JP4632681B2 - Powder press molding apparatus and ceramic manufacturing method using the same - Google Patents

Description

  The present invention relates to a powder press molding apparatus for manufacturing ceramics in which a plurality of apertures are circumscribed in a direction opposite to each other to form communication holes, and further relates to a method for manufacturing ceramics using the same. It is used in the fields of packages equipped with electronic components, flow path members such as gas and liquid, and joints.

  Conventionally, in order to mass-produce ceramics efficiently, general methods for forming ceramics such as a powder press molding method, a doctor blade method, an injection molding method and a cast molding method are used. For shaped products, powder press molding is often used.

  The powder press molding method is a method in which a ceramic raw material powder is press-molded into a desired product shape using a powder press molding apparatus. Thereafter, the molded green body is sintered at a predetermined temperature to obtain a product. For example, it is used for molding a simple package on which an electronic component is mounted or a lid thereof.

Figure 3 is a package which is manufactured using the powder press forming apparatus of the traditional shows, (a) is a perspective view of a package, (b) is a cross-sectional view taken along line Y-Y of (a) It is .

A package 50 shown in FIG. 3 includes a space 51 for mounting electronic components and various elements, and a partition wall 52 that surrounds the space 51 and is opened in one direction.

Then, in order to produce the package 50 effectively it may be used a powder press forming apparatus including a mold and a die and upper and lower punches, in FIG. 4, the ceramic material to a mold powder press molding device The process of supplying powder and press molding is shown in a cross-sectional view.

The powder Suepu press forming apparatus 40 includes a die 41 having a space portion 42 having a substantially product shape, the upper punch 43 for pressurizing the ceramic raw material powder 46 is inserted into the spatial portion 42, the lower punch 44 And a die comprising a lower floating punch 47 inserted into a through-hole provided in the lower punch 44. Then, the feeder 45 for filling the ceramic raw material powder 46 in the space 42 of the die 41 to slide parallel to the dialog 41 upper surface is provided.

Incidentally, FIG. 4 (a) ~ (c) shows a longitudinal sectional view showing a molding step of a conventional powder press molding apparatus, other parts are as not shown.

Using this powder Suepu press forming apparatus 40, in order to produce the package 50, as shown in FIG. 4 (a), is inserted a portion of the tip of the lower punch 44 in the die 41, the lower punch 44 by inserting part of the lower floating punch 47 into the through hole, is protruded a-edge by remote Moreover tip of the lower punch 44, the die 41, the tip of the lower punch 44, in the beauty under the floating punch 47 tip Oyo the space 42 opening formed in one direction, and thereafter filled with ceramic raw material powder 46 into the space portion 42, (b), the ceramic raw material powder 46 by inserting the upper punch 43 into the die 41 Is pressed and the upper punch 43 is lowered to the pressurizing completion position to obtain a ceramic molded body. Thereafter, as shown in (c), is raised and the lower punch 44 and the lower floating punch 47, and releasing the ceramic molded body 55 from the mold parts flour Suepu press forming apparatus 40, baked it As a result, ceramics have been obtained.

  Such a powder press molding apparatus and a ceramic manufacturing method using the same are described in the powder molding apparatus shown in Patent Document 1 and the powder molding method shown in Patent Document 2.

Then, through these steps, it is shown to electronic package 50 of the component mounting in Figure 3 is produced.

Further, as for a package using such ceramics, as shown in Patent Document 3 and the like, a package in which a piezoelectric vibration element or the like is mounted is exemplified.
Japanese Utility Model Publication No. 6-592 Japanese Patent Laid-Open No. 1-27737 JP 2002-344277 A

  However, in recent years, the shape is not limited to a simple space portion 51 such as the package 50 shown in FIG. 3, and for example, the space portions 31 a and 32 b are provided on opposite surfaces as shown in FIG. 2. There has been a demand for a package 30 or the like that is formed by opening a circumscribed hole in a direction opposite to each other to form a communication hole.

