JP2010099665A - Method and device for processing release agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the frequency of maintenance of a processing apparatus for processing a release agent collected after being supplied to a forming die, and to coat the release agent of the sufficient amount to the forming die. <P>SOLUTION: When the release agent L containing metal impurities and aggregates is shifted from a collection tank 22 to a first storage tank 26, metal impurities are separated from the release agent L under the action of a magnetic filter 24. The release agent L with only the aggregates being left therein is stored in the first storage tank 26, and sent to an aggregate refining filter 28. The aggregates are refined in the aggregate refining filter 28, both the metal impurities and the aggregates are removed from the release agent L, and the release agent is cleaned. The cleaned release agent L is introduced in a circulation tank 64, and re-sprayed on forming dies 32, 34 via a release agent discharger 70. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a release agent processing method and apparatus for processing a release agent collected after being supplied to a mold so that it can be re-applied.

  For example, when performing a warm forging process, a high-temperature work contacts a forming die constituting the forging apparatus. If the temperature of the mold rises to the same level as that of the workpiece as a result of this contact, there arises a problem that the strength and wear resistance of the mold are reduced.

  Further, fine irregularities are inevitably formed on the molding surface of the mold. For this reason, when the convex part of the workpiece and the convex part of the mold are brought into sliding contact during the forging process, a large stress acts on the sliding contact part. When such a situation occurs, it causes so-called galling.

  In order to avoid the above problems, for example, a graphite mold release agent is applied in advance to the mold. The mold release agent cools the mold to ensure the strength and wear resistance of the mold, and forms a film on the surface of the mold to impart lubricity so that the mold and the workpiece are relatively Slippery.

  Generally, the mold release agent is supplied excessively to the mold. Therefore, the surplus mold release agent is dripped from the mold together with burrs generated during the previous forging process and so-called scale generated on the molding surface of the mold (see Patent Documents 1 and 2).

  FIG. 2 is a schematic overall configuration diagram of a release agent processing apparatus 1 that processes the release agent so that recoating is possible. As shown in FIG. 2, the release agent L is first recovered in the recovery tank 3 via the collection tank 2 provided so as to surround the forging apparatus (not shown) and circulated by the pump 4. After being transferred to the tank 5, it is returned to the release agent discharger 7 by the pump 6.

  Here, a filter 9 is interposed in a liquid supply pipe 8 bridged between the recovery tank 3 and the release agent discharger 7. The filter 9 removes metallic impurities such as burrs and scales from the release agent L. Therefore, the release agent L containing almost no metal impurities is sent to the release agent discharger 7. The release agent L in this state is sprayed onto the molds 10 and 11 via the release agent discharger 7.

JP-A-2005-965 International Publication No. 00/3820 Pamphlet

  In the release agent treatment apparatus 1 shown in FIG. 2, the filter 9 is the only removal means for removing metal impurities from the release agent L. For this reason, the filter 9 is clogged in a short period. In this case, the filter 9 must be cleaned, and the recovery of the release agent L and the removal of metal impurities must be interrupted. That is, the operation of the mold release agent processing apparatus 1 must be stopped, and for this reason, the mold release agent L cannot be reapplied to the molds 10 and 11, so that it is necessary to interrupt the forging process. . In short, the release agent processing apparatus 1 according to the prior art has a problem of reducing the working efficiency of the forging process. Therefore, it is also conceived that a spare bypass filter is provided and the filter 9 is switched to this bypass filter when the filter 9 is clogged. However, in this case, since the bypass line is provided, the device configuration becomes complicated.

  In addition, the filter 9 is broken in a short time (so-called perforated breakage) due to the metal impurities and the supply liquid pressure, so that maintenance or replacement must be frequently performed, which is complicated.

