JP2957820B2 - Insulation duct manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a cylindrical heat-insulating duct used as a heat insulating pipe for air conditioning or the like or as a pipe itself.

[0002]

2. Description of the Related Art A general method of manufacturing an air transport pipe for cooling, heating and air conditioning or a heat insulating duct as a heat retaining member of the air transport pipe is to blow a thermosetting resin onto glass fiber, form the strip into a belt shape, and form the strip into a predetermined size. It was cut, and the cut glass fiber mat was wound around a mandrel and formed into a cylindrical shape or the like. However, with such a method, it is not possible to continuously and efficiently manufacture the heat insulating duct. Therefore, the present applicant disclosed in Japanese Patent Application Laid-Open Nos. 59-87130 and 61-202828 that a strip-like sheet such as metal or paper was spirally wound around a mandrel to form a slide tube. A method and apparatus for forming a cylindrical body by spirally winding a belt-shaped glass wool mat impregnated with a thermosetting resin to form a cylindrical body and then heating the cylindrical body are proposed.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No.
According to the method disclosed in JP-A-87130 or JP-A-61-202828, the production of the heat insulating duct is greatly simplified as compared with the conventional method. However, even the above-mentioned method cannot automate until the last manufacturing process of the heat insulating duct.

In other words, a skin material is adhered to the outer surface of a pneumatic transport pipe for cooling, heating and air conditioning or a heat insulating duct used as a heat retaining member of the pneumatic transport pipe in order to improve weather resistance, moisture resistance, airtightness and the like. Then, in order to attach this skin material, the skin material is cut in accordance with the cut heat insulating duct, and the cut skin material is manually attached to the surface of the cylindrical body made of glass wool mat, so that the continuous process and It is very inefficient because it cannot be done, and it is necessary to prepare a skin material according to the dimensions of various cylindrical bodies,
It is disadvantageous in terms of space and cost.

[0005]

According to the present invention, there is provided an apparatus for manufacturing an insulated duct according to the present invention.
With respect to the supported mandrel and the axis of this mandrel
Spying a strip-shaped sheet supplied diagonally on the mandrel surface
It is wound in a ral shape to form a slide tube and this slide tube
And rotate it toward the tip of the mandrel.
Transfer mechanism, and the sliding mechanism downstream of the transfer mechanism.
Strip-shaped glass woolmer with thermosetting resin impregnated on tube surface
Heating the cylindrical body formed by spirally winding the
Temperature of the heating furnace and the cylinder coming out of the heating furnace
A temperature control device arranged near the outlet of the heating furnace to
Heat-cured downstream of this temperature control device
A belt for supplying a belt-like skin material obliquely to the axis of the cylindrical body
A supply device for the skin-like material and a downstream side of the supply device.
Cutting device, and the temperature control device further comprises a cylindrical body.
A large number of air jets are applied to a gate-shaped pipe
The hole was formed.

[0006] Further , the belt-like skin material supply device is bonded to the supply device.
It is possible to add a device for applying the agent. This adhesive
Is a tank filled with adhesive and a part of this tank
Drum to be immersed
Transfer roller that comes into contact with the inner surface of the skin material from below
Are preferred.

[0007] Thus, providing a temperature control device
To lower the surface temperature of the cylinder and apply it to the inner surface of the skin material
It is possible to make the adhesive function. That is, the cylinder
If the surface temperature of the body remains high, the adhesive will run down
There is a possibility that it will happen.

[0008]

[Function] By feeding a belt-like sheet obliquely to the axis of the mandrel, a sliding tube wound spirally around the axis of the mandrel is formed, and then a belt-like glass wool mat impregnated with a thermosetting resin is rotated. Forming a spirally wound cylindrical body which is supplied obliquely to the axis of the slide tube, and thereafter, the cylindrical body is heated to cure the thermosetting resin; Is supplied obliquely to the axis of the cylindrical body and wound spirally around the surface of the cylindrical body.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is an overall view of an apparatus for manufacturing a heat insulating duct by winding one strip-shaped skin material on the surface of a glass wool mat cylinder, and FIG. 2 shows a temperature control apparatus forming a part of the manufacturing apparatus. FIG. 3 and FIG. 3 are views showing a supply device of a belt-shaped skin material which forms a part of the manufacturing apparatus.

In the apparatus for manufacturing a heat insulating duct, a base end of a mandrel 2 is fixed to a support 1 disposed at an end on the upstream side (left side in FIG. 1). The mandrel 2 has a free end at the distal end, a hollow inside, a non-porous area in the area of 40 to 60% from the base end, and pores in the remaining area.
The heated air (200 to 300 ° C.) supplied into the inside is blown out from the pores.

