JP6478377B2 - Storage tray - Google Patents

Description

  The present invention relates to a storage tray for storing and transporting parts.

Conventionally, in the storage, transportation and shipment of finished products such as electronic parts, dedicated trays have been used so as not to damage the surface of the electronic parts such as scratches (for example, , See Patent Documents 1 to 3).
In recent years, not only electronic parts but also machined metal parts have increased in number of ultra-precision metal parts that require extremely delicate handling due to the use of ultra-precision parts as the final product becomes smaller. Yes. There is a need for a storage tray for storing and transporting such ultra-precision metal parts.

Japanese Utility Model Publication No. 05-84680 Japanese Utility Model Publication No. 05-00683 Registered Utility Model No. 3055609

By the way, in the prior art currently disclosed by patent documents 1-3, the function required for the storage tray for storing and conveying a superprecision metal component etc. is not fully provided.
For example, the tray disclosed in Patent Document 1 prevents the positional deviation in the vertical direction and the horizontal direction by pushing and holding the storage component into the gap between the recesses of the tray. However, in the case of an ultra-precise metal part, there is a concern about plastic deformation due to external stress, and the housing part cannot be pushed into the gap between the recesses of the tray.

  Moreover, the tray currently disclosed by patent document 2 laminates | stacks several trays and pinches | interposes storage components between two upper and lower trays. However, in this case, in a state where the upper tray serving as a lid is removed, the support of the storage component becomes unstable. Further, since the storage components are in direct contact with the structural members of the two upper and lower trays, there is a risk of damage due to friction with the structural members, which is not suitable as a storage tray for ultra-precision metal components.

  Moreover, the tray currently disclosed by patent document 3 can prevent intrusion of dust by mounting a storage part in the recessed part of a tray, preventing the position shift to a horizontal direction, and laminating | stacking several trays. It is. However, in this case, since the storage component is simply placed in the concave portion of the tray, it is not possible to prevent displacement due to vertical vibration during transportation by the vehicle and generation of impact force due to vibration. Further, since the storage component is in direct contact with the structural member of the tray, there is a risk of damage due to friction with the structural member, which is not suitable as a storage tray for ultra-precise metal parts.

  On the other hand, storage trays that store parts with special surface treatment that easily peel off and parts that need to avoid adhesion of foreign substances to the surface during storage and transportation are not only stored, It is desirable to have an excellent protection function that covers and protects and prevents local stress from being applied to the housed parts. In addition, it is desirable that the storage tray can be used for storage and transportation in common in parts processing and assembly processes.

  The present invention has been made in view of the above circumstances, and can be used in common in processing and assembling processes of parts that require extremely delicate handling, and has an excellent protection function during storage and transportation. It is an object to provide a storage tray.

In order to achieve the above object, the storage tray of the present invention is a rectangular storage tray for storing plate-like components, and the storage tray is formed by a vacuum molding method or a pneumatic molding method using a synthetic resin material. An integral molding process, having a shape in which irregularities are formed on a single synthetic resin plate having a substantially uniform thickness, and a concave portion for storage along the outer edge of the plate-like component, and the storage purpose A first support member provided on at least a part of the bottom surface of the recess, a second support member provided on a back surface side of the bottom surface and corresponding to the first support member, and a longitudinal direction There are at least one fitting recess in the vicinity of the end portions on both sides, and the storage recess and the fitting recess have two or more storage trays on the first support member. said platelike component when superposed in mounted state, the said bottom surface Characterized in that it forms a fitting structure that enables engagement with the surface side and the back side.

  In the above storage tray, two or more of the storage trays are stacked in the vertical direction, and the lower part is stacked by sandwiching the plate-like components one by one between the two storage trays adjacent vertically. You may support both surfaces of the said plate-shaped component between the said 1st support member of a storage tray, and the said 2nd support member of the said upper adjacent storage tray.

  In the storage tray, the first support member and the second support member may be made of a plate-shaped cushion material.

  In the above storage tray, the first support member and the second support member are arranged with a gap at the periphery of the bottom surface of the storage recess, and the plate-like component is placed between the two storage trays. By sandwiching and stacking, both sides of the plate-like component may be supported with the peripheral edge floating between the first support member and the second support member.

  In the storage tray, a grip allowance for gripping and taking out at least one portion of the plate-shaped component may be provided on the outer peripheral portion of the storage recess.

