JP2022025748A - Firing fixture carrier device and firing fixture - Google Patents

Abstract

To provide a firing fixture carrier device having excellent carriability and used in a roller hearth kiln, and a firing fixture.SOLUTION: In a firing fixture carrier device used in a roller hearth kiln and carrying the object to be carried by a carrier part, the object to be carried is a firing fixture mounted with the body to be fired. The firing fixture is made of a planar setter and two or more ribs provided at a side confronted with a roller of the setter. The ribs are formed at relatively confronted two sides orthogonal to the carrier direction of the setter or all of two sides relatively confronted with a direction parallel to the carrier direction and two sides relatively confronted with a direction orthogonal to the carrier direction, the rollers are formed with plural grooves in the carrier direction within a range contacted with the ribs, the width of the grooves is 0.1 to 0.25 times the width of the whole range contacted with the ribs, the number of the grooves is three or more, and the respective grooves are arranged in parallel.SELECTED DRAWING: Figure 1

Description

The present invention relates to a firing jig transfer device and a firing jig used in a roller hearth rush used for firing ceramic electronic parts and the like.

In the roller hearth kiln used for firing ceramic electronic parts, a plurality of rollers are arranged substantially in parallel, and a plate-shaped or box-shaped firing jig (also called a setter) is carried while rolling on the rollers. In the meantime, firing is performed.

Ideally, this firing jig should move parallel to the direction perpendicular to the axis of the roller from the beginning to the end of the transfer. There were problems that the tool meandered in the direction of travel, was biased toward the end of the roller, and the firing jig slipped and the predetermined firing was not performed.

In order to solve the above-mentioned problems, for example, in Patent Document 1, in order to prevent displacement such as meandering of the sheath or the base plate, a sheath or a base plate equipped with a ceramic to be fired is placed on a rotating roller. In a roller hearth furnace, the roller has at least one guide protrusion around the roller, and the sheath or the base plate has a- (minus) or + (plus) -shaped groove on the bottom surface thereof. However, there is disclosed a roller hearth furnace in which the groove comes into contact with the guide projection of the roller and is guided and conveyed.

Further, Patent Document 2 discloses a technique in which a spiral groove is formed on the surface of a roller to make an object to be fired such as a tile conveyed on the roller less slippery.

Japanese Unexamined Patent Publication No. 8-189774 Jitsukaisho 62-12229 No.

The technique described in Patent Document 1 requires that all rollers are provided with guide protrusions one by one, which increases the cost. In addition, if the width of the groove of the firing jig that conveys on the roller and the distance between the adjacent grooves are different from the guide protrusion of the roller, the guide protrusion provided on the roller may be chipped, resulting in durability problems. Therefore, there are restrictions on the firing jigs that can be used, and the versatility is lacking.

In the technique described in Patent Document 2, since a spiral groove is formed on the surface of the roller, the roller and the setter are less likely to slip from each other, but the spiral groove is not directly linked to the effect of preventing meandering. Even if such a groove is accurately formed on the surface of the roller, it is still difficult to completely prevent the setter from meandering. In addition, the cost is high in the first place. On the other hand, even if a groove is provided parallel to the traveling direction instead of a spiral shape, for some reason, if the setter warps and the setter does not fit into the groove of the rotor well, meandering will occur little by little, and at all. No effect.

The present invention has been made in view of the above, and by imparting a simple structure to the firing jig and the roller, it is possible to suppress the meandering of the firing jig when it is conveyed in the roller hearth kiln. The purpose is to provide a firing jig that can be used.

The firing jig transporting device of the present invention is a firing jig transporting device used in a roller harskirun that transports an object to be transported by a transport section, and the object to be transported mounts a body to be fired. It is a firing jig, and the firing jig is composed of a plate-shaped setter and two or more ribs provided on the side facing the roller of the setter, and the ribs are in the transport direction of the setter. It is formed on two sides facing each other at right angles, two sides facing each other in a direction parallel to the transport direction, and two sides facing each other in a direction orthogonal to the transport direction, and the transport portion is a roller. A plurality of grooves are formed in the roller in the range of contact with the rib in the transport direction, and the width of the groove is 0.1 with respect to the width of the entire range of contact with the rib. It is characterized in that the number of grooves is 3 to 0.25 times, the number of the grooves is 3 or more, and the grooves are arranged in parallel.

