JP2020001110A - Block material cutting device - Google Patents

Abstract

To provide a block material cutting device that can reduce time required for cutting a block material, reduce loads on heating wire and suppress power consumption during cutting.SOLUTION: A cutting device 1, which cuts off a cuboidal block material formed of synthetic resin foam, comprises: a conveying part 2 that conveys the block material in a horizontal direction; a pair of support parts 3 and 3' oppositely arranged at both sides in a conveying direction of the conveying part 2; and heating wire 4, hung in a direction orthogonal to the conveying direction across the pair of support parts 3 and 3', to which electricity is conducted. The conveying part 2 has a placement surface 9 formed in a nearly rectangular shape in a planar view, on which the block material is placed so that a longitudinal direction of the block material is parallel to a direction in which the heating wire is hung across, where the longitudinal direction of the placement surface 9 is parallel to the direction in which the heating wire 4 is hung across and a transverse direction of the placement surface 9 is parallel to the conveying direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a block material cutting device for cutting a block material made of a synthetic resin foam into a predetermined size.

  Background Art Synthetic resin foams such as styrofoam are used in various industrial fields such as containers for storing agricultural and marine products, cushioning materials for various products, and building materials for construction. Since synthetic resin foams have high heat insulating properties, for example, in the field of construction, a plate-like material (hereinafter, referred to as a board material) embedded in a wall or the like is used as a heat insulating material for a house or the like.

  2. Description of the Related Art Conventionally, a board material made of a synthetic resin foam is manufactured by cutting a block material to a predetermined thickness by various cutting devices (for example, see Patent Document 1). A conventional cutting device will be described with reference to FIG. The cutting device 11 shown in FIG. 5 includes a transport unit 12 that transports the block material, a pair of support units 13 and 13 ′ installed on both sides of the transport unit 12 in the transport direction, and a pair of support units 13 and 13 ′. And the heating wire 14 that is bridged. The block material 20 is a rectangular parallelepiped in a plan view, and the block material 20 is cut by passing through the heated heating wire 14 to obtain a board material.

JP-A-11-156800

  As shown in FIG. 5, in the cutting method using the conventional cutting device, first, the block material 20 is placed on the placement portion on the upstream side in the transport direction with respect to the heating wire 14 of the transport unit 12. The block material 20 is placed with the short side of the rectangular shape in plan view facing the heating wire 14. Thereafter, the block material 20 is manually or automatically transported in the transport direction (Y direction in FIG. 5). By transport, the block material 20 is cut from one short side surface 20a to the other short side surface 20a '. However, in this cutting method, the cutting distance by the heating wire is long, and the cutting time tends to be long. If the cutting time is long, the load on the heating wire increases, and the power consumption accompanying the energization of the heating wire may increase.

  The present invention has been made in view of such a background, and can reduce a cutting time of a block material, reduce a load on a heating wire, and suppress a power consumption at the time of cutting. The purpose is to provide.

  The block material cutting device of the present invention is a block material cutting device that cuts a rectangular parallelepiped block material made of a synthetic resin foam, and a transport unit that transports the block material in a horizontal direction, and both sides of the transport unit in the transport direction. A pair of support portions disposed opposite to each other, and a heating wire that is bridged between the pair of support portions in a direction orthogonal to the transport direction and is conducted, and the transport portion includes the block material. The block material is placed so that the longitudinal direction of the block material is parallel to the bridging direction of the heating wire, has a substantially rectangular mounting surface in plan view, and the longitudinal direction of the placing surface is the bridging direction of the heating wire. And the short direction of the mounting surface is parallel to the transport direction.

  The block material cutting device is characterized in that at least one of the two sides in the transport direction has a guide portion that stands along the transport direction and stands upright with respect to the mounting surface.

  The guide section includes a plurality of rollers arranged in parallel at intervals, and the plurality of rollers are provided such that a rotation axis of each roller is provided in a direction orthogonal to the mounting surface. Features.

