JPH09168850A - Coating agent coating device of core for centrifugal casting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly and efficiently coat a coating agent on the outer peripheral face of a core for a centrifugal casting machine without deteriorating surrounding environment. SOLUTION: The device has coating equipment 9 to coat a coating agent on the outer peripheral face of a core 2 for a centrifugal casting machine, a core carrying in device 10 to carry in the core 2 up to the coating equipment 9 and a core carrying out device 11 to carry out the core 2 from the coating equipment 9, the coating equipment 9 has a rotary plate 13 to rotation-drive around the horizontal axis, a drive device 19 arranged to the rotary plate 13, plural clamp members 34 mounted to a drive shaft of the drive device 19 and movable in the radial direction of the drive shaft and a nozzle for injecting the the coating agent. The coating agent is injected to the the core 2 carried in with the core carrying in device 10 by the coating agent injection nozzle and the core 2 coated with the coating agent is transferred to the core carrying out device 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating agent applying device for uniformly and efficiently applying a coating agent to the outer peripheral surface of a core for a centrifugal casting machine.

[0002]

2. Description of the Related Art In a centrifugal casting machine, as shown in FIG.
After fitting the core 2 to the end of the mold 1, while pouring the molten metal into the mold 1, the mold 1 is rotated at high speed, and the centrifugal force generated thereby causes casting along the inner peripheral surface of the mold 1. 3 is to be molded.

As shown in FIG. 14, the core 2 has a substantially cylindrical core body 2a, a flange portion 2b integrally projecting from the base end of the outer peripheral surface of the core body 2a, and the core body. 2a has a plurality of ribs 2c projecting from the inner peripheral surface at predetermined intervals in the circumferential direction, and in order to prevent the core 2 from sticking to the mold 1, a rib is formed from the outer peripheral surface of the core body 2a. The mold wash 4 is applied to the back surface of the portion 2b.

Conventionally, when the mold coating agent 4 is applied to the core 2, as shown in FIG. 15, after the core 2 is mounted upward, the core 2 is rotated and the spray gun 6 sprays the mist. 16 is sprayed (spray type), or as shown in FIG. 16, the core 2 is submerged in the mold coating agent 4 stored in the container 7 (drip type). .

[0005]

In the conventional spray-type and doppling-type, the coating operation of the coating agent 4 is carried out manually, and particularly when the core 2 of small diameter is manufactured by a core making machine. ,
Since multiple cores 2 are manufactured at one time, the multiple cores 2
It takes a lot of time to apply the mold coating agents 4 one by one, and the time per cycle required for the application becomes long. Further, the outer peripheral surface of the core 2 is brushed to remove excess coating agent 4 to evenly apply the coating agent 4 to the outer peripheral surface of the core 2 for finishing. It requires skill and it is difficult to apply the mold wash 4 evenly. Furthermore, the coating agent 4
Will be scattered around and will worsen the environment.

In view of the above problems, the present invention is capable of uniformly and efficiently applying a mold coating agent to the outer peripheral surface of a centrifugal casting machine core without deteriorating the surrounding environment. An object of the present invention is to provide a coating device.

[0007]

In order to achieve the above object, the present invention provides coating equipment for coating a mold casting agent on the outer peripheral surface of a core for a centrifugal casting machine, and carrying the core into the coating equipment. And a core unloading device for unloading the core from the coating facility, wherein the coating facility is a rotating body that can be rotationally driven about a horizontal axis, and the rotating body. A drive device disposed on the drive device, a plurality of clamp members attached to the drive shaft of the drive device and movable along the radial direction of the drive shaft, and a nozzle for spraying a coating agent. The core carried in by the carry-in device is fitted to the plurality of clamp members, the plurality of clamp members are moved radially outward to clamp the core from the inner peripheral surface thereof, and the rotating body is predetermined upward. Rotate it by an angle to tilt the core downward, While rotating the core through the member, spray the mold coating agent from the mold coating agent injection nozzle, apply the coating agent to the outer peripheral surface of the core, and rotate the rotating body upward a predetermined angle It is characterized in that the core coated with the mold wash is delivered to the core unloading device.

