JP2009154482A - Mold washing method and mold washing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold washing method which can surely remove contamination incapable of being removed by a high pressure water washing process or an oscillating ultrasonic cleaning process, and also surely clean even a metallic mold of a complicated shape having a number of projecting/recessed parts, through-holes, or the like in addition to metallic molds of simple shapes. <P>SOLUTION: The mold washing apparatus 10 includes: a vessel 12; a basket 14 installed in the vessel 12; a cleaning liquid 16 injected in the vessel 12; a number of beads 18 stored in the basket 14; a first basket 22A for holding a first metallic mold 20A; a second basket 22B for holding a second metallic mold 20B; a first and a second vertical moving mechanism 24A, 24B that put the first and the second basket 22A, 22B in and out of the cleaning liquid 16 containing the beads 18 in the vessel 12; and a first and a second oscillation mechanism 26A, 26B that oscillate the first and the second basket 22A, 22B inserted in the cleaning liquid 16 containing the beads 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mold cleaning method and a mold cleaning apparatus for removing residues (dirt) attached to a mold using beads.

  In general, the ceramic molded products to be produced have simple and complex shapes and structures, thin and thick, and high and low dimensional accuracy due to the required molded product characteristics. Everything is different. When manufacturing these molded products, the ceramic molded body can be formed with high dimensional accuracy in the mold, and any damage can be caused from the mold inside the mold, regardless of which molding method is used. It is important that the mold can be easily released. In order to cope with these matters, it is necessary to give sufficient consideration to molding raw materials, molds and the like on the premise that an accurate molding method is adopted. Further, when the molded part has a special shape or structure, these considerations become even more important.

  When a molded product has a complicated shape or structure, depending on the degree of complexity of the shape or structure, it may be difficult to form a molded body with a normal mold using normal molding raw materials. It is difficult to release from the mold, the dimensional accuracy of the shape and structure is lowered, it is difficult to densify the molded body, and cracks may occur in the case of a thick molded body. There are problems such as being.

  As one means for dealing with these problems, it is known to employ a gel cast method which is one method of a casting method. For example, Patent Document 1 discloses a gel casting method in consideration of a molding slurry that is a molding raw material.

  The gel casting method uses a molding slurry containing a raw material powder that is a ceramic powder, a metal powder, or a mixed powder of these two powders, a dispersion medium, and a gelling agent as a molding raw material. In this method, after the slurry is poured into a mold, the molding slurry is held and cured at a predetermined temperature in the presence of a crosslinking agent to form a ceramic molded body. In the gel casting method, a molding slurry having a high fluidity before curing is injected into a mold, so that it is easy to form a molded body having a complicated shape or structure, and the formed ceramic molding. The body has significant advantages such as having sufficient strength to withstand handling by curing of the molding slurry.

  However, residues (dirt) such as a lump of alumina, a release agent wax, a urethane coating, and the like adhere to the mold for forming the ceramic molded body as described above.

  Conventionally, high-pressure water cleaning and oscillating ultrasonic cleaning have been performed as methods for removing (cleaning) these stains. The alumina lump can be removed by high-pressure water washing or rocking ultrasonic washing, but the release agent wax or urethane coating cannot be removed.

  In particular, the contamination of the urethane coating has a problem that it adheres to and accumulates on the mold surface with the number of times the mold is used, resulting in defective release of the product (ceramic molded body) and adhesion of molding slurry to the mold surface. is there.

  Therefore, for example, cleaning methods according to Patent Documents 2 to 5 are conceivable.

  In the technique described in Patent Document 2, a mold to which deposits adhere is placed on a heating device such as a hot plate heater, and the dry ice pellets obtained by pulverizing the dry ice pellets are controlled by a carrier gas by controlling the heating temperature. This is a method of removing or cleaning deposits adhering to the mold by spraying or blasting.

  The technology described in Patent Document 3 is a hard carbon coated directly on the surface of a high-speed tool steel or cemented carbide base material or on a ceramic hard film such as TiN, TiCN, TiC, or TiAlN. This is a method for removing a hard carbon coating film by spraying fine hard powder together with air onto the coating film.

  The technique described in Patent Document 4 is based on the following: a projection material having a particle size of 100 to 3000 μm obtained by blending at least one of an inorganic filler, an organic filler, and an antistatic material with a urea resin; This is a method in which the adhesion and residual substances on the mold surface are instantaneously removed and washed by spraying with a gas flow on the surface of the mold together with the gas flow.

