JP6152895B2 - Firing jig - Google Patents

Description

  The present invention relates to a firing jig used for firing ceramic electronic components (chip components). In particular, the present invention relates to a firing jig that can be used repeatedly.

  When firing MLCC (Multi-Layer Ceramic Capacitor) in which ceramic dielectrics such as multilayer capacitors and metal electrodes are multilayered, MLCC is mounted on a so-called “saya” firing jig and placed in a firing furnace. (See Patent Document 1). FIG. 8 is a plan view showing a configuration of a conventional firing jig.

  A conventional firing jig is composed of a plate member 1 shown in FIG. 8 (a) and a net member 2 shown in FIG. 8 (b). A net member 2 is placed on the plate member 1 made of alumina, and a work (MLCC such as a chip) is mounted on the net member 2 and fired. The net member 2 is made of nickel (coated with zirconia on the surface), and provided with flange portions 21 and 22 for fixing the net member 2 to the plate member 1.

  In the example of FIG. 8, since the planar shape of the plate member 1 is trapezoidal, in order to fix the upper bottom portion and the lower bottom portion, one collar portion 21 is provided on the upper bottom portion, and the collar portion 22 is disposed on the lower bottom portion. There are four each. The net member 2 is fixed to the plate member 1 by covering the net member 2 on the plate member 1 and bending the flange portions 21 and 22 so as to embrace the plate member 1.

  FIG. 9 is a plan view and a side view showing a state in which a net member 2 is fixed to a plate member 1 of a conventional firing jig. FIG. 9A is a plan view, and FIG. 9B is a side view. As shown in FIG. 9, the plate member 1 and the net member 2 can be fired without being separated by bending the flange portions 21 and 22 twice so as to embrace the plate member 1.

JP 2000-1111269 A

  However, the plate member 1 may be warped by repeatedly using the firing jig. In addition, firing jigs are often stacked in a plurality of stages using a spacer or the like and placed in a firing furnace, and if the plate member 1 is warped, it becomes difficult to stack the firing jigs. Therefore, it is difficult to reliably mount the MLCC. Therefore, conventionally, when the plate member 1 is warped, the bent flange portions 21 and 22 are returned to the original state, the warped plate member 1 is reversed, and the flange portions 21 and 22 are again connected. It was performed by bending twice and fixing.

  However, the collar portions 21 and 22 are reticulated nickel members, and are susceptible to brittle fracture due to elastic fatigue. There was a problem that, while the flange portions 21 and 22 were repeatedly bent and stretched many times, there was a possibility that they would eventually break due to elastic fatigue.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a firing jig that can be used repeatedly without breaking.

  In order to achieve the above object, a firing jig according to the present invention is a firing jig comprising a plate member formed in a flat plate shape and a net-like net member covering one plane of the plate member. The net member includes at least three hooks that can be bent along the plate member, and the hook of the net member is passed between two opposite hooks in a bent state. The plate member is arranged at a position where the plate member can be inserted and removed so as to come into contact with the other flange.

  In the above configuration, the net member includes at least three hooks that can be bent along the plate member, and the hook of the net member passes between the two opposite hooks in a bent state. The plate member is arranged at a position where it can be inserted and removed so as to come into contact with the other flange. As a result, the warped plate member can be pulled out from the mesh member, inverted, and inserted again, so that elastic fatigue is unlikely to occur in the collar portion of the mesh member, and the collar portion breaks even when repeatedly used. There is nothing. Therefore, it is possible to provide a firing jig that can be used repeatedly.

  Further, in the firing jig according to the present invention, the plate member has a planar shape including an upper bottom portion of a trapezoidal shape and an opposite oblique side portion at an outer edge, and the flange portion of the net member is the plate It is preferable that they are respectively arranged at positions along the upper bottom portion and the oblique side portion of the member.

  In the above configuration, the plate member has a planar shape including an upper bottom portion of a trapezoidal shape and an opposite oblique side portion as outer edges, and the collar portion of the net member is positioned along the upper bottom portion and the oblique side portion of the plate member. Accordingly, the plate member can be easily inserted into and removed from the net member, and the plate member having warpage can be easily reversed. Therefore, elastic fatigue hardly occurs in the heel portion of the net member, and the heel portion does not break even when repeatedly used.

