JPH0217846Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a press apparatus for forming a perforated ceramic body, which is used to mold a perforated ceramic body having a large number of small holes.

(Prior art) In order to mold ceramic bodies with many regular small holes used for burner plates of gas burners, etc., welding a large number of metal pins to the metal plate, solder, lead, resin, etc. A pin mold with a pin shape fixed by a screw or the like is used, and the pin mold is pressed onto a ceramic body that has been formed into a plate shape in advance to make holes, or holes are made in a predetermined array using a small diameter drill. method has been adopted. However, with such pin molds, even if one of the many pins becomes bent or broken, it is not easy to repair, and the molded product tends to collapse when the pin mold is removed. When machining with a machine, there were problems such as damage to the drill, irregularities in small holes, and an increase in the number of machining steps.

(Problems that the invention attempts to solve) This invention solves these conventional problems,
It was completed with the aim of creating a press machine for forming perforated ceramic bodies made of ceramic particles, which is extremely easy to repair broken, bent, or worn pins, and which does not lose its shape when the pin mold is removed from the molded product. It is something.

(Means for Solving the Problems) The present invention has a number of metal pins each having a flange formed at the lower end thereof, which protrudes upward from pin insertion holes formed through the upper plate, and the flanges are connected to the upper plate. It is characterized by having a pin shape shaped like a crest, which is pressed and fixed between the two.

(Embodiment) Next, the present invention will be explained in detail with reference to the illustrated embodiment. In Fig. 1, 1 is a press frame;
3 is a frame provided at the center of the press frame; 3 is a lower punch table which is raised and lowered by a cylinder 5 while being guided by a guide 4; 4 is an upper punch table provided at the top of the press frame 1; It is moved up and down by the cylinder 8 while being guided by the cylinder 8.
A molding hole 9 corresponding to the outer diameter of the perforated ceramic body to be molded is formed in the frame 2, and a lower punch 10 and an upper punch 11 each have an outer diameter that can fit into the molding hole 9. It is attached to the lower punch stand 3 and the upper punch stand 6. In addition, the lower punch table 3
At the top, a pin mold 13 is provided which can be moved up and down inside the lower punch 10 by a pin up and down cylinder 12.

As shown in FIG. 2, the pin mold 13 includes a large number of pins 15 each having a flange 14 formed at the lower end, an upper plate 17 having pin insertion holes 16 formed in a predetermined pattern, and a pin mold upper and lower cylinder 12. A lower plate 19 is fixed to the upper end of a piston rod 18, and these pins 15 are fixed to an upper plate 17.
The pin insertion hole 16 is made to protrude upward from the lower surface of the pin insertion hole 16, and the flange 14 of each pin 15 is fixed by being pressed between the upper plate 17 and the lower plate 19 to form a pin shape 13. It is. Further, depending on the size of the hole, it is possible to use a commercially available nail for the pin 15, and there is no need to specially manufacture the pin by rolling or the like, and the cost of the pin type can be reduced.
The tip or the entire pin 15 may be tapered, and the pins 15 at the four corners have their bases made thicker as shown in the figure, and threads 22 are cut, and the pins 15 are inserted into the upper plate 17 through the drill holes 23 in the lower plate 19. It can be screwed into the screw hole 24 of , and can also serve as a bolt for fixing the upper plate 17 and the lower plate 19. The lower punch 10 and the upper punch 11 have pin insertion holes 20 and 21 arranged in a manner corresponding to the arrangement of the pins of the pin mold 13.
are each transparent. The entire press frame 1 is installed on a vibrator (not shown) in order to uniformly fill the pin mold 13 when ceramic raw materials with low fluidity are used, so that vibration molding can be performed. It is being done. In addition, if an elastic material such as rubber is used for the upper plate 17 of the pin mold 13, the pin insertion holes 20 and 21 in an arrangement corresponding to the hole arrangement in the upper plate 17 of the pin mold 13 can be easily pinned even if there is a slight misalignment. 15 is inserted, and when the vibrator is installed, the vibration will cause 15 and the pin insertion hole 20,
It has been confirmed that damage to the pin 15 can be alleviated even if the fitting of the pin 21 becomes tight.

