JP2008121460A - Heat-resistant band cloth, and reinforcing method of heat-resistant band cloth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-resistant band cloth hardly causing loosening, usable while keeping certain performance over a long term, and wound around an exhaust pipe of an engine. <P>SOLUTION: This heat-resistant band cloth 100 is formed by weaving up a silica fiber 104 into a band-like form so as to be wound around an exhaust pipe of an engine, and composed by interweaving at least one metallic string 102 therein along the longitudinal direction L. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat-resistant band cloth wound around an exhaust pipe of an engine and a method for reinforcing the heat-resistant band cloth.

  Conventionally, radiant heat from an exhaust pipe (for example, an exhaust manifold, a turbine periphery, a muffler, etc., the same applies hereinafter) of an engine mounted on an automobile or motorcycle is shielded by using a heat shield plate made of metal or the like as necessary. The structure was heated. This has been taken as a measure for preventing the radiant heat from the exhaust pipe from adversely affecting the members arranged around the exhaust pipe. Specifically, peripheral members are melted by radiant heat (especially in recent years, resin parts tend to be used for weight reduction, etc.), life is shortened, and fluids are boiled. This is in order to prevent such as. Such heat shielding by the heat shielding plate brings about a certain effect when a user of an automobile or a motorcycle uses an automobile or the like under normal use conditions.

  However, some users do not use automobiles or the like under so-called “normal use conditions” (hereinafter, such users are referred to as “partial users”). Specifically, when performing so-called “tuning” such as increasing the displacement or increasing the turbocharging pressure to improve engine output, or driving a car on a dedicated course represented by a circuit or the like. User. Engines used by some of these users have greatly increased the amount of heat generated in combination with improved output and harsh usage environments. As a result, the radiant heat from the exhaust pipe also increases, and heat shielding with a simple heat shield is insufficient.

  On the other hand, as described above, some users increase the amount of exhaust gas, increase the supercharging pressure, etc. in order to improve the output of the engine, so the amount of exhaust gas itself often increases. In such a case, it is necessary to exhaust the increased exhaust gas smoothly. In order to cope with such an increase in exhaust gas, for example, an increase in the diameter of the exhaust pipe can be considered. There was a problem that the engine characteristics decreased and the engine characteristics became difficult to handle.

  The exhaust gas of the engine is a high-temperature gas. It is a well-known fact that when a gas passes through a pipe having a certain thickness, the higher the temperature of the gas, the smaller the flow resistance and the smoother the flow.

  In order to solve these problems, a contrivance has been made to wind a heat-resistant strip (bandage) directly around the exhaust pipe rather than simply providing a heat shield. As a result, radiant heat from the exhaust pipe is effectively blocked, and at the same time, the temperature of the exhaust gas in the exhaust pipe is kept high, thereby ensuring smooth exhaust. Regarding the winding of the heat-resistant band cloth around the exhaust pipe, it is shown in the following non-patent document.

  This heat-resistant band cloth is formed by weaving fibers having heat resistance such as glass fiber to a predetermined width (for example, 2.5 cm width, 5 cm width, etc.) (see FIG. 3).

"OPTION2" September 2006, p25 Sanei Shobo "CARBOY" January 2002 p350 Yaesu Publishing “NEKO MOOK 348 Auto Maintenance” May 2002 p34 Cat Publishing Inc. "Holiday Auto" May 2001 issue p158 Motor Magazine

  However, the heat-resistant woven fabric wound around the exhaust pipe is unraveled (frayed) and becomes unusable within a short period of time (or even though it can be used, the heat shielding effect etc. is halved). (See FIGS. 4 to 6).

  This is because the object to be wrapped around the heat-resistant belt is an exhaust pipe of an engine of a car or the like and is constantly being vibrated, and further, wind pressure and foreign matter (pebbles, sand, etc.) ) And the contact of tools and the like during maintenance.

  The present invention has been made in order to solve such problems, and is resistant to unraveling and is a heat-resistant zone wound around an exhaust pipe of an engine that can be used while maintaining a certain performance for a long period of time. Provide a cloth.