  Further, in the firing jig according to the present invention, the plate member has a rectangular planar shape, and the collar portions of the mesh member are respectively disposed at positions along three adjacent sides of the plate member. Preferably it is.

  In the above configuration, the plate member has a rectangular planar shape, and the collar members of the mesh member are respectively disposed at positions along three adjacent sides of the plate member. Can be easily inserted and removed from the other side where no is disposed, and the warped plate member can be easily reversed. Therefore, elastic fatigue hardly occurs in the heel portion of the net member, and the heel portion does not break even when repeatedly used.

  Further, in the firing jig according to the present invention, the plate member has a loop shape in a planar shape, and the collar portion of the mesh member is disposed at a position along the outer periphery of the plate member, and adjacent to each other. It is preferable that the center angle formed by the heel portions to be 90 degrees or less.

  In the above configuration, the planar shape of the plate member is a loop shape, and the collar portion of the mesh member is disposed at a position along the outer periphery of the plate member, and the central angle formed between the adjacent collar portions is 90 degrees or less. Therefore, the plate member can be easily inserted and removed from the side of the mesh member where the collar portion is not disposed, and the warped plate member can be easily reversed. Therefore, elastic fatigue hardly occurs in the heel portion of the net member, and the heel portion does not break even when repeatedly used.

  In the firing jig according to the present invention, the mesh member is preferably made of nickel or copper.

  In the above configuration, since the material of the mesh member is nickel or copper, it can be used for high temperature firing at about 1200 ° C. in the case of nickel and low temperature firing at about 800 ° C. for copper.

  In the firing jig according to the present invention, the surface of the mesh member is preferably coated with zirconia.

  In the above configuration, since the surface of the mesh member is coated with zirconia, it is possible to prevent the ceramic chip component to be fired from adhering to the mesh member.

  According to the above configuration, since the warped plate member can be pulled out from the mesh member, reversed, and inserted again, the elastic fatigue is not easily generated in the collar portion of the mesh member. Will not break. Therefore, it is possible to provide a firing jig that can be used repeatedly.

It is a top view which shows the structure of the jig | tool for baking which concerns on Embodiment 1 of this invention. It is a three-plane figure which shows the state which inserted the plate member into the net | network member of the jig | tool for baking which concerns on Embodiment 1 of this invention. It is the top view and sectional drawing which show the state in the kiln of the jig | tool for baking which concerns on Embodiment 1 of this invention. It is the top view and perspective view which show the other structure of the jig | tool for baking which concerns on Embodiment 1 of this invention. It is a top view which shows the other structure of the jig | tool for baking which concerns on Embodiment 1 of this invention. It is the top view and side view which show the state which inserted the plate member into the net | network member of the jig | tool for baking which concerns on Embodiment 2 of this invention. It is a top view which shows the structure of the jig | tool for baking which concerns on Embodiment 3 of this invention. It is a top view which shows the structure of the conventional baking jig. It is the top view and side view which show the state which fixed the net | network member to the plate member of the conventional baking jig.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a plan view showing a configuration of a firing jig according to Embodiment 1 of the present invention. The firing jig according to the first embodiment includes a mesh member 2 shown in FIG. 1 (a) and a plate member 1 shown in FIG. 1 (b).

  In the first embodiment, the plate member 1 is a member formed in the shape of a flat plate made of alumina, and is formed so that the planar shape is trapezoidal. The net member 2 has a trapezoidal plan shape similar to the plate member 1 so that one plane of the plate member 1 can be completely covered. At least three flanges 21 and 22 that can be bent along the side are provided. The thickness of the plate member 1 is, for example, 1 mm to 8 mm, and the thickness of the net member 2 is, for example, 0.3 mm to 1.5 mm.

  The material of the net member 2 is preferably nickel or copper. This is because it can be used for high temperature firing at about 1200 ° C. when the material is nickel, and low temperature firing at about 800 ° C. when copper is used. Further, the surface may be coated with zirconia. This is because it is possible to avoid the work (ceramic chip part) to be fired from adhering to the net member 2.

  The collar portion 21 is disposed at the upper bottom portion of the trapezoid of the net member 2, and the collar portion 22 is disposed at a symmetrical position of the opposite hypotenuse portion of the trapezoid of the mesh member 2. The net member 2 is initially provided in a flat plate shape, and the plate member 1 can be inserted and removed by bending the flange portions 21 and 22 in a state of covering one plane of the plate member 1. The angle formed by the opposite hypotenuse portions of the net member 2 is an acute angle, and is appropriately designed within a range of, for example, 30 ° to 60 °. The plate member 1 is inserted / removed in the direction toward the intersection on the extension line of the opposite oblique side portion of the net member 2.