  The heating wire is a first heating wire, the block material cutting device has a second heating wire downstream of the first heating wire in the transport direction, and the second heating wire is in the transport direction. It is a heating wire that is bridged and conducted in a direction perpendicular to the direction of the first heating wire and in a direction perpendicular to the bridging direction of the first heating wire.

  The longitudinal length of the placing surface is 1600 to 2400 mm, and the lateral length of the placing surface is 800 to 1200 mm.

  The block material cutting device of the present invention is a cutting device that cuts a rectangular parallelepiped block material made of a synthetic resin foam by a heating wire while transporting the block material by a transport unit, wherein the transport unit cuts the block material in a longitudinal direction of the block material. Has a substantially rectangular mounting surface in a plan view, in which the mounting surface is placed in parallel with the direction in which the heating wire extends, and the longitudinal direction of the mounting surface is parallel to the direction in which the heating wire extends. Since the short side direction is parallel to the transport direction, the block material can be cut from the long side surface at the time of cutting. As a result, the cutting distance of the block material is shortened, so that the cutting time can be reduced as compared with the case where the block material is cut from the short side surface as in the conventional apparatus. Thereby, the load on the heating wire is reduced, and the power consumption at the time of cutting is suppressed.

  Since the block material cutting device has a guide portion that stands upright with respect to the mounting surface along the transport direction on at least one of both sides in the transport direction, the short side surface of the block material is brought into contact with the guide portion. This makes it easy to align the block material in the longitudinal direction. In addition, the guide portion includes a plurality of rollers, and the plurality of rollers are provided in a direction in which the rotation axis of each roller is orthogonal to the mounting surface. It can rotate and reduce the resistance due to the guide portion during transport.

It is a perspective view of the cutting device of the present invention. It is a top view of the cutting device of the present invention. It is a figure for explaining the size of a block material. It is the figure which looked at the state at the time of cutting a block material from the conveyance direction downstream. It is a figure which shows the cutting | disconnection of the block material by the conventional cutting device.

  An example of a cutting device according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the cutting device, and FIG. 2 is a plan view thereof. As shown in FIG. 1, a cutting device 1 includes a transport unit 2 that horizontally transports a block material (not shown) as a transported object, and a pair of support units 3 that are arranged on both sides of the transport unit 2 in the transport direction. , 3 ′ and a heating wire 4 laid between the pair of support portions 3, 3 ′ in a direction orthogonal to the transport direction. The heating wire 4 is stretched horizontally so that the block material can be sliced at a predetermined thickness. The X direction in FIGS. 1 and 2 is the transport direction.

  Further, the cutting device 1 has a heating wire 6 stretched in a different direction from the heating wire 4. As shown in FIG. 1, a pair of support portions 5, 5 ′ are arranged on the downstream side in the transport direction from the pair of support portions 3, 3 ′, and on both sides in the transport direction. A heating wire 6 extends vertically downward from a connection bar 5a connecting the pair of support portions 5, 5 '. The heating wire 6 extends in a direction perpendicular to the transport direction and in a direction perpendicular to the direction in which the heating wire 4 extends. The heating wire 4 and the heating wire 6 are connected to a power supply unit (not shown), and generate heat when energized. In FIG. 1, a heating wire 4 is a first heating wire, and a heating wire 6 is a second heating wire. The cutting device 1 cuts the block material placed on the upstream side in the transport direction from the heating wire 4 of the transport unit 2 by the heating wire 4 and the heating wire 6 and transports the block material downstream from the heating wire 6 in the transport direction. I do.

