DE102005012138A1 - A radiator surrounding thermally insulating sealing material - Google Patents

Abstract

This thermally insulating sealing material can prevent breakage due to freezing. Molded from a water-repellent urethane foam by casting molds. The ingress of water during a car wash or rainy weather is prevented.

Description

The The present invention relates to a thermally insulating Sealant provided around a radiator and is arranged, and that the floor portion of a cabin elastic contacted to prevent heat from an engine from getting around it to the front of the radiator to flow.

In an industrial vehicle such as a truck, the engine compartment is limited and there is little available space because the cab is located above the engine. As in 2 Accordingly, a structure is used in which a radiator is shown 101 in front of a motor 100 is arranged. While air from the outside through a cooling fan 102 is retracted on the front surface side of the engine 100 behind the radiator 101 is arranged, will heat with the radiator 101 exchanged, after which the air passes through the periphery of the engine 100 flows and then from an exit 104 which is in a lower cover 103 of the engine compartment is provided to the outside of the vehicle.

Initially, there is a problem that the air, which has been heated by flowing through the radiator and then further heated by the heat of the engine, along the front of the bottom portion of the cabin 200 or the sidewalls of the engine compartment, causing a drop in the heat exchange function of the radiator 101 causes. In recent years, specifically, the adjustment of fuel injection engines has resulted in a tendency in which engines have a higher output, and the engine is operated even at increasingly higher temperatures, which necessitates the cooling efficiency of the engine and the heat exchange function of the radiator 101 to increase.

Accordingly, as disclosed, for example, in Unexamined Japanese Utility Model Publication No. 05-065762 or Japanese Unexamined Patent Publication (KOKAI) No. 2000-204590, a partition member 300 from a flame-retardant resin foam around the radiator 101 arranged around so that the behind the radiator 101 Do not pass any hot air around it to the front of the radiator 101 flows. This partitioning element 300 is in a frame shape according to the outer shape of the radiator 101 educated. Its upper surface elastically contacts the underside of the bottom of the cabin 200 and both side surfaces elastically contact the sidewalls and the like of the engine compartment, showing sealing properties and the flow from behind the radiator 101 existing hot air around it to the front of the radiator 101 prevent.

This partitioning element 300 is generally formed in a prescribed frame shape of a urethane resin foam and by its connection to the radiator 101 used with a double-sided adhesive tape and the like, or by its coupling with bolts or the like. Urethane foam is ideal as a thermally insulating sealing material around the radiator 101 because it has low thermal conductivity, is lightweight, and moreover has excellent conformability due to its elasticity.

Incidentally, in the case of a vehicle used in a cold region, if water penetrated the partition member during a car wash or rainy weather, it may then freeze on the opposing member at the elastic contact portion. Further, there is a problem when the cab 200 shaken, as during an inspection of the engine compartment, and the foreclosure element 300 at the frozen sections breaks, then the sealing properties will decrease dramatically, leaving no choice but the partitioning element 300 to replace.

Even though about that addition, the Japanese unaudited Patent publication (KOKAI) 2000-220467 a sound-insulating material from a low introduces hydrophilic urethane foam, it presents its application as a thermally insulating sealing material around a radiator does not suggest or suggest this.

The The present invention contemplates the aforementioned circumstances and aims to prevent breakage due to freezing.

A thermally insulating sealing material of the present invention surrounding the radiator, which solves the above-mentioned problems, is a thermally insulating sealing material which is provided and disposed around a radiator and which controls the flow of heat from a motor thereabout prevents the front of the radiator by elastically contacting the bottom portion of a cabin, wherein the thermally insulating sealing material comprises a water-repellent urethane foam.

It is particularly preferred that the water-repellent urethane foam a fluorine-containing surface-active Contains funds. additionally it is preferred by casting molds educated.

The thermally insulating sealing material of the present invention prevents the ingress of water during a car wash or Rainy weather, because it is made of a water-repellent urethane foam is formed. As a result, the breakage due to freezing in Cold regions prevented what made it possible for a long time Time span to use.

1 FIG. 15 is a perspective view illustrating the state in which the thermal insulating sealing material of the first embodiment according to the present invention is attached to a radiator. FIG.