  The technique described in Patent Document 5 is a method in which a used molding die is embedded in resin fine particles immersed in an aqueous surfactant solution, and the molding die is cleaned by ultrasonic irradiation.

JP 2001-335371 A JP 2006-297705 A JP 2003-200350 A JP 2002-36252 A JP-A-8-155968

  As described above, the method described in Patent Document 2 cleans the mold by spraying dry ice particles toward the deposit of the mold, and the method described in Patent Document 3 uses hard powder to mold the mold. The mold is cleaned by spraying it with air on the surface of the mold, and the method described in Patent Document 4 is to spray a projection material having a particle size of 100 to 3000 μm along with a gas flow onto the surface of the mold to clean the mold. In the method described in No. 5, a mold is embedded in resin fine particles immersed in an aqueous surfactant solution and washed by irradiating with ultrasonic waves.

  These technologies described in Patent Documents 2 to 5 are effective for cleaning a mold having a simple shape such as a flat plate, but cleaning a mold having a complicated shape having a large number of irregularities and through-holes is not possible. Have difficulty. This is because it is difficult to insert dry ice grains, hard powder, projection material, resin particles into the through-holes, and unevenness is deformed by collision of dry ice grains, hard powder, projection material, etc. Because there is a problem.

  The present invention has been made in consideration of such problems, and can reliably remove residues (dirt) that cannot be removed by high-pressure water cleaning or oscillating ultrasonic cleaning, and has a large number of irregularities and through holes. It is an object of the present invention to provide a mold cleaning method and a mold cleaning apparatus that are effective for cleaning complex-shaped molds.

  The mold cleaning method according to the first aspect of the present invention is a mold cleaning method for removing residues adhering to a mold, and a charging step of charging beads and a cleaning liquid permeable to the residues into a container; A mold insertion step of inserting the mold into the cleaning liquid containing the beads put into the container, and a swinging step of swinging the mold inserted into the cleaning liquid including the beads; Removing the mold from the cleaning liquid containing the beads.

  This makes it possible to reliably remove residues (dirt) that cannot be removed by high-pressure water cleaning or oscillating ultrasonic cleaning, and in addition to simple-shaped molds, complex-shaped molds that have a large number of irregularities and through-holes. Even if it exists, it can wash | clean reliably.

  And in 1st this invention, it is preferable that the specific gravity of the said bead is larger than the specific gravity of the said washing | cleaning liquid.

  In the first aspect of the present invention, the residue may include at least urethane.

  In the first aspect of the present invention, the residue may include urethane and a release agent wax, and the cleaning agent may include a hydrocarbon solvent.

  In the first aspect of the present invention, the beads are preferably made of a material that is not corroded by the cleaning liquid.

  The first aspect of the present invention may further include a step of increasing the amount of the cleaning liquid in the container when the mold is inserted into the cleaning liquid containing at least the beads.

  The first aspect of the present invention may further include a step of adjusting the amount of the cleaning liquid in the container when the mold is completely inserted into the cleaning liquid containing the beads.

  The first aspect of the present invention may further include a step of increasing the amount of the cleaning liquid in the container when taking out the mold from the cleaning liquid containing the beads.

  In the first aspect of the present invention, when the amount of the cleaning liquid in the container is increased, the cleaning liquid may be fluidly circulated along with it.

  Further, in the first aspect of the present invention, in the charging step, the cleaning liquid is charged in accordance with whether the beads are contained in the container, and the opening diameter of the basket is smaller than the size of the beads. You may make it have a mesh.

  The first aspect of the present invention may include a step of injecting the cleaning liquid onto the mold taken out from the cleaning liquid containing the beads.

  Next, a mold cleaning apparatus according to a second aspect of the present invention is a mold cleaning apparatus that removes residues adhering to a mold, a container, a cleaning liquid that is injected into the container and is permeable to the residue, A bead inserted into the container, a mechanism for putting a mold in and out of the cleaning liquid containing the bead in the container, and a mechanism for swinging the mold inserted in the cleaning liquid containing the bead. And at least a control unit for controlling the machine.

  This makes it possible to reliably remove residues (dirt) that cannot be removed by high-pressure water cleaning or oscillating ultrasonic cleaning, and in addition to simple-shaped molds, complex-shaped molds that have a large number of irregularities and through-holes. Even if it exists, it can wash | clean reliably.

