JPH09136355A - Hollow board made of synthetic resin processed by ultrasonic welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the entry of dirt and various bacteria into the hollow part by forming a sealing with a continuous line prepd. by press contact and ultrasonic welding of both surface and back face sheets of the edge side of a hollow board on the edge side of the hollow board made of a thermoplastic resin prepd. by integrating both surface and back face sheets through ribs. SOLUTION: A hollow board 1 is prepd. by forming integrally a surface sheet 2a and a back face sheet 2b both made of a thermoplastic resin through ribs 3 made of the same material and has a hollow inside 4 divided by the ribs 3 between the surface and the back face sheets 2a and 2b. The edge sides of the surface sheet 2a and the back face sheet 2b of the hollow board 1 are bonded in a line by press contacting the surface sheet 2a and the back face sheet 2b of the opening end part formed on the apex sides of the ribs 3 and 3 in a continuous line from the one side or both sides and acting ultrasonic wave on the contact face of the press contact line 5 to perform heat welding of the contact faces of the surface and the back face sheets 2a and 2b. A sealing 6 prepd. by welding of the surface and back face sheets 2a and 2b is formed on the edge side on the hollow board 1 formed like this and the hollow inside is tightly sealed thereby.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various forms of thermoplastic resin hollow boards used as packaging materials such as boxes, partitioning materials, and construction materials such as walls. The present invention relates to a processed hollow board.

[0002]

BACKGROUND OF THE INVENTION Hollow dumpler boards, which are made by integrally molding front and back sheets made of thermoplastic synthetic resin through a plurality of ribs, are used as packing materials for boxes and other construction materials such as partitions and walls. It is widely used in various fields.

[0003]

In the conventional hollow dumpler board of this kind, impurities such as dust and various germs enter the hollow inside of the board because the front and back sheets on both edges of the rib are open between the sheets. It is easy to clean, and since the dirt inside the hollow is virtually uncleanable, it cannot be used as a material for packaging boxes such as foods, medical products, and cosmetics, which have strict hygiene standards.

When using this type of hollow board as a packaging material, it is necessary to form a groove or a concave surface on the plate surface, or to form a folding line or an opening. For these processes, press work and hot plate pressing are conventionally performed, but the folding line by press work has shallow folds and repulsion is too strong, so when assembling in a box,
After assembly, various disadvantages occur. Further, when the punching opening is formed by pressing, the edge of the opening is opened, so that impurities such as dust enter the inside of the hollow. In addition, the above processing using a hot plate will melt the front and back sheets on both sides of the pressure contact part on the side of the hot plate,
There was a problem that the board had many holes.

Further, as a means for joining the hollow boards to each other, or as a means for joining the hollow board and the frame, conventionally, there are a method using a stopper such as pinning and caulking, and a method in which a hot plate is pressed and fused. Is costly due to the increased number of parts and processing steps, and the latter is similar to the above.
There was a problem that the board had holes.

[0006] Therefore, a first object of the present invention is to provide a hollow board processed so that dust and miscellaneous bacteria do not enter the inside of the hollow.

A second object of the present invention is to provide a hollow board having various continuous lines or fused portions of continuous surfaces on a plate surface by means of heat fusion means utilizing ultrasonic waves (hereinafter referred to as ultrasonic fusion). Especially.

A third object of the present invention is to provide a hollow board having a punched opening formed on the plate surface while ultrasonically fusing.

A fourth object of the present invention is to provide a hollow board assembly in which a plurality of superposed hollow boards are connected by a continuous line fusion portion which can be folded in the transverse direction.

A fifth object of the present invention is to provide a hollow board assembly in which a hollow board body and a frame are joined by a line-shaped fused portion.

[0011]

In order to achieve the above first object, the hollow board of the present invention is provided with a thermoplastic synthetic resin hollow board in which both front and back sheets are integrated through a rib. It is characterized in that both the front and back sheets of the edge are pressure-welded to form a plug of continuous lines that are ultrasonically fused.

