JP3785287B2 - Molding method and apparatus for molding - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for forming a molded body and an apparatus therefor, and more specifically, while a molded body is being molded in a suction tank, a raw material liquid is not insufficient and a molded body having a predetermined thickness can be reliably obtained. In addition, the present invention relates to a method for molding a molded body that can be molded efficiently and an apparatus therefor.
[0002]
[Prior art]
A sleeve mounted on a cylinder block of an automobile engine is usually molded by a molding apparatus including a suction tank and a replenishment tank for storing a raw material liquid supplied to the suction tank. That is, in the suction tank, the raw material liquid is sucked through the cylindrical sand sleeve by the suction mechanism, and the sleeve raw material dispersed in the raw material liquid is adhered to the outer peripheral surface of the sand sleeve. If the raw material liquid in the suction tank is insufficient during the suction, the raw material liquid is supplied from the replenishing tank. By replenishing the raw material liquid in this manner, the suction and adhesion work can be continued.
[0003]
By the way, after a predetermined time has passed since the suction was started, a cylindrical molded body having a thickness corresponding to the suction time is formed. Subsequently, if this molded body is heat-treated and further the sand sleeve is removed, the sleeve is obtained as a finished product.
[0004]
Here, a liquid level detector is installed in the above-described raw material liquid replenishing tank, and when the liquid level of the raw material liquid stored in the replenishing tank reaches the storage lower limit, the liquid level detector Send a signal to the control circuit. The sequence control circuit that has received this signal controls the suction mechanism not to be energized even if the activation switch is turned on before the suction mechanism is energized.
[0005]
[Problems to be solved by the invention]
By the way, the liquid level detector also sends a signal to the sequence control circuit when the liquid level of the raw material liquid reaches the storage lower limit of the replenishing tank while supplying the raw material liquid from the replenishing tank to the suction tank. send. The sequence control circuit that has received this signal stops the supply of the raw material liquid to the suction tank. That is, in the suction tank, the supply of the raw material liquid is stopped even while the sleeve is being formed on the outer peripheral surface of the sand sleeve.
[0006]
However, when the supply of the raw material liquid is stopped in this manner, the molding of the molded body must be stopped even though the molded body has not reached the predetermined thickness. That is, in the molding apparatus according to the related art, when it is detected by the liquid level detector installed in the replenishing tank that the liquid level of the raw material liquid has reached the storage lower limit of the replenishing tank, the molding operation of the molded body is performed. Therefore, there is an inconvenience that a sleeve having a predetermined thickness cannot be manufactured and the yield is lowered.
[0007]
In order to avoid this inconvenience, a liquid level detector need not be installed in the replenishing tank. However, in this case, the suction mechanism can be urged even when the liquid level of the raw material liquid has reached the storage lower limit of the replenishing tank. For this reason, the inside of the replenishing tank becomes empty during the molding of the molded body, and the raw material liquid cannot be supplied, so that a molded body having a predetermined thickness cannot be molded after all. In addition, there is a concern that the pump for supplying the raw material liquid from the replenishing tank to the suction tank may idle, and the pump may be damaged.
[0008]
The present invention has been made to solve the above-described problems. When a molded body is formed in the suction tank, the supply mechanism is stopped even if the storage lower limit is detected by the liquid level detector of the replenishing tank. Thus, a shortage of raw material liquid during molding of the molded body is avoided, and as a result, a molded body molding method and apparatus capable of efficiently molding the molded body with a predetermined thickness are provided. The purpose is to do.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, the present inventionSucks with a suction mechanism a raw material liquid in which a material is dispersed in a solvent through a support member having a hollow part and provided with a hole communicating with the hollow part and a porous body surrounding the outer wall of the support member. In the molding method of the molded body, the solvent is passed through the porous body and the support member, and the material is attached to the outer wall of the porous body to provide the molded body on the outer wall.