  It is preferable that said plate-shaped component is an ultra-precision metal thin plate.

  The plate-shaped component is preferably a fuel cell metal separator.

The storage tray of the present invention is provided with a first support member and a second support member on the front side and the back side of the bottom surface of the storage recess. When two or more storage trays of the present invention are stacked in the vertical direction, a plate-like component is stored in the storage recess of the lower storage tray, and the upper storage tray is covered, of the two storage trays adjacent vertically. Thus, the plate-like component is supported by the first support member of the lower storage tray and the second support member of the upper storage tray. That is, by preventing the plate-like component from vibrating in the thickness direction (vertical direction), the fixing position of the plate-like component can be prevented from shifting.
Moreover, since the storage recessed part of the storage tray has a shape along the outer shape of the plate-like component, the plate-like component can be prevented from shifting in the surface direction (horizontal direction). In this way, the plate-like component is held in a constant posture in the state of being housed in the storage tray, and even if vibration is applied to the storage tray due to transportation by a vehicle or the like, vibration impact is applied to the plate-like component. Is difficult to communicate.

  In addition, on the surface of the plate-like component, the portion that is in contact with and covered with the first support member or the second support member does not adhere to foreign matters such as dust, and the performance deteriorates due to the attachment of foreign matter. In addition, problems such as damage can be suppressed.

  Further, in a state where the storage trays of the present invention are stacked, the plate-like component is supported so as to be sandwiched between the first support member and the second support member of the two storage trays adjacent vertically. Therefore, the region other than the portion supported by the first support member and the second support member of the plate-like component does not directly contact the structural member of the storage tray. In this way, if there is an extremely delicate part that may cause scratches due to friction with the structural member by contacting a part of the plate-shaped component directly with the structural member of the storage tray, It can avoid and support a plate-shaped component.

  In addition, the region of the plate-like component other than the portions supported by the first support member and the second support member is supported with a gap between the two storage trays stacked vertically. It becomes. Therefore, the storage tray of the present invention can also be used in common for a semi-assembled product in which other components are assembled on the surface and / or the lower surface of the plate-like component.

  Furthermore, the storage tray of the present invention can have an excellent protective function at the time of storage and transportation as well as storage of the plate-like components by alternately stacking the plate-like components. In other words, the storage trays stacked above serve as a lid, and it is possible to prevent foreign matters such as dust from adhering to the plate-like parts. In addition, the plate-like component can be taken out from the storage tray without opening and closing the lid member as compared with the case where the lid member is provided separately. Therefore, automatic extraction of the plate-like component from the storage tray by the robot arm can be easily realized in the manufacturing process and the processing step of the plate-like component.

It is a perspective view which shows one Embodiment of a storage tray and plate-shaped components, and shows the state by which the plate-shaped components were inserted | pinched between two storage trays, and were accommodated. It is a top view of one Embodiment of a storage tray. In the top view of the storage tray of FIG. 2, it is arrow sectional drawing of an AA direction. It is sectional drawing which shows one Embodiment of a storage tray and plate-shaped components, and shows the plate-shaped components pinched | interposed between two adjacent storage trays made up and down.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing two storage trays 1 (1A, 1B) of the present embodiment and a plate-like component 2 that is stored while the two storage trays 1 (1A, 1B) are stacked. . As shown in FIG. 1, when the two storage trays 1 (1A, 1B) are stacked, the plate-like component 2 is stored so as to be sandwiched between the upper and lower storage trays 1 (1A, 1B). .

<Plate parts>
The plate-like component 2 having the shape shown in FIG. 1 is an example of an object stored in the storage tray 1 of the present embodiment. The plate-like component 2 is an ultra-precise metal component made of, for example, an ultra-precision processed metal thin plate having a thickness of 500 μm or less. The storage tray 1 according to the present invention can be suitably used as a storage tray for such an ultra-precision metal thin plate. The storage tray 1 according to the present invention can be suitably used particularly as a storage tray for a fuel cell metal separator which is an ultra-precision metal part. The plate-like component 2 has a main surface portion 2a, a portion (special plating portion 2b) that has been subjected to surface processing such as special plating at the center thereof, and a peripheral portion 2c. The shape and dimensions of the plate-like component 2 are not particularly limited, but are mainly ultra-precision metal components that need to be handled very delicately and need to prevent plastic deformation due to external stress, and have a thickness of 3 μm to 500 μm. The length of the long sides in the vertical and horizontal directions is preferably about 50 mm to 1200 mm.
In addition, the storage tray 1 of the present invention is based on stacking a plurality of storage trays 1 and sandwiching the plate-like component 2 between two storage trays 1 adjacent to each other in the vertical direction. The plate-like component 2 having a length larger than 1200 mm is not suitable because it becomes difficult to handle.