  In the second aspect of the present invention, the control unit may perform control to increase the amount of the cleaning liquid in the container when the mold is inserted into the cleaning liquid containing at least the beads.

  In the second aspect of the present invention, the control unit may adjust the amount of the cleaning liquid in the container at the stage where the insertion of the mold into the cleaning liquid including the beads is completed. Good.

  In this case, the control unit may perform control to increase the amount of the cleaning liquid in the container when the mold is taken out from the cleaning liquid containing the beads.

  In the second aspect of the present invention, the control unit has a mechanism for flowing and circulating the cleaning liquid, and when increasing the amount of the cleaning liquid in the container, controls the flow of the cleaning liquid together with the mechanism. It may be.

  Further, in the second aspect of the present invention, there is a cage installed in the container, into which the beads are injected, and the mold is inserted, and the cage has an opening diameter smaller than the size of the beads. You may make it have the made mesh.

  In the second aspect of the present invention, there may be provided a mechanism for injecting the cleaning liquid onto the mold taken out from the cleaning liquid containing the beads.

  As described above, according to the mold cleaning method and the mold cleaning apparatus according to the present invention, residues (dirt) that cannot be removed by high-pressure water cleaning or oscillating ultrasonic cleaning can be reliably removed, and a simple shape can be obtained. In addition to the mold, even a complex-shaped mold having a large number of irregularities and through holes can be reliably cleaned.

  Embodiments of a mold cleaning method and a mold cleaning apparatus according to the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, the mold cleaning apparatus 10 according to the present embodiment includes a container 12, a basket 14 installed in the container 12, a cleaning liquid 16 injected into the container 12, and a basket 14. A plurality of beads 18 accommodated in the first frame 22A, the first cage 22A for holding the first mold 20A, and the second mold 20B. A first cage 22A for moving the first cage 22A (the first mold 20A is held) in and out of the cleaning liquid 16 including the beads 18 in the container 12; A second vertical movement mechanism 24B for taking in and out the second basket 22B (the second mold 20B is held) in the cleaning liquid 16 including the beads 18, and the first basket inserted in the cleaning liquid 16 including the beads 18. First swing that swings 22A The structure 26A, a second swing mechanism 26B that swings the second basket 22B inserted in the cleaning liquid 16 including the beads 18, a storage tank 28 that stores the cleaning liquid 16, and the cleaning liquid 16 from the storage tank 28. A first pump 30 and a second pump 32 introduced into the container 12, a third pump 36 for introducing nitrogen gas from the nitrogen gas tank 34 into the container 12, and the cleaning liquid 16 in the container 12 through the filter 38. It has the 4th pump 40 collect | recovered in the storage tank 28, and the control part 42 which controls these various mechanisms and pumps.

  The first car 22A and the second car 22B are actually inserted into the car 14 in which the beads 18 are accommodated.

A plurality of injection holes 44 for injecting the cleaning liquid 16 into the container 12 are formed in the upper part of the inner wall of the container 12. The cleaning liquid 16 is introduced and circulated into the container 12 at the lower part of the inner wall and the bottom of the container 12. For example, a plurality of introduction circulation holes 46 and a gas introduction hole 48 for introducing nitrogen gas into the container 12 are formed. One or more discharge holes 50 are formed. The plurality of injection holes 44 are connected to the first pump 30 via the first conduit 52, the plurality of introduction circulation holes 46 are connected to the second pump 32 via the second conduit 54, and the plurality of gas introduction holes 48 are The third pump 56 is connected to the third pump 36 through the third conduit 56, and the one or more discharge holes 50 are connected to the fourth pump 40 through the fourth conduit 58.
The second pump 32 to the fourth pump 40, the introduction circulation hole 46, the gas introduction hole 48, the discharge hole 50, and the second conduit 54 to the fourth conduit 58 described above also function as a mechanism for flowing and circulating the cleaning liquid 16.

  The first mold 20A has a complicated shape in which a plurality of small through holes 60 having a diameter of, for example, about 3 mm are formed. The second mold 20B has a complex shape having a large number of projections and depressions, a diameter 62, for example, about φ1 mm, and a height 62, for example, with a large aspect ratio.

