JPS6030255B2 - Manufacturing equipment for foamed synthetic resin thermal covers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a heat insulating cover made of synthetic resin foam and used to cover a tube body.

In the past, various devices have been proposed for manufacturing heat-insulating covers for insulating pipes that carry hot water, hot water, cooling water, etc., and these heat-insulating covers have a skin layer for aesthetic purposes, surface protection, etc. A device for continuously producing a heat-insulating cover having such a skin layer, which is preferably provided, is provided, for example, in Japanese Patent Publication No. 48-19705.

This device consists of an external mold having a hollow columnar shape as a whole with a notch extending in the axial direction at the top, and a columnar core mold having a fin-like plate disposed at the center of the external mold and extending outward through the notch. It is mainly composed of a molding mold made up of a mold, and a transfer means that moves in contact with both sides of a fin-like plate extending outward from the core mold. Two sheets are supplied as an outer layer material and an inner layer material to the above-mentioned mold, and a foaming resin liquid is injected between these sheets. The end portion of the sheet extending to the fin plate is held in a state in contact with both sides of the fin-like plate, and the foamable resin liquid is foamed and hardened in the mold while being transferred by the transfer means. This is done by continuously pulling from the mold. However, even when using such a device, it is difficult to uniformly and sufficiently fill the foam in the mold, the generation of "stains" is difficult to avoid, and it is difficult to obtain a foam with a uniform density in the length direction. It had the disadvantage of being difficult to deal with.

The present invention has been made for the purpose of providing a manufacturing apparatus for a heat insulating cover that eliminates the above-mentioned drawbacks. An apparatus for manufacturing a foamed synthetic resin heat insulation cover filled with synthetic resin foam and molded into a hollow column shape, the apparatus comprising a means for supplying an outer layer material and an inner layer material, and a means for supplying the outer layer material and the inner layer material. a resin liquid injecting means for injecting a foamed curable synthetic resin liquid into the intermediate layer, and a hollow columnar external mold having one notch cut out in the axial direction from one end to the pond end. a molding means comprising a columnar core mold disposed in the center of the external mold so as to reach both ends of the external mold and having a fin-like plate in the front half; The present invention relates to an apparatus for manufacturing a heat-insulating cover made of foamed synthetic resin, characterized by comprising a conveying means provided above the molding means so as to be located behind the provided fin-like plate.

The apparatus of the present invention will be explained below with reference to the drawings.
FIG. 1 is a sectional view showing an example of a thermal cover manufactured using the apparatus of the present invention, in which 11 is an outer layer material that covers the outside of the thermal cover, 12 is an inner layer material that covers the inner surface,
A synthetic resin foam 2 is filled between the outer layer material 11 and the inner layer material 12 to form a hollow cylindrical body.

Such a heat insulating cover is used as a heat insulating material for piping, and when in use, the heat insulating cover is split vertically into two, leaving the outer layer material (skin layer) intact, and inserted into the pipe to be heat insulated. The piping can be kept warm by the cover by attaching double-sided adhesive tape or the like to the sheet piece protruding from one end to give it adhesive properties, and then attaching this to the other end of the cover for sealing.

Next, FIG. 2 is a side view showing an example of the device of the present invention.
Reference numerals 1 and 32 are the base materials for the outer layer material 11 and the inner layer material 12, from which the outer layer material and the inner layer material 12 are supplied, and 33 is a supply roll for supplying these sheets. be.

Further, 34 is a sheet supply guide plate, and the guide plate 34
By being passed through, the outer layer material and the inner layer material are curved and folded downward, and are advanced with the inner layer material 12 disposed inside. This is illustrated in FIG. 3, which shows a cross-sectional view taken along line A--A in FIG. Next, 4 is an injection device for injecting a foamed curable synthetic resin liquid, and the resin liquid is injected into the outer layer material 11 and the inner layer material 1 through an injection nozzle 41.
2.

FIG. 4 is a cross-sectional view taken along the line B--B in FIG. 2, and shows a state in which the resin liquid 42 is supplied through the injection nozzle 41. Next, in FIG. 2, reference numeral 5 is made of external metal, and the mold is a hollow columnar type having one notch at the top thereof which is cut out in the axial direction and extends from one end to the other. Inside the external mold, a columnar core mold 6 is arranged at the center thereof so as to reach both ends of the external mold 5, and these external molds 5 and the columnar core mold 6 perform the molding means in the present invention. It is configured.