And it is impossible to produce such a package 30 by the molding process as shown in FIG. 4 described above. For example, a ceramic green sheet is produced using a doctor blade method, and a space portion 31a and Even if it is attempted to produce by laminating with an opening to be 32b, it is costly. Also, when producing ceramics for forming the package 30 as shown in FIG. with the mold having a complicated shape corresponding to the product structure becomes expensive required such, because the slow forming speed, mass production there is a problem that inferior as compared with powdered Suepu press forming apparatus. Moreover, the raw material used because it contains a large amount of binder, required 4-5 times longer degreasing as compared to the ceramic molded body formed by powder Suepu press forming apparatus, said low productivity There were also challenges.

  In addition, the cast molding method also has a problem that it lacks mass productivity.

Thus, the powder press forming apparatus of the present invention is a powder press molding apparatus for molding a ceramic raw material powder, provided with a die having a die and upper and lower punches, the upper punch and the lower punch provided a through-hole to insert the on the floating punch and under the floating punch respectively, wherein the distal end portion of said lower floating punch and the upper floating punch was made to slide in close proximity.

Furthermore, among the heave punches, after filling the ceramic raw material powder inserted City, Previous Symbol space in the space portion of the die to the larger area of the distal end surface of the distal end portion, the space and the other floating punch It is characterized by being inserted into the part.

The front Kisora The inter and the upper floating punch or the lower floating punch that is inserted after f, gap between the upper punch or the lower punch, which is arranged around it at 0.005~0.02mm It is characterized by being.

Also, gaps tip of the lower floating punch and the upper floating punch is slid in proximity to being a 0.01～0.03Mm.

The method of manufacturing a ceramic of the present invention, the powder using a press-forming device, a step of inserting a portion of the lower punch into the die, one of the lower floating punch into the through hole of the pre-Symbol lower punch insert the parts are protruded tip portion, the die, the tip of the lower punch, forming a recess having a stepped at the tip portion of and said lower floating punch, ceramic raw material powder into the recess and a step of filling, and the upper punch, by inserting said distal end portion of the front end surface area is an area smaller than the upper floating punch of the lower floating punch inserted into the through hole of the upper punch into the die is lowered, a step of Ru slide in close proximity to said on floating punch and the lower floating punch, a step of pressing the ceramic raw material powder by further lowering the upper punch, pressing completion position of the upper punch Down to A step of obtain a ceramic molded body by Rukoto, characterized by comprising the step of firing the obtained the ceramic molded body.

According to the present invention, the powder press molding apparatus for molding a ceramic raw material powder, comprising a mold and a die and upper and lower punches, respectively provided with a through hole in the upper punch and lower punch insert the upper floating punch and under a floating punch, since the a tip portion of the upper floating punch and a lower floating punch was made to slide in close proximity, a plurality of openings are circumscribed in opposite directions to each other is apertured, Ru can be manufactured with easily mass production of ceramic forming the communication hole.

Furthermore, among the top and bottom floating punch, after filling the ceramic raw material powder inserted City, the spatial part in the space of the larger the dialog area of the distal end surface of the distal end portion, spatial portion and the other floating punch from what has been to insert into, the ceramic raw material powder in the space portion filled, for example, be moved largely by sliding the larger area of the front end surface of the heave punches, partial of ceramic raw material powder This is because the other floating punch is deformed with the movement to cause a problem of dimensional accuracy.

Further, a floating punch or the lower floating punch on that will be inserted after the sky The inter f, since the gap between the punch or the lower punch on which is disposed around it was 0.005～0.02Mm, the gap it is possible to prevent the sliding of the upper punch and the upper floating punch damage the bad mold by small, also contrary difficult gap setting of the upper floating punch and a lower floating punch by the gap is too large Can be prevented.

Further, by making the gap to slide proximate the front end portion of the upper floating punch and a lower floating punch and 0.01～0.03Mm, to prevent the occurrence of burrs in the ceramics produced by between gap, furthermore, possible to prevent the tip of the upper floating punch and a lower floating punch due gap is too small to damage in contact with each other.

Further, according to the manufacturing method of the ceramics of the present invention, are protruded inserting a portion of the lower punch in dialog, the distal end portion by inserting a part of the lower floating punch the through hole of the lower punch, a die, of the lower punch tip, Oyo the tip of the beauty under the floating punch forming a recess having a stepped with a step of filling the ceramic raw material powder in a concave portion, and the upper punch, the through-holes of the upper punch inserted the area of the distal end surface of the distal end portion is inserted and less than on the floating punch area under the floating punch dialog is lowered, a step of Ru slide in close proximity to the lower floating punch and the upper floating punch, upper a step of pressing the ceramic raw material powder by further lowering the punch, since it was to obtain a ceramic molded body by lowering the upper punch to press completion position, by suppressing the variation in molding density, high-precision Ceramic composition Runode can be obtained body, which an accurate ceramic mass productivity may be prepared and baked.

