JPS6131443A - Elastic material having cushioning characteristic and its preparation - Google Patents

Abstract

PURPOSE:To obtain an elastic material having improved cushioning functions such as increase in rigidity, dispersibility of load stress, supply of uniform vibration-absorbing characteristics, etc., by embedding a cushioning material obtained by entangling a great number of aluminum wires in an organic elastic material. CONSTITUTION:Complicatedly entangled aluminum wires (e.g., Al or alloy of Al and Si, Mg, Cu, etc) is brought into contact with a chemically treating solution containing potassium and fluorine, to form preferably 0.1-10g/m<2> potassium pentafluoroaluminate film, then heated, and contact or neighboring parts are soldered with a soldering material to give a cushioning material, which is embedded in an organic elastic material (e.g., natural rubber, butadiene styrene rubber, etc.) having 10-1,000kg/cm<2> modulus of elasticity.

Description

[Detailed Description of the Invention] (Industrial Field of Application) (Prior Art) Butadiene styrene rubber and urethane rubber nanoorganic elastomers have been commonly used for shock mitigation and vibration suppression. .

(Problem to be Solved by the Invention) However, since these organic elastic bodies have high elasticity, when they are deformed in tension, compression, or bending, they release the energy generated by the deformation all at once, resulting in rapid Trying to return to its original shape. Further, when this type of elastic body is used as a vibration absorbing material, it often resonates with the vibrating body depending on the frequency of vibration, and the vibration suppressing effect is insufficient. Furthermore, when a load is locally applied to the elastic body, only that portion deforms, so that local breakage is likely to occur due to impact.

Therefore, since conventional elastic bodies lack a buffering function as described above, they are not fully suitable for applications and usage conditions in which such a cushioning function is strongly required.

An object of the present invention is to provide an elastic body that does not have the above-mentioned drawbacks and has excellent cushioning properties.

(Means for Solving the Problems) The elastic body having cushioning properties of the present invention is characterized in that a cushioning material made of a large number of aluminum-based wires entangled is embedded in an organic elastic body such as synthetic rubber. and its manufacturing method.

That is, in the present invention, aluminum-based wire rods having some rigidity are entwined and embedded in a flexible organic elastic body, thereby greatly acting as a buffer against shocks and vibrations. In the elastic body of the present invention, it is more preferable to braze the parts where the intricately entangled aluminum wires come into contact with or come close to each other, since this increases the machinability of the cushioning material and further improves the cushioning performance against shock and vibration.

The present invention will be further explained. As a typical example of the elastic body of the present invention is shown in FIG. It is preferable that the organic elastic body 3 is embedded uniformly throughout.

Therefore, the rigidity of the elastic body as a whole increases considerably, and as a result, the elasticity is significantly weakened compared to that of the organic elastic body 3, and the force that attempts to return it to its original shape no longer acts.
The energy generated by deformation is slowly released.

In addition, since it is a composite of two types of materials with different vibration characteristics,
It becomes difficult to resonate with the vibrating body. Furthermore, since the aluminum wire rods 1... exist entangled within the elastic body, even if a load is applied, the load stress is transmitted through the aluminum wire rods 1... and dispersed. .

The cushioning material 2 may be buried in any position, and the cushioning material 2 may be buried in layers on both sides of the organic elastic body 3 as shown in FIG. 2, or in layers as shown in FIG. is buried in a layer only in the center of the elastic body 3 to prevent stuttering. When it is desired to avoid exposure of the cushioning material, it is convenient to use the arrangement as shown in FIG.

Preferably, as shown in an enlarged view in FIG.
It is an elastic body made by brazing and joining the parts that are in contact with or close to each other. By forming the brazing parts 4, the rigidity of the cushioning material 2 is further increased, the restoring force acting as an elastic body becomes gentler, and the load stress is distributed more smoothly.

The cushioning material 2 used in the present invention is an aluminum wire material 1...
It may be any material as long as it has the characteristics of being entangled with each other, being easily deformed, and having considerable elasticity, but returning slowly to its original state after deformation. Aluminum wire rod 1.
. . are bent at various angles and have no directionality and are intricately intertwined. The aluminum wire 1 herein refers to a thin wire or thick fiber made of aluminum or aluminum alloy. Aluminum alloy materials include aluminum (=lam), silicon (St), and magnesium (M
g) S steel (Cu), manganese (Mn), zinc (Zn)
, tita/(Ti), chromium (Cr), di/l/conium (Zr), and the like. The diameter of the aluminum wire 1 is arbitrary, and may be adjusted as appropriate in consideration of the thickness, size, etc. of the elastic body of the present invention as a product. For example, if the elastic body is 100-X 10
0. When the wire rod has a dimension of approximately X 10.1, it is preferable to use a wire rod 1 having a diameter of α2 to 1.0III.

The length of the wire 1 may be arbitrary, and it may be a long wire exceeding s 10cli or a short wire with several flaws. Further, it is preferable to adjust the packing density of the wire rod 1 in the elastic body as appropriate so that the elastic body has desired rigidity, elasticity, etc.