A special plating film that is easily peeled off is formed on a portion subjected to surface processing such as special plating (special plating portion 2b), and it is preferable to avoid applying local applied stress or frictional force.
The peripheral part 2c of the plate-like component 2 is assembled with other members (as an example, a sealing material is laminated) in the assembly manufacturing procedure of the final product of the ultra-precise metal component. Further, the peripheral edge 2c may be formed with a step or a punching hole by curling or pressing. In any case, the peripheral edge 2c may be thicker than the main surface 2a.

<Storage tray>
The storage tray 1 according to the present invention is made of a synthetic resin material and is integrally molded by a vacuum molding method or a pressure air molding method. Therefore, the storage tray 1 has a shape in which irregularities are formed on a single synthetic resin plate having a substantially uniform thickness.
Moreover, as a synthetic resin material which comprises the storage tray 1, a highly transparent thing can be used. In this case, in a state where the plurality of storage trays 1 are stacked, the stored plate-like component 2 can be directly observed from the outside.
Further, as the synthetic resin material constituting the storage tray 1, materials colored in various colors of chromatic color or achromatic color may be used. In this case, the production lot can be managed by using the storage tray 1 of a different color for each production lot of the plate-like component 2.

FIG. 2 is a plan view showing an embodiment of the storage tray 1. As shown in FIG. 2, the storage tray 1 includes a flat main surface 50, a storage recess 10 that is recessed toward the back of the main surface 50, a fitting recess 20, and a reinforcing recess 30. And an edge 40 extending from the front side to the back side at the outermost peripheral edge of the surface 50.
FIG. 3 is a cross-sectional view taken along the line AA in the plan view of the storage tray 1 of FIG. As shown in FIG. 3, in the storage tray 1 of the present invention, a first support member 60 is disposed on the front side of the bottom surface 11 of the recess 10 for storage, and a second support member 70 is disposed on the back side. .

As shown in FIGS. 2 and 3, in the storage tray 1 of the present embodiment, the main surface 50 is formed in a rectangular shape, and a storage recess 10 is formed in the center in the longitudinal direction. In the vicinity of both end portions in the longitudinal direction, one fitting recess 20 and two reinforcing recesses 30 are formed, respectively.
Moreover, the recessed part 10 for storage, the recessed part 20 for fitting, and the recessed part 30 for reinforcement are the taper shape which the side wall narrows in the downward direction. Moreover, the edge part 40 becomes the taper shape which spreads below. By having such a tapered shape, the recess 10 for storage, the recess 20 for fitting, the recess 30 for reinforcement, and the edge 40 can be fitted on the front side and the back side when the storage tray 1 is stacked. A fitting structure is formed.
Therefore, since the storage tray 1 according to the present invention has such a fitting structure, a plurality of storage trays 1 can be stacked in a compact manner. Further, by having such a tapered shape, it becomes easy to remove the molded product from the mold when the storage tray 1 according to the present invention is molded by a vacuum molding method.

  In FIGS. 2 and 3, the fitting recess 20 of the storage tray 1 is formed in a circular shape in the center of the main surface 50 in the short direction and in the vicinity of both ends in the long direction. The fitting recess 20 has a depth sufficient to prevent the fitting recesses 20 from overlapping each other when the storage trays 1 are stacked with the plate-like component 2 interposed therebetween, and the overlapping storage trays 1 are not displaced from each other. It has become. The shape of the fitting recess 20 is not limited to a circle, and may be a quadrilateral or a groove.

The reinforcing recesses 30 of the storage tray 1 are formed at the four corners of the main surface 50. The reinforcing recess 30 is provided to ensure the strength of the main surface 50. The reinforcing recess 30 of the present embodiment has a circularly recessed shape, but may have a shape that increases the strength in a specific direction, for example, by forming an elongated groove.
The reinforcing recess 30 of the storage tray 1 can also serve as the fitting recess 20 by deepening the groove. In this case, the fitting recess 20 may be omitted.

