JP4773230B2 - Cutting device for ceramic honeycomb molded body - Google Patents

Description

The present invention is a ceramic honeycomb formed body, to disconnect apparatus of the ceramic honeycomb formed body for cutting substantially at right angles to the direction of the through hole.

  A ceramic honeycomb structure used as a dust collection filter, an exhaust gas purification catalyst carrier, etc. is formed by forming a clay containing ceramic powder into a honeycomb shape, cutting the formed body into an appropriate length, and then drying and firing. Manufactured by. Accordingly, there is a need for means for cutting a ceramic honeycomb molded body that is soft and easily deformed without affecting the shape. Conventionally, as such means, as shown in FIG. A method of cutting the thin wire 2 by applying tension to the thin wire 2 with a spring 3 and reciprocating the thin wire 2 in its length direction, as shown in FIG. 7, bobbins 8 provided on two servo motors 7 While adjusting the torque of the servomotor 7 to give an appropriate tension to the thin wire 2 between them, the thin wire 2 is run in the process of winding the thin wire 2 around one bobbin 8 by the rotation of the servo motor 7 and cut. The method to do has been performed.

  However, in the above method, since the thin wire 2 is cut while moving in the length direction, the load in the moving direction of the thin wire 2 is applied to the workpiece due to the resistance when cutting the thick outer periphery of the ceramic honeycomb formed body 5. As a result, the ceramic honeycomb formed body 5 is distorted. In particular, since the partition wall of the honeycomb structure is in the direction of becoming thinner from the conventional 150 μm to 50 to 125 μm or less in recent years, the aperture ratio of the honeycomb structure cross section is increased, and the strength of the honeycomb molded body is increased. The problem of distortion due to cutting is more serious because of the smaller.

  Further, not only the distortion of the whole honeycomb formed body but also the partition walls of the honeycomb structure are deformed and crushed by a downward load at the time of cutting. In order to avoid this phenomenon, the cutting may be performed more slowly, but the cutting efficiency is reduced.

  Also, since the thin wire is cut while moving in the length direction, the life of the thin wire is short and the thin wire must be replaced frequently. However, it is necessary to adjust the tension each time the thin wire is replaced. The cutting efficiency of the body was remarkably impaired.

Accordingly, in view of the above situation, the present applicant has provided a cutting guide groove on the outer periphery of the ceramic honeycomb molded body, and a cutting method for cutting the ceramic honeycomb molded body only by applying a fine line to the ceramic honeycomb molded body and pressing it on the ceramic honeycomb molded body (Refer to Patent Document 1). This cutting method is a preferable method in that the ceramic honeycomb formed body having thin partition walls can be cut without causing distortion, but there is a demand for further improving the cutting efficiency.
That is, in the conventional cutting method, the fine wire is usually lowered from the top to the bottom to cut the ceramic honeycomb formed body. In this case, the fine wire is cut into the ceramic in order to cut the ceramic honeycomb formed body again after cutting. It is necessary to return to the cutting start position above the honeycomb formed body. Therefore, when continuously cutting the ceramic honeycomb formed body, the thin wire return time has hindered improvement in cutting efficiency. Moreover, this has become a big bottleneck when trying to improve the cutting efficiency by increasing the extrusion speed of the ceramic honeycomb formed body.
JP 2001-96524 A

The present invention has been made in view of such a situation, and the object of the present invention is to improve the cutting efficiency more than before without causing distortion in the ceramic honeycomb formed body, so that the return time of the fine wire is almost the same. and to provide a disconnect device of the ceramic honeycomb formed body can be without.

That is , according to the present invention, the ceramic honeycomb formed body is placed in a state where the direction of the through-hole is horizontal, and the cradle that moves at a predetermined speed in the through-hole direction, on both sides of the ceramic honeycomb formed body. A frame that includes a first arm portion and a second arm portion that are disposed and moves in the same direction at the same speed as the ceramic honeycomb molded body while holding an upper and lower bobbin that stretches a thin wire with an appropriate tension; and the frame body Are connected to the upper portions of the first arm portion and the second arm portion so as to straddle the upper side of the ceramic honeycomb formed body, and the upper bobbin of the upper and lower bobbins is reciprocated in the lateral direction. A ceramic provided with a guide rail for moving, and a first rod-like body and a second rod-like body, which are installed at the lower portions of the first arm portion and the second arm portion, and can reciprocate horizontally. Honeycomb forming The first rod-like body and the second rod-like body move in the horizontal direction and deliver the lower bobbin at a lower side portion of the ceramic honeycomb formed body, whereby the upper and lower bobbins There is provided a cutting device for a ceramic honeycomb formed body, which moves a thin wire stretched in the lateral direction to cut the ceramic honeycomb formed body.