In the ribs formed on all of the two sides facing each other orthogonal to the transport direction of the setter, the two sides facing each other in the direction parallel to the transport direction, and the two sides facing each other in the direction orthogonal to the transport direction. It is preferable that a plurality of pillars are further formed on the surface in contact with the roller, and the width of the pillars is preferably 1.1 times or more and 1.3 times or less the width of the groove.

When looking at the cross section parallel to the rotation axis of the roller, the plurality of grooves formed in the roller have a shape in which trapezoids having a bottom width smaller than the opening are arranged in parallel, and are formed in the rib. It is preferable that the plurality of pillars are formed so as to mesh with the plurality of grooves of the roller.

The firing jig of the present invention is used to convey the object to be fired by a roller in the roller hers knives, and the firing jig is provided on the side facing the setter and the roller of the setter. It consists of two or more ribs, and the ribs are two sides facing each other orthogonal to the transport direction of the setter, two sides facing each other in a direction parallel to the transport direction, and facing each other in a direction orthogonal to the transport direction. It is characterized in that it is formed on all of the two sides.
Further, it is preferable that a plurality of pillars are formed on the surface of the rib in contact with the roller.

By having such a configuration, the firing jig conveyed inside the roller harsher kiln does not meander or bias, and appropriate firing is performed.

According to the present invention, the setter carried inside the roller herring kiln is provided with a simpler structure as compared with the conventional case, in which a groove is formed in the roller and a pillar is formed in the rib provided in the setter. Since it does not meander or bias and does not slip, proper firing is possible.

It is a partial perspective view (1a) of the roller used in this invention, and the plan view (1b) of the roller which shows the width (W1) of the groove provided in a roller, and the spacing (T1) between adjacent grooves. It is a perspective view (2a) of the setter provided with the rib used in the present invention, and is the partial perspective view (2b) which turned over the setter provided with the rib and enlarged. It is sectional drawing of the rib seen from the front in the traveling direction of the setter provided with a rib, and shows the width (W2) of the pillar provided in the rib, and the spacing (T2) between adjacent pillars.

Hereinafter, the firing jig transfer device and the firing jig of the present invention will be described in detail with reference to the drawings. The figures shown in the present invention are all simplified and emphasized for the sake of explanation, and the detailed shapes, dimensions, and ratios are different from the actual ones. Further, other components unnecessary for the description of the present invention are omitted. In addition, the display of arrows and symbols is omitted for the same configuration.

The firing jig transporting device of the present invention is a firing jig transporting device used in a roller harskirun that transports an object to be transported by a transport section, and the object to be transported mounts a body to be fired. The firing jig 14 is a firing jig 14, which comprises a plate-shaped setter 10 and two or more ribs 11 provided on the side of the setter 10 facing the roller 1. Is formed on all of the two opposite sides of the setter 10 that are orthogonal to the transport direction, the two sides that are opposed to the direction parallel to the transport direction, and the two sides that are opposed to the direction orthogonal to the transport direction. The transport portion is a roller 1, and a plurality of grooves are formed in the roller 1 in the range of contact with the rib in the transport direction, and the width of the groove is in contact with the rib 11. The width is 0.1 to 0.25 times the width of the entire range, the number of the grooves is three or more, and the grooves are arranged in parallel.

The roller hers Kiln can be widely applied to known ones and does not need to be particularly limited. Further, components other than the roller 1 may be arbitrarily added as long as they do not affect the present invention.

The object to be transported is a firing jig 14 on which a body to be fired is placed.
The body to be fired is a ceramic for electronic parts, and is a molded body before firing. Also in this case, the material and shape are not particularly limited, and known ceramics are used.

