Method for producing molded gasket
A manufacturing method and technology of molded products, applied in its manufacturing field, can solve problems such as low yield and high cost, and achieve the effect of protecting from foreign matter adhesion or contamination
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[0087] Next, the embodiment of the present invention will be described according to the drawings.
[0088] Each of the examples shown below is intended to produce a GDL integral seal as a gasket molded product, that is, a component part for a fuel cell. This GDL integrated seal has a structure in which an MPL layer (microporous layer) 12 as a surface treatment layer is provided on one surface 11a in the thickness direction of a GDL (gas diffusion layer) 11 formed of a porous structure as a substrate. , and at the same time, on the other surface 11b in the thickness direction, a pad main body 13 formed of a rubber-like elastic body is integrally formed. As the name suggests, the MPL layer 12 is formed of a porous structure with a lower porosity than GDL11, and is covered in the thickness direction of GDL11 for the purpose of water management in the fuel cell element, etc. The entire surface of one side 11a. In addition, the gasket main body 13 is provided in a ring shape on t...
no. 1 example
[0090] In the first embodiment, the first process is as follows figure 1 (A) As shown in (B), the protrusion-shaped leg portion 17 formed of a rubber-like elastic body is integrally molded at the position corresponding to the burr portion 16 in the molded product, and the second step is as follows: figure 2 As shown, the molded product is brought into contact with the placing table 31 with the legs 17, and the molded product is supported by the legs 17. In the third step, as shown in figure 1 (A) As indicated by the dotted line C in (B), the leg portion 17 is cut off from the product portion 15 as a part of the burr portion 16 . In the first process, the legs 17 are integrally formed on the other surface 11b in the thickness direction of the GDL 11 similarly to the liner body 13, integrally formed on the outer peripheral side of the liner body 13, and four of the GDL 11 that form a planar rectangle Each of the sides is integrally formed at one place as a member having a pr...
no. 2 example
[0092] In this second embodiment, during the first process, such as Figure 4 (A) As shown in (B), the protrusion-shaped leg portion 17 formed of a rubber-like elastic body is integrally molded at the position corresponding to the burr portion 16 in the molded product, and the second step is as follows: Figure 5 As shown, the legs use the legs 17 to bring the molded product into contact with the placing table 31, and the molded product is supported by the legs 17. In the third process, it is shown as Figure 4 (A) As indicated by the dotted line C in (B), the leg portion 17 is cut off from the product portion 15 as a part of the burr portion 16 . In the first step, the legs 17 are integrally formed on the thickness direction surface 11a (on the MPL layer 12) of the GDL 11 provided with the MPL layer 12 opposite to the liner body 13, integrally formed on the outer peripheral side of the liner body 13, and Each of the four sides of the GDL 11 forming a planar rectangle is inte...
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Abstract
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