KR970002020B1 - Apparatus for producing protective cover of a pipe - Google Patents

Abstract

After forming a initial plastic rock wool(8), this rock wool is applied in the resin plaster device(6) to be coated with the surface by a resin. The resin covered(14) is composed of a creamy white low viscosity solution in state of emulsion which is produced by water added in by 1-20 multiple. Then by hardening the resin(14) with heated molding device(7), the molded rock wool is melted, hardened with its outer face, so as to have a cylindrical protective cover shape. The mold device(7) is divided into the upper mold(17) and the lower mold(18), and folded and accordingly, the heat line(19) containing heating condition of around 250-350 degree C is embedded inside each mold(17,18). This product is completed by entirely being hardened even on its outer side, by the method of being fed into the drying passage.

Description

Equipment for manufacturing pipe protective cover for plumbing

1 is an explanatory diagram showing a rolling process of an initial rock surface according to a conventional manufacturing method.

2 is an explanatory diagram showing a molding process of the initial shaping rock according to the conventional manufacturing method.

3 is an explanatory diagram of a resin coating device according to the present invention.

4 is an explanatory view of the operation of the mold apparatus according to the present invention.

5 is a detailed explanatory view of FIG.

6 is a perspective view of a state of use of the mold apparatus according to the present invention.

7 is a cross-sectional view of the mold apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Early rock wool 2: Conveyor

3: cutter 4: roller

5: PIPE COVER SIZING PLATE

6: resin coating device 7: mold device

8: initial molding rock surface 9: coating roller

10: non-painting roller 11: guide roller

12: chain 13: motor

14: Resin 15: Resin Storage Tank

16: sponge or wire mesh 17: upper mold

18: lower mold 19: heating wire

20: pipe

The present invention relates to an apparatus for producing a pipe protective cover for piping that is used to insulate, insulate the piping.

In general, since water is circulated in the pipes for pipes, most of the heat and heat insulation is required, and it is common to use a protective cover on the outer surface of the pipe.

Looking at the manufacturing method of the conventional protective cover provided to meet these requirements are as follows.

First, a calcium silicate-based mineral is used as the main raw material, and a capillary liquid heated and melted by CUPOLA is dropped on a spinning spinner and sprayed with a thermosetting resin to prepare rock wool.

The rock wool thus prepared is bulk shaped as a felt (FELT) type, and is then molded into a cylindrical shape, and then a thermosetting resin is cured to produce a protective cover of a certain standard.

That is, as shown in FIGS. 1 and 2 of the drawings, the rolled initial rock surface 1 conveyed by the conveyor 2 is wound in a roll shape by the pipe 20 having a predetermined size to obtain an appropriate thickness, and a cutter ( 3) is lowered to cut the initial rock (1).

In this way, the initial rock surface 1 having a cylindrical shape is secondarily mounted on the roller 4 and rolled on the roller 4 by inserting a pipe cover sizing plate 5 to make a constant thickness. The low density part of the preformed rock surface 8 is trapped by the wool and the high density part is removed.

Initially formed rock wool (8) through this forming step is to cover the line drawing paper (仙花 紙) on the surface in order to prevent swelling due to sublime properties.

Initially formed rock wool (8) with line drawing paper is put into a drying furnace having an oil burning method and dried to completely cure the finished product by cutting one side in the longitudinal direction by a rotary saw. In simple terms:

Such a conventional method of manufacturing a protective cover has a number of problems as follows because most of the process is made by hand.

Firstly, the initial rock surface 1 having a cylindrical shape is rolled on the roller 4 by inserting a pipe cover sizing plate 5 to make a constant thickness. There is a drawback that the thickness of the finished product is difficult because of difficulty.

Secondly, carbonization phenomenon occurs frequently during the process of heating and drying the drawing paper to be coated in order to prevent swelling of the surface, thereby deteriorating the appearance of the product and causing deterioration of quality.

Third, the use of line drawing paper reduced workability and workability because the line paper had to be removed at the time of secondary processing (attaching of silver foil KRAFT paper, silver foil P.V.C YARN, etc.) or product construction.

The present invention is to eliminate a large number of defects derived from such a conventional manufacturing method, described in detail with reference to the accompanying drawings as follows.

Bulk FELT-shaped wool was formed into a cylindrical shape to form an initial molded rock surface 8, and then the resin was applied to the resin coating device 6 as shown in FIG. Apply.

As shown in FIG. 5, this resin coating device 6 is composed of a resin coating roller 9, a non-coating device 10, a guide roller 11, and the like.

