JP2602870B2 - Ceramic plate grinding machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a grinding device for grinding front and back surfaces of a ceramic plate such as an alumina substrate.

(Prior Art) As a conventional technique, for example, JP-A-61-178170,
There are JP-A-58-192745 and JP-B-61-13947.

In each of the above publications, the object to be ground is charged together with the abrasive grains into a tank or a container, and the tank or container is rotated and vibrated by a rotating means or the like, and the object to be ground is subjected to frictional contact between the object to be ground and the abrasive grains. A barrel-type grinding method for grinding an object is disclosed.

(Problems to be Solved by the Invention) In the case of the above barrel type grinding method, the number of objects to be ground in one grinding step is limited, and the objects to be ground are mounted in a tank or a container. There is a problem in that complicated work and time are required for the work of inserting and removing, and the grinding efficiency is extremely deteriorated.

An object of the present invention is to improve the grinding efficiency by solving the above problems.

(Means for Solving the Problems) In order to solve the above problems, the invention according to claim 1 is a ceramic plate grinding apparatus for grinding both surfaces of a ceramic plate while transferring the ceramic plate. A first transfer conveyer having a vent hole on the first surface side of the ceramic plate, a first suction device for adsorbing the ceramic plate on the first transfer conveyer through the vent hole, and the first transfer A first grinding wheel for grinding the second surface of the ceramic plate adsorbed on the conveyor, and a plurality of air holes having a downstream side of the first transfer conveyor on a side of the second surface of the ceramic plate; A second transfer conveyor located, a second suction device for adsorbing the ceramics plate to the second transfer conveyor through the ventilation hole,
A second grinding wheel that grinds the first surface of the ceramic plate adsorbed to the second transfer conveyor, and near each upstream side of the first and second grinding wheels, First and second grinding fluid discharge nozzles for supplying a grinding fluid to a grinding portion are provided, and the first and second suction devices suction by a suction force of a blower connected via a duct. In the middle of the duct,
-A tank for separating the grinding fluid sucked by the second suction device from the air is provided.

The invention according to claim 2 is a ceramic plate grinding apparatus for grinding both surfaces of a ceramic plate while transferring the ceramic plate, the device having a large number of ventilation holes and being positioned on the first surface side of the ceramic plate. A first transfer conveyor,
A first suction device for adsorbing the ceramic plate to the first transfer conveyor through the ventilation hole, a first grinding wheel for grinding a second surface of the ceramic plate adsorbed on the first transfer conveyor, The first
A second transfer conveyor located on the side of the second surface of the ceramic plate downstream of the transfer conveyor, a second suction device for adsorbing the ceramic plate to the second transfer conveyor through the vent hole, A second grinding wheel for grinding the first surface of the ceramic plate adsorbed on the transfer conveyor, wherein the first and second suction devices are suctioned by a suction force of a blower connected via a duct. The first and second suction devices have a plate that comes into contact with the first and second transfer conveyors, and a surface of each of the plates that comes into contact with each of the transfer conveyors includes: A large number of grooves extending in a direction oblique to the moving direction of each transfer conveyor are formed, and a large number of intake holes communicating with the duct are formed in these grooves.

(Operation / Effect) In the invention according to claim 1 and claim 2, in a state in which the ceramic plate is suctioned to the first transfer conveyor by the first suction device through the ventilation hole of the first transfer conveyor,
While the ceramic plate is transferred by the first transfer conveyor, the second surface of the ceramic plate is ground by the first grinding wheel. Then, after that, in a state where the ceramic plate is adsorbed to the second transfer conveyor by the second suction device through the ventilation hole of the second transfer conveyor,
While transferring the ceramics plate by the transfer conveyor, the first surface of the ceramics plate is ground by the second grinding wheel. Thus, both sides of the ceramic plate can be easily ground.

Also, when grinding each surface of the ceramic plate, the grinding liquid is supplied to the grinding portion of the ceramic plate from first and second grinding liquid discharge nozzles provided near the upstream side of each grinding wheel. Is done. For this reason, the ceramic plate can be smoothly ground.