  Raw material liquid stored in the suction tankThe aboveSuctioned by a suction mechanism and dispersed in the raw material liquidSaidThe material is attached to the outer wall of the porous bodyTheA molded body made of the above material is molded on the outer wall.,
  During that,When the first liquid level detector installed in the suction tank detects that the liquid level of the raw material liquid in the suction tank has reached the storage lower limit of the suction tank, the supply mechanism is energized. Thus, the raw material liquid is supplied from the replenishing tank to the suction tank, and the liquid level of the raw material liquid in the replenishing tank is set in the replenishing tank by the second liquid level detector installed in the replenishing tank. Even if it is detected that the storage lower limit has been reached, the supply mechanism continues to be energized to continue supply, and the liquid level of the raw material liquid in the suction tank is stored in the suction tank by the first liquid level detector. The supply of the raw material liquid is stopped by stopping the supply mechanism when it is detected that the upper limit has been reached.
[0010]
In the molding method described above, the raw material liquid in the suction tank does not run short while the molded body is being molded. Therefore, since it becomes possible to shape | mold a molded object with desired thickness, the yield at the time of molded object manufacture improves.
[0011]
In this case, when the second liquid level detector detects that the liquid level of the raw material liquid in the replenishing tank has reached the storage lower limit of the replenishing tank, a supply mechanism different from the supply mechanism The raw material liquid is supplied from the storage tank to the replenishing tank by energizing the liquid tank, and the liquid level of the raw material liquid in the replenishing tank has reached the storage upper limit of the replenishing tank by the second liquid level detector. It is preferable to stop the supply of the raw material liquid by stopping the another supply mechanism when detected.
[0012]
Thereby, when the liquid level of the raw material liquid in the replenishing tank reaches the storage lower limit, a new raw material liquid is reliably supplied from the storage tank. Therefore, it becomes possible to shape | mold a molded object continuously.
[0013]
Examples of the molded body to be molded include a cylinder sleeve mounted on an automobile engine.
[0014]
  In addition, this departureTomorrowAnd a hole having a hollow portion and communicating with the hollow portion.The raw material liquid in which the material is dispersed in the solvent is sucked through the support member and the porous body surrounding the outer wall of the support member under the action of a suction mechanism, and the solvent is applied to the porous body and the support member. In a molding apparatus for a molded body that allows the material to pass through and attach the material to the outer wall of the porous body to provide the molded body on the outer wall,
  OutsideWallSaidSurrounded by porous material繞WasSaidA suction tank having a support member;
  A suction mechanism for sucking the raw material liquid stored in the suction tank through the porous body and the support member;
  A first liquid level detector for detecting the liquid level of the raw material liquid stored in the suction tank;
  A replenishing tank for storing the raw material liquid supplied to the suction tank;
  A second liquid level detector for detecting the liquid level of the raw material liquid stored in the replenishing tank;
  A supply mechanism for supplying the raw material liquid from the replenishing tank to the suction tank via a liquid feeding pipe;,
  With
  The raw material liquid stored in the suction tank is sucked by the suction mechanism, and the material dispersed in the raw material liquid is adhered to the outer wall of the porous body, and the outer wall of the porous body is made of the material. Molding the molded body,
  During the molding of the molded body, when the first liquid level detector detects that the liquid level of the raw material liquid in the suction tank has reached the storage lower limit of the suction tank, the supply mechanism is attached. The raw material liquid is supplied from the replenishing tank to the suction tank, and the liquid level of the raw material liquid in the replenishing tank reaches the storage lower limit of the replenishing tank by the second liquid level detector. Even when it is detected that the supply mechanism has not been stopped, the first liquid level detector detects that the liquid level of the raw material liquid in the replenishing tank has reached the storage upper limit of the suction tank. The supply mechanism is stopped to stop the supply of the raw material liquid.
[0015]
In the molding apparatus configured as described above, the supply of the raw material liquid is not stopped while the molded body is being molded. Therefore, it becomes possible to make a molded object into desired thickness. Further, since the molding operation of the molded body is not interrupted, the yield in manufacturing the molded body is improved.
