JPH05111961A - Method and device for manufacturing coated heat-insulating tubular body with skin sheet - Google Patents

Abstract

PURPOSE:To provide the above manufacturing process by which manpower operation can be omitted as much as possible regarding a coated heat-insulating tubular body made of a foamed resin used as the heat-insulating member of a heating-medium supply tube and the tubular bodies can be produced continuously in a large quantity, and a device thereof. CONSTITUTION:When a cylindrical tube body 7 made of a foamed resin is delivered from a tubular-body supply reel 1 and a skin sheet 9 is delivered from a skin-sheet supply reel 2 under the state, in which the skin sheet 9 forms a fin-shaped section, the cylindrical tube body 7 is covered with the exception of the slit section of the tube body 7 under the state, in which the tube body 7 is faced oppositely to the pressure-sensitive adhesive coated surface of the skin sheet 9, when the tube body 7 is passed through a molding guide 4, and the pressure-sensitive adhesive coated surface is stuck on the outer circumferential surface of the cylindrical tube body 7. The cylindrical tube body 7, to which the skin sheet 9 is stuck, is passed through a molding belt 6 and an intermediate split mechanism 17, thus manufacturing a primary semi-finished product tube body 16, to which the fin-shaped section is formed, and a secondary semi-finished product pipe body 18. Accordingly, manpower operation can be omitted as much as possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a coated heat-insulating tubular body with a skin sheet, which is used as a heat retaining member for coating the outer peripheral portion of a heat-insulated pipe such as a heat medium feeding pipe for air conditioning. And its device.

[0002]

2. Description of the Related Art A coated heat insulating tubular body of this type has a skin sheet affixed to the outer peripheral surface of a slitting tubular body made of foamed resin and having slits formed in the pipe length direction. A fin portion having an unpeeled separator (separator remaining portion) is formed at one end of the. Therefore, since the pipe diameter of the slidable pipe body can be freely expanded and contracted, if the pipe diameter size of the pipe to be insulated is within a predetermined range, the pipes to be insulated of various sizes can be easily inserted into the pipe body. After that, if the remaining portion of the separator is peeled off and then laminated so as to cover the slit portion, the tubular body and the heat-insulated tube can be easily integrated.

Conventionally, the manufacturing method of this type of coated heat-insulating tubular body is generally carried out by a typical manual work, and specifically, as shown in FIG. 6, each is rotatable and parallel. Three
One (first to third) roll A, B, C is provided, and two (second and third) rolls B, C of them are arranged on a predetermined work surface while the remaining one is The (first) roll A is provided so as to be movable in the arrow p direction.

Then, after the first worker separates the first roll A in the direction of the arrow p, as shown in FIG. 7, a skin sheet cut into a predetermined sheet width and a predetermined sheet length. Prepare D. Next, a part (separation part Eb) other than a part (separator remaining part Ea) attached to a part of the separator E by the second worker, that is, a fin-shaped part Db at one end in the sheet width direction of the skin sheet D. Is peeled along the peeling slit S to expose the adhesive-coated portion Da corresponding to the peeled portion Eb. Then, the skin sheet D,
The sheet is placed so that the sheet end portion of the exposed adhesive-coated portion Da, which is the end portion on the opposite side of the fin-shaped portion Db, is located on the second roll B.

In such a state, the foamed resin cylindrical tube F cut into a predetermined length between the two rolls A and B is arranged so that the tube length direction is along the roll length direction of the rolls A and B. Place it.

Next, the first roll A which has been separated from the first roll A
Is again brought close to the second and third rolls B and C, and the roll surface of the roll A is brought into contact with the cylindrical tubular body F. Then, the second roll B is rotated. Thereby, the cylindrical tubular body F sandwiched between the rolls A, B, and C is rotated together,
The exposed adhesive application portion Da is attached to the outer surface of the tubular body F. When the entire application of the pressure-sensitive adhesive applied portion Da is completed, the first roll A is moved again in the direction of the arrow p as described above, and the second and third rolls B and C are covered with a heat insulating cover sheet, which is a covered heat insulation sheet. Take out the tubular body.