  As the cleaning liquid 16, a mixed liquid of NMP (N-methyl-2-pyrrolidone) that is permeable to urethane and a hydrocarbon solvent (for example, HC370) that is permeable to wax as a release agent is used. Of course, only NMP (N-methyl-2-pyrrolidone) permeable to urethane may be used as the cleaning liquid.

  The beads 18 are preferably made of a material that does not corrode the cleaning liquid 16. In the present embodiment, for example, nylon beads 18 that are made of a material that does not corrode the cleaning liquid 16 and that does not scratch or wear the first mold 20A or the second mold 20B. Using. The shape of the bead 18 is cylindrical, and its dimensions are about 0.4 mm in diameter and about 0.4 mm in height. Of course, the shape and dimensions of the beads 18 can be appropriately changed according to the shape of the mold to be cleaned. In the drawings, the beads 18 are displayed in a circular shape for easy illustration.

  A number of meshes whose opening diameters are smaller than the size of the beads 18 are formed in the cage 14 in which the beads 18 are accommodated.

  The first mold 20A and the second mold 20B described above are for forming a ceramic molded body having a desired shape by the gel casting method described above, and depending on use, the surface, the through holes 60, and the protrusions 62 are formed. Residues (dirt) such as alumina lump, release agent wax, urethane coating adhere to the surface or the like.

  Among these contaminants, the lump of alumina is removed by high-pressure water cleaning or rocking ultrasonic cleaning conventionally used. The mold cleaning apparatus 10 according to the present embodiment is for removing residues such as wax of a release agent and urethane coating that cannot be removed by high-pressure water cleaning or swing ultrasonic cleaning.

  Next, a method of cleaning the first mold 20A and the second mold 20B using the mold cleaning apparatus 10 described above will be described with reference to the process block diagram of FIG. 2 and the process diagrams of FIGS. 3A to 6B. .

  A large number of beads 18 and cleaning liquid 16 are put into the container 12, and the optimal amount of beads 18 and cleaning liquid 16 according to the shapes of the first mold 20 </ b> A and the second mold 20 </ b> B in advance. Is set and recorded in the memory of the control unit 42 (such as an information table stored in the memory). In particular, in the present embodiment, the first car 22A (holding the first mold 20A) and the second car 22B (holding the second mold 20B) are inserted into a large number of beads 18. At this time, since the cleaning liquid 16 is increased, information on the increase is also recorded in the memory.

  First, in step S1 of FIG. 2, as shown in FIG. 3A, the cage 14 containing the beads 18 is installed in the container 12, and the second pump 32 is driven to introduce the cleaning liquid 16 into the container 12. At this time, the cleaning liquid 16 is introduced in a larger amount than an appropriate amount (an appropriate amount for cleaning the first mold 20A and the second mold 20B). The introduction of the cleaning liquid 16 is performed by the control unit 42 controlling the second pump 32 based on the increase information recorded in the information table, the water level of the cleaning liquid 16, and the like. The controller 42 stops the driving of the second pump 32 when the water level of the cleaning liquid 16 reaches a predetermined increased amount of water. In this case, the cleaning liquid 16 may be introduced after the car 14 is installed in the container 12, or the car 14 may be installed in the container 12 after the cleaning liquid 16 is introduced into the container 12.

  Thereafter, in step S2 of FIG. 2, the first car 22A and the second car 22B are inserted into the car 14, as shown in FIG. 3B. That is, the control unit 42 drives the first vertical movement mechanism 24A and the second vertical movement mechanism 24B. Accordingly, the first car 22A holding the first mold 20A and the second car 22B holding the second mold 20B are inserted into the cleaning liquid 16 including the beads 18. By this insertion, the cleaning liquid 16 permeates the residue (dirt) adhering to the surface of the first mold 20A and the through-hole 60, and the surface of the second mold 20B and the surface of the protrusion 62, and the residue is removed over time. It will swell with progress.

  In the present embodiment, since the specific gravity of the beads 18 is 1.14, which is larger than the specific gravity of the cleaning liquid, in a stationary state, the beads 18 are sinked in the cage 14, that is, in a state of being densely packed in the cage 14. ing. Even if an attempt is made to install the first car 22A and the second car 22B in the car 14 in this state, the beads 18 are densely filled in the car 14, so that the first car 22A and the second car 22B are pushed in. I can't.