Further, in the invention according to claim 1, the following specific operation and effect can be obtained. That is, each suction device suctions by the suction force of the blower.
In many cases, not only air but also grinding fluid is sucked at the same time. When the grinding fluid reaches the blower, the performance of the blower is reduced. However, a tank is provided on the way to the blower, and the grinding fluid is separated in the tank. Therefore, the grinding fluid is prevented from reaching the blower, the suction force of the blower is secured, and reliable grinding is ensured.

Further, in the invention according to claim 2, the following specific operation and effect can be obtained. That is, based on the suction force of the blower, the ceramic plate is suctioned to each transfer conveyor through each suction hole of the plate of each suction device and the ventilation hole of each transfer conveyor. At this time, in each plate of each suction device, a large number of intake holes are provided for each of the plurality of grooves, so that the plurality of intake holes communicate with each other through the grooves. Become. Each groove extends in each plate in a direction oblique to the moving direction of each transfer conveyor.

For this reason, even when the transfer conveyor does meandering or the like and does not perform a predetermined traveling, the communication state between the suction hole of the suction device and the ventilation hole of the transfer conveyor is more reliably ensured through each groove. This means that the ceramic plate can be reliably attracted to each transfer conveyor,
Reliable grinding can be performed.

(Embodiment) Next, an embodiment of an apparatus used for carrying out the present invention will be described with reference to the drawings.

It is applied when smoothing the front and back surfaces of the ceramic plate by removing the sand that adheres to the front and back surfaces of the ceramic plate that has been stacked and fired in multiple layers.
In a grinding machine K applied to a 1.6 mm thin and small ceramic plate, this grinding machine K automatically puts one or more unprocessed ceramic plates with grain sand into the grinding line. Loading station S1 for loading
A grinding station S2 for continuously grinding the upper and lower surfaces of the untreated ceramic plate, a cleaning station S3 for cleaning the ground ceramic plate, and a drying station for drying the washed ceramic plate. S4
And an unloading station S5 for unloading the dried ceramic plate out of the transfer line are arranged from the front.

In the transfer station S1, an endless belt 3 is circulated around a support member 2 attached to a base 1 and connected to a linear motor 4 attached to a lower end of the support member 2. On the receiving plate 5 fixed to the belt 3, an appropriate number of ceramic plate rows each of which a plurality of ceramic plates C are superimposed are placed (in this example, one to three ceramic plate rows are placed. The operation in which the uppermost ceramic plate C is sucked and transferred one by one is repeated, and when the uppermost ceramic plate descends to a predetermined position, a sensor (not shown) detects this and the receiving plate 5 moves for a predetermined time. To rise. On the other hand, a four-bar linkage 7 having a hand 6 attached to the upper end thereof is mounted on the base 1 so as to be tiltable in the front-rear direction. An appropriate number (three in this example) of suction cups 9 respectively connected to each other are attached via arms 10 respectively. The hand 6 is connected to a piston shaft of an upper air cylinder 11 pivotally supported by an upright portion 6a of the hand 6, and a rear link 7a of the four-bar linkage 7 is connected to a piston shaft of a lower air cylinder 12. The hand 6 reciprocates in the forward and backward and downward directions by the reciprocating movement of the piston shafts of the air cylinders 11 and 12, and the uppermost ceramic in the ceramic plate row on the receiving plate 5 every time the hand 6 reciprocates The plate C is picked up by the suction cup 9 and transferred to the starting end at the grinding station S2.

A box-shaped machine base 14 is installed in the grinding station S2, and a box-shaped cover 15 that covers the machine base 14 in a sealed manner is mounted on the machine base 14. At the upper end of the machine base 14, an endless first transfer conveyor 16 having a transfer surface 17 which is hung rotatably on the conveyor rollers 16a to 16a so as to be rotatable and travels straight in the horizontal direction, is formed on the upper side; The first transfer conveyor 16 is installed so as to be rotatably circulated around 18a to 18a and installed upside down with respect to the first transfer conveyor 16, and
An endless second transfer conveyor 18 formed on the lower side with a transfer surface 19 that travels straight at substantially the same horizontal level as the transfer surface 17 of the front and back 16 with both transfer surfaces 17, 19 partially overlapped. Are arranged. Each of the transfer conveyors 16 and 18 is provided with a plurality of ventilation holes 20 to 20 arranged at equal intervals in the vertical and horizontal directions and in a direction inclined at 45 ° to the transfer direction.