In the above structure, after the core is loaded into the coating equipment by the core loading device, the core is fitted into the plurality of clamp members, and the plurality of clamp members are moved radially outward. The core is clamped from its inner peripheral surface, the rotating body is rotated upward by a predetermined angle about the horizontal axis to incline the core downward, and the core is rotated by the rotation driving device via a plurality of clamp members. , Spray the coating agent from the coating agent injection nozzle, and apply the coating agent to the outer peripheral surface of the core,
After the application, lower the rotation of the core to drop excess coating agent adhering to the core, and then rotate the rotating body upward by a predetermined angle around the horizontal axis to carry out the core. It is designed to be handed over to the device.

In this case, the work of applying the coating agent can be automatically performed. In particular, a plurality of driving devices are attached to the rotating body, and the cores are attached to the driving shafts of the plurality of driving devices via the clamp members. By mounting it, it is possible to apply the mold-releasing agent to a plurality of cores at the same time, so that the mold-releasing agent can be quickly applied to the plurality of cores even when the core-making machine simultaneously manufactures a plurality of cores. Therefore, the time required for one cycle for coating can be significantly shortened as compared with the conventional case.

Further, a liquid type coating agent is sprayed from the coating agent injection nozzle onto the outer peripheral surface of the rotating core.
Unlike the conventional case, the coating agent is not atomized and does not scatter around, and the surrounding environment can be favorably maintained. Further, there is no fear that the mold coating agent will adhere even to the inner peripheral surface of the core which does not require coating. Furthermore, since the core is inclined downwards, simply by lowering the rotation of the core, excess coating agent is dropped and removed, and the coating agent is evenly distributed on the outer peripheral surface of the core in a short time. It can be applied.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a coating device for a core 2 for a centrifugal casting machine, which is an embodiment of the present invention.
Coating equipment 9 for coating the coating agent 4 on the outer peripheral surface of the core 2.
A core loading device 10 for loading the core 2 to the coating facility 9, a core unloading device 11 for transporting the core 2 from the coating facility 9 to the unloading conveyor 12, and a core-making machine (Fig. It is provided with a separate core unloading device 11 for delivering the core 2 from a core loading device 10 (not shown).

As shown in FIGS. 2 to 4, the coating equipment 9 has a rotary plate (rotating body) 13 having rotatably supported horizontal shafts 13a on both ends of a base frame 14 and the rotary plate. A plurality of (three in this configuration) handling devices 1 arranged on the surface 13 along the axial direction of the horizontal shaft 13a at predetermined intervals.
5 and by driving the drive device 16 composed of a servo motor connected to one horizontal shaft 13a,
The rotary plate 13 can be rotated by a predetermined angle.

Each of the handling devices 15 includes a rotary plate 1
A drive device 19 composed of a servo motor arranged on 3;
It is composed of a core clamp device 20 connected to a drive shaft 19a penetrating the rotary plate 13 and hanging from the drive device 19.

As shown in FIGS. 2 and 3, among the handling devices 15, the driving device 19 of the central handling device 15 is fixed to the rotary plate 13 via the substrate 21, and the handling devices 15 on both sides are fixed. The drive device 19 is disposed on the guide rail 23 on the rotary plate 13 via the base plate 22 so as to be movable in the directions of the arrows a and b along the axial direction of the horizontal shaft 13a, and the nuts 24 are fixed to the base plates 22. Is
Male screw portions 25a and 25b whose screw forming directions of the screw shaft 25 are opposite to each other are screwed into the nuts 24, respectively.
5 is rotated in the forward / reverse direction by the drive device 26 to move the handling devices 15 on both sides in the directions of the arrows a and b, and the spacing α between the handling devices 15 is set to the inside of the plurality of core loading devices 10. The distance between the children 2 can be adjusted. In addition, 27 is a space | interval detector which consists of an encoder connected to the screw shaft 25.

