JP2005349440A - Facing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a facing apparatus for spreading a refractory material on the required portions of a core to be buried in a casting mold, which facing apparatus has high working efficiency and is economical. <P>SOLUTION: Because the facing apparatus 1 can nearly automatically and surely spread the refractory material on the required portions by putting a workpiece 31 on a workpiece putting stand 13, the working efficiency can be improved. In addition, when the paint has been excessively supplied, surplus paint flows out from a paint over-flow port 16 of a paint container 14 and returns to a paint tank 3. Therefore, it is not necessary to accurately set a timer for controlling the supply of pressurized air, and the facing apparatus is economical because the paint is not uselessly spent. Further, the facing apparatus can cope with the supply of a large quantity of cores by arranging a plurality of the workpiece putting stands 13 in parallel with each other and by arranging paint supply pipes 12 on the respective workpiece putting stands 13 respectively if necessary. Further, when the workpieces 31 are put on the workpiece putting stands 13, the working efficiency can be furthermore improved because the workpieces can be simply positioned by inserting positioning rods into positioning pipes 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coating apparatus for applying a refractory agent to a necessary portion of a core embedded in a mold.

Conventionally, a refractory agent has been applied to the core embedded in the mold by brushing or dipping. In the case of brush painting, work efficiency is low. Moreover, in the case of immersion, it may apply | coat to an unnecessary part and it was not economical, such as a uselessness of a coating material. Furthermore, there is a demand for a large supply of cores from the viewpoint of mass production of parts.
None

  The present invention has been made to meet the above-described demand, and an object thereof is to provide an economical coating apparatus with high work efficiency.

  In order to achieve the above object, a coating apparatus according to claim 1, wherein a workpiece mounting table that surrounds a coating surface of a workpiece to be mounted and is substantially sealed, and the workpiece mounting table is disposed above a sealed upper lid. A paint tank, a paint supply pipe that is inserted and supported by the hermetically sealed upper lid, and whose upper end communicates with the work mounting table, and whose lower end faces the bottom of the paint tank, and the paint tank's hermetically sealed lid and paint liquid A pressurized air supply means for supplying pressurized air between the surfaces, and a control means for controlling the driving of the pressurized air supply means at the timing of placing the work on the work placing table. To do.

  According to a second aspect of the present invention, there is provided the coating apparatus according to the first aspect, wherein a seal member is disposed on the periphery of the upper end opening of the workpiece mounting table, and a paint overflow port is provided in the upper end opening. The paint overflowing from the overflow port is received by forming the hermetically sealed upper lid in a funnel shape, and the paint reflux port for refluxing the paint to the paint tank on the hermetically sealed upper lid, and the paint reflux port by the weight of the weight A rotating lid that rotates and seals from below is provided, and when the weight of the paint received by the rotating lid exceeds the weight of the weight, the rotating lid rotates to open the paint reflux port. It is characterized by that.

  According to a third aspect of the present invention, there is provided a coating apparatus according to the first or second aspect, wherein a plurality of the work mounting bases are provided side by side, and the paint supply pipe is provided on each of the work mounting bases. Features.

  According to a fourth aspect of the present invention, there is provided a coating apparatus according to any one of the first to third aspects, further comprising positioning means for engaging the hermetic upper lid and the workpiece in an uneven relationship. Features.

  According to the coating apparatus of claim 1, when a workpiece is placed on the workpiece mounting table, the application surface of the workpiece is substantially sealed by the workpiece mounting table. The pressurized air supply means is driven at the mounting timing, and pressurized air is supplied between the hermetically sealed upper lid of the paint tank and the liquid level of the paint. By supplying this pressurized air, the liquid level of the paint in the paint supply pipe blows up and rises to the workpiece mounting table. And a coating material is apply | coated to the application surface of the workpiece | work sealed substantially by this workpiece | work mounting base. Accordingly, by placing the workpiece on the workpiece mounting table, it is possible to reliably and automatically apply the necessary portion to the required portion, so that the work efficiency can be improved. In addition, since it is applied only to the application surface that is substantially sealed by the work table and is not applied to unnecessary parts, it is economical without wasting paint.

  According to the coating device of the second aspect, the paint overflowing from the paint overflow port is received by the funnel-shaped hermetically sealed upper lid and collected on the paint reflux port sealed by the rotating lid. When the weight of the accumulated paint exceeds the weight of the weight supporting the rotating lid, the rotating lid rotates to open the paint reflux port and return to the paint tank. Even if the paint is supplied excessively, it flows out from the paint overflow port and returns to the paint tank, so there is no need to set the timer time of the timer for controlling the supply of pressurized air with high accuracy and the paint is wasted. It is economical without any problems.

  The coating apparatus according to claim 3 can meet a demand for supplying a large number of cores since a plurality of work placement tables are provided and the paint supply pipes are arranged on each work placement table.

