JPS61144223A - Manufacture of composite curved shape - Google Patents

Abstract

PURPOSE:To form well a composite curved shape with less residual stress by putting a thermoplastic resin in a hollow part between a main body and a dummy member connected to the body and filling the hollow part with the expanded resin by hot bending before separating the dummy member or removing the dummy member after filling the hollow part with the resin expanded by heating before hot bending. CONSTITUTION:A thermoplastic resin 17 is put in a hollow part 16 formed by connecting 15c a dummy member 15b to a main body part 15a to bend the connected body 15 as well as to fill the hollow part 16 with the resin 17 expanded by hot bending and the dummy member 15b is removed thereafter by cutting the connected part 15c with the aid of a cutter. Or, the resin 33 is put in a hollow part 36 formed by fitting a dummy member 35b to a main body 35a to fill the part 36 with the resin 33 expanded by heating, and the main body 35a is hot bent together with the resin 33 after removing the member 35b. Then, a composite curved shape with less residual stress is formed into an excellent shape.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a composite curved member that is used to manufacture a composite curved member provided with a heat insulating material along its longitudinal direction. be.

(Prior Art) Conventionally, composite shapes are known in which a heat insulating material is provided along the longitudinal direction of the metal material in order to prevent dew condensation from occurring on the surface of the metal material. If this composite shaped material is bent at room temperature, it is difficult to bend and form it, and if it is forced to be bent, a large amount of residual strain remains, resulting in a decrease in durability.

Therefore, when trying to obtain a composite curved shape without causing such problems, for example, as shown in FIG. A hollow part 3 is formed with a curved part 2 for forming a heat insulating part, which is curved with the same curvature as the part 1, and a heat insulating material such as urethane resin is injected into the hollow part 3, foamed, and then solidified.
Then, as shown in FIG.
By removing , a composite curved shape member 5 having a heat insulating material 4 provided along the longitudinal direction of the curved shape member 1 was manufactured.

In addition, as another manufacturing method, there was a method in which a curved shape material bent with a predetermined curvature and a heat insulating material molded with the same curvature as the curved shape material were combined by fitting etc. In the conventional manufacturing method, the first
In the method shown in FIG. 1 and FIG. 12, the curvature accuracy between the curved profile 1 and the curved profile 2 for forming the heat insulation part is extremely high in order to prevent leakage of the heat insulator 4 when the heat insulator 4 is foamed. In addition, in order to hold the cocoon shapes 1 and 2 in a curved state so that the curved shape 1 and the curved shape 2 for insulation shell molding can be held against the foaming pressure of the heat insulating material 4. This method requires several jigs, which poses a problem of high cost.

Furthermore, the method of bonding a curved shape member and a curved heat insulating material has a problem in that the bonding force between the shape material and the heat insulating material is poor.

(Purpose of the Invention) This invention was made to solve the conventional problems as described above, and it is easy to bend when manufacturing curved sections, and there is almost no residual stress after bending. The object of the present invention is to provide a manufacturing method capable of obtaining a composite curved shape having excellent durability, heat insulation, and dew resistance.

(Structure of the Invention) The method for manufacturing a composite curved section according to the first invention of the present invention includes:
A thermoplastic resin is filled into the hollow portion formed by the main body part and the dummy part of the shape member consisting of the main body part and the dummy part, and then warm bending is performed, after which the dummy part is separated and the A method for manufacturing a composite curved member according to a second invention of the present invention is characterized in that a heat insulating material made of a thermoplastic resin is exposed, and also achieves the same object as the first invention. A thermoplastic resin is filled into the hollow portion formed by the main body portion and the dummy portion of the shape member, and then the dummy portion is separated to expose the heat insulating material made of the thermoplastic resin. , the shape material portion and the heat insulating material portion are subjected to warm bending.

In the method for manufacturing a composite curved section according to an embodiment of the first invention, first, an aluminum section having a main body portion and a dummy section is integrally extruded. In order to accurately and easily separate the dummy portion from the dummy portion, the separation boundary portion may be formed into a thin portion.