  FIG. 2 is a three-side view showing a state where the plate member 1 is inserted into the net member 2 of the firing jig according to the first embodiment of the present invention. 2A is a plan view, FIG. 2B is a cross-sectional view taken along the line AA of FIG. 2A, and FIG. 2C is a side view. The state in which the plate member 1 is inserted into the net member 2 is shown. Show.

  As shown in FIG. 2, the plate member 1 can be inserted / removed from the trapezoidal lower bottom portion side by bending the collar portions 21 and 22 of the net member 2. In Embodiment 1, the cross-sectional shape of the flange portions 21 and 22 is bent to the other plane side of the plate member 1 so as to have a U-shape (U-shape). However, the present invention is not particularly limited to this. And the plate member 1 may be bent into a shape that can be inserted and removed.

  At the time of firing, a work (ceramic chip part) to be fired is mounted on a firing jig 10 in a state where the plate member 1 is inserted into the net member 2, and placed in a firing furnace. FIG. 3 is a plan view and a cross-sectional view showing a state in the firing furnace of the firing jig 10 according to Embodiment 1 of the present invention. 3A is a plan view of the firing jig 10 in the firing furnace, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. 3A.

  In the first embodiment, as shown in FIG. 3 (a), the firing jig 10 has a trapezoidal plan shape and a mesh from the bottom base side of the trapezoid where the flanges 21 and 22 are not arranged. The plate member 1 can be inserted into and removed from the member 2. A workpiece 12 to be fired is mounted on a firing jig 10 in a state where the plate member 1 is inserted into the net member 2. And as shown in FIG.3 (b), the several baking jig | tool 10 is piled up using the spacer 11, and it puts into a baking furnace.

  Note that the firing jig 10 may be warped by repeated use. Causes of warping include (1) thermal deformation caused by uneven load on the workpiece (chip component) 12 to be mounted, (2) decrease in bending strength due to diffusion of the components of the workpiece 12 and the components of the plate member 1, 3) A difference in density between the front and back of the plate member 1 itself, a difference in porosity, and the like can be considered. Depending on the magnitude of the generated warp, it may be difficult to stack the firing jigs 10. Therefore, it is necessary to correct the warp by inverting the plate member 1.

  Conventionally, the bent portions 21 and 22 of the folded net member 2 are returned to the original state, the plate member 1 in which the warp has occurred is removed, the plate member 1 is inverted, and then the bent portions 21 and 22 are bent again to obtain the plate. The net member 2 was fixed to the member 1. Therefore, when repeatedly used, there is a possibility that elastic fatigue occurs in the collar portions 21 and 22 and they break.

  However, in the first embodiment, the plate member 1 can be inserted into and removed from the mesh member 2 by devising the arrangement of the flange portions 21 and 22, so even if the plate member 1 is reversed, the flange portion There is no need to return 21 and 22 to the original state and bend them again. Therefore, elastic fatigue does not occur, and the collar portions 21 and 22 do not break.

  As described above, according to the first embodiment, the warped plate member 1 can be pulled out from the mesh member 2, inverted, and inserted again, so that elastic fatigue is generated in the flange portions 21 and 22 of the mesh member 2. It is hard to occur, and even if it is used repeatedly, the collar parts 21 and 22 do not break. Therefore, it is possible to provide the firing jig 10 that can be used repeatedly.

  In addition, you may equip the collar parts 21 and 22 of the net | network member 2 in the upper base part other than the trapezoid lower base part, and the whole hypotenuse part to oppose. FIG. 4 is a plan view and a perspective view showing another configuration of the firing jig 10 according to the first embodiment of the present invention. As shown in FIG. 4, the firing jig 10 is composed of a net member 2 and a plate member 1 as in FIGS. 1 and 2.