  In addition, according to the coating apparatus of the fourth aspect, since the positioning means that engages the sealing upper lid and the workpiece in a concave-convex relationship is provided, the workpiece can be easily positioned on the workpiece mounting table. Therefore, the working efficiency can be further increased.

  For the purpose of providing an economical coating apparatus with high work efficiency, when a workpiece is placed on the workpiece mounting table, the application surface of the workpiece is substantially sealed by the workpiece mounting table, and the timing of this loading. Then, the pressurized air supply means is driven, and pressurized air is supplied between the sealing upper lid of the paint tank and the liquid level of the paint, and the supply of the pressurized air raises the liquid level of the paint in the paint supply pipe. This was realized by reaching the mounting table and applying the paint to the application surface of the workpiece which was substantially sealed by the workpiece mounting table.

  A coating apparatus 1 of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of the coating apparatus 1, and FIG. 2 is a cross-sectional view taken along line AA in FIG. A paint tank 3, an air tank 4, and a control panel 5 are installed on the base 2 of the coating device 1. The base 2 is movable with wheels 6 attached thereto. A hermetic upper lid 7 is attached to the upper surface opening of the paint tank 3 and is hermetically closed. The hermetically sealed upper lid 7 is formed in a funnel shape whose central portion is lower than the outer peripheral portion. A paint reflux port 8 is formed at the center.

  A rotating lid 9 that seals the paint reflux port 8 is rotatably supported by a hinge 10 attached to the back side of the sealing upper lid 7. A weight 11 is attached to the rotating lid 9 with a hinge 10 in between. The rotating lid 9 is rotated by the weight of the weight 11 to seal the paint reflux port 8 from below. When the weight of the paint received by the rotating lid 9 exceeds the weight of the weight 11, the rotating lid 9 rotates to open the paint reflux port 8.

  Further, six paint supply pipes 12 are inserted and supported in the sealed upper lid 7 substantially vertically. Two paint supply pipes 12 arranged at a predetermined interval are arranged in two rows symmetrically, and a workpiece mounting table 13 is attached to the upper end of each of the six paint supply pipes 12. The work mounting table 13 also serves as a paint bowl 14 for collecting paint that is supplied from the paint supply pipe 12 and blows up. The plan view shape of the paint basket 14 is a baseball-like base base shape, and a rubber or synthetic resin seal member 15 is fitted to the periphery of the upper end opening. And the paint overflow port 16 is formed in the predetermined location of the periphery. A filter 17 is attached to the lower end of the paint supply pipe 12 and faces the vicinity of the bottom surface in the paint tank 3.

  The periphery of the hermetically sealed upper lid 7 is surrounded by a cylindrical wall 18. Four positioning pipes 20 are erected between the inward flange 19 formed on the cylindrical wall 18 and the sealing upper lid 7. A stirrer 21 that stirs the paint is attached to the side surface of the paint tank 3. The stirrer 21 has a stirring propeller 23 attached to the lower end of an obliquely downward stirring shaft 22 connected to a stirring motor 21a. Further, a pressurized air supply hole 24 is formed in the upper part of the side surface of the paint tank 3.

  The pressurized air supply hole 24 and the air tank 4 are connected by a pressurized air supply pipe 25. An electromagnetic valve 26 is interposed in the pressurized air supply pipe 25. When the electromagnetic valve 26 is turned on and switched, the paint tank 3 and the air tank 4 communicate with each other, and pressurized air is supplied to the paint tank 3 through the pressurized air supply pipe 25. When the solenoid valve 26 is turned off and switched, the air tank 4 side of the pressurized air supply pipe 25 is closed, and the paint tank 3 communicates with the atmosphere.

  The control panel 5 drives an air pump (not shown) for supplying pressurized air to the air tank 4, a control circuit for controlling on / off of the stirrer 21, the electromagnetic valve 26, a timer, a relay, and the coating device 1. A switch or the like (both not shown) are provided. Since each of these devices and the stirring motor 21a of the stirrer 21 use a refractory agent in which a flammable solvent is mixed with graphite-based alumina as a paint, an explosion-proof type is used.

  FIG. 3 is a plan view of the work 31 placed on the work placement table 13. The work 31 is provided with six cores 32 embedded in a mold, and is formed on six bases 34 respectively disposed on both the front and back surfaces of the substrate 33. Each base 34 is arranged in accordance with the paint bowl 14 and is fitted in a substantially hermetically sealed manner by a seal member 15 fitted in the upper end opening of the paint bowl 14 when the work is placed (FIG. 4). reference). In addition, positioning shafts 35 that are fitted into the four positioning pipes 20 are disposed at the four corners of the front and back surfaces of the substrate 33.