  In the above, a fitting portion for fitting the lower bobbin is provided at the tip of each of the first rod-shaped body and the second rod-shaped body, and the lower portion of the ceramic honeycomb molded body has the lower portion. It is preferable that the bobbin is delivered.

According to disconnect apparatus of the present invention, without distortion to the ceramic honeycomb formed body, it exhibits a remarkable effect that it is possible than before raising the cutting speed.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. However, the present invention should not be construed as being limited thereto, and various modifications, modifications, Modifications and improvements can be added.

Figure 1 (a) ~ FIG. 1 (d) schematically shows an embodiment of the engagement Ru disconnect device in the present invention. Reference numeral 10 denotes a ceramic honeycomb formed body, and the ceramic honeycomb formed body 10 is placed on a receiving base 11 that moves at a predetermined speed in the through hole direction with the through hole direction set in the horizontal direction. As shown in FIG. 2, a through hole 20 is formed in the transverse direction at the lower part of the cradle 11. As will be described later, the inside of the through hole 20 is formed with a first rod-like body 17 a and a second rod-like body. The body 17b reciprocates and delivers the lower bobbin 14b. On both sides of the ceramic honeycomb molded body 10, a frame body 15 having a first arm portion 12a and a second arm portion 12b is disposed, and holds upper and lower bobbins 14a and 14b for stretching the thin wire 13 with an appropriate tension. However, the ceramic honeycomb formed body 10 moves in the same direction at the same speed.

  A guide rail 16 is provided on each of the upper portions of the first arm portion 12a and the second arm portion 12b so as to connect them to form a part of the frame body 15 and straddle the upper side of the ceramic honeycomb formed body 10. The upper bobbin 14a of the upper and lower bobbins 14a and 14b is reciprocated in the horizontal direction. And the 1st rod-shaped body 17a and the 2nd rod-shaped body 17b are installed in each lower part of the 1st arm part 12a and the 2nd arm part 12b, and it is comprised so that a reciprocation is possible in a horizontal direction. . As described above, the cutting apparatus of the present invention includes the receiving base 11 on which the ceramic honeycomb molded body 10 is placed, the frame body 15, the guide rail 16, and the first rod-shaped body 17a and the second rod-shaped body 17b. It is.

  In the cutting device of the present invention, the first rod-like body 17a and the second rod-like body 17b move in the horizontal direction and deliver the lower bobbin 14b at the lower side portion of the ceramic honeycomb molded body 10 to move up and down. The fine wire 13 stretched between the bobbins 14a and 14b is moved in the lateral direction, and the ceramic honeycomb formed body 10 is cut.

  In the above case, the respective distal end portions of the first rod-like body 17a and the second rod-like body 17b have a fitting structure (for example, a structure as shown in FIG. 3 or FIG. 4) capable of fitting the lower bobbin 14b. Yes, will be described later). As shown in FIG. 1 (a), the lower bobbin 14b is fitted to the tip of the first rod-shaped body 17a, and the lateral direction (from the lower part of the first arm 12a toward the second rod-shaped body 17b ( On the other hand, the second rod-like body 17b simultaneously moves laterally (leftward in the drawing) from the lower part of the second arm portion 12b toward the first rod-like body 17a. At that time, the upper bobbin 14a moves on the guide rail 16 in the direction of the second arm portion 12b in conjunction with the lower bobbin 14b, and the thin line 13 stretched between the upper and lower bobbins 14a, 14b is in the horizontal direction (in the figure). Move to the right). And as shown in FIG.1 (b), in the substantially center part of the lower part of the ceramic honeycomb molded object 10, the front-end | tip part of the 1st rod-shaped body 17a and the front-end | tip part of the 2nd rod-shaped body 17b contact | abut. Thus, delivery of the lower bobbin 14b is performed.

Next, as shown in FIG. 1 (c), the lower bobbin 14b delivered to the tip of the second rod-shaped body 17b is linked with the upper bobbin 14a and further moves on the guide rail 16 in the direction of the second arm 12b. The fine wire 13 stretched between the upper and lower bobbins 14a, 14b further moves in the lateral direction ( right direction in the figure), thereby cutting the ceramic honeycomb formed body 10 in the lateral direction. Then, as shown in FIG. 1D, the lower bobbin 14b delivered to the tip of the second rod-like body 17b reaches the lower part of the second arm portion 12b and stops. The first rod-like body 17a that has delivered the lower bobbin 14b to the tip end portion of the second rod-like body 17b is then, as shown in FIG. 1 (c), the tip portion thereof being a lower part of the first arm portion 12a. Return to.