  The net member 2 has a trapezoidal plan shape like the plate member 1 so that one plane of the plate member 1 can be completely covered, and the flange portions 21 and 22 are opposed to the upper bottom portion of the trapezoid. The entire hypotenuse part is provided. The collar portion 21 is disposed on the entire trapezoidal upper base portion of the mesh member 2, and the collar portion 22 is disposed on the entire hypotenuse portion of the trapezoidal shape of the mesh member 2. As shown in FIG. 4A, the net member 2 is initially provided in a flat plate shape, and the hooks 21 and 22 are bent in a state where one plane of the plate member 1 is covered. As shown, the plate member 1 can be inserted / removed in the direction toward the intersection on the extension line of the opposite oblique side portion of the net member 2.

  In addition, in this Embodiment 1, although the case where the planar shape of the plate member 1 and the net | network member 2 is trapezoid is demonstrated, it is not necessarily restricted to the trapezoid which is a rectangle. In other words, as long as the upper edge of the trapezoid and the opposite hypotenuse part are included on the outer edge of the planar shape, a polygonal shape of a pentagon or more (a shape corresponding to the lower bottom of the trapezoid is formed by a plurality of line segments). Alternatively, the shape corresponding to the lower base portion of the trapezoid may be replaced with an arc shape.

  FIG. 5 is a plan view showing another configuration of the firing jig 10 according to Embodiment 1 of the present invention. As shown in FIG. 5A, a polygonal shape in which a polygon 26 having a triangle or more is added to the lower base portion 25 of the trapezoid may be used. Further, as shown in FIG. 5B, the shape may be such that an arcuate shape 27 is added to the lower base portion 25 of the trapezoid.

(Embodiment 2)
6A and 6B are a plan view and a side view showing a state where the plate member 1 is inserted into the mesh member 2 of the firing jig 10 according to Embodiment 2 of the present invention. 6A is a plan view of the net member 2 of the firing jig 10 according to the second embodiment, and FIG. 6B is a plate member of the firing jig 10 according to the second embodiment. 2 is a side view showing a state in which 1 is inserted into a net member 2. FIG. As shown in FIG. 6, the firing jig 10 according to the second embodiment is different from the first embodiment in that the planar shape is not trapezoidal but rectangular. Due to the difference in shape, the arrangement of the flange portions 21 and 22 is different.

  Also in the second embodiment, the plate member 1 is a flat plate member made of alumina, and is formed so that the planar shape is rectangular. The net member 2 has a rectangular planar shape like the plate member 1 so as to completely cover one plane of the plate member 1, and bends to a position along three adjacent sides of the rectangle of the plate member 1. At least three flanges 21 and 22 are provided.

  The material of the net member 2 is desirably nickel or copper as in the first embodiment. This is because it can be used for high temperature firing at about 1200 ° C. when the material is nickel, and low temperature firing at about 800 ° C. when copper is used. Further, the surface may be coated with zirconia. This is because it is possible to avoid the workpiece (chip component) to be fired from adhering to the net member 2.

  The collar portion 21 is disposed on one side of the rectangular shape of the mesh member 2, and the collar portion 22 is disposed at symmetrical positions on two opposite sides sandwiching one side of the rectangular shape of the mesh member 2. The net member 2 is initially provided in a flat plate shape, and the plate member 1 can be inserted and removed by bending the flange portions 21 and 22 in a state of covering one plane of the plate member 1 (FIG. 6B). )).

  As shown in FIG. 6, the plate member 1 can be inserted and removed from one side of a rectangle where the collar portions 21 and 22 are not arranged by bending the collar portions 21 and 22 of the net member 2. In Embodiment 2, the flanges 21 and 22 are bent to the other plane side of the plate member 1 so that the cross-sectional shape is U-shaped (U-shaped). However, the present invention is not particularly limited to this. And the plate member 1 may be bent into a shape that can be inserted and removed.

  Also in the second embodiment, the plate member 1 can be inserted into and removed from the net member 2 by devising the arrangement of the flange portions 21 and 22, so even when the plate member 1 is reversed, the flange portion 21. , 22 need not be returned to the original state and bent again. Therefore, elastic fatigue does not occur, and the collar portions 21 and 22 do not break.

  As described above, according to the second embodiment, since the warped plate member 1 can be pulled out from the mesh member 2 and inverted and inserted again, elastic fatigue occurs in the flange portions 21 and 22 of the mesh member 2. It is hard to occur, and even if it is used repeatedly, the collar parts 21 and 22 do not break. Therefore, it is possible to provide the firing jig 10 that can be used repeatedly.