2 FIG. 12 is a schematic cross-sectional view illustrating the configuration of an engine room with the thermally insulating sealing material. FIG.

The thermally insulating sealing material of the present invention comprises a water-repellent urethane foam. For the water-repellent urethane foam can one in which a water-repellent agent to a typical Urethane foam is bound, one in which a water-repellent Means contained in the skeleton of urethane foam, one, in which the molecular skeleton of the urethane foam is a water-repellent Group or the like may be used.

It contains fluorine-based and silicone-based water-repellent Agent adhering to a urethane foam by a process can be that by spraying or the like coated. With this procedure, however, a Unevenness in the coating occur because it is difficult a visual confirmation perform, even if there are uncovered areas. This defect can occur in cases where the urethane foam has a complex shape. In addition exists a risk of freezing when exposed to a large amount of water is what can make the water repellent inadequate. Although it additionally possible is a water-repellent solution using a method such as impregnation and then drying the To adhere to urethane foam, there is a problem that the process is complicated.

consequently For example, it is preferred to use a urethane foam which is a water repellent Includes agent in the skeleton of the foam. This type of urethane foam can be prepared by previously mixing a water repellent In the resin foam raw ingredients and foam in the presence of the water repellent agent. In the production with this method For example, it is preferable to use a fluorine-containing surfactant as a water repellent Means to use.

in the Refers to 100 parts by weight of the total amount of a polyol component and a polyisocyanate component, for example, the fluorine-containing surfactants Medium mixed with a proportion of 0.1 to 5 parts by weight and foamed. For the fluorine-containing surface-active Means it is preferred to use one that is organic Group having a fluoroaliphatic group with a carbon number from 3 to 20, especially 6 to 12, and that has an affinity for polyurethane resin Has. The compatibility with the polyurethane resin increases thereby. Among these is one preferably having a perfluoroalkyl group.

If a resin having a water repellent substituent such as a fluoro group in at least one of the polyol component and the polyisocyanate component can be used, then a urethane foam with a water-repellent Group are produced inside the molecular skeleton. If Such a urethane foam is used, the water-repellent Means not desorbed and a higher water repellency can therefore over a long period of time.

Although it is possible to produce the thermally insulating sealing material surrounding the radiator in a predetermined shape by methods such as cutting the urethane foam, it is preferable to use it in the actual state, that is, urethane foam of a predetermined shape formed by casting molds is. Because urethane foam formed by casting molds has an integral skin layer on the surface, the penetration of water into the interior can be further suppressed and freezing can be further prevented. In addition, when formed by casting molds, even com Plete gaskets are adapted inexpensively. In particular, by using a urethane foam having a water repellent agent in the skeleton of the foam having an integral skin layer, in particular, water repellency can be enhanced.

The the cooler surrounding thermally insulating sealing material of the present Invention has a shape that performs sealing properties Wrapping the cooler, elastic contacting of the bottom bottom of the cabin and elastic Contact the side walls on both sides and the like of the engine compartment shows. The means to attach to the radiator are not particular to double-sided adhesive tapes, bolts, interventions by Claws and the like bordered.

The The following explains Concretely, the present invention by embodiments and a comparative example.

First Embodiment

1 FIG. 12 illustrates a perspective view of a radiator provided with the thermally insulating sealing material of the present invention. A thermally insulating sealing material 1 is formed substantially in a U-shape and on a radiator 2 Bound by a bolt so that it covers the upper face and both side faces of the radiator 2 contacted. A steel plate (not shown) for fixing the bolts is integrally molded in the thermally insulating sealing material. The same applies 2 , the upper surface of the thermally insulating sealing material 1 elastically contacts the underside of the floor of the cabin, and both side surfaces elastically contact the inner surfaces of the side walls of the engine compartment, thereby preventing hot air from the engine compartment around it to the front of the radiator 2 flows and the cooling efficiency of the radiator 2 drops.

The thermally insulating sealing material 1 comprises a urethane foam, which is provided with water repellency. Its entire shape is integrally made by casting molds. The following explains the method of manufacturing the thermally insulating sealing material 1 , and replaces a detailed explanation of the composition.

