JP2815411B2 - Heat treatment equipment for synthetic resin coated metal containers - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat treatment apparatus for a synthetic resin-coated metal container which can be suitably used as an exterior container for housing a capacitor element constituting an aluminum electrolytic capacitor.

(Prior art and its problems) It is known that a laminated body having a synthetic resin layer provided on at least one surface of a metal plate such as an aluminum plate is drawn to form a synthetic resin-coated metal container such as a container for a capacitor. . However, a container for a capacitor exterior obtained by drawing using such a laminate has the following problems.

In other words, after performing a drawing process such as a multi-stage drawing in the container for condenser exterior, after inserting the capacitor element,
When caulking (curling) is performed, even if there is no problem in interlayer adhesion in the drawing, the resin in the caulked portion is peeled or broken, so that problems are likely to occur in the performance and appearance as an external container of the capacitor.

Then, after drawing, the obtained container is heat-treated to improve the adhesive strength between the layers, and the container with the opening portion is transferred by a needle-like body as a device for the heat treatment. It has been found that a large number of containers can be continuously heat-treated by performing the heat treatment (Japanese Patent Application No. 63-169643).
issue).

However, in the above heat treatment apparatus, a linear one is used as the needle-shaped body. Therefore, when a container having an inner surface coated with a synthetic resin is heat-treated, as shown in a schematic sectional view of FIG. There is a problem that it is difficult to transfer the container to the next step because the linear needle-shaped body 31 is in close contact with the surface and it is difficult to separate them. This tendency was particularly large when the heat treatment temperature was high.

An object of the present invention is to provide a heat treatment apparatus capable of easily and mass-treating a metal container whose inner surface is also coated with a synthetic resin as described above.

(Means for Solving the Problems) In order to achieve the above object, in the heat treatment apparatus of the present invention, a synthetic resin-coated container having an opening downward is transferred by a needle-like body having a bent end to perform heat treatment. Thus, it has been found that the above problem can be solved.

Hereinafter, the present invention will be described in detail with reference to the drawings. First
FIG. 1 is a schematic sectional view showing an example of the apparatus of the present invention, and FIG.
FIG. 2 is an enlarged cross-sectional view taken along a line II in FIG. The synthetic resin-coated metal container 1 to which the present invention is applied is a metal container such as an aluminum plate which has been subjected to drawing processing on a laminated plate in which a synthetic resin such as a polyolefin-based resin, a nylon-based resin, or a vinyl chloride-based resin is coated in advance. However, depending on the application, a metal container which has been previously drawn and coated with a synthetic resin by a dipping method or the like can also be used.

The synthetic resin provided in the container 1 may be provided only on the inner surface of the container or on both the inner and outer surfaces, depending on the use and the like.

As shown in FIG. 1, in the apparatus of the present invention, an endless chain provided with feeders 2 and needles 3 for supplying the above-mentioned containers with their openings downward and arranged in an example at regular intervals in the traveling direction. 4, mainly comprising a heat treatment furnace 5 and a cooling device 6 provided so as to cover an intermediate portion of the endless chain 4.

The feeder 2 can use a normal vibration-type parts feeder. A plurality of containers with opening portions downward are sent out to the feeder tip 21 sequentially, and the containers held at the feeder tip 21 are successively placed in the endless chain 4. It is transported by the upper needle 3. As this endless chain, a normal endless chain connected to a drive motor capable of changing the speed can be used. In the endless chain, a plurality of needle-like bodies 3 are provided at regular intervals in the traveling direction of the chain. The containers do not come into contact with each other.

An enlarged view of the vicinity of the feeder tip is shown in FIG. 2. The container 1 is fed into the feeder tip 21 by sliding the shooter 22 inclined at a certain angle. A notch is provided below the feeder tip 21 so that the tip of the needle 3 can be easily inserted into the inner surface of the container.

The needle-shaped body 3 used in the present invention is made of, for example, metal,
As shown in FIG. 2, the tip is bent in a V shape.
By adopting such a shape, while the conventional linear needle-shaped body comes into line contact with the inner surface of the container, the needle-shaped body comes into point contact with the inner surface of the container, and the close contact with the inner surface of the container is reduced. Separation of the needle from the container is facilitated. The tip shape of the needle 3 may be a semicircle, a spiral, or the like. The degree of bending may be appropriately determined in consideration of the ease of insertion into the container.

In addition, a stopper 23 for holding the container and a container holder 25 for preventing the container from jumping up by the needle-like body are provided at the upper part of the container at the feeder tip 21. The stopper 23 can be formed by bending a side guide plate provided on the shooter 22, and the container holder 25 is made of a material having some elasticity, for example, a bundle of plastic fibers, and slightly presses the upper surface of the container. It may be used in such a manner.

Further, as shown in FIG. 1, a heat treatment furnace 5 is provided at an intermediate portion in the traveling direction so as to cover the chain, and a heat circulating heat treatment apparatus can be suitably used. The heating temperature, capacity, and the like of the heat treatment furnace may be appropriately determined in consideration of the type of resin coated on the container, the speed of the endless chain, and the like. Further, a cooling device 6 is provided behind the endless chain in the traveling direction. As the cooling device, a cooling device using ordinary cold air can be used. After cooling, the container is stored in the storage box 7 and used in the next step.

(Effects of the Invention) As described above, according to the apparatus of the present invention, a metal container coated with a synthetic resin on its inner surface can be reliably and continuously heat-treated in large quantities, and a special transport device or the like is used. Thus, an apparatus having a simple configuration can be obtained without using the same, and can be suitably used for an aluminum electrolytic capacitor outer container and the like.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an example of the apparatus of the present invention, FIG. 2 is an enlarged cross-sectional view of a part II in FIG. 1, and FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... Metal container coated with synthetic resin 2 ... Feeder 21 ... Feeder tip 3 ... Needle body 4 ... Endless chain 5 ... Heat treatment furnace 6 ... Cooling device

Claims (1)

(57) [Claims] 1. An apparatus for heat-treating a synthetic resin-coated metal container (1) having at least an inner surface coated with a synthetic resin and having an opening downward, wherein a plurality of containers (1) are arranged and supplied as an example. An endless chain (4) in which a plurality of needle-like bodies (3) having bent ends are provided at a distal end (21) of the feeder (2) at regular intervals in the traveling direction. A synthesis that is arranged so as to be inserted into the inner surface of the container held by the feeder tip (21), and further includes a heat treatment furnace (5) and a cooling device (6) sequentially arranged in the forward direction of the endless chain (4). Heat treatment equipment for resin-coated metal containers.