  In FIG. 1, a transport unit 2 is a belt conveyor that transports a block material in a horizontal direction. Two endless transport belts are stretched over a frame serving as a base material. The top surface (transport surface) of the transport unit 2 includes a belt portion 2b and a belt portion 2c, and a non-belt portion 2a not covered by the transport belt. The belt portion 2b and the belt portion 2c are spaced apart from each other and arranged in parallel. The non-belt portion 2a occupies a substantially central portion in the width direction of the transport surface between the belt portion 2b and the belt portion 2c, and is arranged along the transport direction. One end of a heating wire 6 stretched in the vertical direction is connected to the non-belt portion 2a. A motor 2d is provided at a lower portion of the transport unit 2, and the belt conveyor rotates by driving the motor 2d.

  As shown in FIG. 2, in the cutting apparatus 1 of the present invention, the transport unit 2 has a loading surface 9 on which a block material is placed, on the transport surface on the transport surface upstream of the heating wire 4 in the transport direction. The mounting surface 9 is a mounting position for mounting the rectangular parallelepiped block material such that the longitudinal direction of the block material is parallel to the direction in which the heating wire 4 is passed. The mounting surface 9 is substantially rectangular in a plan view, and the longitudinal direction of the mounting surface 9 is parallel to the direction in which the heating wire 4 is laid, and the short direction of the mounting surface 9 is parallel to the transport direction. The block material is placed in a direction that matches the shape of the placement surface 9. Specifically, the block material is placed such that the longitudinal direction of the block material coincides with the longitudinal direction of the placing surface 9, and the short direction of the block material coincides with the transverse direction of the placing surface 9. As shown in FIG. 2, the mounting surface 9 is provided from a part of the belt part 2b to a part of the belt part 2c, and the block material is mounted over the non-belt part 2a.

  The cutting device 1 of the present invention is different from the conventional cutting device in that the block material can be cut from the long side surface (see FIG. 3). The length in the longitudinal direction of the mounting surface is 1200 to 2500 mm, preferably 1600 to 2400 mm. The length of the mounting surface in the width direction is 600 to 1200 mm, and preferably 800 to 1200 mm. Regarding specific dimensions of the mounting surface, more preferably, the longitudinal length of the mounting surface is 2000 mm, and the lateral length of the mounting surface is 1000 mm. The length of the mounting surface in the longitudinal direction with respect to the length of the mounting surface in the short direction is 1.2 to 3.0 times, preferably 1.5 to 2.5 times, and more preferably 2 to 3.0 times. It is twice. The long side of the mounting surface 9 is disposed at a predetermined distance from the heating wire 4 or the end of the transport unit 2. Further, the short sides of the mounting surface 9 are arranged at predetermined distances from the side edges of the transport unit 2. When a guide section 7 described later is provided on a side edge of the transport section 2, a short side of the mounting surface is arranged along the side edge of the guide section.

  As shown in FIG. 1 and FIG. 2, the cutting device 1 has a guide section 7 on one side edge on both sides in the transport direction of the transport section 2 and standing upright with respect to the mounting surface 9 along the transport direction. The guide portion 7 includes a plurality of rollers 8 arranged in parallel at intervals. The plurality of rollers 8 are provided such that the rotation axes of the rollers are orthogonal to the mounting surface 9 and are rotatable. The direction in which the plurality of rollers 8 are arranged is a direction that matches the transport direction.

  Since the cutting device of the present invention has the heating wire 6 for cutting the long side of the block material, the positioning of the block material in the longitudinal direction is also important. By providing the guide portion 7, the short side surface of the block material can be brought into contact with the guide portion, and the positioning at the time of placing the block material becomes easy. Furthermore, since the guide portion is composed of a plurality of rotatable rollers, even if the block material is conveyed in a state of contact with the guide portion, the resistance becomes small. Note that the guide portions may be provided on both sides in the transport direction. Further, the guide portion may be provided not only on the upstream side in the transport direction than the heating wire 4 but also on the downstream side in the transport direction.

  The block material cut by the cutting device of the present invention will be described with reference to FIG. The block member 10 is made of a synthetic resin foam. The block material 10 can be manufactured by a foam molding method in which a foaming agent is added to an organic resin and molded using a gas generated during heating, or a reactive resin is molded using a gas generated during a reaction. . In the molding method, foam molding can be performed using a conventional mold for production. For example, it can be obtained by subjecting pre-expanded particles to in-mold expansion molding.