  Furthermore, the component (for example, graphite) contained in the release agent L causes aggregation relatively easily to generate an aggregate. If the aggregate is returned to the release agent discharger 7 without being collected by the filter 9, the release agent discharger 7 may be clogged by the aggregate. When such a situation occurs, the amount of the release agent L applied to the molds 10 and 11 becomes insufficient, so that the molds 10 and 11 are not sufficiently cooled and sufficient lubricity is not imparted. . In this case, the molds 10 and 11 are damaged relatively early.

  The damaged molds 10 and 11 may be replaced with new ones. However, this type of mold is generally expensive. Therefore, if the replacement frequency is high, the production cost increases.

  The present invention has been made to solve the above-described problems, and it is possible to improve the work efficiency of the forging process and reduce the maintenance frequency, and in addition, the returned release agent can be used in a sufficient amount. It aims at providing the processing method of the mold release agent which can be apply | coated to a shaping | molding die, and its apparatus.

In order to achieve the above-mentioned object, the present invention is a method for treating a release agent, wherein a release agent recovered after being supplied to a mold is treated so as to be re-applicable.
Removing metal impurities contained in the recovered release agent;
A step of refining the agglomerates contained in the release agent from which the metal impurities have been removed, and making it re-applicable;
It is characterized by having.

  In other words, according to the present invention, the release agent returns to the original state by refining the aggregate. For this reason, it is avoided that the release agent discharger is clogged with aggregates, so that a sufficient amount of the release agent is applied to the mold. For this reason, the mold is sufficiently cooled and sufficient lubricity is imparted. As a result, the mold has a long life. Therefore, since the frequency of replacing the mold is reduced, the production cost is also reduced.

  In addition, the step of removing the metal impurities and the step of refining the agglomerates are performed as separate steps in each of the removing means and the agglomerate refining means, and these two steps are performed by the same means. As compared with the case where it is performed at the same time, it is possible to avoid the clogging of each of the removing means and the agglomerate refining means at an early stage. Therefore, the maintenance frequency is reduced, and as a result, the frequency of stopping the release agent recovery operation and the forging process is also reduced. Therefore, work efficiency is improved.

  In this case, the release agent remaining without the aggregate being refined is separated from the aggregate as a supernatant, and the obtained supernatant is subjected to the step of removing metal impurities, or the aggregate. You may make it return to either of the said process made into the state which can be re-applied by refinement | miniaturizing. If this supernatant is re-applied to the mold, the use efficiency of the release agent is further improved. Therefore, the replenishment amount of the new release agent is reduced, and this is advantageous in terms of cost.

  In any case, it is preferable to employ a magnetic method when removing the metal impurities from the release agent. In this case, it is easy to separate the metal impurities from the release agent, and the maintenance work for the removing means is less frequent. Note that removal means capable of magnetically removing metal impurities are known.

Further, the present invention is a release agent processing apparatus for processing the release agent collected after being supplied to the mold so as to be re-applicable,
A collection tank for collecting the release agent after being supplied to the mold,
Removing means for removing metal impurities contained in the release agent recovered in the recovery tank;
A release agent storage tank for storing the release agent from which metal impurities have been removed;
Refining means for refining aggregates contained in the release agent stored in the release agent storage tank;
It is characterized by providing.

  By adopting such a configuration, it is possible to send the release agent returned to its original state after removal of metal impurities and aggregates to the release agent discharge device, so that the release agent discharge device is clogged. Waking up is avoided. Accordingly, it is possible to apply a sufficient amount of the release agent to the mold, thereby sufficiently cooling the mold and providing sufficient lubricity to the mold. For this reason, since a shaping | molding die becomes long life, replacement frequency reduces, and a production cost can be reduced after all.

  In addition, since the removing means for removing the metal impurities and the aggregate refining means for refining the aggregates are provided separately, the maintenance frequency is reduced. Therefore, it is not necessary to frequently stop the forging process, and thus the working efficiency is improved.

  Furthermore, it is preferable to provide a reprocessing required release agent storage tank for storing the release agent remaining without agglomerates being refined. With this reprocessing release agent storage tank, the release agent can be separated from the aggregate as a supernatant. By re-coating the obtained supernatant on the mold as described above, the release agent can be used efficiently.