  Hereinafter, the best mode for carrying out the present invention will be described.

Figure 1 (a) ~ (c) is a longitudinal sectional view showing a more definitive formed shape Engineering powdered Suepu press forming apparatus of the present invention.

Mold the powder Suepu press forming apparatus 20 includes a die 1 having a space portion 2 having a substantially product shape, the upper punch 3 for pressurizing the ceramic raw material powder 10 filled in advance in the space portion 2, the lower a punch 4, further the respectively provided on the upper punch 3 and the lower punch 4 through holes 7 and 8, the floating punch 5 on to be inserted into the through hole 7 and 8, is provided with a lower floating punch 6.

Then, the feeder 9 for filling the ceramic raw material powder 10 in the space portion 2 of the die 1 to slide parallel to the dialog first upper surface is provided.

Incidentally, in FIG. 1 shows a cross-section of the mold portion of the powder press forming apparatus 20, but other parts are as not shown, a portion other than the mold powder powder press forming apparatus 20, as appropriate, general powder A press molding machine may be used, and an air or hydraulic cylinder may be used as a driving means for the upper floating punch 5.

The present invention is characterized in that the tip portions of the upper floating punch 5 and the lower floating punch 6 slide close to each other in the space portion 2 of the die 1.

That is, the present invention, the distal end portion of the upper floating punch 5 and the lower floating punch 6, since it was to slide in close proximity to each other, naturally, the ceramic material between the upper floating punch 5 and the lower floating punch 6 Since the partition wall formed by the powder 10 is not formed, it is possible to easily and inexpensively form a communication hole in which a plurality of apertures are circumscribed in a direction opposite to each other in the ceramic. is there.

And to allow such a molding, of an upper floating punch 5 and the lower floating punch 6, the larger the area of the front end portion of each previously inserted into the space portion 2 of the die 1, a small It is important to insert the ceramic material powder 10 into the ceramic material powder 10 after filling. That is, when as shown in FIG. 1, since near the top area of the front end surface of the floating punch 5 and the tip portion of the lower floating punch 6 is above the floating punch 5 is smaller than the lower floating punch 6, the upper float It is important to insert the punch 5 into the space 2 of the die 1 after filling the ceramic raw material powder 10.

This is because the ceramic raw material powder 10 is greatly moved by sliding only the lower floating punch 6 in the space portion 2 which is filled, ceramic raw material partial movement of the powder 10 is generated, the ceramic raw material powder 10 in order that This is because there is a problem in dimensional accuracy due to deformation of the upper floating punch 5 with the movement of.

  In order to make the gap between the upper floating punch 5 and the lower floating punch 6 close to each other in this way, the gap between the upper punch 3 and the upper floating punch 5 is made as small as possible so that the upper floating punch 5 does not wobble. The gap is preferably 0.005 to 0.02 mm, and more preferably 0.005 to 0.01 mm.

Is sliding is difficult for the upper punch 3 and the upper floating punch 5 when the gap to less than 0.005 mm, leading to breakage of the mold, the upper floating punch 5 and the lower floating punch 6 becomes greater than 0.02mm Care should be taken because it becomes difficult to set the gap.

The present invention, it is preferable that the gap be tip close slides the upper floating punch 5 and the lower floating punch 6 is 0.01 to 0.03 mm.

Here, while gap has to be 0.01 to 0.03 mm, when the gap the tip of the upper floating punch 5 and the lower floating punch 6 is slid in proximity is less than 0.01 mm, each other Ino tip cause problems lacking in contact, because burrs communication hole in the ceramic exceeds 0.03mm is likely to occur, because the worst case would be blocked communication holes.