  Further, as described above, the fine wire 13 stretched between the upper and lower bobbins 14a and 14b moves to the right in the drawing from the state shown in FIG. 1 (a) to the state shown in FIG. The body 10 is cut in the lateral direction, and thereafter, the fine wire 13 stretched between the upper and lower bobbins 14a and 14b moves to the left in the figure [from FIG. 1 (d) to FIG. 1 (b) and move to the state of FIG. 1 (a). Thus, the ceramic honeycomb formed body 10 is cut in the transverse direction in the opposite direction. In the present invention, the thin wire 13 stretched between the upper and lower bobbins 14a and 14b repeats this moving operation (reciprocating movement), thereby making it possible to return the thin wire as compared with the conventional method of cutting from top to bottom. It is possible to cut the ceramic honeycomb formed body 10 in the lateral direction by greatly reducing the time required for the above.

  FIG. 3 shows an example of a fitting structure in which the distal ends of the first rod-like body 17a and the second rod-like body 17b are fitted with the lower bobbin 14b. In this example, the fitting portion has a double sleeve structure, and projecting pins 32a and 32b with springs are provided at the respective tip portions of the first rod-like body 17a and the second rod-like body 17b. On the other hand, the inside of the lower bobbin 14b has a pin accommodating groove 34. When the lower bobbin 14b is moved (delivered), the outer sleeve 30 pushes the lower bobbin 14b leftward in the figure, so that the lower bobbin 14b is separated from the tip of the second rod-shaped body 17b and the first rod-shaped body 17a. The lower bobbin 14b is fixed by being moved (delivered) to the front end of the first rod-shaped body 17a and the spring-loaded protruding pin 32a provided at the front end of the first rod-like body 17a protruding into the pin receiving groove 34 of the lower bobbin 14b. .

  FIG. 4 shows another example of a fitting structure in which the respective leading ends of the first rod-like body 17a and the second rod-like body 17b are fitted to the lower bobbin 14b. In this example, the fitting portion has a double sleeve structure, and screws 44a and 44b are formed at the tip ends of the first rod-like body 17a and the second rod-like body 17b, respectively, while the lower bobbin Corresponding screws 42 are also formed inside 14b. When the lower bobbin 14b is moved (delivered), the first rod-like body 17a and the second rod-like body 17b rotate, so that the lower bobbin 14b moves to the left in the figure, and the second rod-like body It moves away (transfers) from the tip end portion of 17b to the tip end portion of the first rod-like body 17a. At that time, the outer sleeve 40 is provided with a locking piece 46 so that the lower bobbin 14b does not rotate with the rotation of the first rod-like body 17a and the second rod-like body 17b. By engaging with the bobbin 14b, the lower bobbin 14b is fixed without rotating.

  FIG. 5 shows the movement operation (reciprocating movement) of the thin wire 13 from the state shown in FIG. 1A to FIG. 1D and the reverse state of FIG. 1D to FIG. 1A. In the plan view shown, the ceramic honeycomb molded body 10 mounted on the cradle 11 is reciprocated in the direction of the arrow with respect to the ceramic honeycomb molded body 10 moving at a predetermined speed in the left direction in the figure. 10 is cut transversely.

  In the present invention, the fine wire 13 is reciprocated in the horizontal direction to cut the ceramic honeycomb formed body in the horizontal direction. The return operation of returning and cutting in the vertical direction can be omitted, and the cutting time can be greatly shortened.

  In the present invention, there is no particular limitation on the material of the thin wire, as long as it can suitably cut the ceramic honeycomb molded body, piano wire, steel wire, synthetic resin fiber, fiber wire such as carbon fiber, or diamond coating, A thin wire or the like in which small particles are scattered can be suitably used. Moreover, it is preferable that the diameter of a thin wire | line is 20-100 micrometers.

  In the present invention, in order to cut the ceramic honeycomb formed body 10 using the fine wires 13, it is usually preferable to move the fine wires 13 in the lateral direction at a speed of 250 mm / second or less. This is because if it exceeds 250 mm / sec, the cell structure may be deformed and crushed due to the thickness of the partition wall.

Further, no particular limitation on the shape of the end face of the ceramic honeycomb formed body for cutting by switching DanSo location of the present invention, the ceramic honeycomb formed with circular, oval, square, triangular, pentagonal, the end surfaces of various shapes such as hexagonal The body can be cut appropriately.

  EXAMPLES Hereinafter, although this invention is demonstrated in more detail using an Example and a comparative example, this invention is not limited to these Examples.