  In addition, it is preferable that the said supernatant liquid is transferred to the said removal means or the said refinement | miniaturization means. In this case, even if the aggregate remains in the supernatant, the supernatant is re-passed through the removing means for removing the aggregate and then sent to the release agent discharger. Therefore, the release agent discharger is further prevented from being clogged.

  For the reason described above, the removing means is preferably a magnetic filter that magnetically attracts metal impurities.

  According to the present invention, after removing metal impurities from a release agent containing metal impurities and aggregates, the release agent is returned to its original state and reused by refining the aggregates. Accordingly, a release agent containing almost no metal impurities and aggregates is sent to the release agent discharger. For this reason, the clogging of the release agent discharger is avoided, so that a sufficient amount of the release agent is applied to the mold. Accordingly, the mold is sufficiently cooled, and sufficient lubricity is imparted to the mold.

  As a result, the strength and lubricity of the mold are ensured, thereby extending the life of the mold. That is, the replacement frequency of the mold is reduced, and thus the production cost is reduced.

  Moreover, since the maintenance frequency is reduced, the frequency of stopping the release agent recovery operation and the forging process is also reduced. For this reason, work efficiency is also improved.

  Hereinafter, preferred embodiments of the method for treating a release agent according to the present invention will be described in detail in relation to a release agent treatment apparatus for carrying out the same, and detailed explanation will be given with reference to the accompanying drawings.

  FIG. 1 is a schematic overall configuration diagram of a release agent processing apparatus (hereinafter also simply referred to as a processing apparatus) 20 according to the present embodiment. The processing apparatus 20 includes a recovery tank 22 for recovering the release agent L, a magnetic filter (removing means) 24 through which the release agent L sent from the recovery tank 22 passes, and the magnetic filter 24. A first storage tank (release agent storage tank) 26 for storing the release agent L that has passed through, and an aggregate refinement filter (fine) through which the release agent L fed from the first storage tank 26 passes. And a second storage tank (reprocessing required release agent storage tank) 30 in which the release agent L containing the aggregates separated by the aggregate refinement filter 28 is returned. As will be described later, the release agent L in the second storage tank 30 is mixed with the release agent L that has overflowed into the first storage tank 26 and from which metal impurities have been separated.

  On the floor on which a forging apparatus (not shown) including the forming dies 32 and 34 is installed, a collection tank 36 is formed to be recessed so as to surround the forging apparatus. The side wall of the collection tank 36 is inclined. Therefore, the release agent L that has flowed into the collection tank 36 efficiently flows to the bottom, and passes through the first liquid supply pipe 38 connected to the bottom of the collection tank 36. Then, the solution is fed to the collection tank 22 installed under the floor of the forging apparatus.

  A second liquid feeding pipe 40 is bridged from the collection tank 22 to the magnetic filter 24. A pump 42 is interposed in the second liquid feeding pipe 40, and the release agent L collected in the collection tank 22 is pumped by the pump 42 and fed to the magnetic filter 24.

  The magnetic filter 24 attracts metal impurities by generating a magnetic force, and thereby separates the metal impurities from the release agent L. Such a magnetic filter 24 is known as described in Patent Document 2 and will not be described in detail. The metal impurities separated from the release agent L are made into a cake and discharged from the magnetic filter 24.

  The first storage tank 26 and the second storage tank 30 are connected to each other. That is, the 1st storage tank 26 and the 2nd storage tank 30 share the outer wall, and are divided into the 1st storage tank 26 and the 2nd storage tank 30 by providing the partition plate 44 in the inside.

  The first storage tank 26 is provided with a liquid surface position detector 46 for monitoring the liquid surface position of the release agent L. When the liquid surface position detector 46 detects that the liquid level of the release agent L is higher than a predetermined position, a pump 58 (described later) for sending the release agent L to the agglomerate fine filter 28 is provided. Be energized.

