JPH0392309A - Knife-cutting device for green sheet - Google Patents

Abstract

PURPOSE:To cut with high accuracy even if the unevenness of dimensions exists in a lot by moving in parallel corresponding to the dimension in the read marks a cutter consisting of a camera reading marks on a green sheet and a knife integrated through a heat insulating plate. CONSTITUTION:A pallet on which a green sheet is placed is lifted up by a mark sensing ejection mechanism 11 and sucked by a pallet suction mechanism 14B and fixed on a table 24. A camera 27 of a cutter 4 reads marks M, M of the green sheet G, and deviation of position and distortion to a knife 26 are micro-adjusted by adjusting mechanisms 13 and 12. A knife cutting ejection mechanism 10 lifts up said pallet and carries out the first knife cutting to the green sheet G. As the knife 26 is heated up by a heater 28, cutting is carried out smoothly. Then, the pallet is lowered and the knife 26 is moved by the cutting width of divided (n) pieces of the distance between the marks M, M measured by the camera 27 by a cutter transfer mechanism 5 to carry out cutting similarly.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a green sheet knife cutting device capable of cutting a ceramic green sheet into a precise size and width.

(Prior Art) A conventional knife cutting device for cutting a ceramic green sheet into a certain size width optically reads marks attached to both ends of the green sheet using a television camera, etc., and calculates the distance between the marks. In this method, the position of the knife of the cutter mechanism is corrected by calculating the angle and the inclination, and then the knife is moved horizontally by a predetermined amount and then lowered to cut. However, in such conventional devices, the television camera and cutter mechanism are independent, so fine adjustment is required between the reading position by the television camera and the cutting start position by the cutter mechanism, and the Although this fine adjustment was performed, it was not possible to deal with variations in dimensions within the loft, and there was a drawback that accurate cutting could not be performed. In addition, the green sheet and the knife of the cutter mechanism are heated for cutting, and the resulting thermal expansion further increases dimensional errors.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and makes it possible to cut a green sheet into a constant width with high precision even when there is variation in dimensions within the loft. It has been perfected to provide a green sheet knife cutting device that can be used.

(Means for Solving the Problem) The above problem is such that the above-mentioned problem is such that the above-mentioned problem is as follows:
A cutter is provided in which a camera and a knife for reading marks attached to a green sheet are integrated through a heat insulating plate, and a cutter feeding mechanism that moves the cutter in parallel according to the distance between the marks read by the camera. It is characterized by this.

(Example) Next, the present invention will be explained in more detail based on the illustrated example.

In the figure, (1) is a frame equipped with a conveyor (2), a push-up mechanism (3) is provided below the conveyor surface, and a cutter (4) and cutter feed mechanism (5) are provided above the conveyor surface. is provided. The structure of each part will be explained below.

(Conveyor) Conveyor (2) is splot (6) of frame (1)
, (6) A chain-type green sheet G stretched between green sheets G, driven intermittently by a motor (7), and placed on a plate-shaped pallet P as shown in FIG.
is placed on the conveyor (2) at the pallet loading position A, and taken out to the outside at the pallet unloading position B. At the pallet mounting position IA, there is a platform (
9) is provided, and the loading table (9) is connected to the conveyor (2).
If the green sheet G placed on the pallet P is set on the platform (9) when it is lifted upward, the pallet P will be correctly placed on the conveyor (2) when the platform (9) is lowered. It has become.

<<Push-up mechanism>> The push-up mechanism (3) is provided inside the frame (1), and the knife cutting push-up mechanism 00 is arranged in order from the bottom.
1, a mark detection push-up mechanism 00, a θ-axis adjustment mechanism 0'lJ, a l adjustment mechanism 03), and a pallet chuck mechanism 04).

The knife cutting push-up machine N400) uses a geared motor 09 to rotate an eccentric cam 06) to move the table 07) up and down during knife cutting. The mark detection push-up mechanism 00 is provided with a cam Q9) that can be slid by a cylinder 08) on a table 0'r), and the table 2G is moved up and down by this cam 09 during mark detection prior to knife cutting. Note that table a'7),
QΦ is moved up and down while being guided by two guides (21). The θ-axis adjustment mechanism θ is provided on the table I2l and rotates the table (22) by a small angle about the vertical axis to correct the twisting of the green sheet G with respect to the cutter (4). X-axis adjustment mechanism 0■ is the table (22
), and moves the table (24) in the X-axis direction, which is the left-right direction in FIGS. 1 and 3, by a feed screw equipped with a motor (23). This allows the cutter (4
) to correct the deviation of the green sheet G in the X-axis direction. Note that the method of correcting the θ-axis and the X-axis will be explained in detail later. The pallet chuck mechanism circle is mounted on a conveyor (24) on a table (24) as shown in FIGS.
2) A pair of chucks (25), (25) to sandwich the
These chucks (25), (25) sandwich and fix the pallet P carried by the conveyor (2) from both sides.

The lifting mechanism (3), which is composed of the above mechanisms, fixes the pallet P- on the conveyor (2) with a chuck, lifts it from the conveyor (2), and performs the necessary corrections in the θ-axis and X-axis directions. Then, it can be moved up and down toward the cutter (4).

