JP2008238662A - Mold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold in which a work can be easily inserted and also high accuracy positioning can be performed. <P>SOLUTION: The mold 100 includes a fixture retaining mold 110 for retaining an outer fixture 210 and an inner fixture 220, and a fixture pressing mold 120 moving relative to the fixture retaining mold 110. The fixture retaining mold 110 includes outside sliders S<SB>OUT1</SB>, S<SB>OUT2</SB>for pressing the outer faces of side walls W<SB>OUT1</SB>, W<SB>OUT2</SB>, and inside sliders S<SB>IN1</SB>, S<SB>IN2</SB>for pressing the inner faces of side walls W<SB>IN1</SB>, W<SB>IN2</SB>. The fixture pressing mold 120 includes outside cam drivers D<SB>OUT1</SB>, D<SB>OUT2</SB>for pressing the outer faces of the outside sliders S<SB>OUT1</SB>, S<SB>OUT2</SB>to slide the outside sliders S<SB>OUT1</SB>, S<SB>OUT2</SB>to inside, and an inside cam driver D<SB>IN</SB>for pressing the inner faces of the inside sliders S<SB>IN1</SB>, S<SB>IN2</SB>to slide the inside sliders S<SB>IN1</SB>, S<SB>IN2</SB>to outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a molding die for filling a gap between an outer metal fitting having a cross-sectional groove mold and an inner metal fitting and vulcanizing the rubber.

  The body of an automobile has natural frequencies in various frequency regions. However, if this causes a resonance phenomenon, the vehicle body vibrates violently and the ride quality deteriorates. In view of this, an anti-vibration device called a dynamic damper is attached to the vehicle body, and vibrations in a predetermined frequency range are reduced by the dynamic damper.

  The form of the dynamic damper varies depending on the mounting location and the like, and for example, for example, a cross-sectional groove type inner metal fitting is arranged at a predetermined interval inside the cross-sectional groove type outer metal fitting, and the side wall of the outer metal fitting A vulcanized product in which a gap between the inner metal fitting and the side wall is filled with rubber is known (for example, Patent Document 1 and Patent Document 2). In this type of dynamic damper, the outer metal fitting is a part to be attached to the vehicle body and is called a base bracket or the like. Moreover, the inner metal fitting is a part for attaching a weight, and is called a mass bracket or the like.

  The rubber filling and vulcanization in the gap between the outer metal fitting and the inner metal fitting is usually performed in a state where the outer metal fitting and the inner metal fitting are positioned using a molding die. However, when trying to position the outer bracket and inner bracket with high accuracy, the width of the outer bracket insertion portion and the width of the inner bracket insertion portion of the molding die are made to match the thickness of the outer bracket and the inner bracket as much as possible. It was necessary to keep. For this reason, it may be difficult to insert the outer metal fitting or the inner metal fitting into the molding die, or it may be difficult to take out the product from the molding die.

  On the other hand, if the width of the outer metal fitting insertion part or the inner metal fitting insertion part of the molding die is made too wide than the thickness of the outer metal fitting or the inner metal fitting, the outer metal fitting and the inner metal fitting are accurately positioned. As a result, the dimensional accuracy of the dynamic damper is lowered, and the performance of the dynamic damper may be lowered. This is because if a large error occurs in the distance between the outer metal fitting and the inner metal fitting, a large variation occurs in the resonance frequency of the dynamic damper.

  In addition, if the gap between the outer metal fitting and the die mating surface or the gap between the inner metal fitting and the die mating surface is widened, there is a possibility that rubber leaks from the gap and the yield deteriorates. . In addition, the leaked rubber may make it difficult to attach the dynamic damper to the vehicle body or make it difficult to attach the weight to the dynamic damper.

  The outer bracket and inner bracket can be easily inserted into the bracket holding type (the definition of the bracket holding type will be described later), and it is easy to take out the product from the bracket holding mold, but the outer bracket and inner bracket can be connected with high accuracy. Although it is desirable to be able to position and further prevent rubber leakage due to poor sealing of the outer metal fitting or the inner metal fitting, such a molding die has not been found.