(Embodiment 3)
FIG. 7 is a plan view showing the configuration of the firing jig 10 according to Embodiment 3 of the present invention. 7A is a plan view of the net member 2 of the firing jig 10 according to the third embodiment, and FIG. 7B is a plate member 1 of the firing jig 10 according to the third embodiment. FIG. 7C is a schematic diagram showing an arrangement state of the collar portion of the net member 2 of the firing jig 10 according to the third embodiment. As shown in FIGS. 7A and 7B, the firing jig 10 according to the third embodiment is different from the first and second embodiments in that the planar shape is a loop shape, for example, an annular shape. To do.

  Also in the third embodiment, the plate member 1 is a flat plate member made of alumina, and is formed so that the planar shape is an annular shape. The net member 2 has an annular plane shape like the plate member 1 so that it can completely cover one plane of the plate member 1 and can be bent to a position along the outer periphery of the plate member 1. At least three parts 23 are provided.

  The material of the net member 2 is preferably nickel or copper as in the first and second embodiments. This is because it can be used for high temperature firing at about 1200 ° C. when the material is nickel, and low temperature firing at about 800 ° C. when copper is used. Further, the surface may be coated with zirconia. This is because it is possible to avoid the workpiece (chip component) to be fired from adhering to the net member 2.

  The at least three flanges 23 are the outer peripheral portions of the return net member 2 and are disposed at symmetrical positions with the one flange 23 and the one flange 23 interposed therebetween. The net member 2 is initially provided in a flat plate shape, and the plate member 1 can be inserted / removed in the direction of the arrow by bending the collar 23 in a state of covering one plane of the plate member 1. As shown in FIG. 7 (c), the three flange portions 23 have a central angle θ formed by the adjacent flange portions 23 of 90 degrees or less, so that the plate is viewed from one direction where the flange portions 23 are not arranged. The member 1 can be inserted and removed.

  Also in the third embodiment, the plate member 1 can be inserted and removed by devising the arrangement of the flange portion 23. Therefore, even when the plate member 1 is reversed, the flange portion 23 is restored as in the conventional case. There is no need to return to this state and bend it again. Therefore, elastic fatigue does not occur, and the flange 23 is not broken.

  As described above, according to the third embodiment, even when the plate member 1 is reversed, the warped plate member 1 can be pulled out from the mesh member 2, reversed, and inserted again. Elastic fatigue hardly occurs in the flange portion 23 of the member 2, and the flange portion 23 does not break even when it is repeatedly used. Therefore, it is possible to provide the firing jig 10 that can be used repeatedly.

  In addition, it goes without saying that Embodiments 1 to 3 described above can be changed without departing from the gist of the present invention. For example, the planar shape of the plate member 1 is not limited to the shape shown in the first to third embodiments. For example, the planar shape of the plate member 1 can be stacked and put into a firing furnace so as to have a fan shape. Any shape is acceptable. Also in the third embodiment, the planar shape is not limited to a perfect circular ring shape, and the same effect can be expected as long as it has a loop shape like an elliptical return shape.

1 plate member 2 mesh member 10 firing jig 21, 22, 23

Claims (6)

A plate member formed in a flat plate shape;
A firing jig comprising: a net-like net member covering one plane of the plate member;
The net member includes at least three hooks that can be bent along the plate member;
The said collar part of the said net | network member is arrange | positioned in the position which can insert / remove the said plate member so that it may pass between two opposing collar parts and contact | abuts another collar part in the bent state. Characteristic firing jig. The plate member has a planar shape including an upper base portion of a trapezoidal shape and an opposite oblique side portion at an outer edge,
The firing jig according to claim 1, wherein the flange portion of the mesh member is disposed at a position along an upper bottom portion and a hypotenuse portion of the plate member. The plate member has a rectangular planar shape,
2. The firing jig according to claim 1, wherein the flange portions of the mesh member are respectively disposed at positions along three adjacent sides of the plate member. The plate member has a loop shape in plan view,
The said collar part of the said net | network member is each arrange | positioned in the position along the outer periphery of the said board member, The center angle which adjacent collar parts make is 90 degrees or less, The Claim 1 characterized by the above-mentioned. Firing jig.   The firing jig according to any one of claims 1 to 4, wherein a material of the net member is nickel or copper.   The firing jig according to claim 5, wherein a surface of the net member is coated with zirconia.

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