In order to achieve the above-mentioned second object, the hollow board of the present invention comprises a thermoplastic synthetic resin hollow board in which front and back sheets are integrated with each other through ribs. It is characterized in that the front and back sheets are pressure-contacted to each other to form a continuous line or a continuous surface recessed by ultrasonic fusion.

The recesses on the plate surface of the hollow board may be formed into a series of foldable groove lines that traverse the plate surface of the hollow board.

In order to achieve the third object, the hollow board of the present invention comprises a thermoplastic synthetic resin hollow board in which both front and back sheets are integrated via ribs. The sheet has an opening or a notch punched out by ultrasonic welding to form a continuous line or continuous surface, and the edges of the punched opening or notch are fused to both the front and back sheets. It is characterized by being blocked by.

In order to achieve the above-mentioned fourth object, the hollow board of the present invention comprises a plurality of thermoplastic resin hollow boards in which both front and back sheets are integrated via ribs. Both the front and back sheets of the hollow board are pressed in a continuous line to be ultrasonically fused, whereby a plurality of hollow boards are foldably connected to each other through the fusion line.

In order to achieve the fifth object, the hollow board of the present invention comprises a thermoplastic synthetic resin hollow board in which both front and back sheets are integrated via ribs, and the hollow board is superposed on the frame of another member. Both the front and back sheets of the hollow board are pressure-contacted to the frame in a continuous line shape and ultrasonically fused.

[0017]

The hollow board is closed at the edge of the hollow board by ultrasonic fusion, so that the inside of the hollow board is hermetically sealed and shielded from the outside air.

The continuous line or the concave portion of the continuous surface of the hollow board formed by ultrasonic fusion has no damage or holes around the concave portion and maintains the hermeticity of the hollow interior. This recess can be used as a mounting and fitting groove for other members, and also used as a handle when a box is manufactured from this hollow board. Further, it is possible to display characters, patterns, markings and the like by utilizing the uneven surface of the plate surface formed by the recesses.

The foldable groove line on the plate surface of the hollow board formed by ultrasonic fusion is such that the repulsive force at the time of folding is soft because the front and back sheets of the hollow board are pressure-bonded in a fused state. Become. Therefore, the work becomes easy when it is assembled as a box or a partition. Also, when used as a hinge, it is easy to open and close, and fatigue of the opening and closing part is small.

The openings or notches punched out while pressing both the front and back sheets of the hollow board under pressure and ultrasonically melting the openings have notches formed at the edges to maintain the airtightness inside the hollow board.

The hollow board formed by ultrasonically fusing the front and back sheets of a plurality of superposed hollow boards in a continuous line is a hollow board which can be opened and closed in any direction by using the fusing line as a hinge. It is constructed into an assembly and can be used as a partition member or a honeycomb structure material.

In the case where the hollow board and the frame material are joined at a continuous line or a continuous surface by ultrasonic fusion, the board and the frame are integrally joined without using other joining members. In addition, the joint ends of the hollow boards to the frame are connected in a closed state.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The hollow board 1 is formed by integrally forming a front sheet 2a and a back sheet 2b, which are made of a thermoplastic resin such as polypropylene or polyethylene, with ribs 3 made of the same material, and is divided by the ribs 3 between the front and back sheets 2a and 2b. It has a hollow interior 4 defined therein. According to the present invention, the front and back sheets 2a and 2b of the hollow board 1 are pressed against each other in a continuous line or continuous plane to apply ultrasonic waves to the front and back sheets 2a and 2b along the pressing line or surface 5. Fused,
Alternatively, it is provided with various hollow boards that are processed into various portable devices by cutting them while fusing.