[0007]

However, according to the above-mentioned conventional methods, the core of the manufacturing process makes manual work dominant, and in order to improve productivity, at least two skilled workers must be used. Is required, and in addition to requiring rigorous physical labor, the length of the product is restricted by the length of the rolls A, B, C used, and at least the roll length of each roll A, B, C is It is impossible to manufacture products with a length exceeding this, which limits the flexibility of product specifications. Also,
There is a problem in work management, productivity improvement, quality control, etc., such as a skin sheet attached due to manual work that is easily wrinkled, and there is a problem in cost reduction.

It is an object of the present invention to provide a method and an apparatus for manufacturing a coated heat insulating tubular body with a skin sheet, which can be manufactured with high productivity by omitting manual labor as much as possible. ..

[0009]

In order to achieve the above object, the invention of claim 1 provides a skin sheet having a tubular body made of a foamed resin, which is extended in the pipe length direction, and at least one sheet surface of which is coated with an adhesive. In the longitudinal direction, the tubular body is made to face the pressure-sensitive adhesive application surface of the skin sheet so that the pipe length direction is along the sheet length direction, and both ends of the skin sheet in the sheet width direction substantially abut. In addition, the skin sheet is attached to the outer peripheral surface of the tubular body except for the fin-shaped portion that projects at a predetermined width at one end in the sheet width direction.

The invention of claim 2 or claim 3 is based on claim 1.
In the above invention, the foamed resin tubular body is a cylindrical tubular body or a slitting tubular body, respectively.

According to a fourth aspect of the present invention, in order to specifically carry out the method according to the first aspect of the present invention, a tubular body delivery means for delivering the foamed resin tubular body in the pipe length direction and at least one seat surface. A skin sheet feeding means for feeding out the skin sheet coated with the adhesive in the sheet length direction, a guide means for guiding the tubular body so as to face the pressure-sensitive adhesive coated surface of the skin sheet, and a guide means subsequent to the guiding means. The outer periphery of the tubular body is provided so that the pressure-sensitive adhesive-coated portion of the skin sheet substantially abuts both ends in the sheet width direction, and except for a predetermined width portion along one end in the sheet width direction. Curving and deforming means for curving the skin sheet so as to cover the surface,
It is characterized by having.

[0012]

When the tubular body made of foamed resin is fed out from the tubular body feeding means and the skin sheet is fed out from the skin sheet feeding means, the tubular body passes through the guiding means, and the tubular body adheres to the adhesive sheet. Then, when passing through the curving and deforming means, a portion other than the fin portion at one end in the sheet width direction of the skin sheet is attached to the outer peripheral surface of the tubular body.

In this case, when the tubular body is a cylindrical tubular body, a slit portion is formed along the vicinity of the root portion of the fin-shaped portion, that is, along the pipe length direction, after the skin sheet is attached to the outer peripheral surface. After that, a coated insulating tubular body is obtained. The drawn-out tubular body may be a tubular body in which a slit portion is already formed along the pipe length direction.

[0014]

1 shows an embodiment of a manufacturing apparatus according to the present invention, in which a tubular body supply reel 1 constituting a tubular body delivering means, a skin sheet supply reel 2 constituting a skin sheet delivering means, A stripping roll 3 forming a peeling means, a primary forming guide 4 forming a guiding means, a secondary forming guide 5 forming a curve deforming means, a forming belt 6 forming a take-off forming means, and an intermediate division forming a slit portion forming means. Mechanism 1
It is roughly composed of 7.

The supply reel 1 is equipped with a cylindrical tubular body 7 made of foamed resin (for example, foamed polyethylene having a foaming ratio of 5 to 40 times, an outermost diameter of 20 to 200 mm and a tube thickness of 5 to 30 mm). The cylindrical tube body 7 delivered from the supply reel 1 is introduced into the primary molding guide 4 via a guide conduit 8.