The core clamping device 20 is shown in FIGS.
Explaining with reference to FIG. 7, the central portion of the disc-shaped substrate 31 is fixed to the support shaft 30 concentrically connected to the lower end portion of the drive shaft 19a of the drive device 19 through the joint member 29, and the substrate 31 A plurality of guide members 32 extending radially outward from the center of the substrate 31 are arranged on the lower surface of the substrate 31 at predetermined circumferential angles (90 ° in this configuration) via brackets 33. , A plurality of clamp members 34 that are inserted into the core 2 and clamp the core 2 from the inner peripheral surface are movably engaged, and the plurality of clamp members 34 reciprocate via a link mechanism 35. A pair of air cylinders 36 are provided on the substrate 31.

The clamp member 34 is a guide member 32.
A slider 34a movably fitted to the slider 34a, a substantially L-shaped vertically extending rod 34b vertically provided on the slider 34a, and a rubber pad 34c secured to the vertically extending rod 34b. The upper end portion of the slider 34a extends upward through a through hole 37 penetrating the substrate 31. Further, the link mechanism 35 includes a disc 35 rotatably fitted on the support shaft 30.
a and a plurality of links 35b, one end of which is pin-connected to the outer peripheral portion of the disk 35a and the other end of which is pin-connected to a connecting plate 38 fixed to the upper end of each slider 34a. Further, the pair of air cylinders 36
The cylinder body is connected to the substrate 31 via the connecting rod 39.
Is pivotally attached to the outer peripheral portion of the disc, and the tip end portion of the piston rod is pivotally attached to the disc 35a via the connecting rod 40.

In the above structure, the pair of air cylinders 36 are driven to expand / contract the piston rod, whereby the disk 35a is rotated forward / backward by a predetermined angle (see phantom lines in FIG. 6), and the clamp members are connected via the respective links 35b. 34 is moved in the radial direction along each guide member 32, and the outer diameter R between the clamp members 34 can be adjusted according to the inner diameter r of the core 2.

Further, the outer diameter R between the clamp members 34 is small,
A plurality of core clamping devices 20 different from medium and large are prepared in advance, and an appropriate core clamping device 20 suitable for the inner diameter r of the core 2 is attached to the drive shaft 19a of the drive device 19 via the joint member 29. It is designed to connect.

Further, in the case of so-called three-piece picking in which three cores 2 are clamped at the same time, as shown in the drawing, the core clamp device 20 is connected to the drive shafts 19a of the three drive devices 19,
In the case of so-called two-piece picking in which two cores 2 are clamped at the same time, a so-called single piece in which one core 2 is clamped by connecting the core clamping device 20 to the drive shafts 19a of the two drive devices 19 on both sides. In the case of taking out, the core clamping device 20 may be connected to the drive shaft 19a of the drive device 19 at the center.

As shown in FIG. 4, each handling device 1
5, a plurality of movable bases 42 can move horizontally (see FIG. 3).
(In the directions of arrows a and b) of the movable table 4 and
The coating agent injection nozzle 43 is attached to the nozzle 2 in a state of being inclined at 45 °, for example. Although not shown, the moving table 42 includes an elevating part, a front-rear moving part arranged on the elevating part, and a left-right moving part arranged on the front-rear moving part. 43 is provided. FIG.
Inside, 44 is a saucer for collecting the coating agent.

In the above structure, the driving device 16 is driven from the state shown by the solid line in FIG. 4 to rotate the rotary plate 13 upward by a predetermined angle β, and the core 2 clamped by the core clamping device 20 is coated. The agent injection nozzle 43 is opposed (see the phantom line in the figure). Next, the driving device 19 rotates the core 2 via the core clamping device 20, and at the same time, the coating agent 4 is sprayed from the coating agent spray nozzle 43, so that the coating agent 4 is applied to the entire outer peripheral surface of the core 2. Apply. After that, the injection of the mold coating agent 4 is stopped, and the rotation of the core 2 is lowered by the drive device 19 to drop the excess mold coating agent 4 attached to the outer peripheral surface of the core 2. Then, by rotating the rotary plate 13 upward by a predetermined angle θ by the drive device 16 (see the phantom line in FIG. 4), the core 2 coated with the mold coating agent 4 is turned upside down to the core carrying-out device 11. It can be handed over.

