KR101542445B1 - Recycling apparatus for waste prefabricated panel - Google Patents

Abstract

The present invention relates to a waste prefabricated panel recycling apparatus. The waste prefabricated panel recycling apparatus includes: a work table mounting a waste prefabricated panel on the upper surface; a pair of separation means which is installed on a side of the exterior of the work table in the vertical direction while having a predetermined gap therebetween and separates the upper and lower exterior members of the waste prefabricated panel received from the work table in the outward direction of the insulation member; and a guide convey means which is installed on the rear side of each separation means and moves the upper and lower exterior members separated in the outside direction of the insulation member. The present invention can separate the upper and lower exterior members and the insulation member of the waste fabricated panel from each other and processes and recycles the insulation material to a board-shaped finished product. Accordingly, the present invention does not need multiple processing operations to process the conventional crushed insulation member pieces to the board-shaped finished product, thereby reducing the number of steps in the process and processing costs. The present invention also separates and recycles the upper and lower exterior members and the insulation member of the waste fabricated panel to reduce the environmental pollution caused by waste treatment of waste prefabricated panels and reduces costs arising caused by the waste treatment.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recycling apparatus for waste prefabricated panel,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recycling apparatus for a waste assembly panel, and more particularly, to a recycling apparatus for a waste assembly panel in which a heat insulating material filled between upper and lower casing members and upper and lower casing members can be separated from each other, .

In general, the panel is a panel in which a foamed PS resin, Styrofoam, is embedded as an insulator, and then a relatively thin layer of hot-dip galvanized steel is adhered to both sides thereof.

These prefabricated panels have excellent economical efficiency, excellent workability, excellent waterproof / dewproofing effect, and excellent heat insulating property, except for the parts vulnerable to fire, so that various prefabricated buildings (factory, warehouse, It is mainly used.

On the other hand, the dismantled panel can be recycled by separating the styrofoam and the zinc sheet attached to both sides of the styrofoam.

Conventionally, in order to separate a zinc sheet from a styrofoam of a waste assembled panel, a worker removes a styrofoam and a zinc sheet by hand-pulling a part of the edge of the zinc sheet with the waste assembled panel fixed on the foot.

However, such a manual separation operation requires considerable workforce and work time, which is not only ineffective, but also causes a secondary environmental pollution by blowing of the pieces of the styrofoam during the work process, and a safety accident occurs in the separation process of the zinc sheet There is a risk inherent.

For this reason, recently, a prefabricated panel is passed through a compression roller to break the styrofoam filled in the zinc sheet, the wedge-shaped blade is passed through the shredded foam to separate the zinc sheet, and then the styrofoam pieces remaining on the inner surface of the zinc sheet are removed A method of recycling only a zinc sheet has been proposed.

However, since the styrofoam is shredded by the wedge-shaped blade in the process of separating the zinc sheet, the styrofoam can not be recycled as a finished product in the form of a board.

On the other hand, the styrofoam pieces separated from the galvanized steel sheet are processed in the form of ingot raw material through a first depressurization process, and then subjected to a process such as secondary compression, molding and injection, Or incinerate the same, and thus incur additional costs and environmental pollution.

Korean Patent Laid-Open Publication No. 2013-0017637 " Resource Recycling and Waste Recovery Device and Method Using Waste Sandwich Panel "

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above. It is an object of the present invention to provide a method of separating a pair of exterior materials and a heat insulating material of a waste assembly panel, And to provide a recycling apparatus for a waste assembled panel.

According to an aspect of the present invention, there is provided a recycling apparatus for recycling a heat insulation material by separating the upper and lower exterior materials of the assembled panel filled with a heat insulating material between upper and lower exterior materials and the upper and lower exterior materials, And the upper and lower outer casings of the waste assembly type panel are separated from each other by a predetermined distance in the vertical direction on the outer side of the work table, And a guide conveying means provided behind the pair of separating means and each separating means for conveying the upper and lower exterior materials separated in the outer direction of the heat insulating material to the rear.

It is preferable to further include at least one pressing and conveying means provided in front of the separating means for conveying the waste assembled panel in the direction of the separating means as it presses and rotates one side of the outer surface of the waste assembled panel Do.

