JPH068216A - Holding device for utensil made of china and porcelain - Google Patents

Abstract

PURPOSE:To make utensils in all sorts of forms moldable by a device of the same mechanism, by a method wherein after a connecting shaft is biased along the form of a melding foundation from a shaft body by moving a movable body, the movable body is turned by the shaft body and a smoothing iron mold is tilted. CONSTITUTION:A bottom force 9 is arranged movably in a two-dimensional direction of a horizontal plane. Then a shaft 12 is arranged on the lower part of the bottom force 9 and movable being 13 which is moved in a horizontal direction is fitted to the upper part of the shaft 12. Furthermore, a connecting shaft 14 is provided in a standing state on the top of the movable body 13 and the connecting shaft 14 is fitted into a fitting hole 10 in the lower part of the bottom force 9. On the one hand, the shaft center of a driving shaft 16 which performs an up-and-down motion is allowed to coincide with the shaft center of the shaft body 12. A smoothing iron mold which is inclinable freely in an arbitrary direction and constituted of an inner mold 23 molding a cup and an outer mold 24 molding a plate and lid is fitted to the lower end of the driving shaft 16. With this construction, utensils such as cups and lids in all sorts of forms are manufactured by the same mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic article forming apparatus capable of mechanically forming an irregular shaped article such as a cup, a plate and a lid made of ceramics.

[0002]

2. Description of the Related Art Conventionally, mechanical rokuro molding or press molding has been known as a molding means for articles made of ceramics. However, in the former mechanical rocro molding, a plaster mold and a metal trowel are used. The combined turntable is used,
If roughly divided, there are inner iron molding for molding cups and outer iron molding for molding dishes, whichever molding method is used.
Due to the fact that the kneaded clay is rotated and molded, it has the drawback that only a rotationally symmetrical horizontal section having a circular shape can be molded.

In the latter press molding,
It is possible to manufacture irregularly shaped vessels with horizontal cross sections such as ellipses and polygons, but since it is press molding, the molding base does not look like a rokuro molding base, so many strains occur during firing and yield increases. Had a bad drawback.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a cup having an irregular shape by rolling forming in which the part of the lower die and the trowel die that is in close contact with each other is moved along a trajectory that can be arbitrarily set in the lower die.
It is intended to provide a pottery-made pottery forming device capable of forming pottery such as plates and lids, and reducing distortion during firing to improve yield.

[0005]

SUMMARY OF THE INVENTION In view of the problems such as molding difficulty and poor yield based on the above-mentioned prior art, the present invention has an eccentric mechanism interposed between a lower mold and a rotary shaft, and has a specific curve. A ceramic mold forming device is provided, which is characterized in that a mold having a different shape is molded by a lower mold rotating by a lower mold and a trowel mold that can be tilted in any direction at the lower end of a drive shaft whose vertical movement is controlled. It does not eliminate the drawbacks.

Further, as a pottery molding device, a lower die is disposed so as to be movable in a two-dimensional direction in a horizontal plane, and a rotation shaft body whose rotation is controlled is disposed below the lower die. A moving body whose movement is controlled in the horizontal direction is mounted on the upper part of the rotating shaft body, a connecting shaft is vertically fixed on the upper surface of the moving body, and the connecting shaft is fitted into a lower fitting hole of the lower die, On the other hand, the axis of the drive shaft, which is controlled to move up and down, is made to substantially coincide with the axis of the rotary shaft, and a trowel type is attached to the lower end of the drive shaft so as to be tiltable in any direction.

[0007]

In the present invention, the moving body is controlled to move so that the axis of the connecting shaft is eccentric (fixed or variable) from the axis of the rotating shaft by a predetermined amount in accordance with the shape of the molding base, and then rotated. The shaft is controlled to rotate, and the lower mold is rotated so as to draw a specific curve in the plane, and the trowel mold is tilted according to the eccentricity, and the rotary motion causes the kneaded clay and the trowel mold on the lower mold. The partially adhered points on the forming surface are sequentially moved in accordance with the above curve, and the kneaded material is roll-formed to form the forming material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a cup C made of ceramics according to the present invention,
1 is a container forming device for forming a forming base W of a lid F such as a dish D, a teapot, etc. The container forming device 1 has first guide rails 3 and 3a arranged in parallel on a workbench 2, Sliding bodies 4, 4a ... Are mounted on one guide rail 3, 3a, and the sliding bodies 4, 4a are mounted.
A lower base plate 6 having a central opening 5 is fixed to.