The core carrying-in device 10 is, as shown in FIGS. 8 to 10, a carriage 47 movably mounted on a guide rail 46 on a foundation girder 45 via wheels 47a, and the carriage 47. It has an elevating table 50 that can be moved up and down along a guide rail 49 provided on the upper support frame 48.

A pinion 52 fixed to the drive shaft of a drive device 51 provided on the carriage 47 is meshed with a rack 53 parallel to the guide rail 46, and drives the drive device 51 to rotate the pinion 52 forward and backward. By doing so, the carriage 47 can be reciprocated along the guide rails 46 in the directions of arrows a and b. Reference numeral 54 is a floating prevention roller that contacts the lower surface of the base girder 45.

The elevating table 50 is mounted on the upright plates 50a that engage with the guide rails 49 so as to move up and down, a pair of horizontal girders 50b extending horizontally from the upright plates 50a, and the pair of horizontal girders 50b. A horizontal plate 50c, and the core 2 is placed on the horizontal plate 50c. Further, a screw shaft 55 extending in the vertical direction is rotatably disposed on the support frame 48 via a bearing 56, and a nut 57 fixed to the upright plate 50a is screwed onto the screw shaft 55, so that the support frame 48 is supported. The drive shaft of the drive device 58 provided at the one end and one end of the screw shaft 55 are interlockingly connected via pulleys 59, 60 and a belt 61, and the other end of the screw shaft 55 has a pulley 62,
A height detector 65 composed of an encoder that is interlocked and coupled via 63 and a belt 64 is attached to the support frame 48.

In the above structure, by driving the driving device 58, the screw shaft 55 can be rotated in the forward and reverse directions via the pulleys 59 and 60 and the belt 61, and the lifting table 50 can be raised and lowered via the nut 57.

The core carrying-out device 11 is shown in FIG. 11 and FIG.
As shown in FIG. 2, a horizontal girder 67 installed above the coating facility 9
The carriage 69 that is movably arranged on the guide rail 68 provided above via wheels 69a, the lift table 70 that is vertically mounted on the carriage 69, and the moving direction of the carriage 69 on the lift table 70 are It has a pair of core pinching members 71 suspended so as to be movable along orthogonal arrow e and f directions.

The carriage 69 is moved by a drive device 72 provided on the carriage 69 in the directions of arrows a and b through a chain mechanism 73. In addition, a plurality of the lifts 70 are movably inserted into a guide cylinder 74 fixed to the carriage 69 at a predetermined interval (in this configuration, 4).
Book) 75 is fixed to the lower end of the guide rod 75, and a rack jack 76 is provided between the center of the lifting platform 70 and the carriage 69.
Is provided.

The rack jack 76 is connected to the central portion of the lifting table 70 via a connecting frame 77, and is inserted into the jack case 76a on the carriage 69 so as to be lifted up and down, and the inside of the jack case 76a. And a drive device 76d including a pinion 76c that is rotatably provided on the side surface of the jack rod 76 and that meshes with a rack, and an inverter motor that rotates the pinion 76c forward and backward.
And a height detector 76e composed of an encoder connected to the pinion 76c. By driving the driving device 76d to rotate the pinion 76c forward and backward, the lifting platform 70 is moved up and down via the jack rod 76b. Can be made.

The core pinching member 71 is composed of a pair of upper and lower horizontal rails 71a, 71 arranged in parallel with each other at a predetermined interval.
b and a pair of left and right vertical bars 71c and 71d that connect the horizontal bars 71a and 71b to each other, and can be moved in the directions of arrows e and f along a guide rail 79 provided on the lower surface of the lift table 70. It is configured. In addition, the bearing 8 is provided on the lower surface of the lifting platform 70.
The pair of threaded rods 81, 81 extending in the directions of arrows e, f provided through 0 rotate in the opposite direction via the gears 81a, 81a provided at the other end, and are attached to the respective threaded rods 81, 81. A nut 82 fixed to each core pinching member 71 is screwed. Further, a drive device 83 provided on the lift table 70
Drive shaft is interlockingly connected to one end of one screw rod 81 via pulleys 84, 85 and a belt 86, and a gap detector 87 composed of an encoder is connected to one end of the other screw rod 81. Lower horizontal rail 71b of the core pinching member 71
A core holding plate 89 is fixed to the piston rod of the air cylinder 88 arranged above.