The method of manufacturing a ceramic of the present invention is to insert a part of the lower punch in dialog, is projected to the distal end portion by inserting a part of the lower floating punch the through hole of the lower punch, a die, a lower punch tip, Oyo recess is formed having a stepped between under the floating punch tip beauty, after filling the ceramic raw material powder in the recess, and the upper punch, the tip is inserted into the through hole of the upper punch tip surface area was is lowered to insert the area Yorichiisai on the floating punch below the floating punch dialog of, after sliding in close proximity to the lower floating punch and the upper floating punch, by further lowering the upper punch The ceramic raw material powder is pressurized and the upper punch is lowered to the pressurization completion position to obtain a ceramic molded body, which is then sintered.

Here, a method for manufacturing the ceramic with powder powder press forming apparatus 20 of the present invention.

First, as shown in FIG. 1A, the die 1 and each punch are set, and the ceramic raw material powder 10 is filled in the space 2 by a feeder 9 that reciprocates on the upper surface of the die 1.

Next, (b), the lowering the upper punch 3 and the upper floating punch 5 is set so as to be slid in close proximity to the upper floating punch 5 and the lower floating punch 6. At this time, the upper floating punch 5 is disposed so as to protrude from the front end surface of the upper punch 3.

Thereafter, by lowering the upper punch 3 and the upper floating punch 5, to insert the upper punch 3 in the space portion 2 of the die 1 is gradually lowered along with lowering of the upper punch 3 and the upper floating punch 5 also underneath floating punch 6 Let

  Then, when the upper punch 3 comes to the point before the pressurization completion (before the bottom dead center) to compress the ceramic raw material powder 10, the upper punch 3 is lowered to the pressurization completion position (bottom dead center) to complete the molding. .

In this way, by moving the upper floating punch 5 and the lower floating punch 6 , the ceramic raw material powder 10 can be fluidized to improve the clogging of the ceramic raw material powder, so that the overall molding density can be approximated. it can.

Thereafter, as shown in FIG. 1 (c), along with raising the upper punch 3 and the upper floating punch 5, so that the take out the ceramic molded body 35 by raising the lower punch 4.

Thus, if press molding using a powder Suepu press forming device 20 of the present invention, FIG. 2 (a), the suppressed variations in molding density ceramic molded body having a shape (b), the accuracy of High ceramics can be mass-produced.

Then, by firing the ceramic molded body molded by the powder press molding apparatus 20 of the present invention at a desired temperature, the package 30 made of ceramics shown in FIGS. 2A and 2B can be produced without breakage. .

The ceramic produced in this way can also be used as a liquid or gas flow path member. For example, when an ink jet printer head is used as a flow path member, an ink jet printer head (hereinafter simply referred to as a head) includes an ink pressurizing chamber that pressurizes ink, a drive unit that pressurizes the ink pressurizing chamber, and the ink pressurizing chamber. Since the ink flow path for flowing ink into the chamber and the nozzle that pressurizes the ink pressurization chamber by the drive unit and discharges ink, the flow path member showing an example of the present invention is an ink flow path. Used as an ink storage chamber for supplying the ink flow path from the ink tank and the ink pressurizing chamber.

  When the flow path member using the powder press molding apparatus of the present invention is used for the head, a highly accurate flow path member can be produced at low cost.

Here, holder Lee 1 put the present invention, the lower punch 4, the lower floating punch 6, the upper punch 3, the shape of the upper floating punch 5, but the invention is not limited to the shape shown in the present invention, the ceramic the shape and may be appropriately selected and used in accordance with the position and shape of the communication hole, such as span it and range to increase the number of communication hole, further, integrating the upper punch 3 and the upper floating punch 5 and thereby, like adding core pin, not to mention it can also be applied to those improvements and modifications without departing from the scope of the present invention.

In addition, as an applicable molding method and press molding apparatus, it can be applied to any of a die fixed type single punch pressure molding method, a die fixed type double punch pressure molding method, a lower punch fixed type floating die molding method, and the like. is there. The type of press device may be mechanical or hydraulic, and is not limited.

In addition to ceramic raw material powders such as alumina, zirconia, aluminum nitride, mullite, steatite, forsterite, silicon nitride, silicon carbide, barium titanate dielectric materials, etc. Although described in terms of powder, it can also be applied to raw materials for various metal materials such as magnet alloy powder, and is included in the category.

  Next, examples of the present invention will be described.