  The first storage tank 26 is also provided with a stirrer 48 for stirring the release agent L in the first storage tank 26. As the agitator 48 is energized, the agitating blade 50 starts rotating.

  The second storage tank 30 is partitioned into an introduction part 54 and an overflow part 56 by a dam plate 52 suspended from the ceiling surface. That is, as will be described later, the introduction portion 54 is introduced with the amount derived from the bottom of the release agent L introduced into the aggregate refinement filter 28, while the overflow portion 56 receives the supernatant. The liquid overflows and moves to the first storage tank 26.

  A third liquid feeding pipe 60 with a pump 58 interposed is bridged from the first storage tank 26 to the aggregate refinement filter 28. In other words, the release agent L stored in the first storage tank 26 is fed to the aggregate refinement filter 28 under the action of the pump 58.

  Although not shown, the agglomerate refinement filter 28 is configured such that a mesh is accommodated in a hollow container, and is separated between the hollow container and the mesh via a side portion of the agglomerate refinement filter 28. A mold L is introduced. A part of the release agent L passes through the mesh, passes through the inner collection tube of the mesh, and then is led out to the outside through the side portion of the agglomerate refinement filter 28. On the other hand, the remaining mold release agent L descends to the bottom of the agglomerate micronization filter 28 while spirally flowing between the hollow container and the mesh, in other words, around the mesh. To be derived.

  Examples of this type of agglomerate fine filter 28 include a metal edge filter (trade name) manufactured by MAHLE, Germany.

  The release agent L led out from the bottom of the aggregate refinement filter 28 is transferred to the introduction part 54 of the second storage tank 30 through the fourth liquid feeding pipe 61 as described above. On the other hand, the release agent L led out from the side is transferred to the circulation tank 64 via the fifth liquid feeding pipe 62.

  One end of a sixth liquid feeding pipe 68 in which a pump 66 is interposed is connected to the circulation tank 64, and the other end of the sixth liquid feeding pipe 68 is connected to a release agent discharger 70. . A filter 72 is disposed on the downstream side of the pump 66 in the sixth liquid feeding pipe 68.

  The processing apparatus 20 according to the present embodiment is basically configured as described above. Next, the operation and effect thereof will be described in relation to the processing method of the release agent L according to the present embodiment. To do.

  After the forging process is completed, the release agent L discharged from the release agent discharger 70 is sprayed onto the forming dies 32 and 34 before the next forging process is performed. Thereby, the release agent L is applied to the molding surfaces of the molds 32 and 34.

  Also in the present embodiment, the mold release agent L is supplied excessively to the molds 32 and 34. Therefore, excess mold release agent L is dropped from the molds 32 and 34. At this time, burrs, scales, etc. generated during the forging forming process, that is, metal impurities are accompanied by the release agent L and are released from the forming dies 32 and 34.

  In other words, the mold release agent L is dropped from the molds 32 and 34 in a state containing metal impurities, and is collected in the collection tank 36 of the forging apparatus in this state. The collected release agent L is transferred to the collection tank 22 via the first liquid feeding pipe 38.

  Here, as described above, the component (for example, graphite) contained in the release agent L is relatively easily aggregated. For this reason, aggregates start to be generated in the release agent L transferred to the recovery tank 22. That is, the release agent L containing metal impurities and aggregates is stored in the collection tank 22.

  The release agent L containing metal impurities and aggregates is sent to the magnetic filter 24 under the action of the pump 42 disposed in the second liquid feeding pipe 40. Inside the magnetic filter 24, metal impurities are magnetically attracted, and as a result, the metal impurities are separated from the release agent L. That is, metal impurities are removed from the release agent L, and only aggregates remain in the release agent L.