[0016]
The molding apparatus described above further includes a storage tank for storing the raw material liquid supplied to the replenishing tank, and the supply mechanism that supplies the raw material liquid from the storage tank to the replenishing tank via a liquid feeding pipe. Preferably comprises a separate supply mechanism. In this case, when it is detected by the second liquid level detector that the liquid level of the raw material liquid in the replenishing tank has reached the storage lower limit of the replenishing tank, the other supply mechanism is energized, The raw material liquid is supplied from the storage tank to the supply tank. In this supply, when the second liquid level detector detects that the liquid level of the raw material liquid in the replenishing tank has reached the storage tank upper limit, the other supply mechanism is stopped. Is stopped by.
[0017]
As described above, when the liquid level of the raw material liquid in the replenishing tank reaches the storage lower limit, a new raw material liquid is rapidly supplied from the storage tank, so that it is not necessary to prepare the raw material liquid in the replenishing tank. Even when preparing the raw material liquid, it is not necessary to stop the molding apparatus. Therefore, since it becomes possible to shape | mold a molded object continuously, production efficiency improves.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the molding method of the molded body according to the present invention will be described in detail in relation to a molding apparatus for carrying out the method, with reference to the accompanying drawings.
[0019]
A schematic configuration of the molding apparatus according to the present embodiment is shown in FIG. As shown in FIG. 1, the molding apparatus 10 includes a suction tank 12, a replenishing tank 14, and a storage tank 16, and a molded body is placed in the suction tank 12, the replenishing tank 14, and the storage tank 16. A raw material liquid 18 in which raw materials for molding are dispersed in the liquid is stored. When forming a sleeve to be mounted on a cylinder block of an automobile engine as a molded body, as the raw material liquid 18, for example, an alumina fiber (not shown) and carbon fiber (not shown) dispersed in water is used. Is done.
[0020]
  In the suction tank 12, a sand sleeve 20, which is a cylindrical porous body, is held in a state of being sandwiched between a jig 22 and a jig 24 having a disk shape and a diameter larger than the diameter of the sand sleeve 20. ing. In this case, the sand sleeve 20 is placed on a base 26 fixed to the bottom of the suction tank 12 via the jig 22.ListedIs placed.
[0021]
  More specifically, referring to FIG. 2, the sand sleeve 20 surrounds the outer peripheral surface 28 a of the shaft 28.繞Are arranged. The interior 28b of the shaft 28 is hollow as can be seen from FIG. The shaft 28 has a plurality of holes 28c communicating with the interior 28b. Further, recesses 22a and 22b are respectively formed on the upper surface and the lower surface of the center portion of the jig 22, the shaft 28 is engaged with the recess 22a on the upper surface, and the pedestal 26 passes through the recess 22b on the lower surface. The tip of the suction pipe 30a is engaged. And the inside 28b of the axis | shaft 28 and the suction pipe 30a are connected via the communicating hole 22c connected to each of the recessed parts 22a and 22b of the jig | tool 22. As shown in FIG. On the other hand, a recess (not shown) is formed on the lower surface of the jig 24, and the upper end of the shaft 28 is engaged with the recess.
[0022]
As described above, the sand sleeve 20 is sandwiched between the jig 22 and the jig 24 by engaging the shaft 28 with the jig 22 and the jig 24. The sand sleeve 20 contains a thermoplastic resin as a binder.
[0023]
Here, as shown in FIG. 1, the suction side valve 34, the suction pipe 30 b, the flexible hose 36 and the suction pipe 30 c are connected in this order from the suction pipe 30 a to the suction pump 32. A discharge pipe 40 in which a discharge side valve 38 is interposed is connected to the discharge port of the suction pump 32.
[0024]
The suction tube 30a can be slid up and down by a lifting mechanism (not shown). When the suction tube 30a is slid upward, the flexible hose 36 is extended, and the suction tube 30b and the suction side valve 34 are also slid upward. As the suction pipe 30a slides upward, the shaft 28 and the sand sleeve 20 are also slid upward together with the jig 22 engaged with the upper end of the suction pipe 30a, and the suction pipe 30a reaches the top dead center. In this case, the sand sleeve 20 is exposed to the outside of the suction tank 12.
