JP3024342B2 - Impregnation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impregnating apparatus for impregnating an impregnating liquid into pores such as a cavity or a pinhole of a casting.

[0002]

2. Description of the Related Art Conventionally, many cast parts for automobiles are manufactured by die casting. Although the die casting method has good productivity, it has a problem that voids such as a cavity and a pinhole are easily formed in a cast product, and the pressure resistance of the cast product is poor. Therefore, for the purpose of improving the pressure resistance of the cast product manufactured by the die casting method, an organic impregnating liquid such as a thermosetting resin is impregnated into the pores such as a cavity or a pinhole, and the impregnating liquid is used. An impregnation process for curing is performed.

As an impregnating apparatus for performing the impregnating treatment, an impregnating tank having an impregnating liquid for immersing a casting, a storage tank communicating with the impregnating tank via a pipe having a solenoid valve, the impregnating tank and the storage tank, A vacuum pump provided in communication with an exhaust pipe having an electromagnetic valve, and one end communicating with the storage tank and the impregnation tank, and the other end communicating with the atmosphere, and an atmosphere opening passage having an electromagnetic valve. It is composed of

[0004] When impregnating a cast product,
A casting is put into the impregnation tank, and the inside of the impregnation tank is sealed.
At this time, the impregnating liquid is stored in the storage tank. Next, the vacuum pump is operated, and the solenoid valve of the exhaust pipe communicating the impregnation tank and the vacuum pump is opened, the pressure in the impregnation tank is reduced, and the air remaining in the holes of the casting is completely removed. Subsequently, after confirming that the inside of the impregnation tank has reached a predetermined degree of pressure reduction, the solenoid valve of the pipe connecting the impregnation tank and the storage tank is opened, and the impregnation liquid in the storage tank is subjected to the differential pressure between the storage tank and the impregnation tank. , The casting is immersed in the impregnation liquid, and the impregnation liquid penetrates into the pores. Then, after waiting for the required time, stop the vacuum pump, close the solenoid valve of the exhaust path that connects the vacuum pump and the impregnation tank, open the solenoid valve of the atmosphere open passage that connects the impregnation tank and the outside world, and open the inside of the impregnation layer. Release to atmosphere. Furthermore, the vacuum pump is operated, the solenoid valve of the exhaust pipe connecting the storage tank and the vacuum pump is opened, the other solenoid valves are closed, and the impregnation liquid in the impregnation tank is returned to the storage tank by the pressure difference between the impregnation tank and the storage tank. Thereafter, the casting is taken out of the impregnation tank, and the impregnated casting is left in a heated atmosphere to cure the impregnating liquid in the pores of the casting, thereby performing the impregnation on the pores. Was.

[0005] When the impregnation treatment is repeatedly performed as described above, impurities such as metal powder and cutting oil adhering to the cast product are mixed into the impregnation liquid. Then, the impurities react with the impregnating liquid, and the impregnating liquid undergoes a polymerization reaction. As a result, the viscosity of the impregnating liquid increases, the impregnation property of the pores of the casting becomes poor, and the sticky impregnating liquid adheres to the piping of the impregnating apparatus, and as a result, the piping is clogged, and the apparatus is damaged. There is a risk of damage. Therefore, in order to remove the impurities, the impregnating liquid has been manually extracted by an operator and filtered to remove the impurities. However, this is often due to the manual work of the operator, which consumes a great deal of time in the work of removing impurities, not only deteriorating the productivity but also causing the polymerization reaction to proceed during the treatment and deteriorating the impregnating liquid. I will.

