JPH0740281A - Cutting device for deformed extruded resin molding - Google Patents

Abstract

PURPOSE:To provide a cutting device which can cut a molding without causing cracking and chipping of products and causing chips. CONSTITUTION:A pair of clamps 10, 10 that clamp a molding A from both inside and outside surfaces are disposed opposite to each other with a very small gap between their opposite sides. A drive by which a thin edge plate 34 to be guided by the opposite sides of the pair of clamps 10 is moved toward the molding A being clamped by the clamps 10 is provided. The molding A is clamped by the pair of clamps 10 and the edge plate 34 is moved toward the molding A to pressingly cut the molding A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for a profile extruded resin molded product.

[0002]

2. Description of the Related Art Generally, a modified extruded resin molded product extruded by an extruder (hereinafter referred to as a molded product) is cut into a certain length by the operation of a cutting device provided in an extrusion passage of the molded product. .

Conventionally, a saw blade is rotated to cut a molded product by the saw blade.

[0004]

By the way, in a cutting device using a saw blade, since the cutting blade continuously contacts the molded product, the product is easily cracked or chipped, and a clean cut surface cannot be obtained. There's a problem.

Further, since the cutting powder is scattered around, dust collecting equipment is required, and the cutting powder is liable to be electrostatically adhered to the product, and it is difficult to remove the adhered cutting powder, and high noise is generated. There is also the problem of doing.

The present invention solves the above-mentioned problems, and a cutting device capable of cutting a molded product extremely effectively without causing cracks or chips in the product, and without generating chips or noise. Is a technical issue.

[0007]

In order to solve the above-mentioned problems, according to the present invention, a pair of clamp metal fittings which are opposed to each other with a minute gap between the side surfaces and which holds a deformed extruded resin molded product from both inner and outer surfaces thereof. And a thin blade plate which is guided by the opposing side surfaces of the clamp metal fitting to advance and retreat, and cuts the profile extrusion molded product in the width direction at the time of forward movement.

Further, in order to suppress the contact wear between the pair of clamp fittings and the blade plate,
A plurality of nozzles are provided which are opened in the blade plate guide surface and inject compressed air toward the blade plate from the openings. Here, the compressed air preferably contains a small amount of oil in order to reduce the cutting resistance of the blade plate.

[0009]

The cutting device having the above structure holds the molded product by the pair of clamp fittings, advances the blade plate with respect to the molded product, press-cuts the molded product with the blade plate, and holds the pair of clamps. Prevents the blade plate from buckling and deforming due to the metal fittings.

When a plurality of nozzles are provided on the pair of clamp fittings, the contact pressure between the blade plate and the pair of clamp fittings can be kept low by the compressed air flowing out from the nozzles. The contact wear of the metal fitting can be suppressed.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In this embodiment, a cutting device for a molded product A made of a rain gutter is shown.

As shown in FIGS. 1 to 4, the pair of support plates 1a and 1b are arranged to face each other with a required space in between.
A pair of clamp fittings 10 and 10 for sandwiching the molded product A from the inner and outer surfaces are provided on the respective support plates 1a and 1b.

Each clamp metal fitting 10 includes an upper mold 11 and a middle mold 1.
2 and lower mold 13, and upper mold 11 is a pair of mounting legs 1.
4 at both ends, the mounting legs 14 of which have support plates 1a and 1
It is fixed to b by means such as bolting.

The upper die 11 has a holding surface 15 along the outer surface of the molded article A, while the middle die 12 has a holding surface 16 along the inner surface of the molded article A.

The lower die 13 is long in the direction intersecting with the length direction of the molded product A, and is provided with a holding surface 17 along the outer surface of both ends of the molded product A on the upper surface.

As shown in FIG. 1, a pair of guide pins 18 are provided at both ends of the lower surface of the middle die 12, and the guide pins 18 are slidably inserted into pin holes 19 formed in the lower die 13. .

The center guide pin 2 is provided on the upper surface of the lower mold 13.
0 and a pair of side guide pins 21 on both sides thereof. The center guide pin 20 is inserted into a guide hole 22 formed in the middle die 12, as shown in FIG. An engagement hole 23 is formed above the guide hole 22, and the bottom surface of the engagement hole 23 is the head 2 of the center guide pin 20.
In the range of contacting the lower surface of 0a, the middle mold 12 and the lower mold 13
And can be moved relative to each other in the vertical direction.

Further, a spring accommodating hole 24 is formed in the lower part of the guide hole 22, and a spring 25 incorporated in the spring accommodating hole 24 presses the middle die 12 and the lower die 13 in a direction in which they are relatively separated from each other. ing.

As shown in FIG. 1, the side guide pins 21 are inserted into pin insertion holes 26 formed at both ends of the upper mold 11. The spring accommodating hole 2 is provided above the pin insertion hole 26.
7 is provided, and the spring 28 incorporated in the spring accommodating hole 27 abuts the lower surface of the head portion 21a of the side guide pin 21 to pull up the lower mold 13.