The pair of separating means is disposed at a position corresponding to the boundary between the upper casing and the heat insulating material of the pneumatic assembly panel, A pair of body portions formed with guiding slopes in the outward direction from the front ends thereof, and extending from one end of each of the body portions along the guide slope to one side of the bottom surface, protruding outwardly of the body portion, It is more preferable to include at least one blade portion provided so as to be spaced apart from each other at a predetermined interval along the direction.

It is further preferable that the pair of separating means further comprises a vertical movement force providing unit coupled to one side of the pair of body units and providing a vertical movement force to each of the body units.

The pair of separating means may further include a forward and rearward movement force providing unit coupled to the rear ends of the pair of body parts and providing the pair of body parts with a forward and backward movement force.

It is further preferable that the apparatus further comprises pressure fixing means provided at the upper and lower portions of the work table and pressing and fixing the upper and lower surfaces of the pulley assembly type panel.

It is further preferable that the guide conveying means further includes a desorption section for desorbing a piece of the heat insulating material remaining on one surface of the upper and lower casing materials separated by the pair of separating means in the outer direction of the heat insulating material from the upper and lower casing materials .

At least one first surface machining means provided behind the pair of separating means for cutting the heat insulating material from which the upper and lower outer sheaths are separated in the thickness direction and a second surface machining means provided at the rear of the first surface machining means, And at least one second surface processing means for cutting the heat insulating material from which the upper and lower exterior materials are separated in the width direction.

According to the present invention as described above, after the upper and lower outer casings of the waste assembly panel are separated from the heat insulating material, the heat insulating material is processed into a board finished article and recycled, thereby processing the board into a finished article using a conventional piece of the heat insulating material It is possible to reduce the work flow and the machining cost.

In addition, by separating and reusing the upper and lower exterior materials of the waste assembled panel and the heat insulating material, it is possible to prevent the environmental pollution caused by the waste treatment of the waste assembled panel and to reduce the cost caused by the waste treatment.

1 is a schematic side view of an apparatus for recycling a waste assembled panel according to an embodiment of the present invention.
2 is a schematic view showing an upper separating means of a recycling apparatus for a waste assembled panel according to an embodiment of the present invention.
FIG. 3 is a schematic view showing a pressurizing and fixing means of a recycling apparatus for a waste-assembled panel according to an embodiment of the present invention.
4 is a schematic view showing a first surface processing means and a second surface processing means of a recycling apparatus for a waste assembled panel according to an embodiment of the present invention.
5A to 5C are operation diagrams sequentially showing the initial operation of the separating means before the waste assembled panel is inserted in the separating means direction.
FIG. 6 is a schematic view showing an operating state of a recycling apparatus for a waste assembly panel according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. It is to be noted that like elements in the drawings are represented by the same reference numerals as possible. Further, detailed description of known functions and configurations that may unnecessarily obscure the gist of the invention will be omitted.

FIG. 1 is a schematic side view of a recycling apparatus for a waste-assembled panel according to an exemplary embodiment of the present invention, FIG. 2 is a schematic view showing an upper separating means of a recycling apparatus for a waste-assembled panel according to an exemplary embodiment of the present invention, FIG. 3 is a schematic view showing a fixing means of a recycling apparatus according to an embodiment of the present invention. FIG. 4 is a side view of a first surface processing means of the recycling apparatus of the present invention, And a second surface processing means.

1 to 4, an apparatus 1 for recycling panel-mounted panels according to an embodiment of the present invention includes an upper and lower casing members 81 and 82, The separating means 20, the pressurizing and fixing means 30, the pressurizing and conveying means 40, the guide conveying means 50, the pressurizing and conveying means 40 and 50, A first face machining means 60, and a second face machining means 70. [

The work table 10 is installed in the work area and provides an area on the upper surface where the pulley assembly panel 80 is seated.

A plurality of guide rollers 11 are installed on the upper surface of the work table 10 so as to be spaced apart from each other along the direction in which the pulverized assembly panel 80 is inserted. The guide roller 11 allows the waste assembled panel 80, which is seated on the upper surface of the work table 10, to be easily inserted in the loading direction.

The separating means 20 is installed on the outer side of the work table 10 at a predetermined distance in the vertical direction and has a front end connected to the upper and lower outer casings 81, And when the waste assembled panel 80 is inserted from the work table 10, the upper and lower enclosures 81 and 82 of the waste assembled panel 80 are separated from each other in the outer direction of the heat insulating material 83 And includes an upper separating means 21 and a lower separating means 22.