  Further, the edge portion 40 of the storage tray 1 is formed at the outermost peripheral edge of the main surface 50, and an ear portion 41 is formed at the lower end portion thereof. It is provided to increase the strength of the storage tray 1 and to stably place it on a flat surface. In addition, by forming the edge portion 40 to a sufficient height, it is possible to prevent lateral shift when stacking the storage tray 1 with the plate-like component 2 interposed therebetween, and to improve stability.

The storage recess 10 of the storage tray 1 has a shape that follows the outer shape of the quadrilateral plate-like component 2. The recess 10 for storage has a quadrangular bottom surface 11 and a wall portion 12 extending upward from each side of the bottom surface 11 toward the main surface 50.
In addition, a gripping allowance 13 that is curved and spreads outward is formed in a part of the wall portion 12. In the portion where the grip allowance 13 is formed, the distance between the outer shape of the plate-like component 2 housed in the housing recess 10 and the wall portion 12 is increased. Therefore, by putting a finger into the grip allowance 13, it is possible to place a finger on the edge of the plate-like component 2, and the operator can easily take out the plate-like component 2 from the storage recess 10. In addition, the position of the grip allowance 13 may be any as long as it is a part of the wall 12, and may be disposed at, for example, the four corners of the storage recess 10 in plan view.
Further, since the wall portion 12 is along the outer shape of the plate-like component 2 except for the portion where the grip allowance 13 is formed, the plate-like component 2 is placed in the plane direction in a state where the plate-like component 2 is housed in the housing recess 10. The movement of the shaped part 2 is suppressed.

  Further, as shown in FIGS. 2 and 3, a first support member 60 is fixed in the vicinity of the central portion of the bottom surface 11 of the storage recess 10. A second support member 70 having the same shape as that of the first support member 60 is fixed to a position opposite to the first support member 60 on the back side of the bottom surface 11.

Moreover, the 1st support member 60 and the 2nd support member 70 which are arrange | positioned at the storage tray 1 concerning this invention are formed in the plate shape which has fixed thickness. The first support member 60 and the second support member 70 are preferably made of a cushion material. Although it does not specifically limit as a cushion material used for the 1st support member 60 and the 2nd support member 70 of the storage tray 1 concerning this invention, For example, a polyurethane resin, a polyethylene resin, an acrylic resin, a polyimide resin, etc. A sponge having a cushioning property made of polyurethane foam, polyethylene foam, acrylic foam, polyimide foam, or the like produced by foam molding of the above synthetic resin can be suitably used.
Further, as a cushioning material used for the first support member 60 and the second support member 70, a cushioning material having a cushioning property composed of one or a plurality of airbags in which air is enclosed may be used. good.
Among these cushion materials, as a cushion material used for the first support member 60 and the second support member 70 related to the storage tray 1 of the present invention, polyurethane foam having excellent flexibility and cushioning properties. It is particularly preferred to use a sponge consisting of

Further, the first support member 60 and the second support member 70 are respectively fixed to the front side and the back side of the bottom surface 11 of the storage recess 10 by fixing members. As the fixing member, one or more members selected from a member group consisting of a double-sided adhesive tape, a double-sided pressure-sensitive adhesive tape, an adhesive, a pressure-sensitive adhesive, and hot melt may be used. The application of the adhesive, the pressure-sensitive adhesive, and the hot melt may be performed on the entire surface of the first support member 60 and the second support member 70, or the first support member 60 and the second support member. It may be performed locally at the four corners of 70.
The operator positions the first support member 60 and the second support member 70 when the first support member 60 and the second support member 70 are fixed to the bottom surface 11 of the storage recess 10. A convex portion, a concave portion, a groove, or the like as a marking may be formed so as to be easily performed.

  Further, the first support member 60 and the second support member 70 are arranged with a gap 3 between the four sides and the wall portion 12 of the storage recess 10. Thereby, the 1st supporting member 60 and the 2nd supporting member 70 can support an inner side from the peripheral part 2c so that the peripheral part 2c of the plate-shaped component 2 may be avoided. Other members are assembled to the peripheral edge 2c of the plate-like component 2, and the thickness is larger than that of the main surface 2a. By disposing the first support member 60 and the second support member 70 so as to avoid the peripheral portion 2c, the plate-like component 2 can be supported in a state where the peripheral portion 2c is floated.