Therefore, as a technique for easily removing impurities from the impregnating liquid, for example, an apparatus as shown in Japanese Utility Model Application Laid-Open No. 63-69541 is used. This prior art will be described with reference to FIG. In FIG. 2, an impregnation tank main body 101 is installed on a floor 102, and is provided so as to store the impregnating liquid A therein.
03 is above the impregnation tank body 101,
Suspended vertically so as to cover the impregnation tank body 1
01 and the upper lid 102 together form one impregnation tank 119. The upper lid 103 is formed in a bell shape, and can define a relatively large closed space between the upper lid 103 and the impregnation tank main body 101. A pipe 105 having one end connected to the vacuum pump 104 extends from the upper lid 103, and a branch pipe 106 having one end open to the outside is connected in the middle of the pipe 105. Further, piping 105
An electromagnetic valve 107 is provided on the side of the vacuum pump 104 from the branch pipe 106. An electromagnetic valve 108 is also provided in the middle of the branch pipe 106, and the sealing formed by the impregnation tank main body 101 and the upper lid 103 by switching these two electromagnetic valves 107 and 108 and operating the vacuum pump 104. The space is decompressed or opened to the atmosphere as appropriate. The shaft 109 is moved from the cylinder 120 to the upper lid 1.
A pallet 110 is attached to the lower end of the shaft 109 so as to extend through the ceiling of the cover 03 into the upper lid 103. The pallet 110 serves to hold the casting W, and maintains a state in which the lower surface is positioned slightly above the upper end of the impregnation tank main body 101 and a state in which it is completely immersed in the impregnation liquid A. The ascending end and the descending end are determined by the cylinder 120 so as to be possible. A filter device 111 is disposed below the impregnation tank main body 101 at a predetermined distance parallel to the bottom surface of the impregnation tank main body 101 and covers the entire cross section of the impregnation tank main body 101. I have. The filter device 111 includes two upper and lower punching metals 112a,
12b, a filter 113 is held, and an air passage 114 is formed in the center of the filter 113.
It is removably mounted on a ring-shaped support member 115 protruding from the inner wall. On the other hand, an air pipe 116 connecting one end to an air source (not shown) is provided below the filter device 111.
Are provided. A dehumidifier 117 and a solenoid valve 118 are provided in the middle of the air pipe 116. When the solenoid valve 118 is opened, the impregnation tank main body 1 is opened.
In the impregnating liquid A of No. 01, dry air is supplied.

[0007] The operation of the prior art thus configured will be described below. First, the casting W is placed on the pallet 110 with the upper lid 103 opened, and then the upper lid 103 is lowered to cover the impregnation tank main body 101.
Next, the vacuum pump 104 is operated, the electromagnetic valve 107 is opened, the electromagnetic valve 108 is closed, and the pressure in the impregnation tank 119 is reduced. At this time, the pallet 110 containing the casting W is filled with the impregnating liquid A.
It is located above, so that air remaining in both the pores of the casting W and the impregnating liquid A is removed. Next, the pallet 11 is operated by the operation of the cylinder 120.
0 is lowered, and the entire casting W is immersed in the impregnating liquid A. By this immersion, the impregnating liquid A penetrates into the pores of the casting W. After a predetermined time, the vacuum pump 104 is stopped, the electromagnetic valve 107 is closed, the electromagnetic valve 108 is opened, and the inside of the impregnation tank 119 is opened to the atmosphere. By this opening to the atmosphere, the impregnating liquid A further penetrates into the pores of the casting W. The pallet 110 is raised again by the operation of the cylinder 120,
At the same time, the upper lid 103 is also raised, and the pallet 110
The cast product W is taken out from the furnace, left in a heating atmosphere, and the impregnating liquid A is cured, thereby completing a series of impregnation processes. here,
The electromagnetic valve 118 is opened to supply air into the impregnating liquid A, and the supplied air is supplied to the air passage 11 of the filter device 111.
The impregnating liquid A is bubbled by passing upward from No. 4. As a result, convection occurs in the impregnating liquid A. At this time, the impregnating liquid A containing impurities moves to the bottom of the impregnating tank main body 101 through the filter device 111 and is suspended in the impregnating liquid A during this time. The impurities are captured by the filter 113.