To produce a ceramic raw material powder 10 by adding additives to the alumina powder raw material, provided with a die having a die 1 and the upper punch 3 and the lower punch 4, through the upper punch 3 and lower punch 4 hole 7 , subjected to molding using a powder press molding apparatus 20 for inserting each on the floating punch 5 and under the floating punch 6 provided 8, the tip of the upper floating punch 5 and the lower floating punch 6 is slid in proximity It was. At this time, by setting the gap between the upper punch 3 and the upper floating punch 5 in the range of 0.005～0.01Mm, a gap tip slides in proximity of the upper floating punch 5 and the lower floating punch 6 0 Molding was performed with the settings of 0.005 mm, 0.01 mm, 0.03 mm, and 0.035 mm.

As a result , when the gap between which the tip of the upper floating punch 5 and the lower floating punch 6 slides close to each other is set to 0.005 mm , the tip of the upper floating punch 5 and the lower floating punch 6 come into contact with each other and chipping occurs. It occurs, those of 0.035mm Bali between gap was remaining unavailable.

Both lacked the distal end of the upper floating punch 5 and the lower floating punch 6 is not generated, and generation of burrs in the gap is good not observed what this gap between 0.01mm and 0.03mm there were.

These molded bodies were fired at 1600 ° C. to obtain ceramics. Then, was observed them in binocular microscope, no such particular projection by cracks and burrs, the flow path member, especially
It was also ready for use without any problem by using such as the F head on.

The present invention can be used in the field of a package in which electronic components are mounted, a flow path member such as gas or liquid, or a joint.

(A) ~ (c) is a longitudinal sectional view for explaining a molding process in powder Suepu press forming apparatus of the present invention. The package fabricated using the powder Suepu press forming apparatus of the present invention shows, (a) is a perspective view, a sectional view taken along line X-X of (b) is (a). Shows the prepared packages using conventional powder press forming apparatus, (a) is a perspective view of a package, a cross-sectional view taken along Y -Y line (b) is (a). (A) ~ (c) is a longitudinal sectional view showing a molding step of the conventional flour Suepu press forming apparatus.

1, 41: Die 2, 42: Space 3, 43: Upper punch 4, 44: Lower punch 5: Upper floating punch 6, 47: Lower floating punch 7: Through hole 8: Through hole 9, 45: Feeder 10, 46: ceramic raw material powder 20 and 40: powder Suepu press forming apparatus 30, 50: package 31a: space 32 b: space 31c: space inside surface 32d: space inside surface 35, 55: ceramic body 51: space 52 : Bulkhead

Claims (5)

In powder press molding apparatus for molding a ceramic raw material powder, die and the upper punch and provided with a mold having a lower punch, respectively on the floating punch is provided a through hole in the upper punch and the lower punch Oyo insert the beauty under floating punch, powder press molding apparatus wherein the tip of said lower floating punch and the upper floating punch was made to slide in close proximity. Wherein among the heave punches, inserted City space of the die the greater the area of the distal end surface of the distal end portion, the front Symbol space after filling the ceramic raw material powder, the other floating punch into the space 2. The powder press molding apparatus according to claim 1, wherein the powder press molding apparatus is inserted. It gap before and the upper floating punch or the lower floating punch that is inserted after Kisora The inter f, and the upper punch or the lower punch, which is disposed around is 0.005~0.02mm The powder press molding apparatus according to claim 2. Powder press forming apparatus according to any one of claims 1 to 3 gaps tip of the lower floating punch and the upper floating punch is slid in proximity to being a 0.01~0.03mm . Using powder press forming apparatus according to any one of claims 1 to 4, comprising the steps of inserting a portion of the lower punch to the die, a part of the lower floating punch into the through hole of the pre-Symbol lower punch inserted by protruding the distal end portion of the die, the tip of the lower punch, forming a recess having a stepped at the tip portion of and said lower floating punch, a ceramic raw material powder into the recess a step of filling, and the upper punch, by inserting the said tip of the distal end surface area area smaller than the upper floating punch of the lower floating punch inserted into the through hole of the upper punch into the die drops is a step of Ru slide in close proximity to said on floating punch and the lower floating punch, a step of pressing the ceramic raw material powder by further lowering the upper punch, the upper punch to press completion position By lowering Method of manufacturing a ceramic, characterized by comprising: a ceramic molded body obtained Ru step, and a step of firing the obtained the ceramic molded body.

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