Below the transfer surface 17 of the first transfer conveyor 16, a hollow first suction box 21 fixed to the machine base 14 is attached along the transfer surface 17 so that the ceramics plate C is vacuum-sucked to the transfer surface 17. On the other hand, above the transfer surface 19 of the second transfer conveyor 18, a hollow second suction box 22 fixed to the machine base 14 for vacuum adsorbing the ceramics plate C to the transfer surface 19 is provided. It is attached along. Both suction boxes 21, 22
Is a duct in which a tank 33 for separating moisture sucked together with air is provided on the way to a blower 32 installed on one side of the transfer line for sucking air in both suction boxes 21 and 22. They are connected via 34,34. A plurality of communication grooves 23 to 23 recessed along the oblique direction are respectively formed at equal intervals in the porous plates 21a and 22a formed at the upper end of the first suction box 21 and the lower end of the second suction box 22, respectively. While being arranged in parallel, a large number of intake holes are arranged in the two perforated plates 21a and 22a at positions respectively penetrating the communication grooves 23 and arranged at equal intervals.
24 to 24 are penetrated, and the respective intake holes 24 in the intake hole array obliquely arranged along the center line of each communication groove 23 are connected to each other by the communication groove 23. Ventilation holes 2 on both conveyors 16, 18
0 is an area of both transfer surfaces 17, 19 corresponding to the area of the ceramic plate, that is, each ventilation hole closed by the ceramic plate C within the area of both transfer surfaces 17, 19 surrounded by the outline of the ceramic plate C. Part of 20 is perforated plate 21a, 22a
And always communicate with each other by overlapping part of the communication groove 23,
The total area of the air holes 20 overlapping the communication groove 23 is always at least N (N = 4 in this example) N × π (D /
2) It is set so as to be ² or more (D is the hole diameter of the ventilation hole 20), and the ceramic plate C has the intake hole 24, the communication groove 23, the ventilation hole
The transfer surface 1 is sucked to both suction boxes 21 and 22 through
It is transferred horizontally while being adsorbed on 7,19. In this example, the hole diameter D of each ventilation hole 20 and each intake hole 24 is 4 m.
m, the groove width H of the communication hole 23 is 4 mm, and the inclination angle A of the communication groove 23 is 2
2.5 ゜, 45 ° diagonal array of vent holes
゜, the vertical arrangement interval K1 and the horizontal arrangement interval K2 of the ventilation holes 20 are each 17 mm, and the vertical arrangement interval K3 of the intake holes 24.
8.5 mm each, 17 m of the horizontal arrangement interval K4 of the intake holes 24
m, and the position of each air hole array arranged in the transfer direction is the same as the position of each vertical air hole array arranged in the transfer direction, or it is arranged in the middle part of the adjacent vertical air hole array. (See FIG. 5).

In order to grind the upper surface of the ceramic plate C which is adsorbed and transferred to the transfer surface 17 of the first transfer conveyor 16, the second transfer conveyor 16 is formed to have a radially elastic soft disk-like shape opposed to the first transfer conveyor 16 for grinding. The first grinding wheel 26 is provided above the transfer surface 17 and is used to continuously grind the lower surface of the ceramic plate C which is sucked and transferred to the transfer surface 19 of the second transfer conveyor 18 immediately after grinding the upper surface. A second grinding wheel 27 formed in the shape of a soft disk having elasticity in the radial direction is provided below the transfer surface 19. The grinding wheels 26 and 27 are formed by cutting a roll body in which a nonwoven fabric impregnated with grinding abrasive grains is wound in multiple layers, for example. The first grinding wheel 26 is connected to an oscillation mechanism 28 driven by a motor 29 and is rotationally driven via a belt by a motor 30 while reciprocating in the axial direction. Is driven to rotate.