  When the positioning shaft 35 is fitted into the positioning pipe 20 and the work 31 is placed on the work placing table 13, the base 34 on which the cores 32 are formed is fitted into the paint bowl 14 in a substantially sealed manner. At this timing, the electromagnetic valve 26 is turned on by a detection signal from a manual or a workpiece placement detection sensor (not shown). When the solenoid valve 26 is turned on and switched, the paint tank 3 and the air tank 4 communicate with each other, and the pressurized air is supplied between the hermetically sealed lid 7 of the paint tank 3 and the paint liquid level through the pressurized air supply pipe 25. The By supplying this pressurized air, the liquid level of the paint in each paint supply pipe 12 blows up and rises. Then, as the paint rises, the air in the paint supply pipe 12 is exhausted from the paint overflow port 16 formed in the paint bowl 14, and then the paint bowl 14 is filled with the paint. As a result, the paint is applied to the core 32 fitted in the paint bowl 14.

  On the other hand, the paint that has been excessively supplied following the supply of pressurized air flows out from the paint overflow port 16 onto the sealed upper lid 7. At this time, the paint reflux port 8 at the center of the sealed upper lid 7 is sealed by a rotating lid 9 on which the pressure of pressurized air and the weight of the weight 11 act. The supply of pressurized air is controlled by a timer. When the set timer time elapses, the solenoid valve 26 is turned off and switched, the air tank 4 side of the pressurized air supply pipe 25 is closed, and the paint tank 3 communicates with the atmosphere. To do. When the pressurized air is exhausted to the atmosphere, the paint in the paint bowl 14 descends through the paint supply pipe 12 and returns to the paint tank 3. Subsequently, the work 31 is turned over and placed on the work placing table 13, and paint is applied to the core 32 on the back side.

  When the weight of the paint that flows out from the paint overflow port 16 of the paint bowl 14 and accumulates on the hermetic upper lid 7 exceeds the weight of the weight 11 that supports the rotary lid 9, the rotary lid 9 rotates and the paint The reflux port 8 is opened and refluxed to the paint tank 3.

  Since the coating apparatus 1 having the above-described configuration and operation can be applied to a necessary part almost automatically by placing the work 31 (core 32) on the work placing table 13, work efficiency can be improved. be able to. Further, even if the paint is supplied excessively, it flows out from the paint overflow port 16 of the paint bowl 14 and returns to the paint tank 3, so that it is necessary to set the timer time of the timer for controlling the supply of pressurized air with high accuracy. In addition, it is economical without wasting paint.

Further, if necessary, a plurality of workpiece mounting tables 13 are provided, and a paint supply pipe 12 is provided on each workpiece mounting table 13 to meet the demand for supplying a large number of cores. Furthermore, regarding the placement of the workpiece 31 on the workpiece mounting table 13, since the positioning can be easily performed by fitting the positioning shaft 35 into the positioning pipe 20, the working efficiency can be further improved.
Note that the versatility of the coating apparatus can be enhanced by changing the shape and number of the coating bowls 14 as the workpiece mounting table according to the shape of the workpiece.

It is a top view of a coating type apparatus. It is the sectional view on the AA line in FIG. It is a top view of a workpiece | work. It is the expanded sectional view which showed the mounting state of the workpiece | work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coating device 3 Paint tank 4 Air tank 5 Control panel 7 Sealing top lid 8 Paint return port 9 Rotating lid 11 Weight 12 Paint supply pipe 13 Workpiece mounting table 14 Paint bowl 15 Seal member 16 Paint overflow port 20 Positioning pipe 25 Pressurization Air supply pipe 26 Solenoid valve 31 Work piece 32 Core 35 Positioning shaft

Claims (4)

A workpiece mounting table that surrounds the coating surface of the workpiece to be mounted and substantially seals it;
A paint tank in which the work mounting table is disposed above the hermetically sealed upper lid;
A paint supply pipe that is inserted and supported by the hermetically sealed upper lid, communicates with the workpiece mounting table at the upper end, and faces the bottom of the paint tank near the bottom surface;
Pressurized air supply means for supplying pressurized air between the hermetically sealed lid of the paint tank and the liquid level of the paint;
A coating apparatus comprising control means for controlling the driving of the pressurized air supply means at the timing of placing a work on the work placing table.   A seal member is disposed on the periphery of the upper end opening of the workpiece mounting table, a paint overflow port is provided in the upper end opening, and the paint overflowing from the paint overflow port is formed in the funnel shape of the hermetically sealed upper lid. The paint upper opening is provided with a paint return opening for returning the paint to the paint tank, and a rotation cover for turning the paint return opening according to the weight of the weight to seal from the lower side. The coating apparatus according to claim 1, wherein when the weight of the coating material received exceeds the weight of the weight, the rotating lid rotates to open the coating material reflux port.   The coating apparatus according to claim 1 or 2, wherein a plurality of the work mounting tables are provided, and the paint supply pipe is disposed on each of the work mounting tables.   The coating apparatus according to any one of claims 1 to 3, wherein positioning means that engages the sealing upper lid and the workpiece in an uneven relationship is provided.

Images