Here, the cylindrical tubular body 7 can be easily obtained by extruding a foamed polyethylene resin with an extruder. In addition, a conventionally known tubular molding device, that is, a sheet body made of the foamed polyethylene is fed out in the sheet length direction, but both ends of the sheet width direction are butted, and the butted ends are heat-sealed to each other. It can be easily molded even by using the apparatus configured as described above.

The supply reel 2 is provided with a skin sheet 9 made of, for example, polyvinyl chloride and having a thickness of 40 to 300 μm, and an adhesive is applied to one surface side of the skin sheet 9. In addition, a separator 12 is attached to the pressure-sensitive adhesive applied surface 9a, and further, one end portion of the separator 12 in the sheet width direction of the skin sheet 9 has a sheet length direction of the skin sheet 9, that is, A peeling slit (see symbol S in FIG. 7) is formed along the feeding direction.

The skin sheet 9 fed from the supply reel 2 is introduced into the primary molding guide 4 via relay rolls 10 and 11, while the separator peeled by the stripping roll 3 is introduced. 12 peeling section 12
b is mounted on the recovery reel 13.

Further, the secondary molding guide 5 is provided on the downstream side of the primary molding guide 4, and the molding belt 6 is provided on the downstream side of the secondary molding guide 5. The forming belt 6 is composed of running belts 6A and 6B having two upper and lower stages.
The upper running belt 6A has pulleys 6a, 6
The running belt 6B on the lower stage is wound around the pulley 6b.
It is wound around c and 6d.

FIG. 2 shows a more detailed structure in the vicinity of the primary molding guide 4 and the secondary molding guide 5, and in order to facilitate further understanding, FIG. 3 shows the vicinity of the primary molding guide 4. It is shown enlarged.

The primary molding guide 4 has a trumpet tubular shape as a whole, and is expanded in a hem-splitting manner from the midway portion toward the upstream end, while the range from the midway portion to the downstream end is The guide hole 5a has a circular cross section, and a slit hole 4b is formed substantially in the center of the upper surface of the guide hole 5a. The hem crack expanding portion 5c constitutes a guide means, and the guide hole portion 5a constitutes a curve deforming means.

A guide hole 5a having a semicircular cross section is formed in the secondary molding guide 5, and the radius of the guide hole 5a is reduced from the upstream side to the downstream side.
The curved surface of is facing downward.

The upper molding belt 6A and the lower molding belt 6B are respectively formed with molding holes 6Aa and 6Ba having a semicircular cross section so as to face each other.
A circular guide hole is formed by 6Ba.

A slit portion forming means is provided on the downstream side of the forming belt 6, and the dividing mechanism 17 as the slit portion forming means forms a slit portion on the primary semi-finished product 16 formed by the forming belt 6. It is constituted by a circular rotary blade 17a to form the. Further, a cutting means (not shown) for cutting the obtained secondary semi-finished product tubular body 18 into an appropriate pipe length is provided on the downstream side of the dividing mechanism 17.

Next, the operation of the present embodiment constructed as described above will be explained. The cylindrical tube body 7 fed from the supply reel 1 is inserted into the primary molding guide 4, and at this time, the skin sheet 9 fed from the supply reel 2 is inserted into the molding guide 4. The skin sheet 9 in the molding guide 4 has an adhesive coated surface 9a exposed corresponding to the peeling portion 12b of the separator 12,
A fin-shaped portion 9b is formed at one end of the.

Therefore, in the primary molding guide 4, the pressure sensitive adhesive application surface 9a corresponding to the peeling portion 12b is exposed, and the cylindrical tube body 7 faces the pressure sensitive adhesive application surface 9a, and the guide hole is formed. In the portion 4a, the adhesive coated surface 9a covers the outer peripheral surface of the cylindrical tube body 7 except for the slit portion 7a. When the skin sheet 9 passes through the primary molding guide 4, the fin-shaped portion 9b is formed in the slit hole 4b.
The skin sheet 9 runs with the inserted (see FIG. 4).