The organic elastic body 3 used in the present invention is a polymeric elastic body with high elasticity, and for example, conventionally used natural rubber or various tough synthetic rubbers can be used. Specific examples include butadiene styrene rubber, butadiene acrylonitrile rubber, polychloroprene, butyl rubber, urethane rubber, and the like. The elastic body 3 has an elastic modulus of 1
Appropriately, it is about 0 to 1000 kpz.

Now, as described in Japanese Patent Application No. 58-191311, the present inventors have developed a new method for brazing aluminum-based materials, specifically, using a chemical conversion treatment solution containing potassium and fluorine. Potassium pentafluoroaluminate (K) as a flux is applied to the surface of aluminum-based materials.
! We have proposed a method in which a film consisting of AJFg) is formed and then heated and brazed. According to this method, a flux layer can be easily formed simply by contacting an aluminum material with a chemical conversion treatment solution, and furthermore, In brazing, the flow of the filler metal during the process is smooth, and the filler metal spreads evenly over the brazing parts. As a result, with a small amount of brazing filler metal,
The braze can form a defect-free joint, and the braze does not corrode the joint without cleaning the braze after the braze.

Therefore, using the above method, specifically, as shown in FIG.
... is brought into contact with a chemical conversion treatment solution containing potassium and fluorine to form a potassium pentafluoroaluminate film on the surface of the wire rod 1, and then, for example, the brazing material 5 of aluminum-silicon alloy short fibers is applied to the wire rod 1. . . , and then heated to braze the sialuminium-based wire 1 . When the elastic body of the present invention is manufactured by filling the internal void of the buffer moon 2 with the organic elastic body 3,
Since the wire rods 1 are brazed to each other smoothly, the elastic body of the present invention of the wire rod brazing type can be manufactured easily and efficiently. Since corrosion does not occur in the brazed parts after fabrication, it is possible to obtain an elastic body with high durability.

The chemical conversion solution used in this production method is prepared by the following method. One method is to dissolve potassium hydrogen fluoride (KHF*) in water. The amount of potassium hydrogen fluoride dissolved in 11 ml to sag of water is suitable for producing potassium pentafluoroaluminate. As another preparation method, potassium fluoride (KF) and hydrogen fluoride (HF) may be dissolved in water to form a mixed aqueous solution. In addition, potassium hydroxide (KOH
) and hydrogen fluoride dissolved in water may also be used. These aqueous solutions preferably have a molar ratio of fluorine to potassium of 1 to 10 and contain potassium of 5 to 4077 cL/ll.

As a method of bringing the aluminum-based wire 1 into contact with the chemical conversion treatment solution, there is a method of immersing the aluminum-based wire 1 which is intricately bent, curved and intertwined in the chemical conversion treatment solution, There is a method of applying or spraying a treatment liquid onto the aluminum-based wire material 1 which is intricately intertwined. The contact time in this case is not necessarily determined depending on the concentration of potassium and fluorine in the chemical conversion treatment solution, the temperature of the treatment solution, etc., but is preferably in the range of about 5 seconds to 20 seconds, for example. This contact destroys the oxide film present on the surface of the aluminum-based wire 1, causing a chemical reaction between aluminum, potassium, and fluorine, and producing potassium pentafluoroaluminate. The production of this compound is promoted by heating the chemical conversion treatment solution. As a result, a potassium pentafluoroaluminate film is firmly formed on the surface of the aluminum wire. Potassium pentafluoroaluminate is on the surface of the wire rod 10 (N~1011/v?
Once this is done, subsequent brazing is desirable as the potassium pentafluoroaluminate acts as a 7 lux agent in the process. After that, the chemical conversion treated wire rod is placed in a heating furnace, etc., and is heated to a brazing filler metal (usually i-7 to 12%S).
i alloy), it can be easily brazed. The brazing material may be clad in advance on the surface of the wire, or the linear brazing material may be mixed with the aluminum wire.

The heating temperature in the brazing process is preferably below the melting point of the aluminum wire 1 and above 560°C, which is the melting point of the brazing material and potassium pentafluoroaluminate, and the heating atmosphere is a non-oxidizing atmosphere. Most preferably, an atmosphere containing a small amount of oxygen may be used.

In addition, methods for embedding the brazed cushioning material 2 in the organic elastic body 3 include a method in which the molten organic elastic body 3 is injected into the cushioning material 2 and then cooled, and a method in which the raw material of the elastic body 3 (unvulcanized rubber Examples include a method in which the cushioning material 2 is filled with sulfur (sulfur, etc.), a chemical reaction is caused by heating to generate the elastic body 3, and the elastic body 3 is then cooled.

(Example) The present invention will be explained in detail below.

