JP2007170315A - Muffler and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a muffler manufacturing method, in which long grass fibers are uniformly inserted in a bag and the bag is wound around an inner cylinder so as to facilitate insertion of the inner cylinder into an outer cylinder, scatter of the long glass fibers is prevented, and desired muffling/heat insulation property is exerted. <P>SOLUTION: The long glass fibers G are packed in the bag N, both of verse and reverse face of the bag N are sewed together with the glass long fibers G, the bag N is wound around the inner cylinder 3 so as to form a muffling material S1, and the muffling material S1 is inserted in the outer cylinder 5. The bag N is divided into a plurality of chambers and the long glass fibers G are uniformly filled therein, and the bag is formed flat. It is easy to wind the flat bag N around the inner cylinder 3 and is easy to insert the inner cylinder into the outer cylinder 5, so that the long glass fibers G are uniformly arranged between the outer cylinder and the inner cylinder. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a silencer manufacturing method and a silencer, and in particular, facilitates manufacturing operations to reduce costs, and prevents long glass fibers from being scattered, which is desirable over a long period without adversely affecting the environment. It is related with the thing which can show the sound deadening and heat insulation effect.

  2. Description of the Related Art Conventionally, as a method of mounting a glass fiber as a silencer between an outer cylinder and an inner cylinder of a silencer, a method using a glass fiber packed in a bag is provided.

  As a process of packing the glass fiber into a bag, a glass fiber having a thickness of 7 to 22 μm is made to have a length of 5 cm to 12 cm, and this glass fiber is packed into a bag to create a silencer. Next, after winding the silencer around the inner cylinder, an operator manually inserts it into the outer cylinder and assembles it. The glass fiber melts and disappears with the exhaust heat of the engine (temperature of about 600 ° C.), and functions as a silencer for the silencer.

  According to the conventional method for manufacturing a silencer, a glass fiber stuffed bag cannot be evenly wound on an inner cylinder because it is unequally packed and expanded. Therefore, it is easier to swell than the inner diameter of the outer cylinder, and it takes time and labor to insert the outer cylinder. In the completed silencer, the long glass fibers are loaded in the silencer non-uniformly, so the long glass fibers are easy to move in the silencer due to the exhaust pressure, and are scattered in the air from the punching hole of the inner cylinder. There is a problem that it becomes easy to do. In addition, the glass fiber is liable to shift during use, resulting in density unevenness, which makes it impossible to exhibit the original silencing action and heat insulation action.

  The present invention has been made based on such points, and the object of the present invention is to facilitate the insertion work of the silencer into the outer cylinder to reduce the manufacturing cost and to suppress the scattering of the long glass fibers. An object of the present invention is to provide a silencer manufacturing method and a silencer that can exert a desired silencer and heat insulation effect over a long period of time without adversely affecting the environment.

  In order to achieve the above object, a silencer manufacturing method according to claim 1 of the present invention is characterized in that a bag is filled with long glass fibers, both front and back surfaces of the bag are sewn together with long glass fibers, wound around the inner cylinder, and inserted into the outer cylinder. It is characterized by making it.

  Further, the silencer manufacturing method according to claim 2 of the present invention is characterized in that the bag is divided into a plurality of portions, each portion is filled with a long glass fiber, wound around the inner cylinder, and inserted into the outer cylinder. Is.

  According to a third aspect of the present invention, there is provided a silencer manufacturing method comprising dividing a bag into a plurality of parts, filling each part with a glass long fiber, sewing both sides of the bag together with the glass long fiber, And is inserted into an outer cylinder.

  According to a fourth aspect of the present invention, there is provided a silencer comprising: an outer cylinder; a porous inner cylinder disposed inside the outer cylinder; and a long glass fiber in the bag disposed between the outer cylinder and the inner cylinder. And a sound deadening material obtained by winding a material in which both front and back surfaces are sewn together with long glass fibers.

  A silencer according to claim 5 of the present invention is divided into a plurality of bags arranged between an outer cylinder, a porous inner cylinder arranged inside the outer cylinder, and the outer cylinder and the inner cylinder. And a sound-absorbing material obtained by winding a material filled with long glass fibers.

  A silencer according to claim 6 of the present invention is divided into a plurality of bags arranged between an outer cylinder, a porous inner cylinder arranged inside the outer cylinder, and the outer cylinder and the inner cylinder. And a silencing material in which a long glass fiber is stuffed into the formed portion and both the front and back surfaces of the bag are sewn together with the long glass fiber.