  The present invention relates to a heat-resistant band fabric in which heat-resistant fibers are woven into a strip shape to be wound around an exhaust pipe of an engine, and by weaving at least one metal thread along the length direction. This has solved the above-mentioned problems.

  By adopting such a configuration, it has become possible to reduce the unraveling of the heat-resistant belt. A heat-resistant woven fabric is composed of heat-resistant fibers (for example, an inorganic substance such as silica (SiO2) is the main component). However, since it is woven with thin fibers, "". However, it has been found that if the exhaust pipe reaches a high temperature even when it is wound around the exhaust pipe, the fiber itself becomes a so-called “quenched” state, resulting in “brittleness”. In particular, when this “quenching” is repeatedly performed as the engine is repeatedly stopped and started, the “brittleness” becomes more obvious and the “flexibility” is lost. As a result, part of the fiber is unraveled by vigorous vibration of the engine, wind pressure during travel, foreign objects, and contact with tools during maintenance, and the unfolding gradually spreads around the unraveled part. As a result, the inventor has learned that the above-mentioned problem (problem that the heat shielding effect etc. is reduced by half even though it cannot be used or can be used within a short period of time) has occurred. The inventor who pays attention to this point prevents the occurrence of unraveling itself by weaving a metal thread that is heat resistant and strong in tension (having tensile strength) along the length direction of the heat resistant belt. At the same time, even if a problem arises, the company succeeded in preventing the problem from spreading around.

  Various modes of weaving metal yarn can be considered. For example, it can be considered that the heat-resistant woven cloth is woven along the length direction at both ends in the width direction. Both end portions in the width direction are one of the portions that are most easily unraveled in shape. It is possible to effectively prevent the unraveling by weaving a metal thread into this portion.

  In addition, if a metal yarn made of a plurality of metal fibers twisted together is used, the strength of the metal yarn itself can be increased, which is more effective in preventing unraveling. . In addition, since the flexibility of the metal yarn itself is exhibited, it is difficult to cause resistance during winding, and winding work is not difficult.

  Further, when the present invention is applied to a case where silica is contained in a fiber having heat resistance, and the content of the silica is preferably 80% by weight or more, more preferably 94% by weight or more. The effects of the present invention can be exhibited most. In order to improve the heat-resistant temperature characteristic of the fiber having heat resistance, for example, it is possible to cope by increasing the content of silica. As a result of the improvement in heat resistance, the heat-resistant band cloth itself can be made thin, and it is easy to wind and a lightweight heat-resistant band cloth can be realized. However, if it is configured in this way, the vulnerability to unraveling increases.

  The present invention relates to a method of reinforcing a heat-resistant strip cloth in which fibers having heat resistance are woven into a strip shape so as to be wound around an exhaust pipe of an engine. It can also be understood as a method of reinforcing a heat-resistant woven fabric characterized by weaving metal yarn along the length direction.

  By applying the present invention, it is possible to prevent the heat-resistant strip cloth wound around the exhaust pipe of the engine from being unwound, and the heat-resistant strip cloth can be used for a longer period of time than before.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a heat-resistant strip 100 showing an example of an embodiment of the present invention. FIG. 2 is a perspective view including a cut portion of the heat resistant strip 100.

  The heat-resistant band cloth 100 is configured by weaving one metal thread 102 at each end in the width direction W along the length direction L of the heat-resistant fiber 104 woven into a band shape. Both end portions in the width direction W are one of the portions where the shape is most likely to be unraveled. Unraveling can be effectively prevented by weaving the metal yarn 102 having excellent tensile strength into this portion.

  In the present embodiment, the composition of the heat resistant fiber 104 is 94% by weight or more of silica (SiO 2), 3% by weight or more of alumina (Al 2 O 3), and 0.3% by weight or more of sodium oxide. In this way, when the content of silica is high for the purpose of improving the heat resistance characteristics, for example, it becomes possible to configure the heat-resistant band cloth to be thin, and it is easy to wind and a lightweight heat-resistant band cloth can be realized. . However, such a thin configuration increases vulnerability to unraveling, so that the effect of preventing unraveling by applying the present invention is great. Of course, the composition of the heat resistant belt is not limited to this, and the silica content may be smaller. It is possible to select and configure an optimum composition according to the temperature of the exhaust pipe around which the heat-resistant band cloth is wound.