The cylindrical tubular body 7 has the primary molding guide 4
After passing through the molding belt 6, it travels toward the molding belt 6, but since it passes through the secondary molding guide 5, it easily enters the molding belt 6. At this time, since the cylindrical tube body 7 is inscribed in the guide hole 5a of the secondary molding guide 5 particularly near the fin-shaped portion 9b, the pressure-sensitive adhesive application surface 9a of the skin sheet 9 abuts in the sheet width direction. The areas near both ends are sufficiently attached.

Further, the cylindrical tubular body 7 fed into the molding belt 6 and having the skin sheet 9 attached thereto is the both belts 6
It passes between A and 6B, but at this time both belts 6A and 6B
B is molded between the molding holes 6Aa and 6Ba in a sandwiched state,
The adhesive coated surface 9a of the skin sheet 9 can be evenly attached to the outer peripheral surface of the cylindrical tubular body 7, and the primary semi-finished tubular body 1
6 is obtained.

In the primary semi-finished product 16 formed as described above, the slit portion 7a shown in FIG. 4 is formed by the circular rotary blade 17a of the dividing mechanism 17. The slit portion is formed by making a cut in the pipe radial direction along the root of the fin-shaped portion 9b with the fin-shaped portion 9b standing upright as shown in FIG.

The secondary semi-finished product tubular body 18 in which the slit portion 7a is formed is then cut into a predetermined tubular length by a cutting means to form a coated heat insulating tubular body as a final product. The production rate of the coated heat-insulating tubular body produced in this manner is, for example, 1 minute per minute.
Since it will be up to 30 m, it can contribute to the improvement of productivity, and there are great expectations for realization of full automation of the process.

FIG. 5 shows an example of the use of the coated heat insulating tubular body 19, in which the slit portion 7a is expanded and the heat insulation pipe 20 is inserted from the expanded portion, and the separator remaining portion 12a is then inserted.
Is peeled off, and the pressure-sensitive adhesive coated surface 9a of the fin-shaped portion 9b exposed by the peeling is laminated on the back surface of the skin sheet 9 facing it.

The polyvinyl chloride, which is the base material of the skin sheet 9, is excellent in heat resistance, weather resistance, workability and the like, and is particularly effective for the above-mentioned use example of the coated heat insulating tubular body 19.

In the present embodiment, the cylindrical tube body 7 is mounted on the supply reel 1. However, the slit portion forming step by the dividing mechanism 17 is preliminarily taken into consideration, and the slit portion in which the slit portion is already formed is formed. The split tube body may be mounted.

In the first and second embodiments, the skin sheet 9 to which the separator 12 is attached is used. However, a release agent is applied to the surface opposite to the adhesive application surface 9a. It is also possible to use a skin sheet having a structure in which the separator is omitted.

With this structure, the recovery roll 13 is
Can be omitted, and the entire apparatus can be simplified and the separator disposal process can be omitted.

[0036]

As described above, according to the invention of claim 1,
The foamed resin tubular body is paid out in the pipe length direction, the skin sheet in which the adhesive is applied to at least one of the sheet surfaces is paid out in the sheet length direction, and the tubular body has the pipe length direction on the adhesive application surface of the skin sheet. The sheets are opposed to each other along the sheet length direction so that both end portions in the sheet width direction of the skin sheet substantially abut, and except for a fin-shaped portion protruding at a predetermined width at one end portion in the sheet width direction. Since the skin sheet is attached to the outer peripheral surface of the tubular body, at least the human labor work of the part forming the core of the manufacturing process can be omitted as much as possible, in other words, skilled work. Therefore, labor saving can be realized without requiring personnel. Further, since the skin sheet can be continuously attached in the running state, the mass productivity is excellent. Furthermore, there is no restriction on the pipe length of the final product, and a uniform and high-quality product can be manufactured at high speed and at low cost.