  Therefore, in this embodiment, before the first car 22A and the second car 22B are installed in the car 14 in step S1, the amount of the cleaning liquid 16 is increased from an appropriate amount, and the beads 18 in the car 14 are removed. By making it easy to flow, the packing density of the beads 18 in the car 14 is reduced, and the first car 22A and the second car 22B can be easily installed.

  Of course, the second pump 32 to the fourth pump 40 may be driven by the controller 42 in order to smoothly insert the first car 22A and the second car 22B. Thereby, the introduction of the cleaning liquid 16 from the introduction circulation hole 46, the introduction of the nitrogen gas from the gas introduction hole 48, and the discharge of the cleaning liquid 16 through the discharge hole 50 are performed simultaneously. As a result, the cleaning liquid 16 in the container 12 circulates and flows, and the first car 22A and the second car 22B can be installed more easily.

  At the stage where the first car 22A and the second car 22B are installed in the car 14, in step S3 of FIG. 2, as shown in FIG. 4A, the fourth pump 40 is driven and the cleaning liquid 16 in the container 12 is replaced. Drain the part. That is, the cleaning liquid 16 is discharged and adjusted until the amount of the cleaning liquid 16 in the container 12 reaches an appropriate amount set in advance. The discharge of the cleaning liquid 16 is performed by the control unit 42 controlling the fourth pump 40 based on an appropriate amount of information recorded in the information table, the water level of the cleaning liquid 16, and the like. The discharged cleaning liquid 16 is collected in the storage tank 28 via the filter 38. The controller 42 stops driving the fourth pump 40 when the water level of the cleaning liquid 16 reaches a predetermined appropriate amount (appropriate water level).

  Since the beads 18 are accommodated in the car 14 in which a large number of meshes having an opening diameter smaller than the size of the beads 18 are formed, the beads 18 are discharged together with the cleaning liquid 16 when the cleaning liquid 16 is partially discharged. There is nothing. This also leads to prevention of the discharge hole 50, that is, the failure of the fourth pump 40, and the like.

  When the cleaning liquid 16 in the container 12 reaches an appropriate amount, the driving of the fourth pump 40 is stopped. Subsequently, in step S4 of FIG. 2, as shown in FIG. The two cars 22B are swung in the car 14. That is, the control unit 42 drives the first swing mechanism 26A and the second swing mechanism 26B for a preset time (for example, 1 minute to 2 minutes). As a result, the first car 22A and the second car 22B inserted in the car 14 are swung. Examples of the swing include swing in the vertical direction, swing by 45 degrees about the vertical direction, and a combination thereof. By the swinging of the first car 22A and the second car 22B, the beads 18 come into contact with the surface of the first mold 20A and enter the through hole 60, and also come into contact with the surface of the second mold 20B. At the same time, it comes into contact with the surface of the protrusion 62 and the like. As a result, the residue in the swollen state is easily peeled off by contact with the beads 18.

  In the present embodiment, the second pump 32 to the fourth pump 40 are driven by the control unit 42 in order to further improve the fluidity of the beads 18 by rocking. Thereby, the introduction of the cleaning liquid 16 from the introduction circulation hole 46, the introduction of the nitrogen gas from the gas introduction hole 48, and the discharge of the cleaning liquid 16 through the discharge hole 50 are performed simultaneously. As a result, the cleaning liquid 16 in the container 12 circulates and flows, and the flow of the beads 18 is further promoted, and the residue attached to the first mold 20A and the second mold 20B is efficiently removed. be able to. In the above example, the cleaning liquid 16 and the nitrogen gas are introduced to promote the flow of the beads 18, but only the cleaning liquid 16 or only the nitrogen gas may be introduced.

  At the stage where the cleaning is completed, in the next step S5 of FIG. 2, as shown in FIG. 5A, the second pump 32 is driven to introduce the cleaning liquid 16 into the container 12, and the cleaning liquid in the container 12 is increased. . This increase is also performed by the control unit 42 controlling the second pump 32 based on the increase information recorded in the information table, the water level of the cleaning liquid 16, and the like. This increase in the amount of the cleaning liquid 16 is for facilitating the subsequent removal of the first car 22A and the second car 22B.