Next, the hollow portion formed between the main body portion and the dummy portion of the integrally extruded aluminum section is filled with a thermoplastic resin, and examples of the thermoplastic resin include vinyl chloride, polyethylene, polypropylene, polystyrene, and ethylene. Hinyl acetate copolymers and the like are used. and,
When filling the thermoplastic resin, for example, an unfoamed or incompletely foamed thermoplastic resin that is previously formed smaller than the hollow portion is charged into the hollow portion, and then the thermoplastic resin is filled with the thermoplastic resin by a method such as heating. Foam the resin,
The hollow portion is filled with thermoplastic resin.

Next, the shaped material is bent to a predetermined curvature by a warm bending process in which the material is heated to, for example, about 50 to 150°C. In this case, the means for warm bending is not particularly limited, but for example, a stretch wrap former, press, draw, roll, etc. may be employed.

Thereafter, the dummy portion of the warm-bending shape is separated to expose the heat insulating material made of the thermoplastic resin, thereby obtaining a composite curved shape having a heat insulating material provided along the longitudinal direction. . Note that the means for separating the dummy portion is not particularly limited, and for example, a milling cutter, a cutter, or the like may be employed.

On the other hand, in the method for manufacturing a composite curved section according to an embodiment of the second aspect of the present invention, first, the main body part and the dummy part are extruded separately, and then the main part and the dummy part are brought into contact with each other. A hollow portion is formed between the two when they are brought together.

Next, the hollow portion is filled with a thermoplastic resin, and the thermoplastic resin used is as exemplified above. Also in this case, an unfoamed or incompletely foamed thermoplastic resin formed smaller than the hollow part is charged into the hollow part, and then foamed by a method such as heating, so that the hollow part is made of thermoplastic resin. It is possible to adopt a means of filling the area with

Next, the main body part and the dummy part are released from each other, the dummy part is separated, the heat insulating material made of thermoplastic resin is exposed, and then the shape part and the heat insulating material part are heated to about 50 to 150 degrees Celsius, for example. The main body portion, together with the heat insulating material portion, is bent to a predetermined curvature by a warm bending process performed by heating. In this case, the means for warm bending may be those exemplified above.

(Example 1) FIGS. 1 to 5 are diagrams showing an example of the present invention, and an example of manufacturing a composite curved member 11 as shown in FIG. 1 will be described. This composite curved shape member 11 has a structure in which a heat insulating material 13 is provided along the longitudinal direction of a main body portion 15a made of an aluminum shape member.

When manufacturing such a composite curved member 11, first, a main body portion 15a and a dummy portion 1 as shown in FIG.
For example, the aluminum profile 15 having the
Extrusion molded in one piece using A6063S as a material. In this case, later the main body portion 15a and the dummy portion 15b
The separation boundary portion 15c may be formed into a thin portion so that the separation between the two is accurate and easy.

Next, as shown in FIG. 3, a hollow portion previously formed smaller than the hollow portion 16 is inserted into the hollow portion 16 formed between the main body portion 15a and the dummy portion 15b of the integrally extruded shaped member 15. A rod-shaped thermoplastic resin 17 that is foamed or partially foamed is charged. As this rod-shaped thermoplastic resin 17, vinyl chloride was used as an example, but
In addition, a liquid thermoplastic resin such as plastisol may be poured.

Subsequently, the thermoplastic resin 17 is placed in the hollow portion 16 as described above.
After charging, the thermoplastic resin 1.7 is foamed by heating, and as shown in FIG. 4, the hollow portion 16 is filled with a heat insulating material 13 made of the thermoplastic resin.

Next, the shaped material 15 is warmly bent together with the heat insulating material 13 to a predetermined curvature, preferably by heating to about 80 to 120° C., for example, by warm roll forming.
Shape shown in the figure.

Thereafter, the dummy portion 15b of the bent section 15 shown in FIG. 5 is cut and separated at the separation boundary portion 15c using, for example, a cutter to expose the heat insulating material 13 made of the thermoplastic resin foam, as shown in FIG. As shown in FIG. 2, a composite curved shape member 11 is obtained in which a heat insulating material 13 is provided along the longitudinal direction.