[0008]

However, since the filter device 111 itself is immersed in the impregnating solution A, the impregnating solution A reacts with impurities trapped in the filter device 111 to cause a polymerization reaction. . Thereby, the deterioration of the impregnating liquid A is promoted, the viscosity of the impregnating liquid A increases, and there is a problem that the impregnation property of the pores of the casting becomes poor. Therefore, an object of the present invention is to provide an impurity removing device in a series of impregnating liquid flow paths independently of an impregnating tank, thereby delaying impregnating liquid deterioration and efficiently removing impurities in the impregnating liquid. And

[0009]

In the impregnating apparatus of the present invention, the impregnating treatment is carried out by immersing the casting in which the air in the pores has been removed into the impregnating liquid stored in the impregnation tank. An impregnating apparatus for communicating with the impregnating tank via a discharge path to remove impurities in the impregnating liquid; and an impregnating liquid communicating with the impurity removing apparatus and removing the impurities from the impregnating tank. And a flow device for flowing the impregnating liquid from the impregnating tank to the impurity removing tank, and flowing the impregnating liquid from which the impurities have been removed by the impurity removing device to the impregnating tank from the impurity removing apparatus. It is provided.

[0010]

When removing impurities from the impregnating liquid, the fluidizing device is operated to introduce the impregnating liquid in the impregnating layer into the impurity removing apparatus via the discharge path, thereby removing the impurities in the impregnating liquid. After that, the impregnated liquid from which impurities have been removed is returned to the impregnation tank via the delivery path. By providing the impurity removing device independently of the impregnating tank in a series of impregnating liquid flow paths, the impregnating liquid and the impurity removing device are not normally contacted, and the impregnating liquid can be degraded in a delayed manner. In addition, since the flow of the impregnating liquid is automated, impurities can be efficiently removed from the impregnating liquid.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a cross-sectional view illustrating an impregnating apparatus according to the present invention. An impregnating tank main body 1 is installed on a floor via a bracket, a pedestal, and the like (not shown), and is provided to accommodate an impregnating liquid A. An upper lid 2 is provided above the impregnation tank main body 1 and is vertically movably suspended so as to cover the impregnation tank main body 1. One impregnation tank 24 is formed. The upper lid 2 is formed in a bell shape, and when covered with the impregnation tank main body 1, a relatively large sealed space K can be defined between the upper lid 2 and the impregnation tank main body 1. A shaft 3 is movably provided on the upper lid 2, extends from the cylinder 25 through the ceiling of the upper lid 2 to the inside of the upper lid 2, and a pallet 4 of a frame is attached to a lower end thereof. The pallet 4 serves to hold the casting W, and maintains a state in which the lower surface is positioned slightly above the upper end of the impregnation tank main body 1 and a state in which it is completely immersed in the impregnation liquid A. The ascending end and the descending end are determined by the cylinder 25 so as to be possible. At the inner bottom of the impregnation tank body 1, one end of a discharge path 11 for discharging the impregnating liquid A to the outside of the impregnation tank body 1 is provided, and the other end of the discharge path 11 opens to the impurity removal tank 7. The first solenoid valve 13 is provided on the way. At the bottom of the impurity removing tank 7, a concave impurity accumulating portion 12 is provided. In the impurity accumulating portion 12, impurities 5 such as metal powder having a higher specific gravity than the impregnating liquid A are accumulated. Has become. A communication passage 26 for returning the impregnating liquid A to the impregnating tank main body 1 is provided at the inner bottom of the impurity removing tank 7.
Is provided at one end thereof, and a second solenoid valve 14 is provided in the middle of the one end. At the other end of the communication path 27, an impurity filtering device 6 accommodating a filter 9 having a hole diameter of about 1 μm in the case 8 is provided in communication. These impurity removing tank 7 and impurity filtering device 6,
The communication path 27 forms an impurity removing device 26. In addition, the other end of the impregnation tank 1
Is provided in communication with the delivery path 10. On the other hand, a first air pipe 20 connected to the vacuum pump 19 is detachably provided on the upper lid 2 via a packing 28 so as to be opened when the upper lid 2 is raised and to be connected when the upper lid 2 is covered. A third solenoid valve 15 is provided on the way. On the upper lid 2 side of the first electromagnetic pipe 15 with respect to the third electromagnetic valve 15, a first atmospheric release pipe 22 having a first atmospheric release electromagnetic valve 17 is disposed. A second air pipe 21 connected to a vacuum pump 19 extends from the impurity removing tank 7, and a fourth electromagnetic valve 16 is provided in the middle thereof.
Is provided. Further, a second air release pipe 23 having a second air release electromagnetic valve 18 is disposed on the second air pipe 21 closer to the impurity removal tank 7 than the fourth electromagnetic valve 16. These vacuum pump 19 and air pipe 2
0, 21 and open air piping 22, 23 and solenoid valves 15, 16
Further, a flow device for flowing the impregnating liquid A is constituted by the air release solenoid valves 17 and 18.