Aluminum-α5 magnesium alloy thin wire (diameter α2~
Aluminum wire rods with a length of 1.0 cm and a length of 5 to 30 cIL are bent and curved to form a tangled layered material (100 m x 10011 x 15 NN) as shown in Figure 5.
), and then this layered material is brought into contact with a chemical conversion treatment solution containing potassium and fluorine (concentration and preparation according to the above description) by immersion or the like to form a potassium pentafluoroaluminate film on the surface of the aluminum wire. Next, short fibers of AJ-12Si alloy (diameter: α5M2% length: 10-20B) are supplied into the layered material of the chemical conversion treated wire, and then placed in a heating furnace at 610
Heat it at ℃ for 10 minutes to perform brazing, then remove it from the furnace and let it cool. As a result, a layered cushioning material brazed at various locations as shown in FIG. 4 was obtained. Thereafter, this cushioning material was placed in a suitable mold, and unvulcanized rubber, which is a raw material for organic elastic material, and sulfur in an amount of about 10 parts by weight based on this rubber were placed in the mold, and heated to 150°C to form an organic material. As shown in Figure 1, the elastic body is a full-layer type with a volume ratio of the cushioning material and the organic elastic body (hereinafter simply referred to as volume ratio) of 7:3.
An elastic body of Example 1 was manufactured.

In addition, using the same manufacturing method as above, both are full-layer types (
(Fig. 1), and the diameter of the aluminum wire is α2 I
The elastic body of Example 2 with a volume ratio of 5 = 5 in L5IIE, the elastic body of Example 3 with a volume ratio of 5 = 5, the wire diameter of r The elastic body of Example 4 and the elastic body of Example 5 in which the diameter of the wire rod was 1.0111 and the volume ratio was 3 nia were manufactured.

Furthermore, by using a manufacturing method similar to that described above, two cushioning materials made of the same aluminum wire rod and having a layer thickness of 511 Il were buried on both sides of the organic elastic body, creating a two-layered upper and lower type as shown in Figure 2. Elastic bodies of Examples 6 to 8 (Example 1
(same dimensions, same material). Example 6 has a wire rod diameter of α2 mm and a volume ratio of 5.5, Example 7 has a wire rod diameter of 0.2 and a volume ratio of 6:4, and Example 8 has a wire rod diameter of 0.2 mm and a volume ratio of 6:4. The diameter is (15 mm) and the volume ratio is 5=5.The volume ratio here indicates the proportion in the layered portion.

Further, by using a manufacturing method similar to that described above, a cushioning material made of the same aluminum wire rod and having a layer thickness of 8 mm was buried in the center of the organic elastic body to produce a central single-layer type Example 9 as shown in FIG. and Example 100 elastic bodies (same dimensions and same material as Example 1) were manufactured. In both Examples, the volume ratio in the layered portion is 5=5, and in Example 9, the diameter of the wire is IIL51! W! In Example 10, the diameter is o, s I
lm. For comparison, an organic elastic body of the same quality as that in Example (same size as the elastic body of Example 1) was prepared.

In order to find out the buffering performance of the elastic bodies of each example, a steel ball rebound test was conducted to serve as a guideline. In this test, the elastic body of the example or comparative example was placed on a surface plate, and the
A steel ball of cIL is allowed to fall freely from a height of 1WL above the elastic body, and the rebound height of the steel ball is measured using the button, and the ratio of the rebound height in each example to that in the comparative example is calculated. Calculated. The results are shown in Table 1 below.

From this table, it can be seen that the elastic bodies of the examples all have excellent cushioning performance.

(Effects of the Invention) As explained above, the elastic body with cushioning properties of the present invention has increased rigidity by embedding aluminum wire rods, and on the other hand, its elasticity weakens and the energy generated by deformation is gradually released. As a result, the restoring action that attempts to return it to its original shape becomes slower. In addition, by using a composite structure of an organic polymer and a metal wire to make it difficult to resonate with the vibrating body, it has uniform vibration absorption characteristics and can effectively absorb vibrations. Furthermore, by embedding the entangled wire rods so that the load stress is dispersed, local deformation or destruction is less likely to occur even if a local impact or load is applied. Therefore, since it has an excellent buffering function as described above, it is extremely useful as a shock absorbing member, a vibration suppressing member, etc.

[Brief explanation of the drawing]

j1!1 to 3 are cross-sectional views showing the elastic body of each typical example of the present invention, FIG. 4 is an enlarged view showing the inside of the elastic body of another typical example of the present invention, and FIG. FIG. 3 is an enlarged view showing a state in which the elastic body shown in the figure is in the middle of being manufactured. In the figure, 1... Aluminum wire rod 2... Cushioning material 3... Organic elastic body 4... Brazing part 5... Brazing metal (1 other person) Figure 1 5 - Brazing metal Figure 2 and Figure 3

Claims (3)

[Claims] (1) An elastic body having a cushioning property characterized by embedding a cushioning material made of a large number of entangled aluminum wires in an organic elastic body such as synthetic rubber. (2) The cushioning material is made of aluminum wire rods intertwined in a complicated manner, and the portions where the wire rods touch or come close to each other are brazed. Elastic body. (3) A chemical conversion treatment solution containing potassium and fluorine is brought into contact with the intricately intertwined aluminum wire to form a potassium pentafluoroaluminate film on the surface of the wire, and then heated and brazed with the aluminum wire. 1. A method for manufacturing an elastic body having cushioning properties, which comprises brazing the two together to form a cushioning material, and embedding the cushioning material in an organic elastic body such as rubber.