[0025]
A liquid level detector 42 is installed in the suction tank 12, and the liquid level of the raw material liquid 18 stored in the suction tank 12 is detected by the liquid level detector 42. That is, the liquid level detector 42 has level sensors 42a and 42b, the liquid level of the raw material liquid 18 is lowered to a position lower than the tip of the level sensor 42a, and the tip of the level sensor 42a is the liquid level. Is detected as the lower limit of storage. Moreover, when the liquid level of the raw material liquid 18 reaches the height of the front-end | tip part of the level sensor 42b and both contact, it detects as a storage upper limit.
[0026]
On the other hand, the replenishing tank 14 is a tank for supplying a new raw material liquid 18 to the suction tank 12 when the raw material liquid 18 in the suction tank 12 becomes insufficient during molding of the molded body in the suction tank 12. . The replenishing tank 14 is provided with a liquid level detector 44 that detects the liquid level of the raw material liquid 18 stored in the replenishing tank 14. That is, the liquid level detector 44 also has level sensors 44 a and 44 b as in the case of the liquid level detector 42, and the storage lower limit of the replenishing tank 14 is determined by these level sensors 44 a and 44 b according to the liquid level detector 42. Or the storage upper limit is detected.
[0027]
A liquid feeding pipe 46 is bridged from the suction tank 12 to the replenishing tank 14. A supply mechanism 52 including a pump 48 and a valve 50 is interposed in the liquid supply pipe 46. Therefore, when the pump 48 is energized and the valve 50 is opened, the raw material liquid 18 is supplied from the replenishing tank 14 to the suction tank 12.
[0028]
Similarly, from the replenishing tank 14 to the storage tank 16, a liquid feeding pipe 56 interposing a pump 54 is bridged. When the pump 54 is energized, the raw material liquid 18 is transferred from the storage tank 16 to the replenishing tank 14. Supplied.
[0029]
In the above configuration, the suction pump 32, the suction side valve 34, the discharge side valve 38, the liquid level detector 42, the liquid level detector 44, the pump 48, the valve 50 and the pump 54 are respectively connected to the cables 58, 60, 62, The sequence control circuit 74 is connected via 64, 66, 68, 70 and 72.
[0030]
Next, a method for forming a cylinder block sleeve of an automobile engine using a raw material liquid 18 in which alumina fibers and carbon fibers are dispersed in water using the forming apparatus 10 configured as described above will be described.
[0031]
  In this case, the replenishing tank 14 and the storage tank 16 are provided with a raw material liquid 18 in which alumina fibers and carbon fibers are dispersed in water, which is prepared by adding alumina fibers and carbon fibers into water and stirring them. Stored in advance. Therefore, the shaft 28 having the sand sleeve 20 cured by the thermoplastic resin and formed into a cylindrical shape is engaged with the concave portion 22a of the jig 22, and the jig 24 is engaged with the upper end portion of the shaft 28. . Then, the upper end portion of the suction tube 30 a is engaged with the concave portion 22 b of the jig 22. In this state, the shaft 28 is slid downward by the lifting mechanism (not shown), and the jig 22 is placed on the base 26.ListedIf placed, the sand sleeve 20 is disposed in the suction tank 12.
[0032]
Next, the pump 48 is energized, the valve 50 is opened, and the raw material liquid 18 is supplied from the replenishing tank 14 to the suction tank 12. When the liquid level of the raw material liquid 18 in the suction tank 12 reaches the height of the tip of the level sensor 42b of the liquid level detector 42, that is, the storage upper limit of the suction tank 12, the liquid level detector 42 A signal is sent to the sequence control circuit 74. The sequence control circuit 74 that has received this signal via the cable 64 issues a control signal to the pump 48 and the valve 50 via the cables 68 and 70, respectively. By this control signal, the pump 48 is stopped and the valve 50 is closed. As a result, the supply of the raw material liquid 18 from the replenishing tank 14 to the suction tank 12 is stopped. When the supply of the raw material liquid 18 is stopped, the jig 22, the sand sleeve 20 and the jig 24 are immersed in the raw material liquid 18 (see FIG. 1).