The upper separating means 21 separates the upper casing member 81 of the pulmonary assembled panel 80 from the upper surface of the heat insulating member 83. As shown in Figure 2, And includes a blade portion 21b.

The upper body part 21a has a width corresponding to that of the lung assembly panel 80 and is formed with a first guide slope 21aa inclined upward from the lower end toward the rear end upper end, And is disposed between the lower surface of the upper casing member 81 and the upper surface of the heat insulating member 83.

The first guiding slant surface 21aa serves to guide the upper casing member 81 separated from the upper surface of the heat insulating material 83 of the pulmonary assembled panel 80 into the outer direction of the upper separating means 21. [

The upper blade portion 21b extends from one end of the upper body portion 21a to one side of the bottom surface along the first guide slope 21aa and protrudes outwardly of the upper body portion 21a, 21a are spaced a predetermined distance apart from each other.

The upper blade portion 21b comes into line contact with the lower surface of the upper casing member 81 separated from the upper surface of the heat insulating material 83 of the pulverized assembly panel 80. By this pressing force of the pulmonary assembly panel 80, And serves to reduce the load generated in the means (21).

The lower separating means 22 is for separating the lower casing member 82 of the pulmonary assembled panel 80 from the lower surface of the heat insulating member 83. Although not shown in the drawing, the lower casing member 22a, (22b).

The lower body portion 22a has a width corresponding to that of the lung assembled panel 80 and is formed with a second guide slope 22aa inclined downward from the upper end toward the lower end, Is disposed between the upper surface of the lower casing member (82) and the lower surface of the heat insulating material (83).

The second guiding slant surface 22aa serves to guide the upper casing member 81 separated from the lower surface of the heat insulating material 83 of the pulmonary assembled panel 80 into the outer direction of the lower separating means 22. [

The lower knife portion 22b extends from one end of the lower body portion 22a to one side of the bottom surface along the second guide slope 22aa and protrudes outwardly from the lower body portion 22a, 22a are spaced a predetermined distance apart from each other.

The lower knife portion 22b is in line contact with the upper surface of the lower casing member 82 separated from the lower surface of the lung assembly panel 80 so that the lower knife portion 22b is connected to the lower separating means 22 by the pressing force of the pulmonary assembly panel 80, Thereby reducing the load generated.

The separating means 20 is coupled to one of opposite sides of the upper and lower body portions 21a and 22a and moves the upper and lower body portions 21a and 22a in a vertical direction And an up-and-down movement force providing unit 23 for providing the up and down movement force.

The vertically moving force supplying unit 23 includes a first cylinder body 23a disposed between the upper body portion 21a and the lower body portion 22a and a second cylinder body 23b having one end thereof moved inside the first cylinder body 23a And a pair of first cylinder arms 23b which are coupled to each other and to which the other end is coupled to one side of the upper body portion 21a and the lower body portion 22a, and a known hydraulic cylinder can be used.

When the thickness of the pulmonary assembled panel 80 to be injected is variable, the upper and lower body portions 21a and 21a can be adjusted by adjusting the distance between the upper body portion 21a and the lower body portion 22a, Is disposed between the lower surface of the upper casing member 81 of the lung assembled panel 80 into which the tip of the lower assembly body panel 80 is inserted and the upper surface of the heat insulating member 83 and the lower end of the lower assembled panel 80 into which the tip of the lower body portion 22a is inserted And is positioned between the upper surface of the lower casing member 82 and the upper surface of the heat insulating material 83.

The vertical movement force supplying unit 23 is provided with the front and rear moving force providing members 24 by the front and rear moving force providing members 24 before the waste mounting panel 80 seated on the work table 10 is inserted in the direction of the separating means 20, When the front end of the lower body portion 22a and the front end of the lower body portion 21a are inserted between the upper casing member 81 and the lower casing member 82 of the pulley assembly type panel 80, The upper casing member 81 and the lower casing member 82 are initially separated from the upper and lower surfaces of the heat insulating material 83 by moving the upper casing member 22a in the upper and lower directions.

The above operation will be described in more detail with reference to the drawings.

The separating means 20 is connected to the rear ends of the upper body portion 21a and the lower body portion 22a and includes a front body portion 21a and a lower body portion 22a, And a moving force providing unit 24.