On the upper surface of the lower base plate 6, second guide rails 7 and 7a are arranged parallel to each other so as to be orthogonal to the first guide rails 3 and 3a.
The sliding bodies 4, 4a ... Are also mounted on 7a, and the upper base plate 8 is fixed to the sliding bodies 4, 4a .. The upper base plate 8 is movable in a two-dimensional direction within a horizontal plane. .

Reference numeral 9 denotes a lower mold made of metal, rubber, gypsum, etc. The lower mold 9 is replaceably fixed to the upper surface of the upper base plate 8 and coincides with the axis Z1 of the lower mold 9. A fitting hole 10 is formed in the lower surface of the upper base plate 8 on the axis.

Further, the shape of the lower mold 9 is made to correspond to the molding base W formed in an arbitrary shape. For example, in the case of a polygonal cup C, it corresponds to the outer peripheral surface of the cup C. The horizontal cross section that opens upward is formed in a polygonal shape, is formed in a cylindrical shape with a bottom, and is formed with a step portion 9a corresponding to the collar portion C1 of the cup C. In the case of an elliptical dish D, the dish is formed. In the case of the lid F having a circular shape in plan view corresponding to the surface shape of D, and in the case of a circular lid F, the lid F is formed into a circular shape in plan view corresponding to the surface shape of the lid F, and a handle of the lid F is formed. A handle recess 9b corresponding to F1 is formed.

Further, as will be described later, the plan view shapes of the cup C, the dish D and the lid F can be arbitrarily changed according to the eccentricity Y between the rotary shaft body 12 and the connecting shaft 14.

Reference numeral 11 denotes a rotary drive device, and the rotary drive device.
Reference numeral 11 denotes a rotary shaft body 12 whose rotation is controlled by an appropriate drive source (not shown) such as a motor, which is disposed below the workbench 2. Above the rotary shaft body 12, an appropriate drive source such as a cylinder (see FIG. A moving body whose horizontal movement is controlled by (not shown)
13 is mounted, and a connecting shaft 14 is vertically fixed on the upper surface of the moving body 13.

Then, the connecting shaft 14 is fitted into the fitting hole 10 on the lower surface of the upper base plate 8 to control the movement of the moving body 13 to control the axis Z1 of the connecting shaft 14 (the lower die 9 and the fitting hole 10). The same as the shaft center Z1) is eccentric from the shaft center Z2 of the rotary shaft body 12 by an eccentric amount Y of an arbitrary size.

Reference numeral 15 is a trowel type corresponding to the forming base W of the cup C, the dish D and the lid F formed on the lower die 9.
Reference numeral 15 denotes a lower end of a drive shaft 16 which is vertically moved by an appropriate drive source (not shown) such as a cylinder so that the shaft center Z3 substantially coincides with the shaft center Z2 of the rotary shaft body 12, and a swing mechanism 17 is provided therebetween. Trowel type
15 is attached so that it can be tilted only in any direction.

There are various mechanisms as the swinging mechanism 17, and in this embodiment, a spherical journal 18 made of a bearing or the like is provided at the lower end of the drive shaft 16, and the spherical journal 18 is provided above the shaft portion 15a of the trowel type 15. A spherical follower 15b to be formed is inserted, and an anti-rotating pin (not shown) for restricting only the rotation of the trowel mold 15 is provided so that the trowel mold 15 can be tilted only in any direction. As an example, a hub 20, 20a having a pair of pins 19, 19a ... In the diameter direction and an annular torque ring 21 constitute a swinging mechanism 17, which is a hook type universal joint, and the hub 20, 20a is rotated by 90 °. By attaching to the torque ring 21 with the phase shifted, the torque ring
21 moves in the axial direction of the pins 19, 19a ... and the hub 2
0 and 20a rotate around the axes of the pins 19 and 19a ..., and the trowel mold 15 can be tilted only in an arbitrary direction.