The Polyol component was based on 100 parts by weight of polyol ( "Sumifine® 3063 "polyether polyol, manufactured by Sumika Bayer Urethane Co., Ltd., OH value = 28, functional Group = 3) by mixing 0.15 parts by weight of a fluorine-containing surfactants By means of ("Megafac EXP.TF1068SF ", manufactured by Dainippon Ink and Chemicals, Inc., 60% solids), 2.5 parts by weight Water, 1.3 parts by weight of an amine catalyst and 0.5 parts by weight made of a foaming agent.

Meanwhile, denatured MDI (NCO = 30-31%) was used as the isocyanate component and mixed with the aforementioned polyol component at a mixing ratio of NCO / OH = 0.95 into a mold having a recess in the form of the thermally insulating sealing material 1 injected and foamed at 40 ° C to 70 ° C for 10-30 minutes. The obtained thermally insulating sealing material had an integral skin layer over its entire surface.

In addition, at the same time as forming the thermally insulating sealing material 1 a test piece with the dimensions of 100 × 100 × 50 mm using the same raw ingredients cast off and submitted to the later discussed testing. An integral skin layer was formed over the entire surface of this test piece.

Second Embodiment

Exactly as in the first embodiment became a test piece with the Dimensions of 100 × 100 × 50 mm by forming a urethane foam with a slightly larger shape and then peeled off the integral skin layer. In other Words is the test piece in the present embodiment the same as that in the first embodiment, except that it has no integral skin layer.

Comparative Example 1

The test piece of Comparative Example 1 was prepared in the same manner as in the first embodiment using a polyol component similar to the first embodiment with the exception it was prepared that it did not include the fluorine-containing surfactant. An integral skin layer was formed over the entire surface of this test piece.

Third Embodiment

The entire surface of the test piece of Comparative Example 1 was sprayed with a silicone-based water repellent ("Cosmo Silicon Spray" manufactured by Tsuchiya Co., Ltd.) in an amount of 10 g / m ² so that the test piece of the present embodiment was produced.

<test and evaluation>

The test pieces of the embodiments and the comparative example were mounted horizontally, and a water absorption test was performed by discharging 1 liter of water from above from a height of 50 cm for about 20 seconds. This water absorption test was carried out twice. Table 1 lists the measurement results for the amount of water absorption based on the difference between the weight before the water absorption and the weight after the first and second water absorption. In addition, the percentage of water absorption after the second water absorption test was calculated and the result shown in Table 1. In addition, this test was carried out in each case for different test pieces A, B. Table 1

It It can be seen from Table 1 that the percentage of water absorption for the Test piece everyone embodiment compared with Comparative Example 1 is lower, whereby the Water repellency is shown. In addition, it is out of an opposing Comparison of the embodiments, a urethane foam with a water-repellent agent in the Have skeleton, and above out the test piece of the first embodiment with an integral skin layer clear that this particular excellent water management and as the cooler surrounding thermally insulating sealing material ideal are. The second embodiment also shows an advantageous effect, but remains behind the first embodiment back. Further, the water repellency in the second embodiment, which does not have an integral skin layer, largely degrades itself with a urethane foam with a water repellent agent in the Skeleton. It is thus understood that it is preferable to have an integral one To have skin layer, that is, to produce by casting molds.

This thermally insulating sealing material may break due to Prevent freezing. Shaped from a water-repellent urethane foam by casting molds. The ingress of water during a car wash or rainy weather is prevented.

Claims (3)

Thermally insulating sealing material to a cooler provided and arranged around that the flow of heat from a motor around it to the front of the radiator by elastically contacting the bottom portion of a cabin prevented, wherein the thermally insulating sealing material a water-repellent urethane foam covers. That the radiator surrounding thermally insulating sealing material according to claim 1, wherein the water-repellent urethane foam is a fluorine-containing surface-active Contains funds. That the radiator surrounding thermally insulating sealing material according to claim 1 or claim 2, wherein the cast-off water repellent Urethane foam an integral skin layer on the water repellent Urethane foam has.