In the above structure, from the state shown by the solid line in FIG. 12, the drive motor 83 is driven to rotate the screw rod 81 via the pulleys 84, 85 and the belt 86, whereby the pair of core pinching members 71 are separated from each other. The lower surface of the core 2 can be supported by the lower horizontal rails 71b of the pair of core pinching members 71 that are moved toward each other, and then the air cylinder 88 is extended to drive the pair of cores. The core 2 on the lower horizontal rail 71b can be held by the child holding plate 89 (see the phantom line in FIG. 12). Further, when transferring the core 2 from the core unloading device 11 to the unloading conveyor 12, by moving the pair of core pinching members 71 in a direction in which they are separated from each other, and at the same time, by extending and driving the air cylinder 88, The core 2 on the lower horizontal rail 71b can be reliably transferred onto the carry-out conveyor 12 by the pair of core pinching plates 89.

A description will be given of the coating operation when so-called three cores 2 are taken. First, the core clamping device 20 that is suitable for the inner diameters r of the three cores 2 simultaneously manufactured by the core making machine is joined to the joint member 29. Is connected to the drive shaft 19a of the drive device 19 via the, and the spacing α between the handling devices 15 is adjusted according to the spacing α between the cores 2.

Next, one of the core unloading devices 11 is moved to the core making machine, the elevating table 70 of the core unloading device 11 is lowered, and the pair of core pinching members 71 are brought close to each other to move down. The three lateral cores 71b sandwich the three cores 2 in the standing state, which are simultaneously manufactured by the core making machine, and raise the elevating table 70 to lift the three cores 2 (see FIG. 12). Of the three cores 2 that have been lifted up by moving the upper part of the core loading device 10 and lowering the elevating table 70.
Is placed on the ascending / descending base 50 of the core loading device 10 (see the phantom line in FIG. 1). As a result, the three cores 2 are manufactured from the core-making machine in the state in which they are manufactured.
0 can be passed.

Subsequently, after the core 2 is released from the core carrying-out device 11, the elevating table 50 of the core carrying-in device 10 is lowered, and the carriage 47 is moved in the direction of the arrow a to make the elevating table 5
3 cores 2 above 0 are carried into the coating equipment 9, and the lifting table 5
By raising 0, the three cores 2 are respectively fitted to the plurality of clamp members 34 of each core clamp device 20 standing by in a vertical state. Here, each clamp member 34 is When facing the two ribs 2c, the driving device 19 including a servomotor is driven to rotate each clamp member 34 by a predetermined angle, thereby stopping each clamp member 34 at a position not facing the rib 2c. Let As a result, the three cores 2 supported by the core carry-in device 10 can be securely fitted to the clamp members 34 of each core clamp device 20.

After that, the clamp members 34 are moved radially outward, and the cores 2 are clamped by the clamp members 34 from the inner peripheral surface while avoiding the ribs 2c.
The three cores 2 can be transferred to each handling device 15 by lowering the elevating table 50 (see FIG. 4).
Solid line).

Next, the rotary plate 13 is rotated upward by a predetermined angle β so that the three cores 2 face the respective coating agent injection nozzles 43 (see phantom lines in FIG. 4). While rotating, spraying the coating agent 4 from each coating agent injection nozzle 43,
The coating agent 4 is applied to the entire outer peripheral surface of the three cores 2, and then the injection of the coating agent 4 is stopped and the rotation of the three cores 2 is lowered, whereby the outer peripheral surface of each core 2 is reduced. Excess coating agent 4 adhering to is dropped. Then, by rotating the rotary plate 13 upward by a predetermined angle θ (see the phantom line in FIG. 4),
The core 2 coated with the mold wash 4 is inverted.