Discharge nozzles 36 and 37 arranged close to the rear side of both grinding wheels 26 and 27 respectively discharge grinding fluid toward the grinding part during grinding of the ceramic plate to grind the workpiece in a wet state. The discharge nozzles 38 and 39 are provided to discharge the grinding fluid to remove grinding chips from the ceramic plate. The upper and lower surfaces of the ceramic plate C carried into the grinding station S2 are continuously ground in a wet state by the first and second grinding wheels 26 and 27, and are carried into the cleaning station S3.

The cleaning station S3 is rotatably circulated from the vicinity of the end of the grinding station S2 to the vicinity of the starting end of the lower net conveyor 40, which is rotatively wrapped around the unloading station S5, and from the rinsing station S3 to the unloading station S5. The vicinity of the starting end of the bridged upper net conveyor 41 is set in a superposed state in order to sandwich and transfer the ceramic plate. An upper circulating portion of the lower net conveyor 40,
The lower circulating portion of the upper net conveyor 41 circulates while being sandwiched between a number of pairs of pinch rollers, and both net conveyors 40, 41
An appropriate number of upper and lower pairs of cleaning nozzles 42 to 42 are arranged above and below the transfer path of the ceramic plate that is sandwiched and transferred between them so as to spray a cleaning liquid toward the upper and lower surfaces of the ceramic plate, respectively. At the end of the cleaning station S3, a pair of upper and lower dehydrating rollers 43 for squeezing the cleaning liquid adhered to the ceramics plate is provided.

A drying station S4 subsequent to the washing station S3 is disposed opposite to the upper and lower sides of the transfer path to blow room temperature air onto the upper and lower surfaces of the ceramic plate carried out and transferred from the washing station S3. A pair of upper and lower primary dewatering ducts 44, 44 each having an appropriate number of blowing nozzles 44a to 44a inclined with respect to the transfer path, and the front of both primary dehydrating ducts 44 for blowing hot air onto the upper and lower surfaces of the ceramic plate. Hot air ducts 45, 4 which are installed opposite to each other at the top and bottom of the work passage and have an appropriate number of blowing nozzles 45a to 45a
5 are connected in series, both primary dewatering ducts 44 are connected to blowers 46 installed below them, and both hot air ducts 45 are connected to blowers 47, 47 installed below them via heaters 48, 48. Have been.

In the unloading station S5, the end of the lower net conveyor 40 and the end of the upper net conveyor 41 are arranged in a staggered manner, and the discharge chute 49 is ground on the receiving box 50 for receiving the ceramic plate. The ceramics plate is discharged from the terminal end onto the lower net conveyor 40 and is fed into the receiving box 50 through the discharge chute 49.

When the ceramic plate C is ground using the apparatus having the above configuration, the ceramic plate C is adsorbed on the transfer surface 17 of the first transfer conveyor 16 for transferring the ceramic plate C carried into the grinding station S2. After the upper surface of the ceramics plate C is ground by the first grinding wheel 26 opposed to the first transfer conveyor 16 while transferring the ceramics plate C, the ceramics plate C is set upside down with respect to the first transfer conveyor 16. The lower surface of the ceramics plate C is ground by the second grinding wheel 27 provided on the second transfer conveyor 18 while being suctioned and transferred to the transfer surface 19 of the second transfer conveyor 18, and further,
The ceramic plate C is washed, dried and carried out of the line.

For this reason, in the grinding process of the ceramic plates, the ceramic plates C are fixed to the transfer surfaces 17 and 19 of the two transfer conveyors 16 and 18, respectively, and each ceramic plate C Can be accurately and stably transferred so that the upper and lower surfaces of the ceramic plate C can be accurately ground, respectively.
The steps of washing, drying, and carrying out are made continuous and fully automated, so that the grinding process of the ceramic plate C can be efficiently performed.

Further, after the upper surface of the ceramic plate C is ground while the ceramic plate C is attracted to the transfer surface 17, the lower surface of the ceramic plate is continuously ground while the ceramic plate C is attracted to the transfer surface 19. Therefore, an inversion mechanism for inverting the ceramic plate upside down in order to continuously grind the upper and lower surfaces becomes unnecessary, and the space required for the continuous grinding of the upper and lower surfaces of the ceramic plate C can be reduced.

