JPH05200853A - Forming apparatus for bending groove in foamed synthetic resin plate - Google Patents

Abstract

PURPOSE:To cleanly and rapidly form a bending groove to a foamed synthetic resin plate like small wooden box material. CONSTITUTION:A grooving roll 1 having one or more annular blade 1a whose outer periphery is sharpened into a chevron shape formed thereon is supported on the circumferential part of a metal disc or cylinder in a state freely rotated by the shaft 3 piercing the parallel sides 2a, 2b of a steel support frame 2 having a horizontal U-shape planar shape so as to be positioned between the parallel sides 2a, 2b. This grooving roll 1 is heated to proper temp. by the ceramic heater 5 built in the support frame 2 to apply the annular blade 1a to a foamed synthetic resin plate 8 and, by moving the foamed synthetic resin plate 8 or the grooving roll 1, the foamed synthetic resin plate 8 is thermally melted by the annular blade 1a of the tumbling grooving roll 1 to form a bending groove 8a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, for example, in the process of manufacturing a folding box using a foamed synthetic resin plate, forms one or a plurality of bending grooves on the back surface of the foamed synthetic resin plate to bend the corners. The present invention relates to a bent groove forming device for a foamed synthetic resin plate, which is used in some cases.

[0002]

2. Description of the Related Art A conventional method for forming a bent groove on a foamed synthetic resin plate for a folding box is to make a saw groove with a rotating circular saw, or to arrange two sharp knives in a V shape. In this method, a foamed synthetic resin plate is applied to the plate while moving and cut into a V shape.

[0003]

The above-mentioned conventional method using a circular saw has the following problems. (A) Burrs appear at the edges of the bent groove. (B) Synthetic resin melts and adheres to the bent groove due to cutting resistance. (C) Even if dust is collected, sawdust adheres around the bent groove due to the action of static electricity. (D) The processing speed is slow. (E) The film laminate cannot be processed because the film peels off.

The conventional method using a sharp knife has the following problems. (F) The foaming synthetic resin plate is damaged due to the large cutting resistance. (G) It takes time to adjust when setting the blade. (H) It is difficult to remove because long, continuous chips are produced. (I) The sharpness of the blade does not last long. (G) The film laminate cannot be processed because the film peels off.

An object of the present invention is to solve the above-mentioned problems of the prior art, to form a bent groove forming device for a foamed synthetic resin plate which is quick in processing, produces no chips, has a good finish, and can also process a film laminate material. To provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has one or more annular blades having a chevron-shaped outer periphery formed on the circumferential surface of a metal disc or cylinder. The groove cutting roll is rotatably supported on the support frame at the axial center, the groove cutting roll is heated, the annular blade is applied to the foam synthetic resin plate, and the foam synthetic resin plate or the groove cutting roll is applied. It is an apparatus for forming a bent groove of a foamed synthetic resin plate, which is configured such that when the groove cutting roll rolls, the annular blade heat-dissipates the foamed synthetic resin plate to form a bent groove by moving the grooved roll.

[0007]

[Function] When the annular blade of the groove cutting roll is in a relational position in which the circular blade of the groove cutting roll is about 90% of the thickness of the foam synthetic resin plate and the foam synthetic resin plate or the groove cutting roll is moved, foaming of the portion through which the annular blade passes The synthetic resin plate is melted down by the heat of the annular blade, and no chips are produced, so that a bent groove with a beautiful finish can be formed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a side view of an embodiment of the present invention,
2 is a view of FIG. 1 viewed in the direction of arrow P, and FIG. 3 is a view of FIG. 1 also viewed in the direction of arrow Q. In FIG. 2, (1) is a groove cutting roll, which is a high-speed tool. 6 annular blades (1 made of steel or bronze with a chevron-shaped periphery on the circumference)
a) are formed at equal intervals, and the shaft hole penetrates the shaft hole (1b).

Reference numeral (2) is a support frame, which is made of steel and formed in a U-shape when viewed from a plane. A parallel groove (2a) is formed by interposing a groove cutting roll (1) between the parallel edges (2a) and (2b). ) (2b) passes through the shaft (3) made of ceramics at right angles to the shaft hole (1
It is rotatably supported by being inserted through b). (4) is a shaft end cover that covers both ends of the shaft (3).