  First, in the case of the silencer manufacturing method of the present invention, after stuffing a glass long fiber into a bag, both sides of the bag are sewn together with the glass long fiber, or a long glass fiber is divided into a plurality of divided parts of the bag. Are separately stuffed, or the long glass fibers are separately stuffed into a plurality of divided parts of the bag, and then both the front and back surfaces of the bag are sewn together with the long glass fiber. As a result, the long glass fibers are uniformly filled in the bag and adjusted to a uniform thickness, and the long glass fibers do not move within the bag. Therefore, when this is wound around the inner cylinder, it does not bulge partially and becomes a uniform thickness, so that it can be easily inserted into the outer cylinder.

  In addition, the completed silencer is a glass long fiber that is evenly loaded between the outer cylinder and the inner cylinder, so that it does not move through the silencer due to the exhaust pressure, and from the punching hole of the inner cylinder. There is no risk of splashing into the air. Moreover, since there is no possibility that the above-mentioned long glass fiber is displaced and density unevenness does not occur, the original silencing action and heat insulation action are always exhibited.

  According to the silencer manufacturing method and the silencer of the present invention, the glass long fibers are made uniform by sewing and sorting after the long glass fibers are packed in the bag so that the long glass fibers are not displaced. Therefore, since the silencer wound around the inner cylinder can be easily inserted into the outer cylinder, the silencer can be easily manufactured and the manufacturing cost can be reduced. In addition, since the long glass fibers are evenly arranged between the outer cylinder and the inner cylinder, scattering of the long glass fibers can be suppressed, and the desired noise-reducing and heat-insulating effects can be achieved over a long period without adversely affecting the environment. it can.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The silencer 1 of the present invention is for a motorcycle, and its configuration is schematically shown in FIG. First, there is a porous inner cylinder 3 and an outer cylinder 5 that forms the appearance of the silencer 1, and a long glass fiber G that functions as a silencer is filled between them. The manufacturing process of the silencer 1 of the present invention will be described. First, as shown in FIG. 2, a rectangular bag (for example, 330 cm × 480 cm) N is prepared. As the bag N, a bag made of nylon or a bag made of nonwoven fabric made of polypropylene or polyethylene terephthalate is suitable, but is not limited to this, and other synthetic resin bags may be used. It is also possible to use a mesh-like bag. Next, a predetermined amount of long glass fiber G is packed in the bag N. Specifically, a long glass fiber G having a thickness of 7 to 22 μm and excellent in endless heat resistance is injected into the bag N with an air nozzle E and filled with about 300 grams. In this way, the long glass fiber G in the bag is made.

  Next, as shown in FIG. 4, both the front and back surfaces of the bag N are sewn. Specifically, it is sewn with, for example, about 3 welding lines L with a sewing machine using a synthetic resin thread or the like. When sewing both the front and back surfaces of the bag N, the bag N is pressed with a holding jig or the like, and is sewn at the same time in a state where the long glass fibers G are uniformly packed. As a result, the bags N are divided in a state where the long glass fibers G are uniformly filled, and are adjusted to a uniform thickness. Moreover, the glass long fiber G of the bag N is thereby held so as not to shift.

  Next, as shown in FIG. 4, the long glass fiber G is wound around the inner cylinder 3 having punching holes, and the ends are fixed by bonding or the like to form a cylindrical sound deadening material S1. At this time, since the long glass fiber G is prevented from shifting by sewing, even the one wound around the inner cylinder 3 does not have uneven density and has a uniform thickness.

  In this state, the silencer S <b> 1 is inserted into the outer cylinder 5 together with the inner cylinder 3. At that time, the sound deadening material S1 does not bulge partially and has a uniform thickness, so that it can be easily inserted into the outer cylinder 5. Thereafter, the silencer 1 is completed through a predetermined manufacturing process.

  In the silencer 1, since the long glass fiber G is uniformly loaded between the outer cylinder 5 and the inner cylinder 3, the silencer 1 does not move in the silencer 1 due to exhaust pressure, and the punching hole of the inner cylinder 3 There is no risk of splashing into the air. Moreover, since there is no possibility that the said glass long fiber will slip | deviate and a density nonuniformity will not arise, the original muffling effect | action and heat insulation effect are maintained over a long period of time.

  The bag N may be melted and extinguished by the exhaust heat of the engine (temperature of about 600 ° C.), or may be left in a non-woven fabric or mesh shape.