  Synthetic resin foams for producing block materials are made of various types of resins such as thermoplastic resins and thermosetting resins, foaming means such as decomposable foaming agents and evaporative foaming agents, and molding methods such as injection foaming and extrusion foaming. A board material obtained by cutting a block material such as a foaming ratio such as a low foaming ratio of 10 to 20 times or less or a high foaming ratio of 40 to 80 times, a bubble structure such as closed or open cells, and drying conditions after molding. Can be selected in various ways depending on the type and use of the device.

For example, when the board material is used as a heat insulating material, particularly a heat insulating material for a wet external heat insulating method, it is desirable that the surface of the board material can be prevented from squashing, dimensional shrinkage due to aging, and warpage. Therefore, after the block material is formed, it is preferable that the block material be cured in a high-temperature drying chamber for a predetermined period (for example, several days) and further cured at room temperature for a predetermined period (for example, several weeks). The density of the block material is preferably 16.5 kg / m ³ or more.

  In the present invention, the synthetic resin foam is selected from a styrene-modified polyethylene resin foam, a polystyrene resin foam, a high-impact polystyrene resin foam, a styrene-ethylene copolymer resin foam, and a polyolefin resin foam. Preferably, it is at least one synthetic resin foam.

  Each dimension of the block material will be described. As shown in FIG. 3, the block member 10 is a rectangular parallelepiped having a length L, a width W, and a thickness T. The length L is longer than the width W, and is a rectangle in plan view. For example, the length L is 1200 to 2500 mm, the width W is 600 to 1200 mm, and the thickness T is 300 to 800 mm. In the cutting apparatus of the present invention, the cutting time is reduced by cutting the block material 10 not from the short side surface 10a but from the long side surface 10b.

  Hereinafter, a method of cutting a block material using the cutting device of the present invention will be described. In the method of cutting the block material 10, first, the block material 10 is placed according to the shape of the placement surface 9 of the cutting device 1. The block 10 is placed such that the longitudinal direction of the block 10 coincides with the longitudinal direction of the placing surface 9, and the short direction of the block 10 coincides with the short direction of the placing surface 9. At this time, the short side surface 10a of the block material is brought into contact with the guide portion 7 to perform positioning, and the long side surface 10b is opposed to the heating wire 4.

  After placing the block material 10, the transport unit 2 is driven to transport the block material with the long side surface 10b as the front surface. The transport speed (roller speed) of the block material 10 during transport is appropriately adjusted so that traces of the heating wire 4 and the heating wire 6 do not remain on the cut surface. The block material is blown off by the heating wire generated by energization. Generally, if the fusing speed is higher than the transport speed of the block material, the cut surface will be melted too much. Also, if the fusing speed is slower than the transport speed of the block material, the cut surface becomes rough. In the conventional cutting method, since the cutting distance of the heating wire is long, an error in the fusing speed between a plurality of metal wires tends to be large, and it is difficult to adjust the transport speed.

  In the cutting method using the cutting device of the present invention, since the block material 10 is cut from the long side surface 10b, the cutting distance of the heating wire is shortened. Therefore, the variation in the fusing speed between the plurality of metal wires is small, and the adjustment of the transport speed becomes easy. The transport speed is, for example, preferably 300 to 400 mm / min, and more preferably 300 to 350 mm / min. If the transport speed exceeds 400 mm / min, traces of the heating wire may remain.

  Here, a state at the time of cutting the block material will be described with reference to FIG. FIG. 4 is a diagram of the block material viewed from the downstream side in the transport direction. The heating wire 4 of the cutting device 1 includes a plurality of metal wires 4a to 4f. Each of the metal wires 4a to 4f is laid parallel to each other and horizontally at different height positions. The intervals between adjacent metal wires are equal to each other. The length of the interval varies depending on the use of the board material and the like, but is, for example, 50 to 100 mm. The number of metal wires in the heating wire 4 is not limited to six in FIG. 4, but may be three or four, for example.