(5) is a ceramic heater, (5a) is a lead wire, parallel sides (2a) (2b) of the support frame (2)
The groove cutting roll (1) is heated by heating the groove cutting roll (1) through the support frame (2) by supplying electricity from the lead wire (5a). The temperature varies depending on the material of the foamed synthetic resin used for grooving, but in the case of Styrofoam, it is suitable to be around 300 ° C. The number of ceramic heaters (5) is not limited to four according to the setting of the temperature of the groove roll (1), but may be set arbitrarily. Although not shown, a heat insulating cover for preventing heat radiation is provided on the outside of the support frame (2).

If the heating degree of this groove cutting roll (1) is too high, parts other than the groove may be melted away, and if it is too low, the working speed will decrease, so an appropriate temperature is sought by experiments.

Reference numeral (6) is a feed roller, and a pair of upper and lower pairs are installed in parallel in front of and behind the groove cutting roll (1) in the tangential direction of the groove cutting roll (1). This is for sandwiching (8) from above and below and feeding it to the groove cutting roll (1) to perform groove cutting, and to draw out the completed groove cutting. Reference numeral (7) is a support roller, which is directly below the groove cutting roll (1) and supports the foamed synthetic resin plate (8) during groove cutting.

In this case, the relative position between the groove cutting roll (1) and the foam synthetic resin plate (8) is such that the annular blade (1a) bites into about 90% of the thickness of the foam synthetic resin plate (8). Be positioned at.

With the above construction, the feed roller (6) is driven to move the grooved roll (1) from the front of the grooved roll (1) to the foamed synthetic resin plate (8), which is a folded box material, of the grooved roll (1). When it is fed in the direction, the six annular blades (1a) that are heating come into contact with the foamed synthetic resin plate, and the groove cutting roll (1)
While melting the foamed synthetic resin plate (8),
As shown in FIG. 4A, six V-shaped bent grooves (8a) having a depth of approximately 90% of the thickness are formed on the back surface of the foamed synthetic resin plate (8).

Since a decorative film is laminated on the surface of the foamed synthetic resin plate (8) which is the folding box material, even if the bending groove (8a) has almost the same thickness, the bending groove (8a) is not covered with the folding groove (8a). The foamed synthetic resin plate (8) does not break.

When the foamed synthetic resin plate (8) is bent along the six bending grooves (8a) in this manner, it can be bent into a neat round shape as shown in FIG. 4B.

FIG. 5 shows an example in which a folding box is bent at a right angle, and one folding groove (8a) as shown in A is formed by using a groove cutting roll having a 90 ° annular blade. For example, it can be bent at a right angle as shown in B.

The groove-cutting roll (1) may be heated by using other heating means such as hot air in addition to the above-mentioned electric heat. Further, the bending can be performed in various angles and shapes by setting the angle and the number of bending grooves (8a) other than the illustrated round bending and right-angled bending. Further, although the foam synthetic resin plate (8) is moved in the above embodiment, the bent groove can be similarly formed by moving the groove cutting roll (1).

[0019]

According to the bending groove forming device for a foamed synthetic resin plate according to the present invention described above, the bending groove is formed by melting the foamed synthetic resin plate by heat to form a bending groove. Compared to cutting with a knife or knife, burrs do not occur, processing is quick and work efficiency is good, working environment is good because no chips are generated, and chips do not adhere to the periphery of the bending groove due to static electricity. It has many characteristics that a beautiful finish can be obtained, and that even a film laminate material can be processed at the same time because the film is also melted away.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1 viewed from a direction of an arrow P.

FIG. 3 is a plan view of FIG. 1 viewed from a direction of an arrow Q.

FIG. 4 is a diagram showing a state where the corners of the folding box material are bent into a round shape.

FIG. 5 is a view showing a state where the corners of the folding box material are bent at right angles.

[Explanation of symbols]

 1 Grooving Roll 1a Annular Blade 2 Support Frame 3 Shaft 5 Ceramic Heater 8 Foam Synthetic Resin Plate 8a Bending Groove

Claims (1)

[Claims] 1. A grooved roll having one or more annular blades whose outer periphery is sharpened in a chevron shape is formed on the circumference of a metal disc or cylinder so that it can be rotatably supported by a support frame at its axial center. A foamed synthetic resin plate, which is configured to pivotally support the groove cutting roll, heat the groove cutting roll, and apply the annular blade to the foamed synthetic resin plate to move the foamed synthetic resin plate or the groove cutting roll. Bending groove forming device.