A fin-like plate 63 is provided in the front half of the columnar core mold 6 in parallel to its central axis, and this fin-like plate 6
It is preferable that the upper end of the fin plate 6 extends at least to a tangent line on the inner circumference of the outer mold 5.
3 may be provided so as to pass through the notch of the external mold 5 and protrude outward from the external mold 5. and 6
Reference numerals 1 and 62 are supporting scents for fixing the columnar core mold 6 to the stereotactic path. Further, 7 is a conveyance means, and what is illustrated is a transfer device consisting of a pair of caterpillars, which holds the ends of the outer material 11 and the inner material 12 protruding from the notch of the outer mold 5 between the caterpillars. It is arranged so that it is transferred in the direction of the arrow. In the present invention, the conveyance means 7 is provided above the molding means so as to be located behind the fin plate 63 provided on the columnar core mold 6 of the molding means.
FIG. 5 is a sectional view taken along line CC in FIG. 2,
As shown in this figure, it is preferable that the inner layer material 12 be pressed down by a guide leaf spring 64 and moved along the support 61.

Moreover, FIG. 6 is a cross-sectional view taken along the line D-D in FIG. The liquid foams and fills the space, and the outer layer material 11 is transferred to the outer mold 5 and the inner layer material 12 is transferred to the columnar core mold 6 while being in close contact with it.
The shape of the heat retaining cover is formed, and the foamed resin liquid 21 hardens while passing through the external mold 5 to produce the synthetic resin foam 2.

FIG. 7 is a cross-sectional view taken along line E-E in FIG. 2,
The conveying means 7 is held so as to hold the ends of the outer layer material 11 and the inner layer material 12 that protrude from the notch of the outer mold 5 and extend outward.
Caterpillars 71 are arranged, and the molded heat insulating cover is passed through the mold by driving the conveying means 7, and then the heat insulating cover is cut into a regular length.

In addition, the heat insulation cover is the outer layer material 11 at the time of passing through the mold.
It has a total of four end pieces, both ends of the outer layer material and both ends of the inner layer material, but if one end of the outer layer material is left and the other three pieces are cut, a heat insulating cover as shown in Fig. 1 can be obtained. In the apparatus of the present invention, a cutting means for this purpose can be provided at an appropriate location ahead of the molding means in the direction of travel. In addition, in the present invention, the notch of the external mold is initially made wide in the middle and gradually becomes narrower as it progresses in the direction of movement to avoid the formation of cavities due to gas accumulation and space accumulation. This is more preferable in that the foam fills every corner of the space formed by the material.

The apparatus for manufacturing a heat insulating cover of the present invention is as described above, and in particular, the fin plate of the columnar core mold of the molding means is provided only in the front half of the columnar core mold, and the conveying means is arranged behind it. Therefore, in the uncured stage as it progresses through the mold,
Since the outer layer material is not pulled by a tensioning machine, uniform filling of the foam is not inhibited by local stress, and even details can be filled with the foam.

In addition, in the conveying means, the ends of the outer layer material and the inner layer material are not held by intervening fin-like plates as in the conventional method.
Since only the ends of these outer and inner layer materials can be kept for a long time, uneven transfer speeds caused by friction between the ends and the fins, such as when pulling with fins interposed, can be avoided. This makes it possible to transfer the molding material extremely smoothly and in a stable manner without causing any problems. ．． Thus, according to the apparatus of the present invention, it is possible to uniformly fill the foam to the smallest detail without the generation of soot, and also to make the foam density uniform in all axial directions, thereby producing a heat insulating cover of excellent quality. It can be done.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a heat insulation cover manufactured using the device of the present invention, FIG. 2 is a side view showing an example of the device of the present invention, and FIGS. 3, 4, 5, Figures 6 and 7 are lines A-A, line B-B, and C-C in Figure 2, respectively.
FIG. 11...Outer layer material, 12...Inner layer material, 2
...Synthetic resin foam, 33...Sheet supply roll, 34...Sheet supply guide plate, 4
... Resin liquid injection device, 41 ... Injection nozzle, 42 ... Resin liquid, 5 ... External mold,
6... Column core type, 61, 62... Support, 63...
...Fin plate, 7...Transportation means, 71...
Catapira. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. An apparatus for manufacturing a foamed synthetic resin heat-insulating cover having an outer layer material and an inner layer material, and a synthetic resin foam is filled in the middle of these inner and outer layer materials and formed into a hollow column shape. is a shaft that communicates from one end to the other with a supply means for the outer layer material and the inner layer material, and a resin liquid injection means for injecting a foamed curable synthetic resin liquid into the intermediate layer composed of the outer layer material and the inner layer material. A hollow columnar external mold having one notch cut out in the direction, and a fin-like plate arranged in the center of the external mold so as to reach both ends of the external mold, and a fin-like plate provided in the front half. and a conveying means provided above the molding means so as to be located behind the fin-like plate provided on the columnar core mold of the molding means. Manufacturing equipment for foamed synthetic resin thermal covers.