The front and rear moving force providing portion 24 includes a second cylinder body 24a disposed adjacent to the rear end of the upper body portion 21a and the lower body portion 22a and a second cylinder body 24b having one end thereof movable within the second cylinder body 24a And a second cylinder arm 24b, the other end of which is coupled to one side of the rear end of the upper body portion 21a and the lower body portion 22a, respectively, and a known hydraulic cylinder can be used.

The front and rear moving force providing unit 24 is provided with an upper body portion 21a and a lower body portion 22a before the waste assembled panel 80 seated on the work table 10 is inserted in the direction of the separating means 20. [ The front end of the upper body portion 21a and the lower body portion 22a are inserted between the upper casing member 81 and the lower casing member 82 of the pulley assembly type panel 80. [

3, the pressure fixing means 30 includes a plurality of pressure cylinder bodies 31 installed at upper and lower portions of the work table 10 so as to be spaced apart from each other along the width direction of the pulley assembly type panel 80, A plurality of pressure cylinder arms 32 one end of which is vertically movably coupled to each pressurizing cylinder body 31; a support plate 33 coupled to the other end of the plurality of pressure cylinder arms 32; And a cushion pad 34 coupled to the cushion 33.

The pressure fixing means 30 presses the upper and lower surfaces of the waste assembled panel 80 before the waste assembled panel 80 is put in the direction of the separating means 20 so that the separating means 20 is seated on the work table 10 Assembled panel 80 to prevent the waste assembled panel 80 from being pushed in the inserting direction of the separating means 20 when inserted between the upper and lower outer casings 81,

The pressurizing and conveying means 40 is installed in front of the separating means 20 and presses one side of the outer surface of the waste assembly panel 80 and rotates the waste assembled panel 80 to be introduced into the separation means 20 And includes an upper pressing conveying means 41 and a lower pressing conveying means 42. [

The upper pressurizing conveying means 41 includes a plurality of upper pressurizing rollers which are installed at a predetermined interval in the direction in which the pulverized assembly panel 80 is inserted in the upper portion of the work table and whose outer circumferential surface is in contact with the upper portion of the pulverulent assembly panel 80, (Not shown) coupled to any one of the top pressing rollers 41a to provide a rotational force and a rotational force transmitted from the first rotational force providing member (not shown) to any one of the upper pressing rollers 41a And a first rotational force transmitting portion 41b connecting each of the upper pressing rollers 41a to transmit the upper pressing roller 41a to the remaining upper pressing roller 41a.

The lower pressing and conveying means 42 is coupled to any one of a plurality of lower pressing rollers 42a and a plurality of lower pressing rollers 42a provided on one side of the upper surface of the work table 10 corresponding to the plurality of upper pressing rollers (Not shown) for providing a rotational force and a rotational force transmitted to the lower pressing roller 42a from the second rotational force providing member (not shown) to the remaining lower pressing roller 42a And a second rotational force transmitting portion 42b connecting between the lower pressing rollers 42a.

It is preferable that the pressurizing and conveying means 40 is installed in such a manner that the upper pressurizing conveying means 41 can be vertically moved so as to accommodate all of the pressurized conveying means 40 even if the thickness of the pulmonary assembled panel 80 is varied.

The first and second rotational force transmitting portions 41b and 42b are rotatably supported by the first and second rotational force transmitting portions 41b and 42b, A chain member connecting between the upper pressure roller 41a and each lower pressure roller 42a may be used.

The guide conveying means 50 is provided behind the separating means 20 for conveying the upper casing member 81 and the lower casing member 82 separated from the heat insulating material 83 by the separating means 20 backward A pair of guide rollers 51 sequentially arranged on the rear side of the separating means 20 and a pair of guide rollers 51 arranged on the rear side of the separating means 20 for conveying the rotational force of the upper pressurizing roller 41a or the lower pressurizing roller 42a to the guide roller 51, And a third rotational force transmitting portion 52 connecting the guide roller 51 or the roller 41a or the lower pressing roller 42a with the guide roller 51 and the third rotational force transmitting portion 52, .

The pair of guide rollers 51 are separated from the upper casing member 81 and the lower casing member 82 by the separating means 20 by the upper casing member 81, And a desorption section 53 for desorbing from the lower casing member 82.

Here, the desorption section 53 is preferably formed of a cylindrical brush member corresponding to the guide roller 51.