At a position slightly upstream from the base end of the mandrel 2, the belt-shaped sheet 3 is supplied obliquely with respect to the axis of the mandrel 2. The band-shaped sheet 3 is made of cardboard or kraft paper, and in this embodiment, a first band-shaped sheet 3a on which the band-shaped sheet 3 is directly wound around the surface of the mandrel 2, and a part of the first band-shaped sheet 3a is formed on the outer surface. It is composed of a second belt-like sheet 3b that is wound around one another. Then, a release agent is applied to the inner surface of the first band-shaped sheet 3a in contact with the surface of the mandrel 2, and the second band-shaped sheet 3b to be superimposed on the outer surface of the first band-shaped sheet 3a
A vinyl acetate-based adhesive is applied to the inner surface.

A transfer mechanism 4 is arranged downstream of the supply section of the belt-shaped sheet 3. The transfer mechanism 4 obliquely crosses the belt 6 stretched between the pair of pulleys 5 and 5 around the outer periphery of the mandrel 2 (the belt-shaped sheet 3), and rotates the pulley 5 to cause the belt 6 to run, whereby the mandrel is moved. The belt-like sheet 3 is spirally wound around the two surfaces to form a slide tube 7, and the formed slide tube 7 is slid in the tip direction along the axis of the mandrel 2 while rotating. here,
Since the release agent is applied to the inner surface of the first band-shaped sheet 3a constituting the band-shaped sheet 3, the slide tube 7 can easily move along the mandrel 2, and the inner surface of the second band-shaped sheet 3b. Is coated with an adhesive, so that the slide tube 7 does not fall apart on the way.

Further, on the downstream side of the transfer mechanism 4,
The strip-shaped glass wool mat 8 impregnated with a thermosetting resin is supplied obliquely with respect to the axis of the sliding tube 7 (the axis of the mandrel 2). The strip-shaped glass wool mat 8 is supplied via a heated pressing roller or the like, and is wound in a spiral shape like the strip-shaped sheet 3 to form a cylindrical body 9 because the sliding tube 7 is rotating.

A heating furnace 10 is disposed downstream of the supply section of the glass wool mat 8. The cylindrical body 9 penetrates into the heating furnace 10, and the tip end of the mandrel 2 is inserted into the heating furnace 10, and further, inside the heating furnace 10, the band-shaped glass wool mat 8 constituting the cylindrical body 9 is formed. A diaphragm member for controlling the thickness may be provided. Then, the thermosetting resin in the cylindrical body 9 is cured in the heating furnace 10, and the shape of the cylindrical body 9 is maintained.

A temperature control device 1 is provided near the outlet of the heating furnace 10.
1 is arranged. As shown in FIG. 2, this temperature control device 11 has a large number of air ejection holes 13 formed in a gate-shaped pipe 12 and blows air onto the surface of the cylindrical body 9 passing through the temperature control device 11 to reduce the temperature. In this case, the adhesive applied to the inner surface of the skin material, which will be described later, functions.

A supply device 14 for a belt-like skin material is provided downstream of the temperature control device 11. The supply device 14 supplies the belt-shaped skin material 15 obliquely to the axis of the cylindrical body 9 and winds it around the surface of the cylindrical body 9 in a spiral shape as shown in FIG.

Further, the supply device 14 for the belt-shaped skin material includes an application device 16 for applying an adhesive. This adhesive application device 16
As shown in FIG. 3, a part of a drum 18 is immersed in a tank 17 filled with an adhesive, and a transfer roller 19
And an adhesive is applied to the inner surface of the belt-shaped skin material 15 fed out by the guide rollers 20 via the transfer roller 19.

Here, as shown in FIG. 5, the band-shaped skin material 15 is formed on an aluminum foil 23 via a reinforcing layer 22 on the surface of a base material 21.
Is pasted. For example, the base material 21 is 50 g / m2 kraft paper, the reinforcing layer 22 is glass yarn, and the aluminum foil 23 is 2 g / m2.
The thickness is 5 μm.

Further, a cutting device 24 is arranged on the downstream side of the belt-like skin material supply device 14. As described above, the strip-shaped sheet 3 is spirally wound around the surface of the mandrel 2 to form the sliding tube 7, and the strip-shaped glass wool mat 8 is spirally wound around the surface of the sliding tube 7 to form the cylindrical body 9. After the tubular body 9 is cured by heating, the heat insulating duct is formed by winding the belt-shaped skin material 15 in a spiral shape. Then, the heat insulating duct is connected to the cutting device 24.
Then, the slide tube 7 is pulled out from one end into a band shape to obtain a product.