A pair of clamp fittings 1 having the above structure
0 and 10 are arranged so as to face each other in the length direction of the molded product A with a minute interval on the side surface.

The pair of support plates 1a and 1b are connected by a pair of connecting members 30, as shown in FIGS.
The upper part of the guide shaft 31 is fixed to each connecting body 30.

A blade holder 32 is provided between the pair of guide shafts 31.
The slide blocks 33 provided on both sides of the blade holder 32 are slidably supported along the guide shaft 31.

The lower portion of the blade plate 34 is fixed to the upper portion of the blade holder 32. The blade plate 34 has an inclined cutting blade 35 on the upper portion thereof, and the thickness thereof is such that the pair of clamp fittings 10, 10
Is approximately equal to the distance between the opposite side surfaces of the.

Since the blade plate 34 pushes the molded product A completely,
If it is thick, the resistance at the time of cutting becomes large and smooth cutting cannot be performed, and burrs occur on the cut surface of the product.
A thin film having a thickness of 0 mm or less is preferable.

The blade holder 32 is moved back and forth with respect to the molded product A by a crank device 40 as a driving means.

In the crank device 40, a disc 42 is fixed to an end of a drive shaft 41 which is rotated in one direction, and the outer periphery of the disc 42 and the lower part of the blade holder 32 are connected to a crank arm 43.
And the blade holder 3 is rotated by the rotation of the drive shaft 41.
2 is moved up and down.

The blade holder 32 may be moved back and forth by a cylinder instead of the above crank device, and the driving means for moving the blade holder 32 back and forth is not limited to that of the embodiment.

A small diameter shaft portion 31a is formed at the lower end of each of the pair of guide shafts 31 that supports the blade holder 32 so that it can move back and forth, and a rod support piece 50 is slidably provided on the small diameter shaft portion 31a. . The rod support piece 50 is pressed upward by a spring 51 provided below the rod support piece 50. In addition, the rod support piece 50 is pushed by the blade holder 32 and moves down slightly before the blade holder 32 reaches the bottom dead center.

The lower part of the rod 52 is fixed to the rod supporting piece 50. The upper part of the rod 52 is the connecting body 3
It is slidably inserted in the guide hole 53 provided in the No. 0. A bolt 54 is screwed into the upper end of the rod 52, and an upper portion of the bolt 54 is slidably inserted into a hole 55 formed at an end portion of the pair of lower molds 13, and a lower surface of a head portion 54a provided at the upper end is It is engaged with the upper surfaces of the pair of lower molds 13.

The cutting device shown in the embodiment has the above structure, and its operation will be described below.

Now, when the blade holder 32 is lowered by the operation of the crank device 40, both end portions of the lower surface of the blade holder 32 come into contact with the rod supporting piece 50 at a position slightly before the blade holder 32 reaches the bottom dead center. , Blade holder 32
The rod support piece 50 is pushed down by the downward movement of.

When the rod support piece 50 is lowered, the lower mold 13 of the pair of clamp fittings 10 is pulled down via the rod 52, and is moved in a direction away from the middle mold 12.

When the lower die 13 is further lowered, the head portion 20a of the center guide pin 20 is engaged with the bottom surface of the engagement hole 23 of the middle die 12, and the lower die 13 is further lowered from the engaged state, whereby the middle die 12 is moved. Is lowered.

FIG. 3 shows a state in which the blade holder 32 has reached the bottom dead center. The thickness of the molded product A is held between the holding surfaces 15, 16 and 17 of the upper mold 11, the middle mold 12 and the lower mold 13 of the clamp metal fitting 10. The above intervals are formed.

When cutting the molded product A, the molded product A
Is inserted between the holding surfaces 15, 16, 17 of the pair of clamp fittings 10, and in that state, the blade holder 32 is moved up and down by the operation of the crank device 40.

As the blade holder 32 rises, the rod support piece 50 is pushed up by the spring 51, so that the lower die 13 rises via the rod 52. When the lower die 13 rises to a predetermined height, the upper surface of the lower die 13 comes into contact with the lower surface of the middle die 12, and the middle die 12 rises as the lower die 13 rises, and holds the molded product A with the upper die 11.

The blade holder 32 is further raised from the state where the clamp metal fitting 10 holds the molded product A, and the blade plate 34 cuts the molded product A from both ends by the rising of the blade holder 32, and the blade holder 32 is cut as the blade holder 32 is lifted. The position moves from both ends of the molded product A to the central part.

When the blade plate 34 rises to a predetermined height, the apex of the cutting blade 35 of the blade plate 34 comes into contact with the central portion of the molded product A to start cutting. When the blade holder 32 reaches the top dead center, the molded product A is completely cut by the blade plate 34.