The firing jig 14 includes a setter 10 and two or more ribs 11 provided on the side of the setter 10 facing the roller 1. Specifically, the rib 11 is formed on the opposite side of the surface on which the body to be fired of the setter 10 is placed, that is, on the side facing the roller 1, and the rib 11 and the roller 1 are in contact with each other. The setter 10 may warp during firing, which causes meandering and bias during transport of the setter 10. In the present invention, the setter 10 is provided with the ribs 11, the ribs 11 are provided with a plurality of specific pillars 13, and the rollers 1 are provided with a plurality of specific grooves corresponding to the specific pillars 13. It is suppressing.

The setter 10 and the rib 11 are also made of ceramics. The material of the ceramics is not particularly limited, but preferably silicon carbide or a material coated on the surface of silicon carbide may be mentioned.

The transport unit is a roller 1. Although not shown, the plurality of rollers are supported at both ends and are rotationally driven by a driving force from a joint connected to the end of the roller. FIG. 1 is a schematic view of a roller 1 according to an aspect of the present invention, and a part thereof is viewed from a slope and a plane (FIGS. 1a and 1b). FIG. 2 is an overall perspective view (FIG. 2a) of the firing jig 14 according to one aspect of the present invention, and is an enlarged partial perspective view of the setter 10 provided with the rib 11 turned over (FIG. 2b). .. FIG. 3 is a schematic view illustrating the width W2 of the pillar 13 and the distance T2 between adjacent pillars as seen from the cross section of the rib 11.

As shown in FIG. 1, a plurality of narrow grooves 2 are formed on the surface of the roller 1 in parallel with the circumferential direction of the roller 1.

It is desirable that the groove 2 is parallel to the circumferential direction of the roller 1 as much as possible, but the extent to which the groove 2 is displaced to the left or right within 5 ° with respect to the circumferential direction is permitted in the present invention.

The number of grooves 2 is not particularly limited as long as the number of grooves 2 is 3 or more within the range of the width in which any one rib abuts, and corresponds to the width W1 of the grooves 2 and the distance T1 between the adjacent grooves 2. Therefore, it is preferable to set it in a timely manner.

The width W1 of the groove 2 is usually 0.8 to 1.2 mm, preferably 0.9 to 1.0 mm. The distance T1 between the adjacent grooves 2 is usually 0.8 to 1.2 mm, preferably 0.9 to 1.1 mm. The width W1 of the groove 2 is 0.1 to 0.25 times, preferably 0.12 to 0.24 times, the width of the entire range in contact with the rib 11.
The depth of the groove 2 is not particularly limited, but if it is too shallow, the meandering prevention effect cannot be obtained, and if it is too deep, there is a concern that particles may be clogged. Therefore, it is preferably 0.2 to 1 mm.

The groove 2 may be formed on the surface excluding both ends of the roller 1 at least in a region in contact with the rib 11 of the setter 10, and may be formed on the entire surface. However, when the formed region of the groove 2 is 65 to 85% of the entire surface including both ends of the roller 1, the load applied to the roller 1 is dispersed, and the effect of preventing the roller 1 from being deformed by the groove 2 and the groove 2 are obtained. The effect of suppressing surface peeling from the portion is more preferable because it can be efficiently balanced.

Next, as shown in FIG. 2, the setter 10 according to the present invention has a surface on which a body to be fired is placed and an opposite surface facing the roller 1, and ribs 11 are formed on the opposite surface. There is.
The ribs 11 are formed on all of the two opposite sides of the setter 10 orthogonal to the transport direction, the two sides facing the direction parallel to the transport direction, and the two sides facing each other in the direction orthogonal to the transport direction. Has been done. That is, the ribs 11 are provided on two opposite sides of the plate-shaped setter 10 in the traveling direction, or on all four sides so as to surround the peripheral edge of the setter 10.