  The heating wire 6 is composed of one metal wire and is stretched in the vertical direction. The heating wire 6 is stretched so as to bisect (center cut) the block material 10 aligned by the guide portion 7 in the longitudinal direction. Specifically, one end of the heating wire 6 is connected to a substantially center position in the width direction of the connection bar 5a, and the other end of the heating wire 6 is connected to a substantially center position in the width direction of the transport surface. Note that the heating wire 6 may be composed of a plurality of metal wires. The heating wire 4 and the heating wire 6 may be metal wires that generate heat when energized, and the type of metal is not particularly limited. As the metal, for example, nichrome or stainless steel is used. The wire diameter of the metal wire is 0.1 to 2.0 mm.

  As shown in FIG. 4, the length of each metal wire of the heating wire 4 is longer than the length of the metal wire of the heating wire 6. Each of these metal wires is stretched with a predetermined tension, but it is preferable that the metal wire of the heating wire 4 be stretched with a larger tension than the metal wire of the heating wire 6. In the cutting device of the present invention, the width direction of the transport unit is wider than that of the conventional cutting device, and accordingly, the length of the metal wire of the heating wire 4 is also longer. Therefore, parallelism can be maintained by applying a relatively large tension.

  In the cutting method using the cutting device 1, since the block material continuously passes through the heating wire 4 stretched in the horizontal direction and the heating wire 6 stretched in the vertical direction, the block material is sliced in the thickness direction. And can be cut in the longitudinal direction. Therefore, the production efficiency of the board material can be improved. In addition, the cut surface cut in the longitudinal direction can be used as a reference surface for the finish cut.

  The block material cutting device of the present invention can reduce the cutting time of the block material, reduce the load on the heating wire, and suppress the power consumption at the time of cutting. Widely used in manufacturing.

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Conveying part 3, 3 'support part 4 Heating wire 5, 5' Support part 6 Heating wire 7 Guide part 8 Roller 9 Placement surface 10 Block material

Claims (5)

Block material cutting device for cutting a rectangular parallelepiped block material made of synthetic resin foam,
A transport unit that transports the block material in a horizontal direction, a pair of support units disposed opposite to each other in the transport direction of the transport unit, and a pair of the support units, which is stretched in a direction orthogonal to the transport direction. And a heating wire to be conducted,
The transport unit has a mounting surface of a substantially rectangular shape in a plan view, in which the block material is mounted so that a longitudinal direction of the block material is parallel to a direction in which the heating wire is extended.
A block material cutting device, wherein a longitudinal direction of the placing surface is parallel to a direction in which the heating wire is passed, and a lateral direction of the placing surface is parallel to the transport direction.   The block material cutting device according to claim 1, wherein the block material cutting device has a guide portion that stands along the conveyance direction and that stands upright with respect to the mounting surface on at least one of both sides in the conveyance direction. apparatus.   The guide portion includes a plurality of rollers arranged in parallel at intervals, and the plurality of rollers are provided such that a rotation axis of each roller is provided in a direction orthogonal to the mounting surface. 3. The block material cutting device according to claim 2, wherein: The heating wire is a first heating wire, and the block material cutting device has a second heating wire on the downstream side in the transport direction from the first heating wire,
The said 2nd heating wire is a heating wire which is bridge | connected in the direction orthogonal to the said conveyance direction, and the direction orthogonal to the bridge | cross direction of the said 1st heating wire, and is electrically connected, The said heating wire is characterized by the above-mentioned. The block material cutting device according to any one of claims 1 to 3.   The longitudinal length of the placing surface is 1600 to 2400 mm, and the lateral direction length of the placing surface is 800 to 1200 mm. 2. The block material cutting device according to claim 1.

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