JP2642653B2 - Cutting method and cutting device used therefor - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an object to be cut, such as a hot-melt polymer,
The present invention relates to a cutting method for efficiently cutting into a predetermined shape using a heated wire and a cutting device used for the method.

Technical background of the invention and its problems For example, when mass-producing containers made of a hot-melt polymer such as styrofoam, a plate-like shape having a large number of concave portions 2 for containers as shown in FIG. Object to be cut 4
First, a plurality of sheets are superimposed on a lower mold 6, and a heated heating wire 8 is pressed from above, and a plate-shaped object to be cut 4 is formed on the wire 8 as shown in FIG. Along the way, the container was partially melted to obtain a container composed of a large number of sections 4a.

However, in the cutting method according to the conventional example and the conventional cutting apparatus used in the cutting method, since the plate-shaped object 4 is simply placed on the lower mold 6, the heating wire 8 Due to the pressing, the cut bodies 4 are displaced from each other, and there is a possibility that the section 4a cannot be cut into a predetermined shape or a cut surface becomes oblique. In particular, in recent years, there has been an increasing demand for accurately and easily cutting an object to be cut made of a hot-melt polymer such as styrene foam into a predetermined shape. An optimal cutting device was required.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a first object of the present invention is to provide a cutting method capable of cutting an object to be cut into a predetermined shape accurately, easily, and in a large amount.
The purpose of.

It is a second object of the present invention to provide an optimum cutting device when performing the above cutting method.

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a cutting method for cutting a cut object into a plurality of pieces by pressing a heated wire rod on the cut object. In a state where the cut body is fixed between the upper mold and the lower mold,
Pressing the heated wire against the object to be cut, and pressing the heated wire from the lower side in the vertical direction of the object to be cut into the upper die direction, thereby cutting the object to be cut into pieces. .

Further, the cutting device according to the present invention, in order to achieve the second object, a lower die on which a plate-shaped object to be cut is placed, and can move up and down relative to the lower die, An upper die capable of pressing the object to be cut placed on the lower die from above with a constant pressure; a lower cutting groove formed in the lower die and an upper cutting groove formed in the upper die And a heating wire that cuts the object to be cut by pressing the object to be cut from the lower side in the vertical direction of the object by heating in the vertical direction of the object to be cut. Features.

According to such a cutting method and a cutting device according to the present invention, for example, the object to be cut is heated while being held between the upper mold and the lower mold, such as a hot-melt polymer. Since the wire to be cut is pressed, the object to be cut is cut into a large number of pieces accurately and easily in a predetermined shape.

In addition, when the heating wire is pressed against the object to be cut from vertically below the object to be cut in the upper die direction, and the object to be cut is cut, the cut surface is particularly clean and the cutting is performed. Since the heating wire is moved into the upper mold later, it is easy to automate the removal of the section from the lower mold.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described based on embodiments shown in the drawings.

1 and 2 are cross-sectional views showing a cutting method according to an embodiment of the present invention, and FIG. 3 is a front view of a cutting apparatus according to an embodiment of the present invention. Common members are given the same reference numerals.

The embodiment shown in FIG. 1 shows a case where a large amount of containers made of a hot-melt polymer are produced. In this embodiment, first, a plate-shaped object to be cut 4 made of a hot-melt polymer or the like, on which a large number of container recesses 2 are formed, is first formed. The object 4 to be cut by the method of the present invention is not limited to polystyrene, polyethylene, polyvinyl chloride, their foams, or other heat-meltable resins, but may be other heat-meltable resins such as rubber and fibers. For example, a phenolic resin, a melamine resin, a polyester resin, or another thermosetting resin is used. As the object 4 to be cut by the method of the present invention, any material that is cut by pressing a heated wire can be used.

Next, a large number of plate-shaped objects to be cut 4 are superimposed on the lower mold 6 (in FIG. 1, the objects to be cut that are superimposed in the middle are omitted). The lower mold 6 is preferably made of an insulating material such as plastic, wood, ceramic or the like.
Has a convex portion 7 conforming to the surface shape of. The lower die 6 is provided with a lower cutting groove 10 for arranging the heating wire 8 heated by energization at a predetermined interval below the body 4 to be cut.

Next, the upper mold 12 is lowered in the direction of the lower mold 6, and the superposed cut bodies 4 are pressed from above with a constant pressure, and these cut bodies 4 are held between the upper mold 12 and the lower mold 6. Fixed to. Upper mold
12 is preferably made of an insulating material like the lower mold 6 and has a concave portion 14 which matches the surface shape of the object 4 to be cut. The upper die 12 has a cutting groove 16 for allowing the heating wire 8 disposed in the cutting groove 10 of the lower die 6 to move upward and be accommodated in the upper die 12. The reason why the upper mold 12 and the lower mold 6 are made of an insulating material is to effectively prevent the heating wire 8 from electrically shooting.