A plurality of pillars 13 are formed on the contact surface 12 of the rib 11 with the roller 1 so as to be substantially parallel to each other. The pillar 13 is an elongated columnar protrusion, for example, a square columnar protrusion.
The grooves 2 and the pillars 13 are formed substantially parallel to each other, and the unevennesses of the grooves 2 and the pillars 13 come into contact with each other so as to mesh with each other, so that the setter 10 also moves straight in substantially parallel to the direction in which the roller 1 rotates. ..

As will be described later, the pillar 13 is formed corresponding to the width W1 and the distance T1 of the groove 2 formed on the surface of the roller 1. However, other than the above-mentioned requirements, there is no problem even if it is freely designed without any special restrictions.

As described above, the pillar 13 is designed to mesh with the groove 2 of the roller 1 when it comes into contact with the surface of the roller 1. Therefore, it is desirable that the plurality of pillars 13 are substantially parallel to the circumferential direction of the roller 1, but the degree of deviation to the left or right within 5 ° with respect to the circumferential direction is also acceptable in the present invention. Will be done.

Specifically, as long as the number of pillars 13 per rib is 3 or more, the number of pillars 13 is not particularly limited and may be set in a timely manner. Here, it is preferable to provide about 3 to 5 grooves corresponding to the width W1 of the grooves 2 and the distance T1 between the adjacent grooves 2.

The width W2 of the pillar 13 is usually 0.6 to 1.0 mm, preferably 0.7 to 0.9 mm. The distance T2 between the adjacent pillars 13 is usually 0.6 to 1.4 mm, preferably 1.0 to 1.3 mm.
The depth of the pillar 13 is not particularly limited, but if it is too shallow, the meandering prevention effect cannot be obtained, and if it is too deep, there is a concern that particles may be clogged. Therefore, it is preferably 0.2 to 1.0 mm. ..

The pillar 13 is formed on the entire contact surface 12 (100%) between the rib 11 and the roller 1, but it is not always necessary that the pillar 13 is formed 100%, and if it is 90% or more, the present invention is used. The effect of is obtained. More preferably, when the area of the contact surface 12 is 100% and the area where the pillar 13 is formed is 93 to 96%, the contact resistance with the roller 1 is relaxed, so that the setter 10 is used as a roller. Since it can be conveyed on No. 1 without meandering and rolling resistance is reduced, the risk of catching between the pillar 13 and the groove 2 can be reduced.

In the present invention, the groove width W1 is preferably 1.1 times or more and 1.3 times or less the pillar width W2. If W1 / W2 is less than 1.1 times, the pillar 13 is difficult to fit in the groove 2, and if it is not fitted properly, the effect of the setter 1 moving straight in the transport direction may not be obtained. However, when W1 / W2 exceeds 1.3 times, it is assumed that the pillar 13 rattles to the left and right in the gap of the groove 2, and there is a concern about vibration of the setter during transportation.

In the present invention, the groove 2 of the roller 1 has a size with some play with respect to the shape of the pillar 13 of the rib 11 (width W2 and spacing T2), so that the firing jig meanders from the start to the end of transfer. You can go straight without doing it.

As a modification of the present invention, a pillar formed on the contact surface 12 between the rib 11 and the roller 1 when the rib 11 is formed along the four sides of the setter 10 so as to further enhance the straightness of the setter 10. If the contact surface 13 is parallel to the groove of the roller 1 on the contact surface parallel to the transport direction and diagonally on the contact surface perpendicular to the traveling direction, that is, 40 to 60 ° with respect to the traveling direction, the straight running stability and slip suppression are suppressed. It is preferable because the effects are exhibited in a superimposed manner.

Hereinafter, the present invention will be specifically described based on examples, but the present invention is not limited to the examples shown below.

[Common conditions-manufacturing of firing jig 14]
A methylcellulose binder was added to a commercially available silicon carbide powder raw material and mixed to obtain a mixture. Water is added to the mixture and kneaded, and a plate-shaped body having a size of 150 mm × 150 mm × thickness 2 mm and a porous molded body having ribs 11 having a thickness of 5 mm × 150 mm × thickness 0.5 mm formed on the four sides thereof are formed by press molding. Obtained.