  Thereafter, in step S6 of FIG. 2, as shown in FIG. 5B, the first car 22A and the second car 22B are lifted upward in the container 12 by the first vertical movement mechanism 24A and the second vertical movement mechanism 24B. The first car 22A and the second car 22B are swung up and down. Since the amount of the cleaning liquid 16 is increased, the beads 18 in the car 14 can easily flow, and the first car 22A and the second car 22B can be easily lifted upward. Further, the beads 18 attached to the first mold 22A, the second mold 22B and the like are removed by the vertical swing of the first car 22A and the second car 22B. In particular, this vertical swing is effective for removing the beads 18 that have entered the through-hole 60 of the first mold 20A.

  Of course, in this case as well, the second pump 32 to the fourth pump 40 may be driven by the control unit 42 in order to smoothly take out the first car 22A and the second car 22B. Thereby, the introduction of the cleaning liquid 16 from the introduction circulation hole 46, the introduction of the nitrogen gas from the gas introduction hole 48, and the discharge of the cleaning liquid 16 through the discharge hole 50 are performed simultaneously. As a result, the cleaning liquid 16 in the container 12 circulates and flows, and the first car 22A and the second car 22B can be taken out more easily. The beads 18 attached to the first mold and the second mold can be efficiently removed.

  Subsequently, in step S7 of FIG. 2, as shown in FIG. 6A, the fourth pump 40 is driven to discharge a part of the cleaning liquid 16 in the container 12, and the first car 22A and the second car 22B are cleaned. 16, and the injection hole 44 provided in the inner wall of the container 12 is exposed from the cleaning liquid 16. Subsequently, the first pump 30 is driven to inject the cleaning liquid 16 from the injection holes 44 toward the first car 22A and the second car 22B. Thereby, the beads 18 attached to the first mold 20A, the second mold 20B and the like are removed.

  Thereafter, in step S8 of FIG. 2, the first car 22A and the second car 22B are taken out of the container 12 as shown in FIG. 6B. That is, the control unit 42 drives the first vertical movement mechanism 24A and the second vertical movement mechanism 24B. Thereby, the first car 22A holding the first mold 20A and the second car 22B holding the second mold 20B are taken out from the container 12.

  Thus, in the mold cleaning method and the mold cleaning apparatus 10 according to the present embodiment, residues (dirt) that cannot be removed by high-pressure water cleaning or oscillating ultrasonic cleaning can be reliably removed, and a simple shape can be obtained. In addition to the mold, even a complex-shaped mold having a large number of irregularities and through holes can be reliably cleaned. Moreover, since the cleaning can be completed in a short time of 1 to 2 minutes, it is possible to effectively simplify the work process and reduce the number of steps.

  Next, the experimental example which confirmed the detergency with respect to urethane about the comparative example 1, the comparative example 2, and the example is shown.

  Comparative example 1 is a conventional manual brush cleaning, comparative example 2 is an ultrasonic cleaning, and the example is a mold cleaning method according to the present embodiment.

  First, a cycle of producing a rectangular parallelepiped ceramic molded body using an aluminum rectangular test piece was repeated five times. That is, as shown in FIG. 7, the molding slurry is applied to the surface of the test piece, cast, and the molding slurry is made into a rectangular parallelepiped ceramic molded body, then released from the mold, and the surface of the test piece is subjected to high pressure. After washing with water, the cycle of drying was repeated 5 times.

  The amount of residue such as urethane adhering to the surface of the test piece can be determined by measuring the amount of carbon on the surface of the test piece. It shows that there is much quantity of the residue which has adhered, so that there is much carbon amount.

  FIG. 8 shows the change in the amount of carbon on the surface of the test piece at the initial stage, the surface of the test piece at the end of one cycle, and the surface of the test piece at the end of five cycles. It can be seen that by repeating the above-described cycle, the amount of urethane adhering to the surface of the test piece is increased.

Then, NMP was used as a cleaning liquid, the test piece was cleaned using three types of cleaning methods, and the carbon content on the surface of the test piece after cleaning was measured. The results are shown in FIG. 9 together with the measured values before washing. In FIG. 9, Comparative Example 1 and Example 1 have carbon amounts of 0.57 μg / cm ² and 0.23 μg / cm ² , and both target values (carbon amount on the surface of the test piece in the initial stage: FIG. 8). It is less than 0.69 μg / cm ² , which indicates that the detergency is excellent. However, the manual brush cleaning of Comparative Example 1 has a drawback that it cannot cope with complicated shapes such as the first mold 20A and the second mold 20B.