According to the second aspect of the present invention, since the cylindrical tubular body is used as the foamed resin tubular body initially fed out, the supplied cylindrical tubular body is a relatively soft material. The roundness of the final product can be maintained even if it is composed of

According to the third aspect of the present invention, since the slitting tube body in which the slit portion is formed in the pipe length direction is used as the foamed resin tube body that is initially fed out, the slit portion formation afterwards is performed. There is a possibility that the process can be omitted.

Further, according to the invention of claim 4, a tubular body feeding means for feeding the tubular body made of the foamed resin in the pipe length direction, and a skin sheet having at least one sheet surface coated with an adhesive are provided in the sheet length direction. And a guide means for guiding the tubular body so as to face the pressure-sensitive adhesive application surface of the skin sheet, and an adhesive-coated portion of the skin sheet provided after the guide means. A curved deformation in which the skin sheet is curved so that both ends in the seat width direction substantially abut, and the outer peripheral surface of the tubular body is covered except for a predetermined width portion along one end in the seat width direction. Since it is characterized by including means, it suffices to add a simple configuration by diverting a known device from the related art, and the inventions of claims 1 to 3 can be easily and specifically described. Practicable equipment It can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a configuration of an embodiment of an apparatus used for carrying out a manufacturing method of the present invention.

FIG. 2 is a cross-sectional view showing details of the vicinity of the primary molding guide of FIG.

3 is a plan view taken along line XX in FIG. 1. FIG.

FIG. 4 is a sectional view taken along line ZZ in FIG.

FIG. 5 is a cross-sectional view showing an example of use of the coated heat insulating tubular body which is the product.

FIG. 6 is a side view showing a configuration of a conventional manufacturing apparatus.

FIG. 7 is a perspective view showing a peeled state of the skin sheet shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tubular body supply reel (tubular body delivery means), 2 skin sheet supply reel (skin sheet delivery means), 3 collection rolls (peeling means), 4 primary molding guide, 4c cuff crack expanding portion (guide means), 4a guide Holes (curved deformation means), 6 forming belts (pull-off forming means), 7 cylindrical tubes, 9 skin sheets, 9a adhesive coating surface, 9b fin-like parts, 16 primary semi-finished product tubes, 17 splitting mechanism (slits) Part forming means), 18 secondary semi-finished product tubular body, 19 coated heat-insulating tubular body 20, heat-insulated tube.

Claims (4)

[Claims] 1. A foamed resin tubular body is drawn out in a pipe length direction, and a skin sheet having an adhesive applied to at least one sheet surface is drawn out in a sheet length direction, and the tubular body is placed on the adhesive application surface of the skin sheet. The pipe-like direction in which the pipe length direction is opposed to the sheet length direction so that both ends of the skin sheet in the sheet width direction substantially abut with each other, and the fin shape protruding at a predetermined width at one end in the sheet width direction. The method for producing a coated heat-insulating tubular body with a skin sheet, the method comprising: sticking the skin sheet to the outer peripheral surface of the tubular body, except for the portion. 2. The foamed resin tubular body is a cylindrical tubular body, and after the skin sheet is attached, the vicinity of the root of the fin-shaped portion of the skin sheet is cut along the pipe length direction. The method for producing a coated heat insulating tubular body according to claim 1, wherein. 3. The method for producing a covered heat insulating tubular body with a skin sheet according to claim 1, wherein the foamed resin tubular body is a slidable tubular body in which a slit portion is formed in a pipe length direction. 4. A tubular body delivery means for delivering a foamed resin tubular body in a pipe length direction, and a skin sheet delivery means for delivering a skin sheet having an adhesive applied to at least one sheet surface in a sheet length direction. A guide means for guiding the tubular body so as to face the pressure-sensitive adhesive application surface of the skin sheet, and a guide means provided subsequent to the guide means, wherein the pressure-sensitive adhesive application portion of the skin sheet has substantially two ends in the sheet width direction. Bending and deforming means for bending the skin sheet so as to cover each other and to cover the outer peripheral surface of the tubular body except for a predetermined width portion along one end in the sheet width direction. An apparatus for producing a coated heat insulating tubular body with a skin sheet.