The hollow board 1 shown in FIGS. 1 and 2 has ribs 3,
The front sheet 2a and the back sheet 2b at the opening end formed on the tip side of 3 are pressed in a continuous line from one side or both sides, and ultrasonic waves are applied to the contact surface of the pressure contact line 5 to form front and back sheets. By heating and fusing the contact surfaces of 2a and 2b, the edges of the front sheet 2a and the back sheet 2b are joined in a line shape. FIG. 1 formed in this way
The hollow board 1 has a sealing member 6 formed by fusing the front and back sheets 2a and 2b on the edge, and the hollow interior 4 is sealed. Therefore, dust and miscellaneous bacteria do not enter the hollow interior 4, and air is sealed inside, so that the strength of the board 1 is increased.

FIG. 3 shows that the front and back sheets 2a, 2b on the plate surface of the hollow board 1 are pressed into contact with each other in a continuous line or continuous plane to apply ultrasonic waves to the front and back sheets 2a, 2b.
The pressure contact line 5 or the pressure contact surface 5'of 2b is heat-fused to form a linear recess 7a or a planar recess 7b on any plate surface of the hollow board 1. The recesses 7a and 7b can be used as attachment fitting portions or handles of other members (not shown), and the unevenness of the plate surface formed by the recesses can be used to make characters on the plate surface. It is also possible to display patterns, markings, etc.

In FIG. 4, the continuous line-shaped concave portion formed in the transverse direction of the plate surface of the hollow board 1 (the direction intersecting with the rib 3 in the figure) is formed in a series of folding groove lines 7c. Similar to the above, the folding groove line 7c is formed by pressing the front and back sheets 2a and 2b on the plate surface in a continuous line to apply ultrasonic waves to the front and back sheets along the press contact line 5. 2a and 2b are heat-fused. In the embodiment of FIG. 4, the folding groove line 7c is formed in the vertical direction of the plate surface, but it may be in the horizontal direction or the oblique direction. This folding groove line 7c is the front surface of the hollow board 1.
Since both back sheets 2a and 2b are fused and polymerized, the repulsive force of folding is reduced, and the fatigue strength when used as a hinge is increased.

Folding groove line 7c of the hollow board 1 of FIG.
May be ultrasonically fused by pressing one side sheet of the board 1 linearly against the other side sheet, but in order to make it easy to fold both sides along the folding groove line 7c, both sides of the board 1 It is desirable to press the sheets 2a and 2b linearly from both sides and ultrasonically fuse them.

FIG. 5 shows an opening 8a punched out by ultrasonically welding the front and back sheets 2a and 2b of the hollow surface 1 to the plate surface of the hollow board 1 in a continuous line-like or continuous surface-like manner.
Alternatively, the notch portion 8b is formed. The opening 8a and the notch 8b can be heat-fused by pressing a predetermined line or a predetermined surface and applying ultrasonic waves, and can be punched out by further applying pressure in a heat-fused state. Also, the opening 8a and the cutout 8b
Is formed by fusion with ultrasonic waves, so that the edge is sealed by the plugging 6, as shown in FIG.

In FIG. 7, a plurality (two in the illustrated example) of hollow boards 1 (a) and 1 (b) are overlapped, and both front and back sheets 2a and 2b (4 sheets) of both boards 1 and 1 are stacked. ) Is pressure-welded to a continuous line in the transverse direction, and the pressure-contact line 5 is joined by ultrasonic heat fusion means to form a connecting portion 9. The hollow board assembly having such a form can be used as a partitioning material or a honeycomb structure inside a box.

FIG. 8 shows both the front and back sheets 2 of the hollow board 1.
a and 2b are pressed against another frame 10 which is preferably made of the same material and pressure-bonded in a line shape, and ultrasonic welding is performed along the pressure-bonding line 5, so that the board 1 and the frame 11 are integrated at the joint portion 11. It is joined. This is used as a member integrally connecting the side plate of the box and the reinforcing frame.

In the embodiment shown in FIGS. 1 and 3, the hollow board 1 is used.
Although only one side sheet (front sheet 2a) is squeezed and the other side sheet (back sheet 2b) is fused, the front and back sheets 2a and 2b are squeezed from both sides as shown in FIG. You may fuse together.