FIG. 6 is an overall view of an apparatus for manufacturing a heat insulating duct by winding two strip-shaped skin materials around the surface of a glass wool mat cylinder. In this apparatus, the same members as those shown in FIG. 1 are used. Are denoted by the same reference numerals and description thereof is omitted.

That is, in the manufacturing apparatus shown in FIG. 6, a supply device 31 for the first band-shaped skin material 30 and a supply device 33 for the second band-shaped skin material 32 are arranged along the moving direction of the cylinder 9. Then, as shown in FIG. 7 (a), the first belt-shaped skin material 30 is spirally wound around the surface of the cylindrical body 9 with a gap 34 at the boundary as shown in FIG. As shown in the figure, the narrow second belt-shaped skin material 32 is
To form a heat-insulating duct by wrapping it in a spiral so as to cover it. The gap 34 need not be provided.

[0022]

According to the present invention as described above,
Since a heat insulating duct was formed on the surface of the cylindrical body formed by winding the belt-shaped glass wool mat in a spiral shape, the belt-shaped skin material was subsequently spirally wound in the same direction on the surface of the cylindrical body. The process up to the complete product can be performed in a continuous process, and there is no need to cut the skin material to the length of the already cut glass wool cylinder as in the past, greatly simplifying the manufacturing process of the heat insulation duct Be transformed into

In particular, straddle the cylinder near the outlet of the heating furnace.
Many air outlets are drilled in the gate-shaped pipe
Installed temperature control device, and this temperature control device
By lowering the surface temperature of the cylinder, the inner surface of the skin material
It is possible to prevent the applied adhesive from flowing down.

[Brief description of the drawings]

FIG. 1 is an overall view of an apparatus for manufacturing a heat insulating duct by winding a single band-shaped skin material around the surface of a glass wool mat cylinder.

FIG. 2 is a diagram showing a temperature control device.

FIG. 3 is a diagram showing a supply device for a belt-shaped skin material.

FIG. 4 is a perspective view showing a state in which one band-shaped skin material is wound around the surface of a glass wool mat cylindrical body.

FIG. 5 is an enlarged sectional view of a skin material.

FIG. 6 is an overall view of an apparatus for manufacturing a heat insulating duct by winding two belt-like skin materials around the surface of a glass wool mat cylinder.

FIG. 7A is a perspective view showing a state in which a first belt-shaped skin material is wound around the surface of a glass wool mat cylinder;
(B) is a perspective view showing a state in which the second belt-shaped skin material is wound around the surface of the glass wool mat cylinder.

[Explanation of symbols]

2 ... mandrel, 3 ... strip-shaped sheet, 3a ... first strip-shaped sheet, 3b ... second strip-shaped sheet, 4 ... transfer mechanism, 7 ... slide tube, 8 ... strip-shaped glass wool mat, 9 ... cylinder, 10 ...
Heating furnace, 11: temperature adjusting device, 14, 31, 33: feeding device for belt-shaped skin material, 15: skin material, 24: cutting device, 3
0: first band-shaped skin material; 32: second band-shaped skin material.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-87130 (JP, A) JP-A-4-254143 (JP, A) JP-A-4-208431 (JP, A) 31251 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F24F 13/02

Claims (2)

(57) [Claims] 1. A mandrel having a cantilevered base end.
And a belt-like shape supplied diagonally to the axis of this mandrel
Wrap the sheet spirally around the mandrel surface and slide
At the same time as forming a tube, this slide tube is
A transfer mechanism that rotates and moves
A thermosetting resin is applied to the surface of the slide tube downstream of the feeding mechanism.
Spiral glass wool mat impregnated with fat
A heating furnace for heating the cylindrical body formed by winding;
Near the outlet of the heating furnace to adjust the temperature of the cylinder coming out of the furnace
A temperature control device located beside and below this temperature control device
With respect to the axis of the cylinder that has been heat-cured on the flow side
Supply device for belt-like skin material that supplies belt-like skin material obliquely
And a cutting device arranged downstream of the supply device.
Furthermore, the temperature control device is disposed so as to straddle the cylinder.
Many air outlets are drilled in a pipe that forms a gate
An apparatus for manufacturing a heat-insulated duct, comprising: 2. An apparatus for manufacturing a heat-insulated duct according to claim 1.
In the above, the supply device of the belt-shaped skin material may be an adhesive coating device.
This adhesive application device is filled with adhesive
A tank, a drum partially immersed in the tank, and a drum at the lower end
Contact with the inner surface of the belt-shaped skin material from below
A heat insulating duct having a transfer roller that performs
Manufacturing equipment.