When impregnating the cast product W with the impregnating apparatus configured as described above, first, the cylinder 25 is operated, and is conveyed by a conveying device (not shown) with the upper lid 2 opened. The incoming casting W is transferred to the pallet 4. Thereafter, the cylinder 25 is reversely operated, and the upper lid 2 is moved downward to cover the impregnation tank main body 1. At this time, a sealed space K is formed by the impregnation tank main body 1 and the upper lid 2. Next, the vacuum pump 19 is operated, the third solenoid valve 15 is opened, and the other solenoid valves 1 are opened.
3, 14, 16, 17, and 18 are closed, and the pressure in the impregnation tank 24 is reduced. At this time, the pallet 4 on which the casting W is placed is positioned on the impregnating liquid A, whereby air is removed from the holes of the casting W. And the cylinder 25
, The pallet 4 is lowered, the casting W is immersed in the impregnating liquid A, the vacuum pump 19 is stopped after waiting for a predetermined time, the third solenoid valve 15 is closed, and the first air opening solenoid valve 1 is opened.
7 is opened to open the closed space K in the impregnation tank 24 to the atmosphere. Thereby, the impregnating liquid A is pushed by the differential pressure, and further penetrates into the pores of the casting W. Waiting for the inside of the impregnation tank to be opened to the atmosphere, the pallet 4 is raised again by the operation of the cylinder 25, and at the same time, the upper lid 2 is also raised to take out the casting W from the pallet 4. Thereafter, the casting W Is left in a heated atmosphere to cure the impregnating liquid A to complete a series of impregnation treatments. When the impregnation process is repeatedly performed on the casting W as described above, the impurities 5 such as cutting oil and metal powder adhering to the casting W are mixed into the impregnation liquid A. Then, when removing the impurities 5 from the impregnating liquid A,
First, the vacuum pump 19 is operated, and at the same time, the first solenoid valve 13 and the fourth solenoid valve 16 are opened, and the other solenoid valves 14, 15,
17 and 18 are closed, and the impregnating liquid A in the impregnating tank main body 1 is moved to the impurity removing tank 7 via the discharge path 11. Impregnating liquid A
After confirming the movement of the impurity removal device 7, the vacuum pump 19 is stopped, and the second air release electromagnetic valve 18 is released to the atmosphere.
Open the inside to the atmosphere. By keeping this state stationary for a certain period of time, the impurities 5 such as metal powder having a higher specific gravity than the impregnating liquid A in the impregnating liquid A in the impurity removing tank 7 are transferred to the impurity accumulating section 12 provided below the impurity removing tank 7. Settles. Next, the vacuum pump 19 is operated, the second solenoid valve 14 and the third solenoid valve 15 are opened, and the other solenoid valves 13, 16, 17, and 18 are closed. A moves to the impregnated layer main body 1 via the communication path 27, the impurity filtering device 6, and the delivery path 10.