[0032]

[Effect] The present invention has a plugging, a line-shaped or surface-shaped recess,
We provide various types of hollow boards that have undergone processing such as fold-in groove lines and fusion punching parts.These processed parts press the front and back sheets of the hollow board together in a continuous line or continuous surface. Since it is formed by fusing with frictional heat generated by ultrasonic waves, the number of processing steps is small, and since no other member is required, the cost can be kept low. Further, since only the portion to be fused is heated by ultrasonic waves, there is no possibility that the sheet around it will be damaged by heat.

Since the above-mentioned processed portion of the hollow board is formed as a sealed body, dust and miscellaneous bacteria do not enter the hollow inside of the board. Therefore, since it is not necessary to wash the inside of the hollow, it can be widely used as a packaging material for foods, medicines, cosmetics, etc., which could not be used conventionally from the viewpoint of hygiene.

Further, since the processed portion is formed in a hermetically sealed state, the mechanical strength of the board itself is remarkably increased and a heat insulating effect is also obtained.

Since the folding groove line of the board according to the present invention is deeply folded and is formed by fusing the front and back sheets, the repulsive force of folding is soft. Therefore, the work when assembling into a box becomes easy, and
When used as a hinge for the opening of the box, it is easy to open and close, and there is little fatigue on the folding line.

When a plurality of boards are connected by a pressure welding line, a series of board assemblies can be formed only by an ultrasonic welding process. Each side of the boards joined in this way has an arbitrary angle, and various types of assembling as a partition material or a honeycomb structure material are possible.

The connection of the board to the frame is facilitated and the connection strength is improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a hollow board according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a cross-sectional view of a hollow board according to another embodiment of the present invention.

FIG. 4 is a perspective view of a hollow board according to another embodiment of the present invention.

FIG. 5 is a plan view of a hollow board according to another embodiment of the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a perspective view of a hollow board according to another embodiment of the present invention.

FIG. 8 is a perspective view of a hollow board according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hollow board, 2a ... Front sheet, 2b ... Back sheet, 3 ... Rib, 4 ... Hollow interior, 5 ... Pressure contact line, 5 '... Pressure contact surface 6 ... Closure, 7a ... Line-shaped recess 7b ... Surface recess 7c ... Folding groove line, 8a ... Opening portion 8b ... Notch portion 9 ... Connecting portion, 10 ... Frame, 11 ... Joining portion.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 31:10

Claims (6)

[Claims] 1. A continuous line formed by ultrasonically fusing the front and back sheets of said edge to the edges of a thermoplastic synthetic resin hollow board in which the front and back sheets are integrated by ribs. Hollow board formed by blocking 2. A continuous line in which the front and back sheets of the plate surface are pressed against each other and ultrasonically fused to the plate surface of a thermoplastic synthetic resin hollow board in which the front and back sheets are integrated via a rib. Or, a hollow board formed by forming a recess on a continuous surface 3. The hollow board according to claim 2, wherein the recess formed on the plate surface of the hollow board is a series of folding groove lines that cross the plate surface of the hollow board. 4. The front and back sheets are ultrasonically melted by pressing the front and back sheets into a continuous line or continuous surface on the plate surface of a thermoplastic synthetic resin hollow board in which both the front and back sheets are integrated via ribs. Hollow board punched out while wearing, having openings or notches with closed edges 5. A thermoplastic resin hollow board in which both the front and back sheets are integrated with each other via a rib is superposed, and the front and back sheets of the plurality of superposed hollow boards are pressed in a continuous line shape. Hollow board made by ultrasonic fusion 6. A thermoplastic synthetic resin hollow board in which front and back sheets are integrated via ribs is laid on a frame of another member, and the front and back sheets of the hollow board are continuously lined or continuous to the frame. Hollow board that is pressed against a surface and ultrasonically fused