(Example 1)
A phenol resin was added as a binder and boron carbide was added as a sintering aid and mixed with a commercially available silicon carbide powder raw material to obtain a mixture. Water was added to the mixture and kneaded to form a long cylindrical roller 1 having an outer diameter of 34 mm and a total length of 2300 mm. At this time, the groove width W1 was set to 1.0 mm, the distance T1 between adjacent grooves was set to 1.0 mm, and a groove having a depth of 0.5 mm was formed on the entire surface excluding 50 mm from both ends of the roller 1. Then, this was sintered at 2200 ° C. to prepare a roller 1.
The width W2 of the pillar 13 is set to 0.8 mm and the distance T2 between the adjacent pillars is set on the entire contact surface 12 of the rib 11 of the porous molded body obtained as described above with the roller 1. Three pillars having a thickness of 1.2 mm and a depth of 0.5 mm were formed and sintered at 2300 ° C. to prepare an experimental firing jig 14.

(Example 2)
The groove width W1 was set to 0.8 mm, the distance T1 between adjacent grooves was set to 1.2 mm, and other than that, a roller was produced in the same manner as in Example 1. On the other hand, the width W2 of the pillars was set to 0.6 mm, the distance T2 between adjacent pillars was set to 0.6 mm, and other than that, the firing jig 14 for the experiment was produced in the same manner as in Example 1.

(Example 3)
A roller was produced in the same manner as in Example 1 except that the groove width W1 was 1.2 mm and the distance T1 between adjacent grooves was 0.8 mm. On the other hand, the width W2 of the pillars was 1.0 mm, the distance T2 between the adjacent pillars was 1.0 mm, and other than that, the firing jig 14 for the experiment was produced in the same manner as in Example 1.

(Example 4)
A roller was produced in the same manner as in Example 1 except that the groove width W1 was 1.0 mm, the distance T1 between adjacent grooves was 1.0 mm, and the depth was 0.4 mm. On the other hand, the width W2 of the pillars is 0.8 mm, the distance T2 between adjacent pillars is 1.2 mm, the depth is 0.6 mm, and other than that, the firing jig for experiments is the same as in Example 1. 14 was made.

(Example 5)
A roller was produced in the same manner as in Example 1 except that the groove width W1 was 1.0 mm, the distance T1 between adjacent grooves was 1.0 mm, and the depth was 0.6 mm. On the other hand, the width W2 of the pillars is 0.8 mm, the distance T2 between adjacent pillars is 1.2 mm, the depth is 0.4 mm, and other than that, the firing jig 14 for experiments is the same as in Example 1. Was produced.

(Comparative Example 1)
The contact surface 12 between the rib 11 and the roller 1 was made flat without forming pillars, and the rollers were manufactured in the same manner as in Example 1 except for the pillars. As the setter, the firing jig 14 produced in Example 1 was used.

(Comparative Example 2)
On the surface of the roller 1, a spiral groove is crossed at 45 ° with respect to the rotation axis direction of the roller 1 with the same width W1 and interval T1 as the groove of the roller of the first embodiment, and the rest is the same as that of the first embodiment. To make a roller. As the setter, the firing jig 14 produced in Example 1 was used.

(evaluation)
The obtained setters of Examples 1 to 5 and Comparative Examples 1 and 2 were subjected to a furnace passing test (maximum temperature rise rate (° C./H) = 100,000) with a general-purpose roller hers kiln. Then, the straightness, traveling speed, and temperature followability of the setter were evaluated. For straightness, pass the setter through a roller hers kiln heated to 1400 ° C, and the one that does not meander is ◎, and the one that meanders slightly (at the visual level, it moves in the direction perpendicular to the traveling direction of about half the width of the setter). Was marked with Δ, and the one with a large meandering (moving in the direction perpendicular to the traveling direction beyond the width of the setter at the visual level) was marked with ×. As for the traveling speed, the one that reached the exit in the predetermined time expected from the roller rotation speed was marked with ⊚, the one that was slightly delayed was marked with Δ, and the one that was significantly delayed was marked with ×. As for the temperature followability, those with good temperature followability and no occurrence of firing unevenness at the visual level are ◎, and those with scattered firing unevenness due to a slight delay in temperature followability are △, and the temperature followability is large. Those in which uneven firing occurred on 1/3 or more of the surface due to the delay in firing were marked with x. In the overall evaluation, all ◎ items were evaluated as ◎, those with even one × were evaluated as ×, those other than these were evaluated as △, and Δ and ◎ were evaluated as acceptable. Table 1 summarizes these conditions and results.