At this time, the impurities 5 having a lower specific gravity than the impregnating liquid such as the cutting oil which could not be completely removed by the impurity removing tank 7 in the impregnating liquid A by the filter 9 provided in the impurity filtering device 6 are removed. Thereby, the impurities in the impregnating liquid A are completely removed. By providing an impurity removing device 26 for removing impurities from the impregnating liquid A independently from the impregnating tank 24 and by providing it on a series of impregnating liquid A flow paths, deterioration of the impregnating liquid A is delayed, and efficiency is reduced. The impurity 5 can be removed from the impregnating liquid A well, and workability is improved. Further, impurities 5 having a higher specific gravity than the impregnating liquid A are removed in the impurity removing tank 7, and furthermore,
Then, the configuration in which the other impurities 5 are filtered by the impurity filtering device 6 not only allows the impurities to be reliably removed, but also extends the life of the filter 9 of the impurity filtering device 6 and eliminates the need for filter replacement.

[0014]

According to the present invention, an impurity removing device for removing impurities from an impregnating liquid is provided independently of an impregnating tank, and is provided on a flow path of a series of impregnating liquids. No longer touches,
By automating the flow of the impregnating liquid, impurities can be efficiently removed from the impregnating liquid. Thereby, the deterioration of the impregnating liquid can be delayed, and the productivity is improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of the present invention.

FIG. 2 is a front view showing a configuration of a conventional technique.

[Explanation of symbols]

 A: Impregnating liquid W: Cast product K: Sealed space 1 ... Impregnation tank body 2 ... Top lid 3 ... Shaft 4 ... Pallet 5 ... Impurity 6 ... Impurity Filtration device 7 ... Impurity removal tank 8 ... Case 9 ... Filter 10 ... Delivery path 11 ... Discharge path 12 ... Impurity accumulation unit 13 ... First solenoid valve 14 ... · Second solenoid valve 15 ··· Third solenoid valve 16 ··· Fourth solenoid valve 17 ··· First air release solenoid valve 18 ··· Second air release solenoid valve 19 ··· Vacuum pump 20 ・ ・ ・ First air pipe 21 ・ ・ ・ Second air pipe 22 ・ ・ ・ First open air pipe 23 ・ ・ ・ Second open air pipe 24 ・ ・ ・ Impregnation tank 25 ・ ・ ・Cylinder 26 ... Impurity removing device 27 ... Communication path 28 ... Packing 101 ... Impregnation tank body 102 ... Lower 103 ・ ・ ・ Top lid 104 ・ ・ ・ Vacuum pump 105 ・ ・ ・ Pipe 106 ・ ・ ・ Branch pipe 107 ・ ・ ・ Solenoid valve 108 ・ ・ ・ Solenoid valve 109 ・ ・ ・ Shaft 110 ・ ・ ・ Pallet 111 ・ ・ ・ Filter Device 112a: Punching metal 112b: Punching metal 113: Filter 114: Air passage 115: Ring-shaped support member 116: Air pipe 117: Dehumidifier 118: Solenoid valve 119: impregnation tank 120: cylinder

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-26786 (JP, A) JP-A-62-130202 (JP, A) JP-A-59-150655 (JP, A) 25364 (JP, U) Japanese Utility Model 2-122036 (JP, U) Japanese Utility Model Sho 63-66136 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 29/00

Claims (1)

(57) [Claims] 1. An impregnating apparatus for impregnating a cast product from which air in pores has been removed is immersed in an impregnating liquid stored in an impregnation bath, so that a discharge passage is provided in the impregnation bath. An impurity removing device for removing impurities in the impregnating solution, communicating with the impurity removing device, and a delivery path for returning the impregnating solution from which impurities have been removed to the impregnating tank; and impregnating the impregnating solution with the impregnating solution. Flowing from the tank to the impurity removal tank,
A flow device for flowing the impregnating liquid from which impurities have been removed by the impurity removing device to the impregnation tank from the impurity removing device.