Therefore, in the manufacturing method shown in Example 1 above, the shape 1
Since the unfoamed or incompletely foamed thermoplastic resin 17 is charged when the thermoplastic resin 5 is in a straight state, the charging operation is very easy, and there is no leakage of the heat insulating material 13 when foaming is performed after charging. It is easy to adjust the pressure, there is no need for a fixing jig to counter the foaming pressure as in the past, and the work of filling the heat insulating material 13 using the thermoplastic resin 17 is significantly easier than with conventional manufacturing methods. become.

Furthermore, since the thermoplastic resin 17 is used as the material for the heat insulating material 13 and subjected to warm bending, the bending process is significantly easier than in conventional manufacturing methods. Since the process involves plastic processing, internal residual stress is extremely reduced compared to conventional methods, and durability is significantly improved.In addition, the internal resin functions as a core material, so there is no deformation of the main body part during bending. This has the advantage that it does not occur.

(Example 2) Figures 6 and 7 show another example of the present invention, in which the aluminum extruded shape 2 used here
5, as shown in FIG. 6, consists of two symmetrical main body parts 25a, 25a and a roughly H-shaped dummy part 25b connecting these parts.
5a and the dummy portion 25b are the separation boundary portions 25 at four locations.
They are integrated via c.

Then, after manufacturing the integrally extruded shape member 25 having the shape shown in FIG. An unfoamed or incompletely foamed thermoplastic resin that has been previously molded to be smaller than the hollow portion 26.26 is charged into the chamber, and then the thermoplastic resin is foamed to fill the hollow portion 26.26, and then After performing warm bending in a heated state, the separation boundary portion 2 of the section 25 is
By cutting and separating the dummy portion 25b at 5c, the seventh
As shown in the figure, two composite curved members 21.21 having a structure in which the heat insulating material 23 made of thermoplastic resin is exposed and the heat insulating material 23 is provided along the longitudinal direction of the main body portion 25a are obtained at the same time.

(Embodiment 3) FIGS. 8 to 10 show still another embodiment of the present invention, in which a main body portion 35a and a dummy portion 35b made of an aluminum profile are separately extruded, and then the dummy By locking the engaging hooks 35c, 35c provided on the portion 35b to the upper and lower side walls of the main body portion 35a, the main body portion 35a and the dummy portion 35b are integrated, and a hollow portion 36 is formed between them. do. Then, as shown in FIG. 8, the hollow portion 36 is filled with a heat insulating material 33 made of thermoplastic resin, and then, as shown in FIG. 9, the dummy portion 35b is separated from the main body portion 35a. Then, the heat insulating material 33 is exposed.

Subsequently, the main body portion 35a and the heat insulating material 33 are heated to preferably about 80 to 120° C. and processed, for example, by warm roll forming, the main body portion 35a and the heat insulating material 33 are warm bent at a predetermined curvature. As shown in FIG. 10, a composite curved shape member 31 having a structure in which a heat insulating material 33 is provided along the longitudinal direction of the main body portion 35a made of an aluminum shape member is obtained.

Even with such a manufacturing method, it is possible to charge the heat insulating material 33 made of thermoplastic resin in an unfoamed or incompletely foamed state, and in this way, the formation of the insulating material 33 is extremely easy. become. In addition, a heat insulating material 3 is attached to the main body portion 35a.
3, the warm bending process is performed with the bending process in place, which makes the bending process extremely easy, and the thermoplastic resin undergoes plastic processing. In addition, since the dummy portion 35b is separated before bending, it is economical in that it can be used repeatedly, and there is no need for separation using cutter sugar as in the first invention. , there is an advantage that there is no cutting end in the main body portion 35a, and a composite curved section having a good appearance can be obtained.