The first face machining means 60 is provided behind the separating means 20 and the upper and lower casing members 81 and 82 are separated and the heat insulating material 83 conveyed to the rear of the separating means 20 is cut in the thickness direction 4, a heat insulating material 83 conveyed rearwardly, a pair of at least one first processing body 61 provided on both sides, and a heat insulating material 83 connected between the first processing body 61, And a first processing heat line 62 arranged in parallel with the upper and lower surfaces of the first processing line.

In the present embodiment, the first surface processing means 60 is shown as being provided with two pairs at the positions where the upper surface and the lower surface of the heat insulating material 83 are cut, but the present invention is not limited thereto. More or less may be provided depending on the thickness of the heat insulating material 83 to be produced.

The second face machining means 70 is provided behind the separating means 20 and the heat insulating material 83 separated from the upper and lower exterior materials 81 and 82 and discharged to the rear of the separating means 20 is cut As shown in Fig. 4, a pair of the second processing body 71 and the second processing body 71, which are disposed opposite to the upper and lower portions of the heat insulating material 83 conveyed rearward, And a second processing heat line 72 disposed perpendicularly to the upper and lower surfaces of the first and second processing lines 83 and 83.

In the present embodiment, the second surface machining means 70 is shown to be provided with two pairs at positions where both side surfaces of the heat insulating material 83 are cut, but the present invention is not limited thereto. The second surface machining means 70 may be manufactured More than the width of the heat insulating material 83 may be provided.

Hereinafter, the operation of the heat insulation material reproducing apparatus of the lung assembled panel according to the embodiment of the present invention will be described with reference to the drawings.

5A to 5C are operation diagrams sequentially showing the initial operation of the separating means before the waste assembled panel is inserted in the separating means direction.

The apparatus 1 for recycling a waste assembled panel according to an embodiment of the present invention may be configured such that the waste assembled panel 80 is inserted into the upper separating means 21 and the lower separating means 22 The upper and lower surfaces of the pulmonary assembled panel 80 are pressed and fixed using the pressurizing and fixing means 30.

At this time, the upper and lower intervals of the upper separating means 21 and the lower separating means 22 are set to be smaller than the thickness of the heat insulating material 83 of the waste assembled panel 80.

5B, the upper separating means 21 and the lower separating means 22 are advanced in the direction of the pulverized assembly panel 80 by using the forward and backward movement force providing portion 24, 21 and the lower separating means 22 are inserted between the upper casing member 81 and the lower casing member 82 of the pulley assembly type panel 80.

At this time, the upper and lower casing members 81 and 82 of the pulverized assembly panel 80 are moved to the positions where the ends of the upper casing member 81 and the lower casing member 82 contact the upper separating means 21 and the lower separating means 22, The separating means 22 is inserted.

5C, the upper separating means 21 and the lower separating means 22 are vertically moved by using the up-and-down moving force supplying means 23 to move the upper and lower casings 81, 82 from the heat insulating material 83 at an initial stage.

At this time, the upper separating means 21 and the lower separating means 22 are moved up and down to a position where the interval between the upper separating means 21 and the lower separating means 22 becomes equal to the thickness of the heat insulating material 83.

As described above, the recycling apparatus 1 for the waste-assembled panel according to the embodiment of the present invention includes the upper and lower casings 81, 82 located at the ends of the waste assembly panel 80 to be charged before the waste assembly panel 80 is inserted, 82 and the heat insulating material 83 are initially separated by using the upper separating means 21 and the lower separating means 22 so that the upper and lower separating means 21, The durability of the upper separating means 21 and the lower separating means 22 is improved.

FIG. 6 is a schematic view showing an operating state of a recycling apparatus for a waste assembly panel according to an embodiment of the present invention.

6, the upper and lower cover materials 81 and 82 and the heat insulating material 83 located at the ends of the pulmonary assembled panel 80 to be charged are separated from each other by the upper separation unit 21 and the lower separation unit 22, And the pressurizing and conveying means 40 is driven after releasing the pressurized state of the pulmonary assembled panel 80 by the pressure fixing means 30, the upper and lower outer casings 81 and 82 of the pulmonary assembled panel are separated from the upper separating means 21 and the lower separating means 22 to be conveyed backward through the guide conveying means 50 located behind the upper separating means 21 and the lower separating means 22 and discharged .