  Also, the weaving method of the heat resistant fiber 104 is not particularly limited.

  Further, the metal yarn 102 in the present embodiment is configured by twisting stainless steel (SUS304) fibers. Therefore, the strength of the metal yarn itself can be increased, which is more effective in preventing the unraveling. In addition, since the flexibility is exhibited in the metal thread itself, it is difficult to become resistance during winding, and the winding work is not difficult.

  Further, in the present embodiment, one metal thread 102 is woven at both ends in the width direction, but various modes are conceivable as to how the metal thread 102 is woven. For example, weaving may be performed at predetermined intervals (for example, 5 mm) in the width direction. By doing so, the effect of preventing the unraveling can be exhibited. Moreover, it is good also as a structure which weaves a total of three at both ends and its center. By doing so, it is possible to efficiently prevent the unraveling while suppressing an increase in cost due to the weaving of the metal yarn 102. In some cases, a configuration may be adopted in which only one of the both ends in the width direction is woven. Normally, when the heat-resistant strip 100 is wound around the exhaust pipe, it is wound in order while overlapping a part of itself (heat-resistant strip), so that one of the width directions is formed on the wound surface. Often only the edges appear. Therefore, by effectively weaving the metal yarn 102 only at the width direction end portion on the side that appears on the surface (and in addition, at the width direction center portion), the function of effectively preventing unraveling is effectively exhibited while further reducing the cost. It becomes possible.

  In addition, as a secondary effect, weaving a metal thread having tensile strength increases the tensile strength in the length direction of the entire heat-resistant woven fabric, improving durability against tension generated during winding and using it. Even at times, durability against external pulling is improved.

  The heat-resistant strip cloth 100 in the present embodiment is manufactured by simultaneously weaving the metal yarn 102 and the heat-resistant fiber 104 set in advance in a machine (weaving machine). Of course, it is not limited to this manufacturing method, and it is also possible to manufacture the metal yarn 102 after weaving only the heat-resistant fiber 104 and then weaving it.

  In addition, the usage method of the heat resistant strip 100 is not significantly different from the conventional one, and it is wound around the exhaust pipe of an engine of a car, a motorcycle, etc. to shield the radiant heat from the exhaust pipe and to reduce the temperature of the exhaust gas. Used to prevent.

  The heat-resistant strip according to the present invention is wound around an exhaust pipe of an automobile or motorcycle engine to prevent radiant heat from the exhaust pipe and to prevent a decrease in exhaust temperature.

The perspective view of the heat-resistant strip cloth 100 which shows an example of embodiment of this invention. The perspective view containing the cutting part of the heat-resistant band cloth 100 Conventional heat-resistant belt Example 1 of unraveling in a state in which a conventional heat-resistant strip is wound around an exhaust pipe Example 2 of unraveling when a conventional heat-resistant strip is wound around an exhaust pipe Example 3 of unraveling in a state in which a conventional heat-resistant strip is wound around an exhaust pipe

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Heat-resistant strip cloth 102 ... Metal thread 104 ... Heat-resistant fiber

Claims (6)

A heat-resistant strip cloth woven into a strip of heat-resistant fiber to be wound around the exhaust pipe of an engine,
A heat-resistant woven fabric characterized in that at least one metal thread is woven along the length direction. In claim 1,
The metal yarn is woven into both ends in the width direction of the heat-resistant band cloth. In claim 1 or 2,
The metal yarn has a configuration in which a plurality of metal fibers are twisted together. In any one of Claims 1 thru | or 3,
The heat-resistant woven fabric characterized in that the content of silica in the heat-resistant fiber is 80 weight percent or more. In claim 4,
Content of the silica in the fiber which has the said heat resistance is 94 weight% or more. A method for reinforcing a heat-resistant strip cloth in which heat-resistant fibers are woven into a strip shape to be wound around an exhaust pipe of an engine,
A method for reinforcing a heat-resistant band cloth, characterized in that metal yarns are woven along the length direction at both ends in the width direction of the heat-resistant band cloth.

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