(Effects of the Invention) As explained above, according to the method for manufacturing a composite curved shape member according to the present invention, in the first invention, the main body portion and the dummy portion of the shape member consisting of the main body portion and the dummy portion are The formed hollow portion is filled with a thermoplastic resin, and then warm bending is performed, and then the dummy portion of the shape is separated to expose the heat insulating material made of the thermoplastic resin, and the second invention A thermoplastic resin is filled into a hollow portion formed by the main body part and the dummy part of the shape member made of the main body part and the dummy part, and then the dummy part is separated to form a heat insulating material made of the thermoplastic resin. Since the shape part and the heat insulating material part are subjected to warm bending after the body part and the dummy part are exposed, it is possible to significantly improve the manufacturability of the composite curved part. Since the hollow space formed by the process is filled with the insulation material in a straight or nearly straight state, filling of the insulation material can be carried out well, and there is no residual stress in the main body part and the insulation material after bending. This brings about the remarkable effect of being able to obtain a composite curved shape with extremely excellent durability, heat insulation, and dew-proofing properties, with almost no residue remaining.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a slope of a composite curved section manufactured according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a slope of an extruded section used in manufacturing the composite curved section of FIG. 1, Fig. 3 is an explanatory view of the slope showing the state 4 in which the thermoplastic resin is charged into the hollow part of the extrusion molded shape shown in Fig. 2, and Fig. 4 shows the state after foaming the thermoplastic resin shown in Fig. 3. FIG. 5 is an explanatory diagram of the slope shown in the state after warm bending the shape shown in FIG. 4, and FIG. FIG. 7 is an explanatory diagram of a slope of a composite curved section according to another embodiment of the present invention manufactured using the extruded section shown in FIG. 6, and FIG. 8 is a diagram showing a further embodiment of the present invention. In the example, a slope explanatory diagram showing a state in which a heat insulating material is filled in a hollow part formed by a main body part and a dummy part, FIG. Fig. 1O is an explanatory view of the slope of a composite curved member according to another embodiment of the present invention manufactured by warm bending the main body portion and the heat insulating material portion of Fig. 9, and Fig. 11 is a diagram illustrating the production of a conventional composite curved member. Fig. 12 is an explanatory view of the slope of the assembly of the curved material used for the heat insulation part and the curved material for forming the heat insulation part.
FIG. 2 is an explanatory diagram of a slope showing the procedure for manufacturing a composite curved section using the section shown in FIG. 1; ? 1,21.31...Composite curved shape material. 13.23.33...Insulating material, 15.25...Extruded shaped material, 15a, 25a, 35a...Body portion, 15b, 25
b, 35b...Dummy part, 16.26.36...
Hollow part. Patent applicant: Sankyo Aluminum Industry Co., Ltd. Patent attorney Yutaka Oshio, Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 11, Figure 12, Procedural Amendment 1 , Indication of the case Patent Application No. 268131 filed in 1982 2 Name of the invention Method for manufacturing composite curved sections 3 Person making the amendment Relationship to the case Name of patent applicant Sankyo Aluminum Industry Co., Ltd. 4 Agent Person Address (Residence) Kobikikan Ginza Building, 2-8-9 Ginza, Chuo-ku, Tokyo 104 Phone: 03 (567) 27fl 1 (
Representative) Heavy 03 (5E17) No. 7933 CG I [[)
6. Number of inventions increased by amendment 7. Patent applicant column of application subject to amendment;
(As shown in the Detailed Description of the Invention column of the specification, Figure 1 of the drawings, Figure 8, contents of amendment, 2. Amend "15a profile" in Figure 1 of the drawings to "15a body part" as shown in the attached sheet. Figure 1 (corrected drawing) by Yutaka Oshio, Patent Attorney.

Claims (2)

[Claims] (1) Fill the hollow part formed by the main body part and the dummy part of the shape material, which consists of the main body part and the dummy part, with a thermoplastic resin, then perform warm bending, and then 1. A method for manufacturing a composite curved member, comprising separating a dummy portion to expose a heat insulating material made of the thermoplastic resin. (2) A thermoplastic resin is filled into the hollow part formed by the main body part and the dummy part of the shape member made of the main body part and the dummy part, and then the dummy part is separated and the heat insulation made of the thermoplastic resin is filled. 1. A method for manufacturing a composite curved shape material, which comprises exposing the material and then subjecting the shape portion and the heat insulating material portion to a warm bending process.