  Next, for Examples 1 to 3, the cleaning effect on urethane corresponding to the type of cleaning liquid 16 was confirmed using the mold cleaning apparatus 10 according to the present embodiment described above.

  Example 1 used NMP as the cleaning liquid, Example 2 used a hydrocarbon solvent (HC) as the cleaning liquid, and Example 3 used a mixed liquid of NMP and HC as the cleaning liquid.

About Examples 1-3, after each repeating the cycle of producing a rectangular parallelepiped ceramic molded body using an aluminum rectangular test piece in the same manner as described above, a mold cleaning device was used. The test piece was washed, and the carbon content on the surface of the test piece after washing was measured. The results are shown in FIG. 10 together with the measured values before cleaning. In FIG. 10, Example 1 and Example 3 have carbon amounts of 0.23 μg / cm ² and 0.27 μg / cm ² , both of which are less than the target value of 0.69 μg / cm ² , It can be seen that the cleaning power is excellent. However, in Example 2, the carbon content is 0.94 μg / cm ² , and it can be seen that the dirt is slightly adhered.

  Next, for Examples 4 to 6, the mold cleaning apparatus 10 according to the present embodiment described above was used to confirm the cleaning effect of the release agent on the wax according to the type of the cleaning liquid 16.

  Example 4 used NMP as the cleaning liquid, Example 5 used HC as the cleaning liquid, and Example 6 used a mixed liquid of NMP and HC as the cleaning liquid.

About Examples 4-6, the wax type mold release agent was apply | coated to the surface of the rectangular-shaped test piece made from aluminum, respectively, and after drying the surface of the test piece with high pressure water, it dried. Thereafter, the mold washer 10 was used to wash the test piece, and the carbon content on the surface of the test piece after washing was measured. The result is shown in FIG. In FIG. 11, Examples 5 and 6 have carbon amounts of 0.69 μg / cm ² and 0.47 μg / cm ² , both of which are not more than the target value of 0.69 μg / cm ² , It can be seen that the cleaning power is excellent. In Example 4, the carbon content is 16.98 μg / cm ² , and it can be seen that when NMP is used as the cleaning liquid, there is not much detergency against the wax.

  Therefore, when a wax-based release agent is applied when the ceramic molded body is produced with a mold, it is preferable to use a mixed liquid of NMP and HC as a cleaning liquid as in Example 6.

  It should be noted that the mold cleaning method and the mold cleaning apparatus according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

It is a block diagram which shows the metal mold | die cleaning apparatus which concerns on this Embodiment. It is a process block diagram which shows the metal mold | die cleaning method which concerns on this Embodiment. FIG. 3A is a process diagram showing a state in which a basket containing beads is placed in a container and a cleaning liquid is introduced (increase) into the container, and FIG. 3B is a diagram in which the first and second cars are inserted into the container. It is process drawing which shows a state. FIG. 4A is a process diagram showing a state in which the cleaning liquid in the container is adjusted to an appropriate amount, and FIG. 4B is a process diagram showing a state where the first car and the second car are swung in the car. FIG. 5A is a process diagram showing a state where the cleaning liquid is introduced (increased) into the container, and FIG. 5B is a process diagram showing a state where the first car and the second car are lifted and swung. FIG. 6A is a process diagram showing a state in which the cleaning liquid is sprayed toward the first car and the second car, and FIG. 6B is a process diagram showing a state in which the first car and the second car are taken out from the container. . It is explanatory drawing which shows the cycle which produces a rectangular parallelepiped ceramic molded object using the rectangular-shaped test piece made from aluminum. It is a characteristic view showing the change of each carbon content of the surface of the test piece in the stage which completed the surface of the surface of the test piece in the initial stage, the stage of the test piece in the stage which completed 1 cycle, and 5 cycles. It is a characteristic view which shows the cleaning power (urethane residual amount) with respect to urethane about the comparative example 1, the comparative example 2, and the Example. About Examples 1-3, it is a characteristic view which shows the cleaning effect (urethane residual amount) with respect to urethane according to the kind of cleaning liquid using the metal mold | die washing apparatus which concerns on this Embodiment. It is a characteristic view which shows the cleaning effect (wax residual amount) with respect to the wax of the mold release agent according to the kind of cleaning liquid about Examples 4-6 using the metal mold | die washing apparatus which concerns on this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Mold washing | cleaning apparatus 12 ... Container 14 ... Car 16 ... Cleaning liquid 18 ... Bead 20A ... 1st metal mold | die 20B ... 2nd metal mold 22A ... 1st car 22B ... 2nd car 24A ... 1st vertical movement mechanism 24B ... 1st 2 Vertical movement mechanism 26A ... 1st swing mechanism 26B ... 2nd swing mechanism