[0033]
In this state, the suction side valve 34 is opened, the start switch of the suction pump 32 is turned on to energize the suction pump 32, and the discharge side valve 38 is opened to start suction of the raw material liquid 18. That is, the raw material liquid 18 around the sand sleeve 20 is sucked to the shaft 28 side. The sand sleeve 20 is supported by the shaft 28 while suction is taking place.
[0034]
At this time, the water in the raw material liquid 18 passes through the sand sleeve 20 and then passes through the hole 28c formed in the shaft 28 to the inside 28a of the shaft 28, the communication hole 22c of the jig 22, the suction pipe 30a, The suction pump 32 is sucked through the suction side valve 34, the suction pipe 30b, the flexible hose 36 and the suction pipe 30c, and discharged from the discharge port of the suction pump 32 through the discharge pipe 40 in which the discharge side valve 38 is interposed. Is done.
[0035]
On the other hand, the alumina fibers and carbon fibers in the raw material liquid 18 adhere to the outer peripheral surface of the sand sleeve 20 and are sequentially deposited. As a result, as shown in FIG. 3, a cylindrical layer 76 made of alumina fibers and carbon fibers is formed on the outer peripheral surface of the sand sleeve 20.
[0036]
When alumina fibers and carbon fibers adhere to the sand sleeve 20, the sand sleeve 20 is tightly held between the jig 22 and the jig 24. Does not adhere. Therefore, the layer 76 without a burr | flash part is obtained.
[0037]
Since the raw material liquid 18 in the suction tank 12 is sucked while the layer 76 is formed in this way, the liquid level of the raw material liquid 18 inevitably falls in the suction tank 12. When the liquid level reaches the storage lower limit, this is detected by the level sensor 42 a of the liquid level detector 42, and the liquid level detector 42 sends a signal to the sequence control circuit 74. The sequence control circuit 74 that has received this signal via the cable 64 opens the valve 50 and energizes the pump 48 by a control signal via the cables 68 and 70. As a result, the supply of the raw material liquid 18 from the replenishing tank 14 to the suction tank 12 is started. Therefore, the sand sleeve 20 is not exposed from the raw material liquid 18. That is, the raw material liquid 18 is not insufficient during the formation of the layer 76.
[0038]
By this supply, the level of the raw material liquid 18 in the suction tank 12 rises, and when the level is detected by the level sensor 42b of the liquid level detector 42 to reach the storage upper limit of the suction tank 12. In this case, a signal is sent from the liquid level detector 42 to the sequence control circuit 74. The sequence control circuit 74 that has received this signal via the cable 64 closes the valve 50 and stops the pump 48 by a control signal via the cables 68 and 70. That is, the supply of the raw material liquid 18 to the suction tank 12 is stopped. Therefore, since the raw material liquid 18 is not excessively supplied to the suction tank 12, there is no inconvenience that the raw material liquid 18 overflows from the suction tank 12.
[0039]
Here, the case where the liquid level of the raw material liquid 18 in the replenishing tank 14 reaches the storage lower limit while the raw material liquid is being supplied from the replenishing tank 14 to the suction tank 12 will be described.
[0040]
At this time, the liquid level detector 44 sends a “reservation lower limit” signal to the sequence control circuit 74. However, the sequence control circuit 74 that has received this signal via the cable 66 does not issue a control signal for closing the valve 50 or a control signal for stopping the pump 48. That is, the supply of the raw material liquid 18 to the suction tank 12 is continued until the liquid level detector 42 detects that the liquid level of the raw material liquid 18 in the suction tank 12 has reached the storage upper limit.
[0041]
Therefore, the forming operation of the layer 76 is not interrupted. That is, even when the liquid level detector 44 detects that the liquid level of the raw material liquid 18 in the replenishing tank 14 has reached the storage lower limit during the formation of the layer 76, the raw liquid 18 is sucked into the suction tank 12. In the suction tank 12, the raw material liquid 18 is sucked by the suction pump 32 until a predetermined time elapses. As a result, a layer 76 having a predetermined thickness can be obtained, and the molding yield of the sleeve is improved.
