Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Means for forming from bulk material – means for severing and...
Patent
1992-02-03
1993-12-07
Nguyen, Khanh P.
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Means for forming from bulk material, means for severing and...
83 90, 83 94, 83 95, 264146, 264148, 264160, 4253051, 425307, 425308, 4254031, 425461, 4147886, B29C 4714, B65G 5708
Patent
active
052678482
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an apparatus for manufacturing sheet pallets and other sheet materials such as tier sheets which are made of synthetic resins. The sheet pallets are used for carrying, transporting and storing several goods and tier sheets are inserted between adjacent layers of small containers which are stacked in layers to form a unit load.
BACKGROUND ART
As compared with wooden pallets, sheet pallets are light in weight and small in thickness and they excel in load carrying capacity and storing efficiency. Accordingly, the sheet pallets have spread rapidly.
FIG. 23 shows an example of a sheet pallet made of synthetic resin. The sheet pallet 1 comprises a rectangular sheet 11 made of a synthetic resin. The four corners 12 of the sheet 11 are rounded. A tab section 13 is formed in the periphery of one side edge which is folded at a score 15 (folding groove). Loads are place on the upper face 14 of the sheet pallet 1.
There has never been proposed an integrated through process for producing sheet pallets 1 of this kind. In other words, a part of production line for other goods was diverted to produce sheet pallets. Accordingly, the productivity was low and mass production was impossible. In addition, it was quite difficult to produce sheet pallets of various sizes and shapes.
The invention has been accomplished for the purpose to solve the above problems. It is, therefore, the object of the present invention to provide an apparatus for manufacturing sheets, which apparatus is high in productivity and which is possible to produce sheets of various sizes with low labor cost.
DISCLOSURE OF INVENTION
In order to attain the above object, the present invention provides an apparatus comprising a feeding means for feeding sheet materials having corner parts, a forming means for forming the sheet materials into a predetermined shape with at least cutting the corner parts thereof and a storing means for storing the formed sheets.
The above feeding means may be provided with a web forming means to form a strip of web material made of a synthetic resin and a sheet material forming means to form sheet materials by cutting the sheet web. This sheet material forming means may comprise a first cutting means to trim the sheet web into a predetermined width and a second cutting means to cut the trimmed web into predetermined length.
Furthermore, the above-mentioned feeding means may be provided with a web supplying means to feed a previously formed strip of web of a predetermined width and a third cutting means to cut the web into a predetermined length. Or the feeding means may be provided with a storing section to store the sheet materials of a predetermined shape and a delivery means to take out the sheet materials from the storing section.
The above forming means may have a corner cutting means to cut corner portions of the sheet material and a score forming means to form a folding score in the periphery of the sheet material.
With the above-described apparatus, a feeding step to feed sheet materials in a predetermined shape and having corner parts, a forming step to form sheets of desired shape by cutting the corner parts of sheet materials, and a stacking step can be carried out continuously.
BRIEF DESCRIPTION OF DRAWINGS
FIGS. 1 to 13 show a first embodiment of the present invention, wherein
FIGS. 1 and 2 are schematic side views of a sheet pallet manufacturing apparatus;
FIGS. 3A and 3B are a side view and a plan view of a pulling device;
FIGS. 4A and 4B are a side view and a plan view of a web cutting device;
FIG. 5 is a perspective view of a stacking device;
FIGS. 6A and 6B are a plan view and a side view of a sheet feeding device;
FIGS. 7A and 7B are a plan view and a side view of a punching device;
FIG. 8A is a plan view of a sheet pallet which was made by punching a sheet material with a punching device;
FIG. 8B is a partial cross-sectional view of a blade portion of the punching device;
FIGS. 9A and 9B are a plan view and a side view of a folding device (tab portion forming
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Nguyen Khanh P.
Nippon Petrochemicals Company Limited
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