(Comparative example)
The ceramic honeycomb formed body was cut by pressing the fine wire in the vertical direction (from top to bottom). After cutting, the fine wire was returned to the top (raised), and the ceramic honeycomb formed body was cut again. As a result, the waiting time that did not contribute to cutting was 8.1 seconds. The ceramic honeycomb molded body used had a round end shape of 111.0 mm in diameter, a partition wall thickness of 120 μm, a cell pitch of 1.40 mm, and an outer peripheral thickness of 0.50 mm. The extrusion rate of the body was 39 mm / sec. The fine wire made of steel with a diameter of 0.070 mm was used. Cutting was performed by moving the thin wire downward at a speed of 200 mm / sec.

(Example)
As shown in FIGS. 1 (a) to 1 (d), the ceramic honeycomb formed body extruded in the same shape as the comparative example and at the same extrusion speed was cut by reciprocating the fine wire 13 in the horizontal direction. As a result, the waiting time not contributing to cutting was 5.1 seconds.
Thus, as in the present invention, by cutting the ceramic honeycomb formed body by reciprocating in the lateral direction, cutting time of about 3 seconds is achieved as compared with the conventional longitudinal cutting. I was able to.
Further, when the distortion (roundness) of the ceramic honeycomb molded body after cutting was measured, almost no distortion occurred.

According to the switching DanSo location of the present invention, the ceramic honeycomb formed body having a thin partition wall, it is possible to cut without distortion, it is possible to greatly shorten the cutting time, it improved significantly cutting efficiency Can be made. Therefore, by drying and firing the obtained ceramic honeycomb molded body, a ceramic honeycomb structure used as a dust collection filter, an exhaust gas purifying catalyst carrier and the like can be efficiently manufactured, which is extremely useful in industry.

In explanatory view showing an embodiment of a switching DanSo location according to the present invention schematically shows (a) before the start cutting, (b) and (c) cutting an intermediate stage, (d) the time slicing end However, in the case of reciprocal movement in the reverse direction, (d) shows before the start of cutting and (a) shows the end of cutting. It is explanatory drawing which looked at the cutting device concerning the present invention from the side. It is sectional explanatory drawing which shows an example of the fitting structure used for this invention. It is sectional explanatory drawing which shows the other example of the fitting structure used for this invention. It is explanatory drawing which looked at the movement (reciprocating movement) of the thin wire | line in this invention from the top. It is explanatory drawing which shows an example of the conventional cutting method. It is explanatory drawing which shows the other example of the cutting method in the past.

Explanation of symbols

1: pulley, 2: fine wire, 3: spring, 7: servo motor, 8: bobbin, 10: ceramic honeycomb molded body, 11: cradle, 12a: first arm portion, 12b: second arm portion, 13: fine wire 14a: upper bobbin, 14b: lower bobbin, 15: frame body, 16: guide rail, 17a: first rod-shaped body, 17b: second rod-shaped body, 20: through hole, 30: outer sleeve, 32a, 32b : Protruding pin with spring, 34: pin receiving groove, 40: outer sleeve, 42: screw, 44a, 44b: screw, 46: locking piece.

Claims (2)

A cradle that moves the ceramic honeycomb formed body at a predetermined speed in the direction of the through-hole while placing the ceramic honeycomb molded body in a state in which the direction of the through-hole is horizontal.
The first and second arm portions are arranged on both sides of the ceramic honeycomb formed body and move in the same direction at the same speed as the ceramic honeycomb formed body while holding the upper and lower bobbins that stretch the thin wire with an appropriate tension. A frame to perform,
A part of the frame body is formed, the upper portions of the first arm portion and the second arm portion are connected so as to straddle the upper side of the ceramic honeycomb formed body, and the upper bobbin of the upper and lower bobbins is laterally A guide rail for reciprocating in the direction,
A cutting apparatus for a ceramic honeycomb molded body, comprising a first rod-like body and a second rod-like body, which are installed under each of the first arm portion and the second arm portion and are capable of reciprocating in the horizontal direction. And
The first rod-like body and the second rod-like body move in the horizontal direction and deliver the lower bobbin at the lower side portion of the ceramic honeycomb formed body, thereby forming a thin wire stretched between the upper and lower bobbins. An apparatus for cutting a ceramic honeycomb formed body, which moves in the lateral direction and cuts the ceramic honeycomb formed body. A fitting portion for fitting the lower bobbin is provided at the tip of each of the first rod-like body and the second rod-like body, and the lower bobbin is delivered at the lower portion of the ceramic honeycomb formed body. The apparatus for cutting a ceramic honeycomb molded body according to claim 1 .

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