When the molded product A as described above is cut, the blade plate 34
Receives cutting resistance, and tries to buckle and deform due to the cutting resistance. At this time, the blade plate 34 is attached to the pair of clamp fittings 1.
Since the molded product A is pushed down while being guided to the opposite side surface of 0, deformation due to buckling is prevented, the molded product A is moved in a direction orthogonal to the longitudinal direction, and the molded product A is satisfactorily cut. .

Further, since the blade plate 34 is thin and thick, burrs are less likely to occur, and an extremely clean cut surface can be obtained.

After cutting the molded product A, the blade plate 34 moves backward,
When the blade holder 32 reaches the bottom dead center, the pair of clamp fittings 10 releases the holding of the molded product A.

When cutting a molded product extruded by an extruder using the above cutting device,
The cutting device is placed in the extrusion path of the molded product and movably supported in the extrusion direction of the molded product, so that when the pair of clamp fittings holds the molded product, the cutting device moves together with the movement of the molded product. .

In the examples, a rain gutter was shown as the profile extrusion resin molded product A, but the molded product A is not limited to this. Here, the molded product A except for the hollow one is
It means that the plate is bent. The number and shape of the molds of the clamp fitting 10 are determined according to the shape of the molded product A.

6 and 7 show another embodiment of the cutting device according to the present invention. In this embodiment, a plurality of counterbores 60 are provided on a guide surface for guiding the movement of the blades 34 of the upper mold 11 and the lower mold 13 in the clamp fitting 10, and a nozzle 61 for injecting compressed air is provided on the bottom surface of each counterbore 60. Is opened.

Since other structures are the same as those in FIGS. 1 to 5 described above, the same parts are designated by the same reference numerals and the description thereof will be omitted.

As described above, when the clamp metal fitting 10 is provided with the plurality of nozzles 61 and the compressed air is jetted from each nozzle 61, the compressed air flows between the clamp metal fitting 10 and the blade plate 34 facing each other. Since a film is formed, the contact pressure between the blade plate 34 and the clamp fitting 10 can be kept low by the air film. Therefore, the blade plate 3
It is possible to suppress the contact wear between the blade 4 and the clamp fitting 10, and to move the blade plate 34 smoothly.

If the compressed air contains a small amount of oil, the oil adheres to the cutting edge 35 of the blade plate 34, and
The cutting resistance of the blade plate 34 becomes small, and the molded product A can be smoothly cut.

[0048]

As described above, according to the cutting apparatus of the present invention, the thin blade plate is moved toward the molded product while the molded product is held between the inner and outer surfaces by the pair of clamp fittings. Since the molded product is pushed down, it is possible to effectively cut the molded product without causing cracks and chips, and because it is cut by pressing,
There is no generation of chips and it is possible to eliminate the need for dust collection equipment.

Further, noise is scarcely generated, and since the cutting is performed by pushing, high cycle cutting is possible.

Furthermore, since the blade plate advances and retracts while being guided by the opposing surfaces of the pair of clamp fittings, it is possible to reliably prevent the blade plate from buckling and deforming due to cutting resistance, and the cutting edge has a linear shape. A clean cut surface can be obtained.

Further, by supplying compressed air from the nozzle between the opposed portions of the pair of clamp fittings and the blade plate, the non-contact pressure between the blade plate and the clamp fittings is reduced by the compressed air film formed between the opposed portions. Since it can be suppressed, contact wear between the pair of clamp fittings and the blade plate can be suppressed.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a cutting device according to the present invention.

FIG. 2 is a partially cutaway side view of the above.

FIG. 3 is a cross-sectional view showing an opened state of a clamp metal fitting of the cutting device.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a sectional view showing a cut state of a molded product.

FIG. 6 is a sectional view showing another embodiment of the cutting device according to the present invention.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

[Explanation of symbols]

 10 Clamp metal fitting 34 Blade plate

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[Procedure amendment]

[Submission date] October 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction content]

[0051] Further, by supplying compressed air between the opposing portions of the pair of clamping brackets and the blades from the nozzle, a low contact Sawa圧blade plate and the clamp bracket by compressed air film formed between the opposing portions Since it can be suppressed, contact wear between the pair of clamp fittings and the blade plate can be suppressed.

Claims (3)

[Claims] 1. A pair of clamp metal fittings, which are arranged to face each other with a minute gap between the side surfaces and hold an odd-shaped extruded resin molded product from both inside and outside surfaces, and are guided by the opposite side surfaces of the clamp metal fittings to advance and retreat. A device for cutting a profile extruded resin molded product, comprising a thin blade plate for cutting the extruded molded product in the width direction. 2. The apparatus for cutting a profile extruded resin molded product according to claim 1, wherein each of the pair of clamp fittings has an opening in a blade plate guide surface, and compressed air is jetted from the opening toward the blade plate. Cutting device for odd-shaped extruded resin moldings with multiple nozzles. 3. The apparatus for cutting a profile extruded resin molded product according to claim 2, wherein the compressed air contains a small amount of oil.