  The removed metal impurities are discharged from the magnetic filter 24 as a dehydrated cake state. On the other hand, the release agent L containing aggregates is stored in the first storage tank 26 after being led out from the magnetic filter 24 and stirred by the stirring blade 50 that rotates. Further, the liquid surface position detector 46 detects that the liquid surface position has become a predetermined height or more as the storage amount of the release agent L in the first storage tank 26 becomes a predetermined amount or more. Then, the pump 58 is automatically energized.

  The release agent L containing the aggregate is then sent to the aggregate refinement filter 28 via the third liquid feeding pipe 60 under the action of the pump 58. As described above, the release agent L is introduced into the inside through the side portion of the hollow container constituting the aggregate refinement filter 28, and a part thereof passes through the mesh accommodated in the hollow container. . During this passage, the agglomerates are crushed by the mesh, whereby the agglomerates are refined.

  The remaining part of the release agent L descends to the bottom of the agglomerate refinement filter 28 while spirally flowing around the mesh. Along with this flow, a force toward the center of the spiral rotation, that is, the mesh direction acts on the release agent L. Due to this force, the aggregate collected outside the mesh is pressed toward the inside of the mesh, and finally the aggregate is crushed (miniaturized) and passes through the mesh. Therefore, it is avoided that the aggregates are collected and retained in the mesh, and eventually clogging is avoided.

  For this reason, it is not particularly necessary to frequently perform maintenance on the agglomerated fine filter 28. That is, the maintenance frequency does not increase as the aggregates are refined. On the other hand, since the frequency of clogging is reduced, the maintenance frequency is reduced, and the frequency of the processing of the release agent L and the forging process are also reduced, thereby improving the work efficiency.

  The release agent L thus refined, in other words, removed and cleaned in this manner is circulated through the fifth liquid feeding pipe 62 connected to the side of the aggregate refinement filter 28. The solution is transferred to the tank 64. On the other hand, the remaining part of the release agent L that has fallen to the bottom of the aggregate refinement filter 28 while containing aggregates is transferred to the introduction part 54 of the second storage tank 30 via the fourth liquid feeding pipe 61. It is.

  As can be understood from the above, the release agent L including the aggregates introduced from the bottom of the aggregate refinement filter 28 is introduced into the introduction part 54 of the second storage tank 30. Among the aggregates, those having a specific gravity greater than that of the release agent L precipitate, and those having a smaller specific gravity float on the liquid surface of the release agent L. In addition, those having a specific gravity substantially equal to that of the release agent L migrate in the release agent L. That is, in the second storage tank 30, a precipitate 80, a suspended matter 82, and an electrophoretic material 84 are generated.

  Among these, the floating substance 82 and the electrophoretic substance 84 are blocked by the blocking plate 52. Thereby, the floating substance 82 and the migrating substance 84 are prevented from moving to the overflow portion 56. In addition, since the precipitate 80 is precipitated at the bottom of the second storage tank 30, it does not move to the overflow portion 56.

  Therefore, from the overflow part 56, the sediment 80, the suspended | floating matter 82, and the electrophoretic material 84, in other words, the supernatant liquid which hardly contains agglomerate overflows as the clean mold release agent L, and enters the 1st storage tank 26. Flow down. That is, in the 1st storage tank 26, the mold release agent L which passed the magnetic filter 24 and the mold release agent L introduced from the overflow part 56 of the 2nd storage tank 30 are mixed, and this mixed mold release agent L is used. Under the action of the pump 58, it is sent to the agglomerate fine filter 28. For this reason, since the excess release agent L can be efficiently recycled and reused, the amount of new release agent L used can be reduced. Therefore, it is advantageous in terms of cost.

  The mold release agent L, which is led out from the side of the agglomerate refinement filter 28 and transferred to the circulation tank 64 via the fifth liquid feeding pipe 62, contains metal impurities and agglomerates as understood from the above. It has been removed and cleaned. The release agent L is sent to the release agent discharge device 70 via the sixth liquid feeding pipe 68 under the action of the pump 66 and is re-sprayed toward the molds 32 and 34. Even if some amount of metal impurities and agglomerates remain in the release agent L introduced into the circulation tank 64, these residues are removed before being discharged from the release agent discharger 70. It is collected by the filter 72 interposed in the 6 liquid feeding pipe 68.

