JP4111627B2 - gasket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gasket used for sealing electronic devices, hard disk devices (hereinafter referred to as HDDs), vacuum devices, pipe joints, joints of various machines, underwater glasses, building openings, and the like, and a method of manufacturing the same. .
[0002]
[Prior art]
Conventional gaskets of this type, for example, HDD gaskets, include those in which a polymer elastic material is simply molded and vulcanized in an annular shape, or rubber that is bonded to the surface of a thin metal plate.
[0003]
[Problems to be solved by the invention]
However, since the product molded and vulcanized in an annular shape is an extremely narrow and thin product because of its use, it is difficult to accurately obtain its shape and size in terms of manufacturing technology.
[0004]
Further, since the shape is hard to be determined like a rubber band, it is not easy to assemble the HDD using this.
[0005]
Furthermore, since the shape is hard to be determined like a rubber band, it takes time to arrange the HDD before assembling work and handle it at the time of packaging.
[0006]
On the other hand, what bonded rubber | gum to the surface of a metal thin plate has many manufacturing processes and is complicated, Therefore A cost becomes high.
[0007]
The present invention has been made paying attention to such conventional problems, and can retain the necessary shape and dimensions, and therefore can be easily handled during use, storage, and packaging, and An object is to provide an easy-to-manufacture gasket and a method for manufacturing the gasket.
[0008]
[Means for Solving the Problems]
A gasket provided by the present invention is an annular gasket that presses and clamps between a first member and a second member to seal between the two members, an annular gasket body made of a polymer elastic material, and an inner circumference thereof And a resin layer which is laminated on the surface and / or the outer peripheral surface and holds the gasket body so as not to be deformed.
[0009]
The first member and / or the second member can be provided with a ridge that directly presses the gasket body when the gasket is pressed and held.
[0010]
The gasket manufacturing method provided by the present invention includes the following steps (1) to (3).
[0011]
(1) A step of making a cylindrical body having the same cross-sectional shape as the planar shape of the gasket body set in advance with a polymer elastic material.
[0012]
(2) A step of laminating a resin layer that holds the gasket body so as not to be deformed on an inner peripheral surface and / or an outer peripheral surface of the cylindrical body to form a resin laminated cylindrical body.
[0013]
(3) A step of rounding the resin laminated cylinder.
[0014]
[Action]
The annular gasket body of the present invention is soft and difficult to determine in shape as it is, but the above-described resin layer is formed on the inner peripheral surface and / or outer peripheral surface thereof, so that it is maintained in a preset shape and size. Can do.
[0015]
For this reason, arrangement, storage, and handling during packaging are facilitated. Further, when the gasket is pressed and held between the first member and the second member, the resin layer may be removed immediately before that, and therefore, the operation using the gasket becomes easy.
[0016]
In particular, when a protrusion that presses the gasket body is provided on at least one of the first member and the second member, it is not necessary to remove the hard resin layer, so that the operation using the gasket is even easier. become.
[0017]
In addition, the gasket manufacturing method of the present invention produces a cylindrical body of a polymer elastic material that is not easily deformed, and forms a resin layer on the inner peripheral surface and / or the outer peripheral surface thereof to form a cylindrical body that is not easily deformed, and then cut the ring. Therefore, the shape and dimensions of the cylindrical body portion, that is, the gasket main body portion can be accurately maintained, the gasket can be easily manufactured, and the manufacturing cost is low.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described by way of examples.
[0019]
FIG. 1 is a plan view of the HDD gasket G of the embodiment. In the figure, reference numeral 1 denotes a gasket body, which has a shape corresponding to the shape of the HDD. Reference numerals 2 and 3 denote hard resin layers laminated on the inner and outer peripheral surfaces of the gasket body 1.
[0020]
The gasket body 1 is made of butyl rubber. In addition to this, a high-molecular elastic material such as acrylic rubber, ethylene propylene rubber, and fluorine rubber can be used for the gasket body 1.
[0021]
The hard resin layers 2 and 3 are formed of an epochine resin. In addition to the resin layers 2 and 3, thermosetting resins such as unsaturated polyester resins, polyurethane resins, and silicone resins, and photocurable resins can be used.
[0022]
Note that only one of the hard resin layers 2 and 3 may be provided.
[0023]
The gasket G of the example was manufactured in the following manner.
[0024]
(1) The cylindrical body 11 shown in FIG. 2 having the same cross-sectional shape as the planar shape of the gasket main body 1 shown in FIG. 1 was molded from butyl rubber.