<<Cutter>> The cutter (4) has a long and thin knife (26) hanging down in the center, and a pair of cameras (27), (27) on the sides thereof.
), and these knives (26) and cameras (27), (27) are integrated so that their relative positions do not change. As shown in FIG. 4, the cameras (27) and (27) are for detecting a pair of marks M2M that are pre-marked on the sides of the green sheet G during the manufacturing process, so the knives (26 ) is positioned at the center of green sheet G, cameras (27) and (2
7) is placed above these marks M, M. The knife (26) is heated by a heater (28) to facilitate cutting, but a ceramic heat insulating plate (29) is provided above the knife (26) so that the heat from the heater (28) is transferred to the camera (27). >, (27).The knife (26) is a single-blade knife with a blade length equal to the length of the cutting line S shown in FIG.

(Cutter feeding mechanism) The cutter (4) of the present invention is moved in the Y-axis direction (horizontal direction in Fig. 2, vertical direction in Fig. 3) by this cutter feeding mechanism (5).
It will be translated in parallel only. This feed in the Y-axis direction is also controlled by the motor (
30), the feed amount is determined by the mark M detected by the camera (27), (27).
, M is subjected to NC control so as to equally divide the distance between them. In addition(
31) is a handle for finely adjusting the height.

(effect) Next, the operation of the device of the present invention will be explained.

First, at pallet loading position A, the loading platform (9) is placed on the conveyor (2).
) is lifted above the pallet transport surface, and the green sheet G placed on the pallet P is placed on top of it.

Marks M, M as shown in FIG. 4 are previously attached to the edges of the green sheet G during the manufacturing process. When the platform (9) descends, the pallet P is placed on the conveyor (2) and transported to a position directly below the canter (4),
It hits the pallet stop collar (14M) protruding above the l-passing surface and stops.

Next, the mark detection push-up mechanism (11) of the push-up mechanism (3) raises the part above it, and
Pallet chuck mechanism (14B). (14B) Chuck the pallet P and place the pallet P on the table (24
) and fix it. and the camera (27) of the cutter (4).
) and (27) read the positions of the marks M and M on the green sheet G, and if there is a positional deviation of the cutter (4) with respect to the knife (26) in the X-axis direction or a twist in the θ-axis direction, Xld is detected.
The green sheet G is adjusted to the correct position by finely adjusting the pallet chuck mechanism (b) using the lm adjusting mechanism (0) and the θ-axis adjusting mechanism (12). Also camera (27L (27)
measures the distance between the marks M, M, divides it into n equal parts, and sends the value of the cutting dimension width to the cutter feed mechanism (5). When reading the mark, the knife (26) of the cutter (4) is at the center of the green sheet G, but when the mark reading is completed, the cutter feeding mechanism (5) moves the knife (26) in the Y-axis direction. Next, the knife cutting push-up mechanism 00 of the push-up mechanism (3) is activated by the rotational action of the eccentric cam 06) to raise the green sheet G together with the pallet P.
A first knife cut is made at the end of the green sheet G, and a single cutting line S is drawn. Note that since the knife (26) is heated by the heater (28), knife cutting is performed smoothly. Next, the knife cutting push-up mechanism 00
The pallet P is lowered, and the cutter feed mechanism (5) moves the knife (26) by the calculated cutting dimension width,
Thereafter, knife cuts are made n+1 times on the green sheet G in the same manner.

Then, as shown in FIG. 4, when the n+1 cutting lines S enter the green sheet G, the green sheet G is unloaded onto the conveyor (2) together with the pallet P, and is taken out at the next pallet take-out position B.

In this way, according to the present invention, the cameras (27), (27) integrated with the knife (26) can
The marks M and M above are read and the knife cut is performed while moving the knife (26) using the cutter feed mechanism (5) based on the values, so the camera and knife can be used as separate devices, just like in a conventional camera and knife. There is no need to adjust the error between the knife and the knife. Then, the device of the present invention reads the marks M and M on each green sheet and uses the knife (26) based on the position.
Since the position of the mark M,
As long as M can be read by the cameras (27), (27), knife cuts can always be made with accurate dimensions.

Further, according to the present invention, the heat of the heater (28) that heats the knife (26) is blocked by the heat insulating Fi (29) to prevent it from being transmitted to the cameras (27), (27). The measurement system is not distorted by thermal expansion, and high dimensional accuracy can be maintained.

(Effects of the Invention) As explained above, the present invention allows green sheets to be cut with a knife into accurate dimensions at all times without being affected by variations in the cutter or the heat of the heater. It can be significantly improved compared to the previous knife cutting device. Therefore, the present invention greatly contributes to the development of industry as a green sheet knife cutting apparatus that eliminates the problems of the conventional apparatus.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a partially cutaway side view thereof, and FIG. 3 is a partially cutaway plan view thereof.
FIG. 4 is a plan view of the green sheet G. (3): Push-up mechanism, (4) Two cutters, (5): Cutter feed mechanism, (26): Knife, (27): Camera, (29): Heat insulation board, P: Pallet, G: Green sheet.

Claims (1)

[Claims] Above the push-up mechanism (3) that clamps and pushes up the green sheet G supported by the pallet P, there is a camera (27) for reading marks attached to the green sheet G.
) and knife (26) are integrated via a heat insulating plate (29), and this cutter (4) is integrated with a camera (27).
) A knife cutting device for a green sheet, characterized in that it is provided with a cutter feeding mechanism (5) that moves the cutter in parallel according to the dimension between marks read by the cutter feed mechanism (5).