The resin 14 to be applied here is an emulsion-based, milky, low-viscosity liquid prepared with 1 to 20 times the water of the acrylic ester copolymer. The dry coating is colorless and transparent when used for inorganic coating, and has excellent adhesive strength. But it has excellent properties such as durability, water resistance, chemical resistance, aging resistance and the like.

On the other hand, the resin 14 to be applied prevents the PLY phenomenon of the product after curing when the thermosetting resin sprayed during the manufacture of the rock wool is not evenly sprayed, thereby lowering the appearance quality of the product, and also the initial molded rock surface ( After 8) is applied by the resin coating device (6) and then molded by the mold device (7) to help the finished product has a certain thickness.

The resin coating device (6) is a roll coating method in which the coating roller (9) and the non-painting roller (10) of thickness are immersed in the resin storage tank (15), and the coating roller (9) has a density of 10 to 35 kg / cm3, A sponge 16 having a thickness of 5 to 35 mm was attached to facilitate application, which prevents the rock surface from adhering to the application roller 9 when the resin 14 of the initial molded rock surface 8 is applied.

This principle has the advantage that the resin 14 is well coated because the micropores are present in the sponge 16 itself, and the non-departed portion, the bent portion is well applied.

In addition, a wire mesh may be used instead of the sponge 16, which is preferably about 10 to 25 necks per inch (INCH), which also prevents rock wool from adhering to the coating roller 9. Here, the guide roller 11 adjusts the coating amount of the resin 14 when the resin 14 of the initial forming rock surface 18 is coated, and the coating amount has 30 to 50 g / m 2.

In the next step, the resin 14 is cured by the heated mold apparatus 7, and the initial molded rock surface 8 to which the resin 14 is applied is melt-hardened by heat to have a cylindrical protective cover shape. The mold 7 apparatus is divided into upper mold 17 and lower mold 18 as shown in FIGS. 6 and 7, and each mold 17 and 18 has a temperature of about 250 to 350 ° C. The heating wire 19 having heating conditions is built in.

At this time, when the heating temperature of the heating wire 19 is low, since the moisture existing in the inside of the protective cover to which the resin 14 is applied is not completely evaporated, a wool (WOOL) sticks to the mold, It contaminates the inner surface and decreases workability for its removal.

On the other hand, the outer surface is first hardened by the mold apparatus 7 and the protective cover having a form is put into a drying furnace to be completely cured to the inside, and thus the finished product is shown.

EXAMPLE

The result of comparing the embodiment according to the manufacturing method of the present invention with the manufacturing method of the present invention, the inner diameter is 1 1/2 inch, the thickness is 30mm, the embodiment according to the conventional manufacturing method is as follows.

Note: For 1 1/2 inch inner diameter, 49mm, inner diameter + 3 / -1mm and thickness + 3 / -2mm represent KSF4701 tolerance.

As shown in the embodiment of the conventional manufacturing method, the deviation range with respect to the inner diameter is -1 to +3 and the manufacturing method of the present invention is 0 to +1.

Deviation range for the thickness was +2 ~ +4 in the conventional manufacturing method and 0 ~ +2 in the manufacturing method of the present invention.

As described above, the present invention provides a uniform color to the product by applying a resin to the initial molded rock surface, improves the appearance quality of the product, reduces the appearance damage due to friction with the product after packaging, and reduces the stinginess during construction. It is possible to improve the work efficiency, as well as to have a great effect, such as to be able to manufacture a product of a certain thickness.

Claims (4)

In the case where the bulk felt wool was molded into a cylindrical initial molded rock surface 8 using a roller 4, the resin 14, which was an emulsion solution, was formed on the surface using a resin coating device 6. Apparatus for manufacturing a pipe protective cover for piping, which is coated and heated and cured by a mold apparatus (7) having a heating wire (19). The method of claim 1, the resin coating device (6) is to accommodate the resin 14 in the resin storage tank (15) to install a coating roller (9), non-painting roller (10) and guide roller (11) therein. , The manufacturing apparatus of the pipe protection cover for piping to connect them to the motor 13 and the chain (12). 3. The apparatus for manufacturing a protective cover for piping according to claim 2, wherein a sponge or a wire mesh (16) is coated on the surface of the application roller (9). The apparatus of claim 1, wherein the mold apparatus (7) is divided into an upper mold (17) and a lower mold (18), and a heating wire (19) is provided therein, respectively.