[0025]
(2) The obtained cylindrical body 11 is immersed in an epoxy resin liquid (molecular weight 360, viscosity 90 to 110) to which polyamine is added as a curing agent, pulled up, heated at 150 ° C. for 30 minutes, and shown in FIG. A resin laminated cylinder 12 was made.
[0026]
(3) Next, the obtained resin laminate 12 was cut into a thickness of 0.8 mm as shown in FIG. 3 to obtain a gasket G having the configuration shown in FIG.
[0027]
Since the gasket body 1 in the gasket G of the embodiment is held by the hard resin layers 2 and 3 so as not to be deformed, the shape and dimensions set when the cylindrical body 11 is formed can be held as they are. For this reason, arrangement, storage, and handling during packaging are facilitated.
[0028]
For the same reason, when an HDD is assembled, it is easy to handle, and the assembling work becomes easy. That is, it can be easily assembled by the following procedure.
[0029]
(1) Place it accurately at a predetermined position on the lower case of the HDD.
[0030]
(2) After placing, the hard resin layers 2 and 3 are removed, and the upper case is placed thereon.
[0031]
(3) Hold the upper and lower cases together and tighten them with screws to integrate both cases.
[0032]
In this case, the assembly work is further facilitated by providing at least one of the upper and lower cases with a protrusion that contacts the gasket body 1. This is because the gasket body 1 is pressed and compressed by the ridges, and it is not necessary to remove the hard resin layers 2 and 3.
[0033]
In the gasket manufacturing method of the embodiment, a cylindrical body 11 of butyl rubber which is not easily deformed is manufactured, and this is immersed in an epoxy resin liquid, and the attached resin is thermally cured so as not to be deformed. It is easy to make and does not cost much.
[0034]
The gasket G of the said Example is a thing of the uniform thickness obtained by cutting the resin laminated body 12 into a thickness of 0.8 mm. However, it is not limited to this. For example, the gasket G ₁ which is formed by cutting a ring at an oblique cut surface with respect to the center line of the laminate 12 and gradually increasing in thickness from one end to the other end in the radial direction as shown in FIG. Can be mentioned.
[0035]
In the case of the gasket G _{1 having} such a shape, when the upper and lower cases are tightened, the pressing force at that time is increased in the thickness direction, and the pressing force per unit area can be increased. For this reason, the elastic deformation of the gasket G ₁ becomes possible with a relatively small pressing force.
[0036]
In the above embodiment, the HDD gasket has been described as an example. However, gaskets suitable for other applications can be similarly described.
[0037]
For example, the gasket of the present invention can be used for sealing between a frame and glass of an opening of a building, between a frame and glass of underwater glasses, and between a frame and glass of an opening of an underwater house. . Also, it can be used as a sealing material for making electronic equipment, vacuum equipment, pipe joints and the like into a sealing structure.
[0038]
【The invention's effect】
As described above, according to the gasket of the present invention, since it is configured as described above, handling during use, storage, and packaging is facilitated.
[0039]
Further, according to the gasket manufacturing method of the present invention, since it can be manufactured as described above, it is easy to manufacture and the manufacturing cost is low.
[Brief description of the drawings]
FIG. 1 is a plan view of a gasket according to an embodiment. FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a plan view of a cylindrical body made of butyl rubber obtained in the manufacturing process of the gasket of the embodiment. FIG. 5 is a side view showing the resin laminated cylinder obtained in the manufacturing process of the gasket of the embodiment and how to cut the ring. FIG. 5 is a view corresponding to FIG. 2 showing another embodiment of the gasket of the embodiment.
G, G ₁ Gasket 1 Gasket body 2, 3 Hard resin layer 11 Tubular body 12 Resin laminate

Claims (3)

An annular gasket that is pressed and held between the first member and the second member to seal between the two members, and is laminated on the inner peripheral surface and / or outer peripheral surface of the annular gasket body made of a polymer elastic material. A gasket comprising a resin layer that holds the gasket body so as not to be deformed. 2. The gasket according to claim 1, wherein the first member and / or the second member includes a protrusion that directly presses the gasket body when the gasket is pressed and held. The manufacturing method of the gasket which has the process of following (1)-(3). (1) A step of making a cylindrical body having the same cross-sectional shape as the planar shape of the gasket body set in advance with a polymer elastic material.
(2) A step of laminating a resin layer that holds the gasket body so as not to be deformed on an inner peripheral surface and / or an outer peripheral surface of the cylindrical body to produce a resin laminated cylindrical body.
(3) A step of rounding the resin laminated cylinder.

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