  As described above, according to this embodiment, first, the silencer can be easily manufactured, and the manufacturing cost can be reduced. That is, after the long glass fiber is packed in the bag, the thickness of the long glass fiber is made uniform by sewing and sorting so that the long glass fiber does not shift. Thus, the sound deadening material can be easily inserted into the outer cylinder, and the manufacture becomes easy. In addition, since the long glass fibers are uniformly filled between the outer cylinder and the inner cylinder without uneven density, scattering of the long glass fibers due to exhaust pressure can be suppressed, and adverse effects on the environment can be prevented. In addition, the desired silencing / insulating effect can be exhibited over a long period of time.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the case of this embodiment, as shown in FIG. 5, a bag N that is long in one direction (for example, length 750 cm × width 12 cm) is prepared. A silencing material S2 containing a flat bag N1 is made by sewing. As shown in FIG. 6, the sound deadening material S <b> 2 is spirally wound around the inner cylinder 3 having a punching hole, and the end portion is fixed by bonding or the like to form a cylinder. In this state, the silencer S1 is inserted into the outer cylinder 5. Thereafter, the silencer 1 is completed through a predetermined manufacturing process. Since other configurations are the same as those in the first embodiment, the same portions are denoted by the same reference numerals, and description thereof is omitted.

  According to the method for manufacturing the silencer 1, the bag N is divided into a plurality of chambers by packing the glass long fibers G into the bag N that is long in one direction and then sewing or welding the front and back of the bag N. The long glass fiber G is uniformly filled and has a flat shape. By winding the flat bag N around the inner cylinder 3 spirally, the long glass fiber G is uniformly wound around the inner cylinder 3, and the long glass fiber G does not swell more than the inner diameter of the outer cylinder. Insertion into the outer cylinder 5 can be performed easily and reliably. Further, the long glass fibers G are uniformly arranged between the outer cylinder 5 and the inner cylinder 3.

  The long glass fiber G may be melted by the exhaust heat of the engine (temperature of about 600 ° C.) and disappear, or may remain in the form of a nonwoven fabric or mesh. And since the completed silencer 1 has the glass long fiber G equally loaded in the silencer 1, the long glass fiber G does not move in the silencer 1 by exhaust pressure, and the inner cylinder 3 Scattering into the air from the punching hole is also prevented. As a result, the original silencing action and heat insulation action are maintained over a long period of time.

  Next, a third embodiment of the present invention will be described with reference to FIGS. In the case of this embodiment, first, in order to divide the bag N into a plurality of (for example, three) chambers n1, n2, and n3 in advance, the dividing line L0 is formed by sewing or welding in one direction. For the welding, a heat sealing method using a heat sealer, a high frequency sewing machine or the like is employed. Next, each chamber n1, n2, n3 is filled with about 100 grams of long glass fiber G by an air nozzle E to produce a silencer S2 containing a flat bag N2.

  The flat bag N2 is inserted into the outer cylinder 5 after being wrapped around the inner cylinder 3 and fixed as shown in FIG. Thereafter, the silencer 1 is completed through a predetermined manufacturing process. Since other configurations are the same as those in the first embodiment, the same portions are denoted by the same reference numerals, and description thereof is omitted. Also in this embodiment, the glass long fibers can be evenly arranged in the bag. Thereby, since it can insert in an outer cylinder easily, a silencer can be manufactured easily. In addition, since the long glass fibers are evenly arranged between the outer cylinder and the inner cylinder, scattering of the long glass fibers can be suppressed, and the desired noise-reducing and heat-insulating effects can be achieved over a long period without adversely affecting the environment. A muffler can be obtained.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS. In this embodiment, first, the dividing line L0 is formed by sewing or welding in one direction so as to divide the bag N into a plurality of (for example, three) chambers n1, n2, and n3 in advance. Next, each chamber n1, n2, n3 is filled with about 100 grams of long glass fiber G by an air nozzle E to produce a silencer S2 containing a flat bag N2.

  Next, both the front and back surfaces of the bag N are sewn together with the long glass fiber G. For example, the three-part dividing line L is sewn in a direction different from the dividing direction of the chamber, and is divided into smaller chambers to produce a silencer S3 containing a flat bag N3.