In particular, in this example, a part of each of the ventilation holes 20 of the first and second transfer conveyors 16 and 18 closed by the ceramic plate C is formed by the intake holes of the perforated plates 21a and 21a of the first and second suction boxes 21 and 22. Since it is set so as to always communicate with a part of the 24 group via the communication groove 23, the ceramic plate C is stably and accurately adsorbed and transferred to both transfer surfaces 17, 19, respectively. Has the effect of increasing the grinding accuracy of both the upper and lower surfaces of the ceramic plate.

Also, even if the transfer surfaces 17, 19 of the transfer conveyors 16, 18 meander, or run incorrectly, and the traveling position of each of the ventilation holes 20 changes, each of the intake holes in the intake hole array arranged diagonally. Since the channels 24 are communicated with each other by the communication groove, the positional deviation of the ventilation holes 20 can be absorbed and a predetermined suction force can be always secured.

[Brief description of the drawings]

The drawing shows an embodiment of the grinding device of the present invention,
FIG. 3 is an enlarged sectional view taken along line X1-X1 of FIG. 3, FIG. 2 is a side view of the grinding machine, FIG. 3 is a plan view of the same, FIG. 4 is a side view of the loading station, and FIG. FIG. 6 is an enlarged plan view of the box, and FIG. 6 is a sectional view taken along line X2-X2 in FIG. 16 First transfer conveyor, 17 Transfer surface 18 Second transfer conveyor, 19 Transfer surface 26 First grinding wheel, 27 Second grinding wheel C Ceramic plate

Claims (2)

(57) [Claims] 1. A ceramic plate grinding apparatus for grinding both surfaces of a ceramic plate while transferring the ceramic plate, the first transfer conveyor having a number of air holes and being located on a first surface side of the ceramic plate. A first suction device for adsorbing the ceramic plate to the first transfer conveyor through the ventilation hole, and a first grinding wheel for grinding a second surface of the ceramic plate adsorbed to the first transfer conveyor. A second air passage having a plurality of air holes and located on the side of the second surface of the ceramic plate downstream of the first transfer conveyor;
A transfer conveyor, a second suction device that sucks the ceramic plate to the second transfer conveyor through the ventilation hole, and a second grinding that grinds a first surface of the ceramic plate sucked to the second transfer conveyor. A first and second grinding wheel, in the vicinity of each upstream side of the first and second grinding wheels, for supplying a grinding fluid to a grinding portion of the ceramic plate;
A second grinding fluid discharge nozzle is provided, and the first and second suction devices suction by a suction force of a blower connected via a duct, and the first and second suction devices are provided in the middle of the duct. (2) A ceramic plate grinding apparatus comprising a tank for separating a grinding fluid sucked by a suction device from air. 2. A ceramic plate grinding apparatus for grinding both surfaces of a ceramic plate while transferring the ceramic plate, comprising: a first transfer conveyor having a number of air holes and located on a first surface side of the ceramic plate. A first suction device for adsorbing the ceramic plate to the first transfer conveyor through the vent hole, and a first grinding wheel for grinding a second surface of the ceramic plate adsorbed to the first transfer conveyor. A second air passage having a plurality of air holes and located on the side of the second surface of the ceramic plate downstream of the first transfer conveyor;
A transfer conveyor, a second suction device that sucks the ceramic plate to the second transfer conveyor through the ventilation hole, and a second grinding that grinds a first surface of the ceramic plate sucked to the second transfer conveyor. A whetstone, wherein the first and second suction devices suction by a suction force of a blower connected through a duct, and the first and second suction devices are the first and second suction devices. It has a plate that comes into contact with the transfer conveyor, and on a surface of the plate that contacts the transfer conveyor, a number of grooves that extend in a direction oblique to the direction of movement of the transfer conveyor are formed, A ceramic plate grinding apparatus, wherein a number of intake holes communicating with the duct are formed in those grooves.