  Moreover, it is preferable that the first support member 60 and the second support member 70 have a shape corresponding to the special plating portion 2 b of the plate-like component 2. As a result, the special plating portion 2b of the plate-like component 2 stored between the storage trays 1 from above and below is completely covered by the first support member 60 and the second support member 70. Therefore, it is possible to prevent the special plating portion 2b of the plate-like component 2 from being damaged or dust or the like from being attached during storage or movement.

FIG. 4 is a cross-sectional view illustrating a state of the plate-like component 2 in which two or more storage trays are stacked in the vertical direction and are sandwiched between two storage trays 1 adjacent in the vertical direction. FIG. 4 is a cross section taken along a straight line that crosses the two fitting recesses 20 of the storage tray 1.
In FIG. 4, for easy understanding, A is added to the end of the reference numerals of the upper storage tray 1 and its constituent elements among the upper and lower adjacent storage trays. That is, the first support member 60A and the second support member 70A are provided in the storage recess 10A of the upper storage tray 1A. Similarly, B is added to the end of the reference numerals of the lower storage tray 1 and the component of the two storage trays adjacent vertically. That is, the first support member 60B and the second support member 70B are provided in the storage recess 10B of the lower storage tray 1B. Hereinafter, description will be made using these symbols.

  In the present invention, the plate-like component 2 includes two or more storage trays stacked vertically, and the first support member of the lower storage tray 1B among the two storage trays 1A and 1B adjacent vertically. 60B and the second support member 70A of the adjacent upper storage tray 1A are sandwiched and supported. The first support member 60B and the second support member 70A are both made of a cushion material. Accordingly, the posture of the plate-like component 2 is maintained in the state of being accommodated in the storage trays 1A and 1B, and even if vibration is applied due to transportation by a vehicle or the like, it is difficult for the impact to be transmitted to the plate-like component 2, and the positional displacement or Damage due to vibration friction is unlikely to occur.

  Furthermore, since the first support member 60B and the second support member 70A disposed in the storage tray according to the present invention are cushion materials, the plate-like component is pressed against the plate-like component 2. 2 along the surface shape. As a result, the first support member 60B and the second support member 70A and the plate-like component 2 are less likely to slip, and the plate-like component 2 in the sandwiched state is less likely to be misaligned even when subjected to vibration or the like. Therefore, even when it is subjected to vertical vibration during transportation by a vehicle or the like, the plate-like component 2 is prevented from colliding with the wall portion 12 of the recess 10 for storage, and the plate-like component 2 is caused by external stress. It can be protected from plastic deformation.

As shown in FIG. 4, the plate-like component 2 has two centrally adjacent upper and lower storage trays (1A, 1B) in the vicinity of the central portion (more specifically, the special plating portion 2b shown in FIG. 1). It is sandwiched and supported by the first support member 60B and the second support member 70A. Accordingly, the peripheral edge 2c of the plate-like component 2 is in a state of floating in a hollow state without contacting the storage trays 1A and 1B, and does not contact the storage trays 1A and 1B. When the peripheral edge 2c is a delicate part that may be damaged when brought into contact with the storage trays 1A and 1B, it is possible to prevent the peripheral edge 2c from being damaged.
In addition, the peripheral edge portion 2c is supported with two storage trays 1A and 1B adjacent in the vertical direction with a certain gap in the thickness direction. Therefore, the two storage trays 1A and 1B adjacent to each other in the vertical direction can be used in common for a half-assembled product in which other components (peripheral component 2d) are stacked on the peripheral portion 2c of the plate-like component 2.

In the two storage trays 1A and 1B adjacent in the vertical direction shown in FIG. 4, both the first support member 60B of the storage tray 1B and the second support member 70A of the storage tray 1A are made of a cushion material. Therefore, it is compressed by the weight of the plate-like component 2 and the upper storage tray 1A. The first support member 60 and the second support member 70 are compressed most so that the peripheral edge portion 2c is in a state of floating in the air even when the plate-like component 2 and the storage tray 1 are further stacked. Even in such a state, it is preferable that the thickness be such that a sufficient gap is formed between the peripheral edge 2c and the structural members of the storage trays 1A and 1B.
Note that the thickness of the first support member 60A and the thickness of the second support member 70A are not necessarily the same. Depending on the thickness of the peripheral component 2d to be stacked on the peripheral portion 2c and the stacking direction of the plate-shaped component 2, the thickness of one support member is increased so that the peripheral component 2d is the structural member of the storage tray 1A and the storage It is preferable not to contact the structural member of the tray 1B.