  By the way, until now, although a molding die has been proposed in which an intermediate die can be slid in a horizontal direction with an angular pin (for example, Patent Document 3), a molding die for manufacturing a dynamic damper is proposed. There were no molds that adopted such a structure. In addition, the molding die using the angular pin has a drawback that it is difficult to reduce the size of the die because it is necessary to secure a wide space for moving the die.

JP 2006-258223 A JP 2000-266110 A Japanese Patent No. 2821495

  The present invention has been made in order to solve the above-described problems. The outer metal fitting and the inner metal fitting can be easily inserted into the metal fitting holding mold, and the outer metal fitting and the inner metal fitting can be easily taken out from the metal fitting holding mold. It is an object of the present invention to provide a molding die capable of positioning a metal fitting with high accuracy and further preventing rubber leakage due to a seal failure of an outer metal fitting or an inner metal fitting. It is also an object of the present invention to provide a molding die that can be easily miniaturized.

The above issues
A metal fitting for holding a cross-sectional groove type inner metal fitting having a pair of side walls W _IN1 and W _IN2 inside a cross-sectional groove type outer metal fitting having a pair of side walls W _OUT1 and W _OUT2 at a predetermined interval. Type,
A metal holding mold that moves in a direction approaching or moving away from the metal holding mold,
A mold for vulcanization by filling a rubber in the gap between the gap and / or the side wall _{W OUT2} and the side wall _{W IN2} of the side wall _{W OUT1} and the side wall _{W IN1,}
Outer sliders S _OUT1 and S _OUT2 for inwardly pressing the outer surfaces of the side walls W _OUT1 and W _OUT2 ;
An inner slider _{S IN1, S IN2} for pressing the inner surface of the side wall _{W IN1, W IN2} outwardly,
For the metal fitting holding type,
The outer cam driver _{D OUT1, D OUT2} for sliding the outer slider _{S OUT1, S OUT2} inwardly pressing the outer surface of the outer slider _{S OUT1, S OUT2} inwardly,
An inner cam driver _{D IN} for sliding the inner slider _{S IN1, S IN2} outwardly to press the inner surface of the inner slider _{S IN1, S IN2} outwardly,
This is solved by providing a molding die characterized in that the metal mold pressing die is provided.

Here, the “cross-section groove type outer metal fitting (inner metal fitting)” refers to a groove type metal fitting having a pair of side walls W _OUT1 and W _OUT2 (side walls W _IN1 and W _IN2 ) arranged at a predetermined interval. . The side wall W _OUT1 (side wall W _IN1 ) and the side wall W _OUT2 (side wall W _IN2 ) may be parallel or non-parallel. Further, the side wall W _OUT1 (side wall W _IN1 ) and the side wall W _OUT2 (side wall W _IN2 ) may be provided with a protruding portion such as a flange, a through hole, or a cutout as necessary.

  The “metal fitting holding mold” refers to a mold that holds metal fittings (outer metal fittings and inner metal fittings) among a plurality of molds constituting the molding die. On the other hand, a mold that is paired with a metal fitting holding mold is called a “metal fitting pressing mold”. When the molding die is composed of an upper die and a lower die that open and close in the vertical direction, the lower die is usually a metal fitting holding die and the upper die is a metal holding die. In addition, when the molding die is composed of a fixed mold and a movable mold that slides in the horizontal direction with respect to the fixed mold, the fixed mold is usually a bracket holding mold and the movable mold is a bracket pressing mold. It becomes. However, the present invention is not limited to this configuration, and an upper mold and a lower mold, or a movable mold and a fixed mold may be reversed.

  Furthermore, the description of “a metal-holding die that moves in a direction approaching or moving away from the metal-holding die” is merely a representation of the relative relationship between the metal-holding die and the metal-holding die, and is formed according to the present invention. The metal mold is not limited to the one in which only the metal fitting pressing mold moves. That is, even if both the metal fitting holding mold and the metal holding mold move in a direction approaching or separating from each other, or the metal fitting holding mold does not move and only the metal holding mold moves, the molding metal of the present invention It shall be included in the technical scope of the mold.

  As a result, when the bracket holding mold and the bracket holding mold are opened, the gap between the outer bracket and the bracket holding mold and the gap between the inner bracket and the bracket holding mold are kept wide, while the bracket holding mold and the bracket are secured. When the presser mold is closed, the gap between the outer metal fitting and the metal fitting holding mold and the gap between the inner metal fitting and the metal fitting holding mold can be reduced. Therefore, while improving the insertability of the outer metal fittings and inner metal fittings to the metal fitting holding mold (while making it easy to insert the outer metal fittings and inner metal fittings into the metal fitting holding mold), the outer metal fittings and the inner metal fittings have poor seals. It is also possible to prevent rubber leakage due to the above. In addition, since the dimensional accuracy of the product can be increased, it is possible to obtain a damper having a small variation in resonance frequency and excellent performance. Furthermore, it is possible not only to reduce the size of the molding die compared to the case where angular pins are used, but also to make the molding die excellent in durability.

In the molding die, it is also preferable that the outer sliders S _OUT1 and S _OUT2 and / or the inner sliders S _IN1 and S _IN2 can be detached from the metal fitting holding mold. Accordingly, it is possible to easily perform the maintenance of the molding die such as removing the outer sliders S _OUT1 and S _OUT2 and the inner sliders S _IN1 and S _IN2 from the metal fitting holding mold and cleaning them. Therefore, it is possible to prevent the powder used for the blast cleaning from remaining in the molding die and causing problems such as impairing the slide functions of the outer sliders S _OUT1 and S _OUT2 and the inner sliders S _IN1 and S _IN2. Is also possible.

In the molding die, the inclination angle θ _{OUT with} respect to the vertical direction of the surface pressed by the outer cam drivers D _OUT1 and D _OUT2 in the outer sliders S _OUT1 and S _OUT2 and the inner cam in the inner sliders S _IN1 and S _IN2 . inclination angle theta _iN with respect to the vertical direction of the surface to be pressed against the driver _{D IN1, D IN2} is not particularly limited as long as 45 degrees or less. However, if the inclination angle θ _OUT and the inclination angle θ _IN are too small, the outer sliders S _OUT1 , S _OUT2 and the inner sliders S _IN1 , S _{IN2 are required} unless the metal holding die and the metal holding mold are brought closer to each other. The amount of slide cannot be secured. For this reason, the inclination angle θ _OUT and the inclination angle θ _IN are normally set to 1 degree or more. The inclination angle θ _OUT and the inclination angle θ _IN are preferably 3 degrees or more, and more preferably 5 degrees or more.

On the other hand, the inclination angle θ _{OUT with} respect to the vertical direction of the surface pressed by the outer cam drivers D _OUT1 and D _OUT2 in the outer sliders S _OUT1 and S _OUT2 , and the inner cam drivers D _IN1 and D _IN2 in the inner sliders S _IN1 and S _IN2 . If the inclination angle theta _iN with respect to the vertical direction of the pressing the surface to too large, the frictional force and caused between the outer cam driver _{D OUT1, D OUT2} outer slider _{S OUT1, S OUT2,} the inner cam driver _{D IN1,} D _The frictional force generated between _IN2 and the inner sliders _SIN1 and _SIN2 increases, and the outer sliders _SOUT1 and _SOUT2 and the inner sliders _SIN1 and _SIN2 may not easily slide. For this reason, the inclination angle θ _OUT and the inclination angle θ _IN are normally set to 30 degrees or less. The inclination angle θ _OUT and the inclination angle θ _IN are preferably 20 degrees or less, and more preferably 15 degrees or less.

Furthermore, in the molding die, it is also preferable to provide a convex portion at a portion of the outer sliders S _OUT1 and S _OUT2 that contacts the outer metal fitting and / or a portion of the inner sliders S _IN1 and S _IN2 that contacts the inner metal fitting. This makes it possible to more strongly suppress the seal part of the outer metal fitting and the metal fitting holding type and / or the seal part of the inner metal fitting and the metal fitting holding type, and further prevent rubber leakage due to a seal failure of the outer metal fitting and the inner metal fitting. Is possible.

Furthermore, in the molding die, an outer biasing means for biasing the outer sliders S _OUT1 and S _OUT2 outward, and an inner biasing force for biasing the inner sliders S _IN1 and S _IN2 inward. It is also preferable to provide a biasing means. This makes it possible to automatically return the outer sliders S _OUT1 and S _OUT2 and the inner sliders S _IN1 and S _IN2 to their initial positions when the metal holding type and the metal holding type are opened. In addition to facilitating removal of the product from the mold, it is possible to easily insert the outer metal fitting and the inner metal fitting used for the next molding into the metal fitting holding mold.

  As described above, with the molding die of the present invention, the outer metal fitting and the inner metal fitting can be easily inserted into the metal fitting holding die, and the outer metal fitting and the inner metal fitting can be easily taken out from the metal fitting holding die. It is possible to provide a molding die that can be positioned with high accuracy and that can prevent rubber leakage due to a seal failure of the outer metal fitting or the inner metal fitting. It is also possible to provide a molding die that can be easily miniaturized.

A preferred embodiment of the molding die 100 of the present invention will be described more specifically with reference to the drawings. FIG. 1 is a cross-sectional view showing a state in which an outer metal fitting 210 and an inner metal fitting 220 are held by a metal fitting holding mold 110 in the molding die 100 of the present invention. FIG. 2 is a plan view showing a state in which the outer metal fitting 210 and the inner metal fitting 220 are held by the metal fitting holding mold 110 in the molding die 100 of the present invention. FIG. 3 is an enlarged cross-sectional view showing the periphery of the outer slider S _OUT1 and the inner slider S _IN1 in the molding die 100 of FIG. FIG. 4 is a cross-sectional view showing a state in which the metal fitting presser mold 120 in the molding die 100 of the present invention is lowered. FIG. 5 is a cross-sectional view showing a state in which the metal fitting pressing mold 120 in the molding die 100 of the present invention is further lowered and clamped. FIG. 6 shows a state in which the molding die 100 of the present invention is clamped and the rubber 230 is filled in the gap between the side wall W _OUT1 and the side wall W _IN1 and the gap between the side wall W _OUT2 and the side wall W _IN2. FIG. FIG. 7 is a perspective view showing an example of a product 200 molded using the molding die 100 of the present invention.

1. Outline of Molding Mold As shown in FIGS. 1 and 2, the molding mold 100 of the present invention includes a metal fitting holding mold 110 and a metal fitting pressing mold 120. The arrangement of the metal fitting holding mold 110 and the metal fitting pressing mold 120 and the clamping direction thereof are not particularly limited, but in the molding die 100 of this embodiment, the metal fitting holding mold 110 is a fixed lower mold fixed downward. The bracket pressing mold 120 is a movable upper mold that moves in the vertical direction (direction approaching or moving away from the fixed lower mold (metal holding mold 110)). In the following, for convenience of explanation, the “metal fitting holding type” will be described as “lower mold” and the “metal holding mold” will be described as “upper mold”.

2. Lower mold (bracket holding type)
As shown in FIGS. 1 and 2, the lower mold 110 is provided with an outer metal fitting insertion portion 111 and an inner metal fitting insertion portion 112. The outer metal fitting insertion portion 111 is a portion for inserting the outer metal fitting 210 having a cross-sectional groove shape having a pair of side walls W _OUT1 and W _OUT2 , and the inner metal fitting insertion portion 112 is a pair of side walls W _IN1 and W _IN2. This is a portion for inserting a grooved inner metal fitting 220 having a cross section. The outer metal fitting 210 and the inner metal fitting 220 are held by the lower mold 110 at a predetermined interval.

The lower mold 110 includes outer sliders S _OUT1 and S _OUT2 for inwardly pressing the outer surfaces of the pair of side walls W _OUT1 and W _{OUT2 in} the outer metal fitting 210, and the pair of side walls W _IN1 and W _IN2 in the inner metal fitting 220. Inner sliders S _IN1 and S _IN2 are provided for pressing the inner surface of each of them outwardly. The outer sliders S _OUT1 and S _OUT2 and the inner sliders S _IN1 and S _IN2 can be attached to and detached from the lower mold 110, and maintenance such as cleaning of the molding die 100 can be easily performed. Yes.

The outer sliders S _OUT1 and S _OUT2 are fixed to the tip portions of the pins P _OUT1 and P _OUT2 , and the inner sliders S _IN1 and S _IN2 are fixed to the tip portions of the pins P _IN1 and P _IN2 . The base ends of the pins P _OUT1 and P _OUT2 are biased outward by a coil spring (outer biasing means), and the base ends of the pins P _IN1 and P _IN2 are coil springs (inner biasing means). Is biased inward.

For this reason, even if the outer sliders S _OUT1 and S _OUT2 are slid inward by applying inward pressing force to their outer surfaces, if the pressing force is removed, they slide outward and automatically return to the initial position. It is like that. Further, even if the inner sliders _SIN1 and _SIN2 are slid outward by applying an outward pressing force to the inner surfaces thereof, if the pressing force is removed, the inner sliders _SIN1 and _SIN2 automatically return to the initial positions when the pressing force is removed. It has become.

Inclination angle θ _OUT (FIG. 3) with respect to the vertical direction of outer surfaces (surfaces pressed by outer cam drivers D _OUT1 and D _OUT2 described later) of outer sliders S _OUT1 and S _OUT2 , and inner surfaces (inner sliders S _IN1 and S _IN2 ) The inclination angle θ _IN (FIG. 3) with respect to the vertical direction of the inner cam drivers D _IN1 and D _{IN2 (} described later) is not particularly limited as long as it is 45 degrees or less.

However, if the inclination angle θ _OUT and the inclination angle θ _IN are too small, the sliding amount of the outer sliders S _OUT1 and S _OUT2 and the inner sliders S _IN1 and S _IN2 is ensured unless the lowering distance of the upper mold 120 is secured long. I can't do that. For this reason, the inclination angle θ _OUT and the inclination angle θ _IN are normally set to 1 degree or more. The inclination angle θ _OUT and the inclination angle θ _IN are preferably 3 degrees or more, and more preferably 5 degrees or more.

On the other hand, if the inclination angle θ _OUT and the inclination angle θ _IN are too large, the frictional force generated between the outer sliders S _OUT1 and S _OUT2 in the lower mold 110 and the outer cam drivers D _OUT1 and D _OUT2 in the upper mold 120, frictional force increases occurring between the inner cam driver _{D IN1, D IN2} in the inner slider _{S IN1, S IN2} and the upper mold 120 in the lower mold 110, the outer slider _{S OUT1, S OUT2} and inner sliders _{S IN1, S IN2} May become difficult to slide. For this reason, the inclination angle θ _OUT and the inclination angle θ _IN are normally set to 30 degrees or less. The inclination angle θ _OUT and the inclination angle θ _IN are preferably 20 degrees or less, and more preferably 15 degrees or less.

In the molding die 100 of this embodiment, the inclination angle θ _OUT is set to 10 degrees, and the inclination angle θ _IN is set to 5 degrees.

By the way, in the molding die 100 of the present embodiment, convex portions are provided on the inner surfaces of the outer sliders S _OUT1 and S _OUT2 (surfaces in contact with the outer metal fitting 210), and the side walls W _OUT1 and W _{OUT2 of the} outer metal fitting 210 are provided. The portion where rubber 230 (FIG. 6) is filled inside can be pressed more strongly. Further, convex portions are provided on the outer surfaces of the inner sliders S _IN1 and S _IN2 (surfaces that contact the inner metal fitting 220), and rubber 230 (FIG. 6) is filled on the outer sides of the side walls W _IN1 and W _IN2 of the inner metal fitting 220. The portion to be pressed can be pressed more strongly.

The height of the protrusions provided on the inner surfaces of the outer sliders S _OUT1 and S _OUT2 and the outer surfaces of the inner sliders S _IN1 and S _IN2 is not particularly limited. However, if the convex portion is too high, the outer metal fitting 210 and the inner metal fitting 220 may be deformed or damaged. For this reason, the height of this convex part is normally set to 0.5 mm or less.

3. Upper mold (bracket holding mold)
As shown in FIGS. 1 and 2, the upper mold 120 is configured to press the outer surfaces of the outer sliders S _OUT1 and S _OUT2 in the lower mold 110 inward to slide the outer sliders S _OUT1 and S _OUT2 inward. inner cam driver _{D iN} for the outer cam driver _{D OUT1, D OUT2,} for sliding the inner slider _{S IN1, S IN2} outwardly to press the inner surface of the inner slider _{S IN1, S IN2} in the lower mold 110 outwardly of And are provided.

A portion for pressing the inner slider S _IN1 in the inner cam driver D _IN, and the portion for pressing the inner slider S _IN2, may be those which are separately formed, the mold 100 of the present embodiment These parts are integrally formed, and the molding die 100 is further reduced in size.

4). Next, an operation method and operation of the molding die 100 according to this embodiment will be described. In the molding die 100 of the present embodiment, the outer metal fitting 210 and the inner metal fitting 220 are, as shown in FIG. 1, the outer metal fitting insertion portion 111 and the inner metal fitting in the lower die 110 when the upper die 120 is raised and the mold is opened. Each is inserted into the insertion portion 112.

The width X ₁ of the outer metal fitting insertion portion 111 (the distance between the inner surface of the outer sliders S _OUT1 and S _{OUT2 and} the surface of the lower mold 110 that contacts the inner surface of the outer metal fitting 210) is as shown in FIG. Is considerably wider than the thickness of the outer metal fitting 210 so that the outer metal fitting 210 can be easily held by the lower mold 110.

Further, the width X ₂ of the inner metal fitting insertion portion 112 (the distance between the outer surface of the inner sliders S _IN1 and S _IN2 and the surface that contacts the outer surface of the inner metal fitting 220 in the lower mold 110) is also opened as shown in FIG. In some cases, the thickness of the inner metal fitting 220 is considerably larger than that of the inner metal fitting 220, so that the inner metal fitting 220 can be easily held by the lower mold 110.

  When the outer metal fitting 210 and the inner metal fitting 220 are held by the lower mold 110, the upper mold 120 is lowered as shown in FIGS.

At this time, the outer sliders S _OUT1 and S _OUT2 are pressed inward on the outer surfaces by the outer cam drivers D _OUT1 and D _OUT2 . Therefore, the outer sliders S _OUT1 and S _OUT2 slide inward as the upper mold 120 descends and approaches the lower mold 110. Among them, the inner surfaces of the outer sliders S _OUT1 and S _OUT2 come into contact with the side walls W _OUT1 and W _OUT2 of the outer metal fitting 210 and are pressed from the outside.

The side walls W _OUT1 and W _OUT2 of the outer metal fitting 210 are pressed from the outside by the outer sliders S _OUT1 and S _OUT2 and at the same time try to return to the outside due to the elasticity of the outer metal fitting 210 itself. Therefore, the side wall W _OUT1 and the outer slider S _OUT1 and the side wall W _OUT2 and the outer slider S _OUT2 are in close contact with each other, and the outer metal fitting 210 is in a firmly positioned state.

At the same time, the inner sliders S _IN1 and S _IN2 are pressed outward by the inner cam driver D _IN on the inner surfaces thereof. Therefore, the inner sliders S _IN1 and S _IN2 slide outward as the upper mold 120 descends and approaches the lower mold 110. Among them, the outer surfaces of the inner sliders S _IN1 and S _IN2 come into contact with the side walls W _IN1 and W _IN2 of the inner metal fitting 220 and are pressed from the inner side.

The side walls W _IN1 and W _IN2 of the inner metal fitting 220 are pressed from the inside by the inner sliders S _IN1 and S _IN2 , and at the same time, try to return to the inner side due to the elasticity of the inner metal fitting 220 itself. Therefore, the side wall W _IN1 and the inner slider S _IN1 , and the side wall W _IN2 and the inner slider S _IN2 are in close contact with each other, and the inner metal fitting 220 is in a firmly positioned state.

In a state where the upper mold 120 is lowered to the bottom dead center and is clamped, as shown in FIG. 5, the width of the outer metal fitting insertion portion 111 substantially matches the thickness of the outer metal fitting 210, and the inner metal fitting is inserted. The width of the portion 112 substantially matches the thickness of the inner metal fitting 220. For this reason, the outer metal fitting 210 and the inner metal fitting 220 can be positioned with high accuracy. Molding cavities C are formed in the gap between the side wall W _OUT1 and the side wall W _IN1 and in the gap between the side wall W _OUT2 and the side wall W _IN2 .

  When the clamping is finished, the molding cavity C (FIG. 5) is filled with rubber 230 (FIG. 6) and vulcanized. In the molding die 100 of this embodiment, the rubber 230 is filled through a gate (not shown) provided in the upper die 120.

  The type of rubber 230 filled in the molding cavity C is appropriately selected according to the type of product and is not particularly limited. The types of rubber 230 include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene butadiene rubber (SBR), chloroprene rubber (CR), nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR). Non-diene rubbers such as butyl rubber (IIR), ethylene propylene rubber (EPM, EPDM), silicone rubber (Q), acrylic rubber (ACM) or epichlorohydrin rubber (CO, ECO). Illustrated. Here, the alphabet in the parenthesis after the rubber name is an abbreviation in JISK6397. These rubbers may be used alone or in combination as a blend rubber.

When the vulcanization of the rubber 230 is finished, the upper mold 120 is raised. At this time, since the outer sliders S _OUT1 and S _OUT2 are urged outward by the outer urging means, when the outer cam drivers D _OUT1 and D _OUT2 come out upward, they slide outward and automatically. Return to the initial position. On the other hand, since the inner sliders S _IN1 and S _IN2 are urged inward by the inner urging means, when the inner cam driver _DIN is pulled upward, it slides inward and automatically returns to the initial position. To do. For this reason, the product 200 (FIG. 7) obtained by filling the rubber 230 in the gap between the outer metal fitting 210 and the inner metal fitting 220 and vulcanizing it can be easily taken out from the lower mold 110.

The product 200 obtained in this way has high dimensional accuracy with small errors in the distance between the side wall W _OUT1 and the side wall W _IN1 and the distance between the side wall W _OUT2 and the side wall W _IN2 . Further, the rubber 230 filled in the gap between the side wall W _OUT1 and the side wall W _IN1 and the gap between the side wall W _OUT2 and the side wall W _IN2 does not leak to the periphery. For this reason, not only does it become an obstacle when the outer metal fitting 210 and the inner metal fitting 220 in the product 200 are attached to other parts, but also the yield of the rubber 230 can be improved.

5. Product type The product molded by the molding die 100 of the present invention is rubber in the gap between the side walls W _OUT1 and W _OUT2 of the outer metal fitting of the cross-sectional groove type and the side walls W _IN1 and W _IN2 of the inner metal fitting of the cross-sectional groove type. There is no particular limitation as long as 230 is filled and vulcanized. The molding die 100 of this embodiment is for molding the dynamic damper 200 shown in FIG. The dynamic damper 200 is used by attaching a weight to the inner metal fitting 220 and attaching the outer metal fitting 210 to the car body of the automobile, and can reduce vibrations generated in the car body of the automobile. .

It is sectional drawing which showed the state which hold | maintained the outer metal fitting and the inner metal fitting to the metal fitting holding die in the metal mold | die for shaping | molding of this invention. It is the top view which showed the state which hold | maintained the outer metal fitting and the inner metal fitting to the metal fitting holding die in the metal mold | die for shaping | molding of this invention. FIG. 2 is an enlarged cross-sectional view showing the periphery of an outer slider S _OUT1 and an inner slider S _IN1 in the molding die of FIG. It is sectional drawing which showed the state which lowered | hung the metal fitting pressing die in the metal mold | die for shaping | molding of this invention. It is sectional drawing which showed the state which lowered | hung the metal fitting pressing die in the metal mold | die of this invention further, and was clamped. FIG. 3 is a cross-sectional view showing a state in which a molding die according to the present invention is clamped and rubber is filled in a gap between the side wall W _OUT1 and the side wall W _IN1 and a gap between the side wall W _OUT2 and the side wall W _IN2 . It is the perspective view which showed an example of the product shape | molded using the metal mold | die of this invention.

Explanation of symbols

100 Molding mold 110 Bracket holding mold (fixed lower mold)
111 Outer bracket insertion part 112 Inner bracket insertion part 120 Bracket holding type (movable upper mold)
200 products (dynamic dampers)
210 Outer fitting 220 Inner fitting 230 Rubber C Molding cavity

Claims (5)

A metal fitting for holding a cross-sectional groove type inner metal fitting having a pair of side walls W _IN1 and W _IN2 inside a cross-sectional groove type outer metal fitting having a pair of side walls W _OUT1 and W _OUT2 at a predetermined interval. Type,
A metal holding mold that moves in a direction approaching or moving away from the metal holding mold,
A mold for vulcanization by filling a rubber in the gap between the gap and / or the side wall _{W OUT2} and the side wall _{W IN2} of the side wall _{W OUT1} and the side wall _{W IN1,}
Outer sliders S _OUT1 and S _OUT2 for inwardly pressing the outer surfaces of the side walls W _OUT1 and W _OUT2 ;
An inner slider _{S IN1, S IN2} for pressing the inner surface of the side wall _{W IN1, W IN2} outwardly,
For the metal fitting holding type,
The outer cam driver _{D OUT1, D OUT2} for sliding the outer slider _{S OUT1, S OUT2} inwardly pressing the outer surface of the outer slider _{S OUT1, S OUT2} inwardly,
An inner cam driver _{D IN} for sliding the inner slider _{S IN1, S IN2} outwardly to press the inner surface of the inner slider _{S IN1, S IN2} outwardly,
A mold for molding, characterized in that the metal mold holding die is provided with. The molding die according to claim 1, wherein the outer sliders S _OUT1 and S _OUT2 and / or the inner sliders S _IN1 and S _IN2 can be attached to and detached from the metal fixture holding mold. And the inclination angle theta _OUT with respect to the vertical direction of the surface to be pressed against the outer cam driver _{D OUT1, D OUT2} in the outer slider _{S OUT1, S OUT2,} are pressed to the inner cam driver _{D IN1, D IN2} in the inner slider _{S IN1, S IN2} that the inclination angle theta _iN with respect to the vertical direction of the face, according to claim 1 or 2 mold according set to 1 to 45 degrees. The molding die according to claim 1 or 2, wherein a convex portion is provided on a portion of the outer sliders S _OUT1 and S _OUT2 that contacts the outer metal fitting and / or a portion of the inner sliders S _IN1 and S _IN2 that contacts the inner metal fitting. 2. An outer urging means for urging the outer sliders S _OUT1 and S _OUT2 outward and an inner urging means for urging the inner sliders S _IN1 and S _IN2 inward. 2. The molding die according to 2.

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