[0042]
Further, in this case, the sequence control circuit 74 that has received the signal generated by the liquid level detector 44 via the cable 66 energizes the pump 54 by the control signal via the cable 72. By this energization, the raw material liquid 18 is supplied from the storage tank 16 to the supply tank 14. When the liquid level detector 44 detects that the liquid level of the raw material liquid 18 in the replenishing tank 14 has reached the storage upper limit of the replenishing tank 14, it passes through the cable 72 generated by the sequence control circuit 74. The pump 54 is stopped by the control signal, and the supply of the raw material liquid 18 is stopped.
[0043]
Thus, by providing the storage tank 16, when the liquid level of the raw material liquid 18 in the replenishing tank 14 reaches the storage lower limit, a new raw material liquid 18 is quickly supplied from the storage tank 16. Therefore, it is not necessary to prepare the raw material liquid 18 in the replenishing tank 14. Moreover, the raw material liquid 18 can be prepared without stopping the molding apparatus 10. For this reason, since it becomes possible to shape | mold a sleeve continuously, production efficiency improves.
[0044]
After a predetermined time has elapsed after starting suction, the discharge valve 38 is closed by a control signal sent from the sequence control circuit 74 via the cable 62, and then the suction pump 32 is stopped by a control signal sent via the cable 58. . Further, the suction side valve 34 is closed by a control signal via the cable 60.
[0045]
Next, the suction pipe 30 a is slid upward by the lifting mechanism (not shown), and the sand sleeve 20 having the outer peripheral surface formed with the layer 76 is exposed from the suction tank 12. When the shaft 28 is detached from the suction pipe 30a, the cylindrically formed layer 76, that is, the sleeve, can be taken out from the molding apparatus 10 together with the jig 22, the jig 24, the shaft 28, and the sand sleeve 20. .
[0046]
In order to make the thickness of the layer 76 uniform, for example, as shown in FIG. 4, so-called rubber press is performed in which the layer 76 is coated with a rubber mold and then pressure is applied to the layer 76 through a liquid. That is, after the layer 76 is covered with the rubber mold 78, the layer 76 and the rubber mold 78 are disposed inside the molding unit 80 of the rubber press device together with the shaft 28, the sand sleeve 20, the jig 22, and the jig 24. Inside the molding portion 80, a pressurizing liquid 82 such as water is stored in advance. For example, the pressurizing liquid 82 is pressed by a piston (not shown). As a result, hydraulic pressure is applied to the entire surface of the layer 76 via the rubber mold 78, and as a result, the layer 76 is pressure-formed to a uniform thickness.
[0047]
Next, in order to improve the strength of the layer 76, the layer 76 is heated together with the shaft 28 and the sand sleeve 20. This heat treatment volatilizes and removes moisture contained in the layer 76, and the layer 76 is cured. As a result, the strength of the layer 76 is improved and a molded body that can be used as a sleeve is obtained.
[0048]
In order to remove the sleeve thus obtained from the shaft 28 and the sand sleeve 20, for example, the sand sleeve 20 is collapsed while being heated. That is, if the shaft 28 and the sand sleeve 20 are heated together with the sleeve at a temperature higher than the temperature at which the layer 76 is heat-treated, the thermoplastic resin contained in the sand sleeve 20 is removed. For this reason, since the strength of the sand sleeve 20 is significantly reduced, if an external force is applied to the sand sleeve 20 at this time, the sand sleeve 20 easily collapses. Since the portion after the sand sleeve 20 collapses becomes a gap, it is easy to separate the cylindrical sleeve and the shaft 28. Thereby, it comes to obtain a sleeve alone.
[0049]
In the above-described embodiment, the molding apparatus 10 is configured by including the storage tank 16 for supplying the raw material liquid 18 to the replenishing tank 14, but the molding apparatus 10 may be configured by removing the storage tank 16. Good.