Next, as shown in FIG. 2, the heating wires 8 arranged at substantially equal intervals are heated while being energized.
Are simultaneously moved in the upper mold 12 direction. At that time, the superposed object 4 is partially cut along the wire 8 because the heated wire 8 is pressed, and is cut into a large number of pieces 4a accurately and easily into a predetermined shape. You.

In particular, in the present embodiment, the heating wire 8 is pressed against the object 4 from below in the vertical direction of the object 4 to be cut in the direction of the upper die 12 so as to cut the object 4. The cut surface becomes particularly clean, and the heating wire 8 moves into the cutting groove 16 of the upper die 12 after cutting.
Automation of taking out 4a from the lower die 6 becomes easy. Section
In order to automatically take out the 4a from the lower die 6, for example, a fork (not shown) is inserted from the side into the cutting groove 10 of the lower die 6, and the fork is moved upward to lift the section 4a. The sections 4a may be transferred by a fork body. At this time, it is more convenient to take out the section 4a if the heating wire 8 is not located in the cutting groove 10 of the lower die 6.

Note that the cutting method according to the present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

For example, when it is desired to cut the plate-shaped object 4 into a base shape, the heating wires 8 are arranged below the heating wires 8 arranged in parallel at a predetermined interval in a direction perpendicular to the heating wires 8. Alternatively, the heating wire may be linked with the heating wire 8.

In the above embodiment, the heating wire 8 is moved from the lower mold 6 to the upper mold.
Although the object to be cut 4 is cut by moving it in 12 directions, the invention is not limited to this. The object to be cut 4 is cut by moving the heating wire 8 from the upper die 12 to the lower die 6. May be.

Furthermore, the shape of the object 4 to be cut is not limited to a plate shape, and may be another shape. Further, the method of the present invention is not necessarily required to cut the plate-shaped object to be cut 4 which is superimposed, and can be applied to the case where one object to be cut 4 is cut.

Next, a cutting apparatus suitable for carrying out such a method of the present invention will be described based on an embodiment shown in FIG.

The cutting device 20 shown in FIG. 3 has a lower mold 6 and an upper mold 12, which are preferably made of an insulating material, and a heating wire 8 heated by energization. The lower die 6, the upper die 12, and the heating wire 8 are the same members as those shown in FIGS.

The heating wire 8 is held in a wire holding frame 21. The wire rod holding frame 21 can move up and down along the guide pins 22. Before the object to be cut 4 (not shown in FIG. 3) is placed on the lower mold 6, the wire holding frame 21 is set so that the heating wire 8 is accommodated in the cutting groove 10. It is preferable to move down to the side 6 and place it. The vertical movement of the wire rod holding frame
Is controlled by

The upper mold 12 can also move up and down along the guide pins 22 with respect to the lower mold 6. The vertical movement of the upper die 12 is performed by a lifting cylinder 24 and a balancing cylinder 25.

According to such a cutting device 20, the above-described method of the present invention can be conveniently performed.

According to the cutting method and the cutting device according to the present invention, in a state where the object to be cut is sandwiched between the upper mold and the lower mold,
Since the heated wire is pressed against the object to be cut, the object to be cut is accurately and easily cut into a large number of pieces into a predetermined shape.

In addition, when the heating wire is pressed against the object to be cut from vertically below the object to be cut in the upper die direction, and the object to be cut is cut, the cut surface is particularly clean and the cutting is performed. Since the heating wire is moved into the upper mold later, it is easy to automate the removal of the section from the lower mold.

[Brief description of the drawings]

1 and 2 are cross-sectional views showing a cutting method according to an embodiment of the present invention, FIG. 3 is a front view of a cutting apparatus according to an embodiment of the present invention, and FIGS. FIG. 4 ... object to be cut, 6 ... lower mold 8 ... heating wire, 10, 16 ... groove for cutting

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 51-35465 (JP, U) Japanese Utility Model Showa 51-19087 (JP, U) Japanese Utility Model Showa 43-14625 (JP, Y1)

Claims (3)

(57) [Claims] 1. A cutting method for cutting a body to be cut into a plurality of pieces by pressing a heated wire rod on the body to be cut, wherein the body to be cut is placed between an upper mold and a lower mold. In a fixed state,
Pressing the heated wire against the object to be cut, and pressing the heated wire from the lower side in the vertical direction of the object to be cut into the upper die direction to cut the object into pieces. Cutting method. 2. A heated wire rod is pressed from the vertically lower side of the object to be cut toward the upper mold in a state where a plurality of plate-shaped objects to be cut are stacked between an upper mold and a lower mold. The cutting method according to claim 1, wherein the plurality of cut objects are cut into a plurality of pieces at the same time. 3. A lower mold on which a plate-shaped object is placed, and a vertically movable relative to the lower mold, and the object placed on the lower mold is fixed from above. An upper die that can be pressed with pressure, and a lower cutting groove formed in the lower die and an upper cutting groove formed in the upper die are vertically movably arranged, and heated by energization during cutting. And a heating wire for cutting the object by pressing the object from below in the vertical direction toward the upper die.