As is clear from the results in Table 1, in the range of the present invention, the setter is conveyed with almost no meandering or bias, and the temperature follow-up caused by the slip of the roller 1 and the firing jig 14. It can be said that there is little deterioration in sex.

Here, Example 1 can be said to be the ideal shape in the present invention. On the other hand, in Examples 2 and 3, the width of the groove or the pillar is at the upper and lower limits of the more preferable range of the present invention, and in comparison with Example 1, the straightness is straight and slightly inferior. It can be said that it does.

Further, in Examples 4 and 5, the groove or pillar depth is changed from the value of Example 1, but during transportation, a slight slip occurs and the traveling speed becomes slow, and the traveling speed becomes slow. In comparison with No. 1, there was a tendency for the followability to decrease relatively.

On the other hand, Comparative Example 1 in which the pillar was not provided had poor straightness. Further, in Comparative Example 2 having a groove crossing with respect to the traveling direction of the roller, although the straightness is slightly improved in comparison with Comparative Example 1, the traveling speed of the setter and the temperature followability are improved. After all it was not satisfactory.

1 Roller 2 Groove W1 provided on the roller Width of the groove provided on the roller T1 Spacing between adjacent grooves provided on the roller 10 Setter 11 Rib 12 Contact surface between the rib and the roller 13 Pillar 14 provided on the rib Baking jig W2 Width of pillars provided on ribs T2 Spacing between adjacent pillars provided on ribs

Claims (5)

In a firing jig transfer device that is used in roller kilns and transports objects to be transported by a transport unit.
The object to be transported is a firing jig on which a body to be fired is placed.
The firing jig is composed of a plate-shaped setter and two or more ribs provided on the side facing the rollers of the setter.
The ribs are formed on all of the two sides facing each other orthogonal to the transport direction of the setter, the two sides facing each other in the direction parallel to the transport direction, and the two sides facing each other in the direction orthogonal to the transport direction. Orthogonal
The transport portion is a roller, and the roller is formed with a plurality of grooves in the transport direction within a range of contact with the rib.
The width of the groove is 0.1 to 0.25 times the width of the entire range in contact with the rib.
A firing jig transfer device characterized in that the number of the grooves is three or more and the grooves are arranged in parallel. In the ribs formed on all of the two sides facing each other orthogonal to the transport direction of the setter, the two sides facing each other in the direction parallel to the transport direction, and the two sides facing each other in the direction orthogonal to the transport direction. Multiple pillars are formed on the surface that comes into contact with the rollers.
The firing jig transfer device according to claim 1, wherein the width of the pillar is 1.1 times or more and 1.3 times or less the width of the groove. When looking at the cross section parallel to the rotation axis of the roller, the plurality of grooves formed in the roller have a shape in which trapezoids having a bottom width smaller than the opening are arranged in parallel.
The firing jig transfer device according to claim 2, wherein the plurality of pillars formed on the ribs are formed so as to mesh with the plurality of grooves of the roller. Roller A firing jig used to transport a fired object by a roller in a hearth kiln.
The firing jig comprises a setter and two or more ribs provided on the side of the setter facing the roller.
The ribs are formed on all of the two sides facing each other orthogonal to the transport direction of the setter, the two sides facing each other in the direction parallel to the transport direction, and the two sides facing each other in the direction orthogonal to the transport direction. A firing jig characterized by being The firing jig according to claim 3, further comprising a plurality of pillars formed on the surface of the rib in contact with the roller.

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