The plate-like component 2 sandwiched between two vertically adjacent storage trays shown in FIG. 4 is placed on the first support member 60B in the storage recess 10B of the lower storage tray 1B. Further, by covering another storage tray 1A from above, it is stored in the two storage trays 1A and 1B. Further, a plurality of plate-shaped components 2 are stored one after another by repeatedly mounting another plate-shaped component 2 in the storage recess 10A of the upper storage tray 1A and stacking another storage tray 1 in succession. it can.
In the two storage trays 1A and 1B adjacent to each other in the vertical direction, the storage tray 1A stacked above serves as a lid. Therefore, it is possible to suppress foreign matters such as dust from adhering to the plate-like component 2. In addition, the plate-like component 2 can be taken out from the storage trays 1A and 1B without opening and closing the lid member as compared with the case where a lid member is provided separately. Therefore, automatic removal of the plate-like component 2 from the storage tray 1 by the robot arm can be easily realized in the manufacturing process and processing step of the plate-like component 2.

  As described above, one embodiment of the present invention has been described. However, each configuration in each embodiment and combinations thereof are examples, and addition, omission, replacement, and the like of the configuration are within the scope of the present invention. And other changes are possible. Further, the present invention is not limited by the embodiment.

DESCRIPTION OF SYMBOLS 1, 1A, 1B ... Storage tray, 2 ... Plate part, 2a ... Main surface part, 2b ... Special plating part, 2c ... Peripheral part, 2d ... Peripheral part, 3 ... Clearance 10, 10A, 10B ... Concave part for storage, DESCRIPTION OF SYMBOLS 11 ... Bottom surface, 12 ... Wall part, 13 ... Grapping allowance, 20 ... Concave part for fitting, 30 ... Concave part for reinforcement, 40 ... Edge part, 41 ... Ear part, 50 ... Main surface, 60, 60A, 60B ... 1st Support member, 70, 70A, 70B ... second support member

Claims (7)

A rectangular storage tray for storing plate-shaped components,
The storage tray is integrally molded by a vacuum molding method or a pressure molding method using a synthetic resin material, and has a shape in which irregularities are formed on a single synthetic resin plate having a substantially uniform thickness,
A concave portion for storing along the outer edge of the plate-shaped component;
A first support member provided on at least a part of the bottom surface of the recess for storage;
A second support member provided at a position corresponding to the first support member on the back side of the bottom surface;
In the vicinity of the ends on both sides in the longitudinal direction, each has at least one fitting recess,
The housing recess, and said fitting recess, two or more of the storage tray, when stacked while placing the plate-shaped parts on the first support member, and the surface side of the bottom surface A storage tray having a fitting structure that can be fitted to the back side.   Two or more of the storage trays are stacked in the vertical direction, and the first part of the storage tray below is stacked by stacking the plate-like components one by one between the two storage trays adjacent vertically. 2. The storage tray according to claim 1, wherein both sides of the plate-like component are supported between the support member and the second support member of the adjacent upper storage tray.   The storage tray according to claim 1 or 2, wherein the first support member and the second support member are made of a plate-shaped cushion material.   The first support member and the second support member are arranged with a gap at the periphery of the bottom surface of the storage recess, and the plate-like components are stacked between the two storage trays. The both sides of the said plate-shaped component are supported in the state which floated the peripheral part between the said 1st supporting member and the said 2nd supporting member, The Claim 2 or Claim 3 characterized by the above-mentioned. Storage tray.   The grip margin for gripping and taking out at least one place of the plate-like component is provided on the outer peripheral portion of the storage recess. Storage tray.   The storage tray according to any one of claims 1 to 5, wherein the plate-like component is an ultra-precision metal thin plate.   The storage tray according to any one of claims 1 to 5, wherein the plate-like component is a fuel cell metal separator.

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