Claims (18)

In the mold cleaning method to remove the residue attached to the mold,
Into the container, a charging step of charging beads and a cleaning solution permeable to the residue,
A mold insertion step of inserting the mold into the cleaning liquid containing the beads charged in the container;
A rocking step of rocking the mold inserted in the cleaning liquid containing the beads;
Removing the mold from the cleaning liquid containing the beads;
A mold cleaning method comprising: The mold cleaning method according to claim 1,
A mold cleaning method, wherein the specific gravity of the beads is greater than the specific gravity of the cleaning liquid. The mold cleaning method according to claim 1 or 2,
The mold cleaning method, wherein the residue contains at least urethane. The mold cleaning method according to claim 3, wherein
The mold cleaning method, wherein the residue includes urethane and a release agent wax, and the cleaning liquid includes a hydrocarbon solvent. In the metal mold | die washing | cleaning method of any one of Claims 1-4,
The mold cleaning method, wherein the beads are made of a material that is not corroded by the cleaning liquid. In the metal mold | die washing | cleaning method of any one of Claims 1-5,
A mold cleaning method comprising the step of increasing the amount of the cleaning liquid in the container when the mold is inserted into the cleaning liquid containing at least the beads. The mold cleaning method according to claim 6, wherein
A mold cleaning method comprising adjusting the amount of the cleaning liquid in the container at a stage where the insertion of the mold into the cleaning liquid including the beads is completed. The mold cleaning method according to claim 7, wherein
A mold cleaning method comprising a step of increasing the amount of the cleaning liquid in the container when taking out the mold from the cleaning liquid containing the beads. The mold cleaning method according to claim 6 or 8,
A mold cleaning method comprising increasing the amount of the cleaning liquid in the container and fluidly circulating the cleaning liquid. In the mold cleaning method according to any one of claims 1 to 9,
In the charging step, whether or not the beads are contained in the container, the cleaning liquid is charged,
The mold cleaning method, wherein the cage has a mesh whose opening diameter is smaller than the size of the beads. In the metal mold | die washing | cleaning method of any one of Claims 1-10,
A mold cleaning method comprising the step of spraying the cleaning liquid onto the mold taken out from the cleaning liquid containing the beads. In a mold cleaning device that removes residues attached to the mold,
A container,
A cleaning liquid injected into the container and permeable to the residue;
Beads inserted into the container;
A mechanism for putting a mold in and out of the cleaning liquid containing the beads in the container;
A mechanism for swinging the mold inserted in the cleaning liquid containing the beads;
A control unit for controlling at least the machine;
A mold cleaning apparatus comprising: The mold cleaning apparatus according to claim 12, wherein
The controller is
A mold cleaning apparatus that controls to increase the amount of the cleaning liquid in the container when the mold is inserted into the cleaning liquid containing at least the beads. The mold cleaning apparatus according to claim 13,
The controller is
A mold cleaning apparatus, wherein the amount of the cleaning liquid in the container is adjusted at a stage where the insertion of the mold into the cleaning liquid containing the beads is completed. The mold cleaning apparatus according to claim 14, wherein
The controller is
A mold cleaning apparatus that controls to increase the amount of the cleaning liquid in the container when the mold is taken out from the cleaning liquid containing the beads. The mold cleaning apparatus according to claim 13 or 15,
The controller is
A mechanism for fluidly circulating the cleaning liquid;
A mold cleaning apparatus characterized by increasing the amount of the cleaning liquid in the container and performing control to flow and circulate the cleaning liquid. The mold cleaning apparatus according to claim 14, wherein
Installed in the container, having the basket into which the beads are injected and the mold is inserted;
The mold cleaning apparatus, wherein the cage has a mesh having an opening diameter smaller than the size of the beads. The mold cleaning apparatus according to any one of claims 12 to 17,
A mold cleaning apparatus having a mechanism for injecting the cleaning liquid onto the mold taken out from the cleaning liquid including the beads.

Images