Subsequently, the elevating table 70 of the core unloading device 11 standing by above the coating facility 9 is lowered, and the pair of core pinching members 71 are moved closer to each other, so that the lower horizontal rung 71b.
The three cores 2 in the inverted state are sandwiched by the two, and each clamp member 34 is moved in the radial direction to release the clamp of the three cores 2, and then the lifting platform 70 is raised to raise the three cores 2.
Is lifted (see the phantom line in FIG. 12), the core unloading device 11 is moved to a position above the unloading conveyor 12, and the lifting platform 70 is lowered, so that the three hung cores 2 can be transferred to the transport conveyor 12. it can.

[0037]

According to the present invention, it is possible to automatically perform a coating operation of a mold coating agent. In particular, a plurality of drive devices are attached to a rotating body, and clamp members are provided on the drive shafts of the plurality of drive devices. By mounting the cores through the cores, it is possible to simultaneously apply the coating agent to a plurality of cores. Can be applied quickly, and the time per cycle required for application can be significantly shortened compared to the conventional case.

Further, a liquid type coating agent is sprayed from the coating agent spray nozzle onto the outer peripheral surface of the rotating core.
Unlike the conventional case, the coating agent does not form a mist around and scatters, and the surrounding environment can be favorably maintained.

Further, after applying the mold-releasing agent to the outer peripheral surface of the core, by simply lowering the rotation of the core by the driving device, the excess mold-releasing agent is dripped from the core and applied onto the outer peripheral surface of the core. The mold can be evenly applied.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an entire coating apparatus according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of a main part of the coating facility.

FIG. 3 is a plan view of a main part of the coating facility.

FIG. 4 is a vertical cross-sectional view of a main part of the coating facility.

FIG. 5 is a vertical sectional view of the core clamping device.

FIG. 6 is a plan view of the core clamping device.

FIG. 7 is a horizontal sectional view of the core clamping device.

FIG. 8 is a partially cutaway front view of the core loading device.

FIG. 9 is a plan view of the core loading device.

FIG. 10 is a side view of the core loading device.

FIG. 11 is a partially cutaway front view of the core unloading device.

FIG. 12 is a side view of the core unloading device.

FIG. 13 is a vertical sectional view showing a state in which a core is fitted in the mold.

FIG. 14 is a perspective view of a core.

FIG. 15 is an explanatory diagram showing an example of a conventional coating method.

FIG. 16 is an explanatory diagram showing another example of a conventional coating method.

[Explanation of symbols]

 2 Core for centrifugal casting machine 4 Coating agent 9 Coating equipment 10 Core loading device 11 Core loading device 13 Rotating plate (rotating body) 13a Horizontal shaft 19 Drive device 19a Drive device drive shaft 34 Clamping member 43 Coating liquid Injection nozzle

Claims (1)

[Claims] 1. A coating facility for applying a coating agent onto the outer peripheral surface of a core for a centrifugal casting machine, a core loading device for loading the core to the coating facility, and a core from the coating facility. A core unloading device for unloading the core, and the coating facility includes a rotating body that can be driven to rotate about a horizontal axis, a driving device disposed on the rotating body, and a driving shaft of the driving device. A plurality of clamp members attached and movable along the radial direction of the drive shaft, and a coating agent injection nozzle, and the core carried in by the core carrying-in device to the plurality of clamp members. The plurality of clamp members are fitted to each other, and the plurality of clamp members are moved radially outward to clamp the core from the inner peripheral surface thereof, and the rotating body is rotated upward by a predetermined angle to incline the core downward, and the drive unit By rotating the core through a plurality of clamp members by The core ejection device ejects a mold coating agent from the agent spray nozzle to apply the mold coating agent to the outer peripheral surface of the core, and rotates the rotating body upward by a predetermined angle to apply the mold coating agent to the core delivery device. A coating agent coating device for a core for a centrifugal casting machine, which is configured to be delivered to a core.