  Therefore, it is avoided that the release agent discharger 70 is clogged with aggregates or metal impurities. Therefore, a sufficient amount of the release agent L is applied to the molds 32 and 34. As a result, the molds 32 and 34 are sufficiently cooled and sufficient lubricity is imparted. This prolongs the service life of the molds 32 and 34, thereby reducing the frequency of replacement thereof, and eventually preventing the production cost from rising.

  Moreover, as can be seen from the above, the filter 72 is hardly clogged or damaged with holes. This is because the release agent L introduced into the circulation tank 64 contains almost no metal impurities and aggregates, and even if they are contained, the amount is slight.

  Accordingly, the maintenance frequency and replacement frequency for the filter 72 are remarkably reduced, and therefore, the frequency at which the processing of the release agent L and the forging process are interrupted is also reduced. Thereby, the advantage that work efficiency improves is also acquired. And since it is not necessary to provide a bypass filter and a bypass line, the mold release agent processing apparatus 20 can also be comprised simply.

  In the above-described embodiment, the magnetic filter 24 that magnetically separates metal impurities is used. However, the present invention is not particularly limited to this, and any material that can separate metal impurities can be used. It may be.

  In this embodiment, the supernatant of the second storage tank 30 is returned to the first storage tank 26 so as to be sent to the agglomerate refinement filter 28, but the supernatant is supplied to the magnetic filter 24. You may make it return.

  Furthermore, the molds 32 and 34 are not limited to those constituting the forging apparatus, and may constitute a casting apparatus.

It is a schematic whole block diagram of the mold release agent processing apparatus which concerns on this Embodiment. It is a schematic whole block diagram of the mold release agent processing apparatus which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 ... Release agent processing apparatus 22 ... Recovery tank 24 ... Magnetic filter 26 ... 1st storage tank (release agent storage tank)
28 ... Aggregate refinement filter 30 ... Second storage tank (reprocessing release agent storage tank required)
32, 34 ... Mold 36 ... Collection tank 42, 58, 66 ... Pump 44 ... Partition plate 52 ... Damping plate 54 ... Introduction part 56 ... Overflow part 64 ... Circulation tank 70 ... Release agent discharger 72 ... Filter 80 ... Precipitate 82 ... Floating substance 84 ... Electrophoresis L ... Release agent

Claims (5)

A release agent processing method for processing a release agent recovered after being supplied to a mold so as to be re-applicable,
Removing metal impurities contained in the recovered release agent;
A step of refining the agglomerates contained in the release agent from which the metal impurities have been removed, and making it re-applicable;
A method for treating a release agent, characterized by comprising:   The processing method according to claim 1, wherein the release agent remaining without the agglomerates being refined is separated from the agglomerates as a supernatant, and the obtained supernatant is freed from metal impurities. The release agent treatment method is characterized in that the process returns to either the step to be performed or the step to make the agglomerates fine and reapplyable. A release agent processing apparatus for processing a release agent collected after being supplied to a mold so as to be re-applicable
A collection tank for collecting the release agent after being supplied to the mold,
Removing means for removing metal impurities contained in the release agent recovered in the recovery tank;
A release agent storage tank for storing the release agent from which metal impurities have been removed;
Refining means for refining aggregates contained in the release agent stored in the release agent storage tank;
The mold release agent processing apparatus characterized by including.   4. The apparatus according to claim 3, further comprising a reprocessing release agent storage tank that stores the release agent that remains without the aggregates being refined, A release agent processing apparatus, wherein the release agent is separated from the aggregate as a supernatant.   5. The release agent processing apparatus according to claim 4, wherein the supernatant is transferred to either the removing means or the miniaturizing means.

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