  The flat bag N3 is inserted into the outer cylinder 5 after being wound around the inner cylinder 3 and fixed as shown in FIG. Thereafter, the silencer 1 is completed through a predetermined manufacturing process. Since other configurations are the same as those in the first and second embodiments, the same portions are denoted by the same reference numerals, and description thereof is omitted. Also in this embodiment, the glass long fibers can be evenly arranged in the bag. Thereby, since it can insert in an outer cylinder easily, a silencer can be manufactured easily. In addition, since the long glass fibers are evenly arranged between the outer cylinder and the inner cylinder, scattering of the long glass fibers can be suppressed, and the desired noise-reducing and heat-insulating effects can be achieved over a long period without adversely affecting the environment. A muffler can be obtained.

  The present invention is not limited to the above-described embodiments, and appropriate design changes can be made within the scope of the invention. For example, in the second embodiment, a bag that is long in one direction may be divided into a plurality of chambers in advance, and each chamber may be filled with long glass fibers to produce a bag-containing silencer. Moreover, when sewing a bag long in one direction in the second embodiment, it may be divided into a plurality of chambers at short intervals along the longitudinal direction, and this may be spirally wound around the inner cylinder. In the above-described embodiments, the range in which the bag is sewn or welded may be entirely sewn or welded in a straight line, or may be partially sewn or welded, such as a dotted or broken line. Anyway. In short, the bag may be divided into a plurality of chambers so that the long glass fibers can be uniformly dispersed and arranged. In the case of such an embodiment, the same operational effects as those of the above embodiments can be obtained.

  The method for manufacturing a silencer of the present invention has been described as an example of a silencer for a motorcycle as an example, but can also be applied to a silencer for a four-wheeled vehicle, a general-purpose engine, or the like.

It is a figure which shows the 1st Embodiment of this invention and is sectional drawing of a silencer. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the state which fills a bag with a glass long fiber. It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the state which divided | segmented the bag into the several chamber. It is a figure which shows the 1st Embodiment of this invention and is a perspective view which shows the insertion state of the silencer in a bag to a silencer. It is a figure which shows the 2nd Embodiment of this invention, and is a perspective view which shows the state which divided | segmented the bag into the several chamber. It is a figure which shows the 2nd Embodiment of this invention, and is a perspective view which shows the insertion state of the silencer in a bag to a silencer. It is a figure which shows the 3rd Embodiment of this invention, and is a perspective view which shows the state which fills a glass long fiber into the bag which divided the bag into the several chamber. It is a figure which shows the 3rd Embodiment of this invention, and is a perspective view which shows the silencing material with a bag divided | segmented into the several chamber. It is a figure which shows the 4th Embodiment of this invention, and is a perspective view which shows the state which fills the glass long fiber in the bag which divided | segmented the bag into the several chamber. It is a figure which shows the 4th Embodiment of this invention, and is a perspective view which shows the silencing material with a bag divided | segmented into the several chamber.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Silencer 3 Inner cylinder 5 Outer cylinder E Air nozzle L0 Dividing line G Glass fiber N bag n1, n2, n3 Chamber S1-S3 Silencer

Claims (6)

  A muffler manufacturing method comprising filling a bag with long glass fibers, sewing both front and back surfaces of the bag together with the long glass fibers, wrapping them around an inner cylinder and inserting the same into an outer cylinder.   A muffler manufacturing method, wherein a bag is divided into a plurality of parts, each part is filled with long glass fibers, wound around an inner cylinder, and inserted into an outer cylinder.   Silencer manufacturing, characterized in that the bag is divided into a plurality of parts, each part is filled with long glass fibers, and both the front and back sides of the bag are sewn together with the long glass fibers, which are wound around the inner cylinder and inserted into the outer cylinder. Method.   The outer cylinder, the porous inner cylinder arranged inside the outer cylinder, and both the front and back surfaces of the bag filled with the glass long fibers arranged between the outer cylinder and the inner cylinder were sewn together with the glass long fibers. A muffler comprising a muffler wound with a thing.   Winding an outer cylinder, a porous inner cylinder arranged inside the outer cylinder, and a portion of the bag that is divided between the outer cylinder and the inner cylinder and filled with glass long fibers. A silencer comprising: a turned silencer.   An outer cylinder, a porous inner cylinder arranged inside the outer cylinder, and a portion of the bag which is arranged between the outer cylinder and the inner cylinder and which is divided into a plurality of parts, is filled with long glass fibers and the front and back sides of the bag A silencer comprising: a silencing material wound with both sides sewn together with long glass fibers.

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