At this time, the pieces of heat insulating material remaining on one surface of the upper and lower casing materials 81 and 82 are removed from the upper and lower casing materials 81 and 82 by the tearing portion 53 of the guide conveying means 50.

The heat insulating material 83 from which the upper and lower outer casings 81 and 82 are separated is moved to the rear of the upper separating means 21 and the lower separating means 22 to form the first surface processing means 60 and the second surface processing means 70), and then discharged to the outside.

Although the present invention has been described in connection with the preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. It is, therefore, to be understood that the appended claims will include all such modifications and changes as fall within the true spirit of the invention.

1: Recycling device of waste assembled panel
10: work table 11: guide roller
20: separating means 21: upper separating means
21a: upper body part 21aa: first guide slope
21b: upper blade portion 22: lower separating means
22a: lower body portion 22aa: second guide slope
22b: lower blade portion 23: vertical moving force supplying portion
23a: first cylinder body 23b: first cylinder arm
24: forward and backward movement force providing unit 24a: second cylinder body
24b: second cylinder arm 30: pressure fixing means
31: pressure cylinder body 32: pressure cylinder arm
33: support plate 34: buffer pad
40: pressure transfer means 41: upper pressure transfer means
41a: Upper pressing roller 41b: First rotational force transmitting portion
42: Lower pressurizing conveying means 42a: Lower pressurizing roller
42b: second rotational force transmitting portion 50: guide conveying means
51: guide roller 52: third rotational force transmitting portion
53: desorption section 60: first surface processing means
61: first machining body 62: first machining heat line
70: second face machining means 71: second machining body
72: second working hot line 80: waste assembled panel
81: upper casing member 82: lower casing member
83: Insulation

Claims (8)

An apparatus for recycling a waste assembly panel for separating the upper and lower exterior materials of an assembled panel filled with a heat insulating material between upper and lower exterior materials and the upper and lower exterior materials from the heat insulating material to reproduce the heat insulating material,
A work table on which the lung assembled panel is seated;
A pair of separating means spaced apart from the work table at a predetermined distance in the vertical direction and separating the upper and lower outer sheaths of the pulley assembly type panel inserted from the work table in the outer direction of the heat insulating material;
And guiding and conveying means provided behind the respective separating means for conveying the upper and lower exterior materials separated in the outer direction of the heat insulating material backward,
The pair of separating means
Wherein the front end is disposed at a position corresponding to the boundary between the upper casing and the heat insulating material of the pulmonary assembled panel, A pair of body portions formed with a guide slope;
At least one blade portion extending from the tip of each of the body portions along the guide slope to one side of the bottom surface and protruding outwardly of the body portion and spaced apart along the width direction of the body portion;
A vertical movement force supplier coupled to one side of the pair of body parts and providing a vertical movement force to each of the body parts;
Further comprising a forward and rearward movement force providing unit coupled to rear ends of the pair of body parts and providing forward and backward movement forces to the pair of body parts,
Before the waste assembled panel is put in the direction of the pair of separating means,
Wherein the pair of separating means is configured such that the front end of each of the body portions is inserted between the upper casing and the lower casing of the pulley assembly type panel by the forward and backward movement force providing unit, Wherein the upper casing member and the lower casing member are moved in the upper and lower directions, respectively, for initial separation. The method according to claim 1,
Further comprising at least one pressurizing and conveying means provided in front of the separating means for conveying the waste assembled panel in the direction of the separating means as it presses and rotates one side of the outer surface of the waste assembled panel. Recycling apparatus for waste assembled panel. delete delete delete The method according to claim 1,
Further comprising pressure fixing means provided at upper and lower portions of the work table for pressing and fixing the upper and lower surfaces of the waste assembled panel. The method according to claim 1,
The guide-
Further comprising a desorption section for desorbing a piece of the heat insulating material remaining on one surface of the upper and lower outer casings separated by the pair of separating means in the outer direction of the heat insulating material from the upper and lower outer casings. The method according to claim 1,
At least one first surface machining means provided behind the pair of separating means for cutting the heat insulating material from which the upper and lower outer sheaths are separated in the thickness direction;
Further comprising at least one second surface machining means disposed behind the first surface machining means for cutting the heat insulating material from which the upper and lower outer sheaths are separated in the width direction.

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