[0050]
In this case, when the raw material liquid 18 in the replenishing tank 14 reaches the storage lower limit after the raw material liquid 18 is supplied from the replenishing tank 14 to the suction tank 12 before the suction pump 32 is energized, the suction pump 32 is activated. Even if the switch is turned on, the sequence control circuit 74 preferably controls the suction pump 32 so that the suction pump 32 is not energized. By controlling in this way, the situation where the raw material liquid 18 is not supplied to the suction tank 12 during the molding of the sleeve is avoided. In such a case, after the raw material liquid 18 is newly prepared, the new raw material liquid 18 may be supplied to the supply tank 14. Alternatively, the raw material liquid 18 may be prepared in the replenishing tank 14. When the storage layer 16 is not installed, the remaining amount of the raw material liquid 18 in the replenishing tank 14 when the liquid level of the raw material liquid 18 reaches the lower storage limit of the replenishing tank 14 is less than the storage lower limit of the suction tank 12. Needless to say, the capacity is set to be equal to or greater than the capacity up to the storage upper limit.
[0051]
In the above-described embodiment, the supply of the raw material liquid 18 is stopped by opening / closing the valve 50 and energizing / stopping the pump 48. However, the valve 50 is only opened / closed. The supply of the raw material liquid 18 may be stopped. That is, the energizing / stopping of the supply mechanism 52 in the present invention includes a case where the valve 50 is opened / closed with the pump 48 energized.
[0052]
【The invention's effect】
As described above, according to the method for forming a molded body according to the present invention, when the raw material liquid is supplied from the replenishing tank to the suction tank, the liquid level of the raw material liquid in the replenishing tank is stored in the replenishing tank. Even when the lower limit is reached, the supply mechanism for supplying the raw material liquid from the replenishing tank to the suction tank does not stop. That is, the supply of the raw material liquid is continued. Thereby, since a required amount of raw material liquid is reliably supplied to a suction tank, the molded object of predetermined thickness is shape | molded reliably.
[0053]
Further, according to the molding apparatus according to the present invention, when the raw material liquid becomes insufficient while the molded body is formed by sucking the raw material liquid in the suction tank, a necessary amount of the raw material liquid is supplied from the replenishing tank. Supplied reliably. Therefore, the molding operation of the molded body is not interrupted. As a result, a molded body having a predetermined thickness can be obtained with certainty.
[0054]
In the above-described embodiment, the case where a sleeve (cylindrical molded body) for an automobile engine is molded has been described as an example. It is not limited to. That is, it goes without saying that a molded body provided for other uses or a molded body having a shape other than a cylindrical shape may be molded.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a schematic overall configuration of a molding apparatus according to an embodiment.
2 is a schematic longitudinal cross-sectional explanatory view of a jig, a shaft and a sand sleeve arranged in a suction tank provided in the molding apparatus of FIG.
3 is a schematic longitudinal cross-sectional explanatory view showing a state in which a layer made of alumina fibers and carbon fibers is formed on the outer peripheral surface of the sand sleeve of FIG. 2; FIG.
4 is a schematic longitudinal cross-sectional explanatory view showing a state where pressure forming is performed on the layer of FIG. 3 in a rubber press apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Molding apparatus 12 ... Suction tank
14 ... Supply tank 16 ... Storage tank
18 ... Raw material liquid 20 ... Sand sleeve
28 ... shaft 28a ... outer peripheral surface
28b ... hollow interior 28c ... hole
32 ... Suction pump 42, 44 ... Liquid level detector
46, 56 ... Liquid feed pipe 48, 54 ... Pump
50 ... Valve 52 ... Supply mechanism
74 ... Sequence control circuit 76 ... Layer

Claims (5)

A raw material liquid in which a material is dispersed in a solvent is sucked by a suction mechanism through a support member having a hollow portion and provided with a hole communicating with the hollow portion and a porous body surrounding an outer wall of the support member, In the molding method of the molded body in which the solvent is passed through the porous body and the support member and the molded body is provided on the outer wall by attaching the material to the outer wall of the porous body.
