heat insulating portion provided over the entire lower surface 12 of the sealer main body 1. The heat insulating portion 5 will be explained in detail with reference to FIG. This ceramic is metallized on the front and back surfaces and has layers 7 and 7a, and the ceramic 6 is formed by brazing and welding the fusion layer 7 on the upper surface side to the lower surface 12 of the sealer body 1 via a brazing filler metal 8. Reference numeral 9 denotes a steel plate for forming the bottom surface, which is brazed and welded to the fusion layer 7a on the lower end side of the ceramics 6 via the brazing material 8a. 10 is a sealer main body 1 having the heat insulating portion 5;
A rotatable sealer shaft is shown, which is attached with bolts 11.

The present embodiment has the above-mentioned configuration, and its operation will be explained next. First, the sealer body 1 is heated by the heat generated by the heater 4, and the sealing surface 2 is brought into a state where it can suitably seal a film such as a packaging material. On the other hand, the ceramic 6 existing under the sealer main body 1 has a thermal conductivity of, for example, about 0.2 kcal/mh.
℃ and its thermal conductivity is very small, the heat of the heater 4 is blocked by the ceramics 6, and the sealer body 1 and the sealer shaft 10 are completely separated via the ceramics 6. Because of the isolated state, inappropriate heat conduction from the sealer body 1 to the sealer shaft 10 is almost completely prevented, and the sealer shaft 10 is not heated to a high temperature even when the sealer is operated for a long time. It never happens. Also, during the sealing work, a considerable impact will be generated on the sealer body 1, but the heat insulating part 5 having the ceramics 6 and the sealer body 1 are firmly integrated by brazing welding. Therefore, it has impact resistance strength that can sufficiently cope with the impact at the time of sealing.

Furthermore, in manufacturing, this type of sealer requires extremely high precision in the dimension L from the axis of the sealer shaft 10 to the sealing surface 2. The height La including the steel plate 9 can be easily and accurately determined by cutting when manufacturing the sealer body 1.
It can be manufactured in La. This is because the dimension La can be arbitrarily set by cutting the steel plate 9 for forming the bottom of the lowermost layer. Therefore, a sealer having a predetermined appropriate height dimension L can be manufactured by simply placing and attaching the sealer main body 1 manufactured to the appropriate dimension La on the sealer shaft 10, Even if the bolts 10 and the like are firmly tightened, the ceramics 6 and the like are not compressed and deformed at all and maintain their initial set dimensions.

In the above embodiment, a steel plate is provided at the bottom layer below the ceramics fixed to the bottom surface of the sealer body, but the present invention is not limited to this, and other materials may be used. Alternatively, ceramics 6 having copper fusion layers 7, 7a on both upper and lower surfaces are brazed and welded to the lower surface 12 of the sealer main body 1 via a brazing filler metal 8, as shown in FIG. In this case, the lowermost fusion layer 7a can be machined to obtain sealer manufacturing accuracy.

Further, the metal to be fused to both the upper and lower surfaces of the ceramic is not limited to copper, and the means for fixing the ceramic to the lower surface of the sealer body to which the metal copper or the like is fused may be any welding method.

In addition, the present invention allows for design changes in the specific configuration of each part of the sealer body and the sealer shaft within the scope of the present invention; for example, it is not necessarily necessary to provide a cutter blade etc. on the sealer body, and
As shown in the figure, the ceramics 6 fixed to the lower surface of the sealer body 1a are attached to the sealer body 1a without providing a fastening part for bolting on the side of the sealer body 1a.
There is no problem in that the side portion 13 of the ceramic 6, which protrudes laterally than a, may be configured as a fastening portion for bolting the sealer body 1a to the sealer shaft 10a.

(Effects of the invention) As mentioned above, the present invention has ceramics having a heat insulating effect on the lower surface of the sealer main body, so that both the sealer main body and the sealer shaft can be completely isolated and separated through the ceramic. In this state, heat conduction from the sealer body to the sealer shaft can be blocked, and as a result, the heat insulation effect is greatly improved compared to conventional products, and the sealer shaft is prevented from being unduly heated. A particularly remarkable effect has been achieved in that the sealer can continue to operate in a suitable manner.

Furthermore, since the present invention improves the heat insulation effect as described above, it also has the practical benefit of reducing the heat loss of the heater in the sealer body, thereby reducing power consumption.

Furthermore, as an important effect, the present invention uses non-compressible ceramics with metal layers such as copper fused on both upper and lower surfaces as a heat insulating member provided on the lower surface of the sealer body. Not only does the sealer main body have excellent strength because it is integrated with the metal by welding, but the sealer main body is manufactured using a welding metal on the bottom side of the ceramic or a metal machine that separately welds it to the welding metal. It can be manufactured with extremely high dimensional accuracy through processing, and even when the manufactured sealer body is attached to the sealer shaft, there will be no compressive deformation due to bolt tightening during attachment. This has the great advantage of guaranteeing dimensional accuracy during assembly, achieving extremely good manufacturability, and reducing manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 show this embodiment, Fig. 1 A is a front view of the main part, Fig. 1 B is a sectional view, and Fig. 2 is a
FIG. 3 and 4 show other embodiments, FIG. 3 is an enlarged sectional view of a main part, FIG. 4 is a front view of a main part, and FIGS. 5 and 6 are sectional views showing a conventional example. 1...Sealer body, 6...Ceramics, 7,7
a... Fusion layer, 10... Sealer shaft.

Claims (1)

[Scope of utility model registration request] On the lower surface of the sealer main body 1 which is used by being attached to the sealer shaft 10, ceramics 6 made by welding metal layers such as copper on both the upper and lower surfaces are integrally fixed by welding means. A sealer featuring: