JP2009096121A - Manufacturing mold for cylindrical vibrationproof mount - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing mold for a cylindrical vibrationproof mount which can effectively prevent the mixture of different kinds of rubber at the side of a shaft member where the adjacent different kinds of rubbers are arranged closest to each other, even when the shaft member and a cylindrical member which surrounds the shaft member with a space are interconnected by arranging two or more kinds of rubber, which extend radially etc. against the central axis of the shaft member, alternately around the shaft member. <P>SOLUTION: The manufacturing mold for a cylindrical anti-vibration mount is produced by forming rubber materials from two or more kinds of rubber arranged around the shaft member while interconnecting the shaft member 2 and the cylindrical member 3, which surrounds the shaft member 2 with a space, by the rubber materials. Partitioning members 25 are provided between the shaft member 2 and the cylindrical member 3 to partition different kinds of rubber, and rubber storing grooves 29 extending in the axial direction of the shaft member are also provided on surface parts of the partitioning members 25 on the shaft member side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing mold for a cylindrical vibration-proof mount suitable for use as an automobile body mount, cab mount or the like, and in particular, surrounds a shaft member and the shaft member with a space therebetween. When manufacturing a cylindrical anti-vibration mount in which a cylindrical member is interconnected by a rubber material composed of multiple types of rubber, mixing of different types of rubber is prevented, and the required physical properties of the anti-vibration mantle are obtained. The present invention proposes a technique that ensures the securing and eliminates the possibility of a decrease in durability caused by separation between different types of rubber.

  Examples of the different rubber composite vibration isolator using a plurality of types of rubber include those described in Patent Documents 1 and 2, and the vibration isolator described in Patent Document 1 is a mixture of different rubbers. In order to prevent this, at the boundary between the main body rubber and the main stopper rubber disposed between the inner metal fitting and the outer metal fitting, a rubber parting part that makes them discontinuous is provided, and in this rubber parting part, The rubber reservoir part which consists of the rubber | gum which wraps around from the main-body part rubber | gum side is formed, and the vibration isolator described in patent document 2 has an inner metal fitting and the outer metal fitting arrange | positioned on this outer side at intervals. A rubber arm stopper that protrudes from the outer metal fitting along the input direction of the main vibration to be vibrated into a closed space formed between the arm and the outer metal fitting, and a rubber arm to be connected. And with In a vibration isolator comprising a combination of different rubbers having different composition or physical properties of the rubber constituting the arm part and the rubber constituting the main stopper part, a partition member is arranged at the connecting part between the arm part and the outer metal fitting, A rubber with low hardness is injected from the part side runner to form the arm part integrally with the inner metal fitting, and at the same time, the main stopper part is formed integrally with the outer metal fitting, and each of the arm part side and the main stopper part side is formed by the partition member. This prevents rubber from entering.

Japanese Patent Laid-Open No. 10-113931 JP-A-10-113932

  By the way, although the prior art described in patent document 1 provides the rubber reservoir part in a rubber parting part in the outer metal fitting side, by this, for example, an inner metal fitting and an outer metal fitting are inserted between both metal fittings. When different types of rubber extending radially with respect to the central axis of the inner metal fitting are alternately arranged around the inner metal fitting and interconnected, the adjacent dissimilar rubbers are positioned closest to each other. There has been a problem that it is not possible to effectively prevent the mixing of these different types of rubber on the inner metal fitting side to be performed.

  Moreover, in the prior art described in Patent Document 2, since the arm portion and the main stopper portion are joined via a partition member made of a metal plate, an increase in cost and weight corresponding to the partition member is denied. In addition, due to variations in the dimensions of the partition member, a gap may be formed between the mold and the partition member, and different types of rubber may be mixed by the rubber flowing through the gap.

  SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems of the prior art, and the object of the present invention is to provide a shaft member and a cylinder surrounding the shaft member with a space therebetween. Adjacent dissimilar rubbers are closest to each other even when multiple types of rubber that extend radially with respect to the central axis of the shaft member are alternately arranged around the shaft member and interconnected. It is possible to effectively prevent mixing of different types of rubber on the shaft member side, and separate components by making the component part of the mold itself function as a partition member. Further, it is not necessary to additionally dispose the rubber, and the rubber is retained in the gap between the shaft member and the mold due to the variation in the dimensions of the shaft member due to the rubber retaining groove on the surface portion of the partition member at least on the shaft member side. Flows It is even, to provide a cylindrical elastic mount for manufacturing mold which can prevent mutual mixed dissimilar rubbers.

  A manufacturing die for a cylindrical vibration-proof mount according to the present invention includes, for example, a shaft member that can be formed in a cylindrical shape, and a cylindrical member that surrounds the shaft member with a space therebetween, by a rubber material. For example, it manufactures a cylindrical vibration-proof mount that is formed by a plurality of types of rubber that are concentrically interconnected and whose rubber material is disposed around a shaft member and extends radially. For example, a partition member having a divided structure is provided between the member and the cylindrical member to separate different types of rubber, and at least a surface portion of the partition member on the shaft member side is provided with the shaft member. A rubber reservoir groove extending in the axial direction is provided.

  Here, with respect to the outer peripheral surface of the shaft member, the partition member disposed with a slight gap that allows the inflow of rubber into the rubber retaining groove is inserted into the mold, and the shaft member and the cylindrical member For example, in order to smoothly and easily remove and remove the partition member from the manufactured cylindrical vibration-proof mount, each of the above is positioned and supported appropriately according to the shape thereof, for example, in the axial direction of the shaft member A three-part structure can be adopted.

  In this case, for example, when the shaft member is composed of a member having a flange at one end thereof, and the cylindrical member forms a rotating body structure having an L-shaped vertical cross section, the partition member has the flange of the shaft member on the lower mold. The lower part to be positioned and held, the middle part to position and support the cylindrical member in surface contact with the lower part, the other end of the shaft member is held, and the inner part of the cylindrical member is fitted, It can comprise with the upper type | mold which is surface-contacted to a middle step part, and serves also as the upper step part.

  In such a manufacturing mold, more preferably, the surface of the partition member on the surface side on the shaft member side and the surface portion on the side of the tubular member are respectively in the axial direction of those members, and thus the cylindrical shape to be manufactured. Respective rubber reservoir grooves extending in the axial direction of the vibration isolating mount are provided.

  Preferably, the partition member is set at a corner portion of a shaft member having an out-of-plane contour shape forming a polygonal shape and / or a cylindrical member having an in-plane contour shape forming a polygonal shape.

  In the manufacturing mold for a cylindrical vibration-proof mount according to the present invention, in particular, a rubber retaining groove is provided at least on the surface portion of the partition member, and a plurality of types of rubber are radially provided around the shaft member. When alternately arranged in the arrangement mode of the above, each rubber material protruding from a predetermined cavity around the shaft member where adjacent different types of rubbers are located closest to each other is inserted into a rubber retaining groove. Into the groove, in other words, the space between the rubbers, which is divided by the partition members, and is a mere rubber reservoir completely independent from the anti-vibration function part made of each type of rubber. By forming the above, it is possible to sufficiently prevent the mixing of different types of rubber in the vibration isolating function unit, and thereby, the variation in rubber physical properties caused by the mixing of different types of rubber in the vibration isolating function unit, Between rubber Possibility of occurrence of separation can be effectively rid of.

  This can be made more reliable by providing rubber reservoir grooves on both surface portions of the partition member on the shaft member side and the cylindrical member side, and forming rubber reservoirs on both of these member sides. .

Also, here, when setting the partition member at the corner of the shaft member whose out-of-plane contour shape is a polygonal shape, the setting position accuracy of the partition member should be increased, and the rubber should be partitioned with the expected accuracy. Can do. In other words, compared to the case where the out-of-plane contour shape is a curved shape, the separation and separation of different types of rubber disposed on adjacent side portions can be made easier and more reliable, and different types of rubber may be mixed with each other. Can be removed more sufficiently, and the surplus rubber can be made to flow smoothly and surely into the rubber reservoir groove that is normally arranged at the corner.
The same applies to the case where the partition member is set at the corner of the outer cylinder member whose in-plane contour shape forms a polygonal shape.

  By the way, when the partition member is set at the corners of both the shaft member and the outer cylinder member, it is possible to separate the adjacent rubbers with higher accuracy regardless of whether the partition member side or the outer cylinder member side. it can.

  FIG. 1 is a perspective view and a plan view illustrating a cylindrical vibration-proof mount manufactured by a manufacturing mold according to the present invention. The cylindrical vibration-proof mount 1 has, for example, a quadrangular outer contour shape. A shaft member 2 that can be spaced from and surrounds the shaft member 2 at intervals, for example, an outer cylinder member 3 as a cylindrical member that is coaxial with the shaft member 2, and both the members 2 and 3, The rubber material 4 is interconnected by vulcanization adhesion or the like, and the rubber material 4 is a plurality of types arranged around the shaft member 2, and the cylindrical portion of the outer cylinder member 3 configured in a cylindrical shape in the figure. 3a is formed by two kinds of different types of rubbers 4a and 4b arranged in a radial arrangement at four positions opposed to the diameter direction corresponding to the flat surface of the shaft member 2.

In this case, the two kinds of different types of rubbers 4 a and 4 b are completely separated from each other by the space 5 penetrating the entire rubber material 4 around the shaft member 2.
Note that the space 5 here is formed by a partition member that will be described in detail later. In addition, at least the surface of the space 5 on the shaft member side, in the drawing, each of the shaft member 2 and the outer cylinder member 3. On the surface, rubber reservoirs 6a and 6b made of a rubber material that protrudes from the cavity and flows into the rubber reservoir groove of the partition member and hardens are formed in an extending state in the axial direction thereof. .

  Further, in the vibration isolating mount 1 shown in the drawing, the shaft member 2 has a flange 2a having a circular contour shape at the lower end as one end thereof, and a through hole 2b in the central portion of the columnar portion. The vibration mount 1 is fastened and fixed to a cabin or body of an automobile body by, for example, a bolt inserted vertically through the through hole 2b.

  On the other hand, the outer cylinder member 3 has flanges 3b having a deformed contour shape such as a substantially oval shape or a substantially oval shape at the lower end of the cylinder portion 3a, and at both ends on the long axis side of the flange 3b, It has a through hole 3c for attachment.

  The cylindrical anti-vibration mount 1 as described above is applied to an automobile as a body mount, a cab mount or the like in a vertical posture thereof, and mainly compression and tensile deformation of any one pair, for example, a pair of rubbers 4a. In addition, the anti-vibration and damping function of the left-right vibration of the vehicle is exhibited, and the anti-vibration and damping function of the longitudinal vibration of the vehicle is exhibited by the compression and tensile deformation of the other pair of rubbers 4b. With respect to the vibration in the vertical direction of the vehicle, in addition to the compression and tensile deformation of the portions between the flanges 2a and 3b of the respective rubbers 4a and 4b, the columnar portions of the shaft member 2 of the rubbers 4a and 4b Based on the shear deformation of the portion between the outer cylindrical member 3 and the cylindrical portion 3a, the vibration-proofing and damping functions can be exhibited.

  By the way, manufacture of such a cylindrical vibration-proof mount, that is, based on vulcanization adhesion by two kinds of different kinds of rubbers 4a and 4b as the rubber material 4 of the shaft member 2 and the outer cylinder member 3 manufactured in advance. The interconnection can be performed by using a manufacturing mold as shown in FIG.

  Here, FIG. 2A is a cross-sectional view of a mold corresponding to a longitudinal section along a line aa passing through a pair of spaces 5 facing each other in the plan view of the product mount (FIG. 1B). FIG. 2 (b) is a mold sectional view corresponding to a longitudinal section along the line bb passing through the long axis of the flange 3b in the plan view of the product mount, and FIG. 2 (c) is a sectional view of FIG. It is a cross-sectional view which follows the cc line | wire of ().

2A, in addition to the lower mold 21 and the upper mold 22, the shaft member 2 is seated on the lower mold 21 by a flange 2a provided at one end thereof. The flange 2a is positioned and held on the lower mold, and a plurality of segment-shaped middle mold lower step portions 23 and the outer cylindrical member 3, particularly the flange 3b thereof, are positioned and supported in a surface contact state with the lower step portion 23. A three-stage structure comprising a middle mold middle stage portion 24 and an upper mold 22 that holds the other end of the shaft member 2 and fits inside the outer cylinder member 3 to come into surface contact with the middle mold middle stage portion 24 and also serves as an upper stage portion. A partition member 25 having a divided structure is provided, and a restraining member (medium upper stage part) 26 that is interposed between the upper die 22 and the middle part 24 and presses the outer cylinder member 3 onto the middle part 24 is provided. I will.
In addition, the above structures are the same also about the metal mold | die cross section corresponding to the vertical cross section along the line segment orthogonal to the aa line of FIG.1 (b).

  2B, in addition to the lower mold 21 and the upper mold 22, the mold supports the flange 3b of the outer cylindrical member 3, and between the flange 3b and the shaft member flange 2a. The cavity member 28 contributing to the section of the cavity 27 is provided, and the same restraining member 26 as described above is provided.

In this figure, the cavity 27 defined between the flanges 2 a and 3 b is communicated between the columnar portion of the shaft member 2 and the cylindrical portion 3 a of the outer cylindrical member 3 by the cavity member 28. The upper die 22 is closed between the two.
The same applies to the die cross section corresponding to the vertical cross section along the line segment orthogonal to the line bb in FIG.

  2A, each partition member 25 disposed between the four cavities 27 formed around the shaft member 2 and directly configures the partition member 25. The middle mold lower step portion 23, the middle mold middle step portion 24, and the upper mold portion are each positioned and arranged at each corner of the columnar portion of the shaft member 2 having a quadrangular shape outside the plane. The shaft member 2 side surface portion and the outer cylinder member 3 side surface portion extend in the axial direction of the members 2, 3, respectively. Rubber retaining grooves 29 and 30 having a length over almost the entire length of the cylindrical portion 3a of the cylindrical member 3 are provided.

  Here, the rubber retaining grooves 29 and 30 are formed from the cavities 27 when vulcanized and molded by injecting different kinds of rubber materials into the cavities 27 adjacent to each other with the partition member 25 therebetween. By letting out the rubber material into the rubber retaining grooves 29 and 30 and curing them, the rubber material functions to effectively prevent mixing of different types of rubber in the product mount.

  Further, here, the shaft member 2 and the outer cylinder made of a press-formed product are formed by using the partition member 25 as a divided structure so that the rubber member supplied into the adjacent cavity 27 is more reliably divided by the partition member 25. The liquid sealing of the curved surface portions of the projecting bases of the flanges 2a and 3b of the member 3 is realized by the middle lower part 23 and the middle middle part 24 which are separate from each other. The angle of intersection with the flange 2a is preferably as close to 90 ° as possible in order to ensure the liquid sealing by the middle lower stage portion 23, and the inner surface of the cylindrical portion 3a of the outer cylindrical member 3 and the flange 3b. The angle of intersection with the lower surface of the medium is also preferably as close to 90 ° as possible in order to make the liquid sealing by the middle-sized middle portion 24 more reliable.

  In manufacturing the cylindrical vibration-proof mount using the manufacturing mold having the above-described structure, the shaft member 2 and the outer cylinder member 3 are respectively disposed between the lower mold 21 and the upper mold 22 as shown in FIG. In the state where the partition member 25 is also arranged as described above, through the injection passage as conceptually illustrated in the plan view and the side view in FIG. With respect to two opposing cavities 27, one kind of rubber material 34 is injected from one sprue 31 through a runner 32 and a gate 33, and against the other two cavities 27 to be opposed. Then, the other type of rubber material 38 is injected from the other sprue 35 through the runner 36 and the gate 37.

  In such injection molding of the respective rubber materials 34 and 38 into the respective cavities 27, the rubber material that protrudes from the cavities 27 is contained in the rubber retaining grooves 29 and 30 of the partition member 25 as described above. The rubber materials 34 and 38 in the cavity 27 are vulcanized and cured there, and the shaft member 2 and the outer cylinder member 3 are interconnected by vulcanization adhesion.

  The cylindrical anti-vibration mount 1 manufactured as described above includes, for example, the upper mold 22 that is moved upwardly from the mold closing position shown in FIG. 2 to the mold opening position, and then the vibration isolating mount 1 is moved to the middle lower stage. Take out from the lower mold 21 together with the portion 23, the middle mold middle portion 24 and the restraining member 26, and then remove the lower portion 23 and the cavity member 28 from the columnar portion of the shaft member 2 as shown in FIG. In addition to extracting radially outward, the restraining member 26 is also extracted radially outward, and the intermediate portion 24 is moved downwardly toward the flange 2a side of the shaft member 2 so that the shaft of the intermediate portion 24 is removed. In the state where the entry between the member 2 and the outer cylinder member 3 is completely released, each middle stage portion 24 is extracted outward in the radial direction, whereby an independent anti-vibration mount as shown in FIG. 1 is obtained. .

Thus, here, it is possible to effectively prevent the mixing of different types of rubber disposed around the shaft member 2 under the action of the partition member 25 and the rubber reservoir grooves 29 and 30 provided thereon. In addition, by making the outer contour shape of the cross section of the shaft member 2 a polygonal shape, it is possible to secure a sufficiently large adhesion area between the shaft member 2 and the rubber and to bring about a required adhesion strength.
Further, by allowing the mold itself to function as the partition member 25, it is possible to manufacture a vibration isolating mount made of two or more types of different rubbers without the need to add a new member.

It is the perspective view and top view which illustrate the cylindrical vibration proof mount manufactured with the metal mold | die which concerns on this invention. It is sectional drawing which shows embodiment of this invention. It is a figure which shows an injection path notionally.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical vibration-proof mount 2 Shaft member 2a Flange 2b Through-hole 3 Outer cylinder member 3a Tube part 3b Flange 3c Through-hole 4 Rubber material 4a, 4b Rubber 5 Space 6a, 6b Rubber pool 21 Lower mold 22 Upper mold 23 Middle lower stage part 24 Middle size middle portion 25 Partition member 26 Restraint member (Middle size upper portion)
27 Cavity 28 Cavity member 29, 30 Rubber pool groove 31, 35 Sprue 32, 36 Runner 33, 37 Gate

Claims (4)

The shaft member and the cylindrical member surrounding the shaft member with a space therebetween are interconnected by a rubber material, and the rubber material is formed of a plurality of types of rubber disposed around the shaft member. A manufacturing mold for a cylindrical vibration-proof mount,
A partition member that is disposed between the shaft member and the tubular member and separates different types of rubber is provided, and at least a surface portion of the partition member on the shaft member side extends in the axial direction of the shaft member. Manufacturing mold for cylindrical anti-vibration mounts provided with a ditch groove.   2. The cylindrical vibration isolation device according to claim 1, wherein a rubber retaining groove extending in the axial direction of each of the members is provided on each of the surface portion on the shaft member side and the surface portion on the tubular member side of the partition member. Manufacturing mold for mounting.   3. A mold for manufacturing a cylindrical anti-vibration mount according to claim 1, wherein the partition member is set at a corner portion of a shaft member having an out-of-plane contour shape forming a polygonal shape.   The manufacturing die for a cylindrical vibration-proof mount according to any one of claims 1 to 3, wherein the partition member is set at a corner of a cylindrical member whose in-plane contour shape forms a polygonal shape.

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