The raw material liquid stored in the suction tank and sucked by the suction mechanism, wherein the material dispersed in the raw material liquid is adhered to the outer wall of the porous body is a molded body made of the material in the outer wall,
In the meantime, when the first liquid level detector installed in the suction tank detects that the liquid level of the raw material liquid in the suction tank has reached the storage lower limit of the suction tank, the supply mechanism The raw material liquid is supplied from the replenishing tank to the suction tank by energizing the liquid, and the liquid level of the raw material liquid in the replenishing tank is determined by a second liquid level detector installed in the replenishing tank at the time of the supply. Even if it is detected that the storage lower limit of the replenishing tank has been reached, the supply mechanism continues to be energized to continue the supply, and the liquid level of the raw material liquid in the suction tank is reduced by the first liquid level detector. A method of forming a molded body, wherein the supply of the raw material liquid is stopped by stopping the supply mechanism when it is detected that the upper limit of storage of the suction tank has been reached. In the shaping | molding method of the molded object of Claim 1,
When the second liquid level detector detects that the liquid level of the raw material liquid in the replenishing tank has reached the storage lower limit of the replenishing tank, a supply mechanism different from the supply mechanism is energized. The raw material liquid is supplied from the storage tank to the replenishing tank, and the second liquid level detector detects that the liquid level of the raw material liquid in the replenishing tank has reached the storage upper limit of the replenishing tank. In this case, the supply of the raw material liquid is stopped by stopping the another supply mechanism. In the shaping | molding method of the molded object of Claim 1 or 2,
A method for molding a molded body, wherein the molded body is a cylinder sleeve. Under the action of the suction mechanism, the raw material liquid in which the material is dispersed in the solvent is provided via a support member having a hollow portion and provided with a hole communicating with the hollow portion and a porous body surrounding the outer wall of the support member. In a molding apparatus for a molded body that sucks and passes the solvent through the porous body and the support member and attaches the material to the outer wall of the porous body to provide the molded body on the outer wall.
A suction tank having a support member which has an outer wall which is enclosed Nyo by the porous body,
A suction mechanism for sucking the raw material liquid stored in the suction tank through the porous body and the support member;
A first liquid level detector for detecting the liquid level of the raw material liquid stored in the suction tank;
A replenishing tank for storing the raw material liquid supplied to the suction tank;
A second liquid level detector for detecting the liquid level of the raw material liquid stored in the replenishing tank;
A supply mechanism for supplying the raw material liquid from the replenishing tank to the suction tank via a liquid feeding pipe;
With
The raw material liquid stored in the suction tank is sucked by the suction mechanism, and the material dispersed in the raw material liquid is adhered to the outer wall of the porous body, and the outer wall of the porous body is made of the material. Molding the molded body,
During the molding of the molded body, when the first liquid level detector detects that the liquid level of the raw material liquid in the suction tank has reached the storage lower limit of the suction tank, the supply mechanism is attached. The raw material liquid is supplied from the replenishing tank to the suction tank, and the liquid level of the raw material liquid in the replenishing tank reaches the storage lower limit of the replenishing tank by the second liquid level detector. Even when it is detected that the supply mechanism has not been stopped, the first liquid level detector detects that the liquid level of the raw material liquid in the replenishing tank has reached the storage upper limit of the suction tank. And the supply mechanism is stopped to stop the supply of the raw material liquid. The molding apparatus according to claim 4, wherein
Furthermore, a storage tank for storing the raw material liquid supplied to the replenishment tank,
A supply mechanism different from the supply mechanism for supplying the raw material liquid from the storage tank to the replenishment tank via a liquid feeding pipe;
With
When it is detected by the second liquid level detector that the liquid level of the raw material liquid in the replenishing tank has reached the storage lower limit of the replenishing tank, the other supply mechanism is energized to activate the storage tank. When the second liquid level detector detects that the liquid level of the raw material liquid in the replenishing tank has reached the storage upper limit of the replenishing tank, the second liquid level detector supplies the raw material liquid to the replenishing tank. A molding apparatus characterized in that the supply mechanism is stopped to stop the supply of the raw material liquid.

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