(Function) As shown in FIG. 3, with this structure, the lower punch 10 is first raised to the lower end of the forming hole 9 of the frame 2, and then the lower punch 10 is generally inserted into the forming hole 9.
The particle size obtained by firing at a temperature of 1000℃ or higher is 10~
A ceramic raw material made by adding a glassy glaze as a binder to ceramic particles of 3000 μm is supplied, and then the pin mold 13 is transferred to the pin mold upper and lower cylinders 12.
The lower punch 10 is moved up and down through the pin insertion hole 20 to uniformly disperse the ceramic raw material. At this time, if vibration is applied by a vibrator, the ceramic raw material can be uniformly dispersed in the gaps between the pins 15 of the pin mold 13. Next, the upper punch 11 is moved up and down while the pin mold 13 is raised to the position shown by the imaginary line in FIG. A perforated ceramic body is formed between the lower punch 10 and the lower punch 10. At this time, the tip of the pin 15 fits into the pin insertion hole 21 of the upper punch 11, so that a perforated ceramic body having a perfect hole shape can be formed. Thereafter, with the molded product sandwiched between the upper punch 11 and the lower punch 10, lift the upper punch 11 and the lower punch 10 upward from the molding hole 9 of the frame 2 as shown in FIG. If only the pin 15 is lowered, it will not lose its shape.
can be removed, and the molded product can then be taken out.

As described above, the device of the present invention uses the pin mold 13 to mold a perforated ceramic body.
Similar to the conventional pin type, some of the many pins 15 may break, bend, or wear out. However, in the pin type 13 of the present invention, a pin 15 having a flange 14 at the lower end is fixed by sandwiching each flange 14 between an upper plate 17 and a lower plate 19 with pin insertion holes 16. By separating the upper plate 17 and the lower plate 19, there is an advantage that only the broken, bent, or worn pins 15 out of the many pins 15 can be easily replaced. In addition, by appropriately changing the pitch of the pins, it is possible to easily convert to a pin type 13 with a different pin arrangement.Furthermore, by appropriately changing the diameter of the pins 15, the diameter of the through hole can be adjusted to about 0.5 to 5 mm. Therefore, various porous ceramic bodies can be molded using a small number of pin molds. Further, by adjusting the height of the pin-type vertical cylinder 12 and aligning the tip of the pin 15 with the insertion hole 20 of the lower punch, it can also be used for molding a ceramic body without holes.

(Effects of the invention) As is clear from the above explanation, the present invention makes it extremely easy to repair broken, bent, or worn pins, and allows the pin arrangement to be changed freely. , it is possible to mold a porous ceramic body having a perfect pore shape without causing the molded product to lose its shape. Furthermore, the present invention allows the thickness and packing density of the perforated ceramic body to be changed arbitrarily by changing the filling amount of the ceramic raw material, the pressing pressure, and the height of the pin mold. It can also be shaped into a body. Therefore, the present invention is suitable for molding various types of perforated ceramic bodies, including burner plates, and has extremely great practical value.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway perspective view of the pin-shaped part, and Fig. 3
FIG. 4 is a cross-sectional view of the main part to explain the molding state. 13: Pin type, 14: Flange, 15: Pin,
16: Pin insertion hole, 17: Upper plate, 19: Lower plate.

Claims (1)

[Scope of utility model registration request] A number of metal pins 15 each having a flange 14 formed at the lower end are inserted through the pin insertion hole 1 in the upper plate 17.
For molding a perforated ceramic body, the pin mold 13 has a pin shape 13 projecting upward from the flange 14 of the pin mold 13 and having a flange 14 clamped and fixed between an upper plate 17 and a lower plate 19. Press equipment.