In the above hook type universal joint, a trowel type is used.
Shafts on hubs 20 and 20a to restrain rotation of 15
Naturally, 22 and 22a are fixed to the drive shaft 16 and the trowel mold 15.

The swinging mechanism 17 is not limited to the above-mentioned embodiment, and any mechanism can be used so long as it can freely tilt in any direction while the rotation of the trowel mold 15 is restrained. The inclination angle of the trowel mold 15 can be adapted to the cup C, the plate D, and the lid F having an arbitrary shape.

As the trowel mold 15, there are an inner trowel mold 23 for molding the cup C and an outer trowel mold 24 for molding the dish D and the lid F, and the shapes thereof are arbitrary. Corresponding to the base W, that is, in the case of a polygonal cup C,
An inner trowel shaft portion 23a having a polygonal horizontal cross section corresponding to the inner peripheral surface of the cup C is formed, and the lower surface side of the inner trowel shaft portion 23a is outward from the base portion of the inner trowel shaft portion 23a, and the axial center Z4 of the trowel die 15 is formed. An inner iron collar 23b having a substantially conical shape is formed so as to incline downward toward the lower end, and the collar portion C1 of the cup C is formed on the lower surface side of the inner iron collar 23b.
The inner trowel mold 23 is formed by engraving a ridge recess 15c having a predetermined clearance corresponding to the ridge C2 having a polygonal shape in plan view, which is provided around the rotary shaft body 12 and the connecting shaft 14. The inner peripheral surface of the cup C to be molded and a part of the flange portion C1 are in close contact with each other in an inclined state according to the eccentricity Y of.

Regarding the shape of the outer trowel mold 24 in the case of the dish D and the lid F, that is, the outer trowel part 24a is formed in a substantially conical shape by inclining the lower surface downward toward the axis Z4 of the trowel mold 15. To form
The outer trowel portion 24a has at least a radius R of the dish D and the lid F.
The outer trowel shape is formed by forming a radius R2 having a diameter larger than 1 and engraving on the lower surface side a hill recess 15d having a predetermined draft slope corresponding to the hills D2 and F2 of the plate D and the lid F.
24, the rotary shaft body 12 and the connecting shaft 14 are in contact with a part of the dish D and the lid F to be molded in an inclined state according to the eccentricity Y of the rotary shaft body 12 and the connecting shaft 14.

Although the lower die 9 is controlled to move in the above embodiment, the mechanism is not limited to this, and the trowel die 15
The movement may be controlled by a mechanism similar to that of the lower mold 9.

Next, the operation of the pottery product forming apparatus according to the present invention will be described. First, in forming the cup C, the axis Z1 of the connecting shaft 14 of the moving body 13 is changed to the axis Z2 of the rotary shaft 12. , The axis Z3 of the drive shaft 15 and the axis Z of the inner iron mold 23
By making it stand by in a state of being matched with 4, and putting a predetermined amount of kneaded clay X in the lower mold 9, and then lowering the drive shaft 16 to move the inner iron mold 23 into the lower mold 9, The kneaded clay X is caused to flow into the space between the lower mold 9 and the inner iron mold 23.

Then, the movement of the moving body 13 is controlled to control the connecting shaft 14.
When the movable body 13 is fixed by decentering the axis Z1 of the rotary shaft body 12 from the rotary shaft body 12 by a predetermined amount according to the shape of the outer wall portion Wb of the molding base W, etc., the movable body 13 is tiltably supported in any direction by the swing mechanism 17. The inner iron mold 23 that is formed inclines with the eccentricity of the moving body 13 due to the adhesion force between the inner iron mold 23 and the clay X.

After that, by controlling the rotation of the rotary shaft 12, the lower die 9 (upper base plate 8) draws a locus L1 of a specific curve (trigonometric function) in a plane as shown in FIG. As the inner peripheral surface of the lower die 9 and the outer peripheral surface of the inner iron shaft portion 23a of the inner iron die 23 are moved by the rotational movement, as shown in FIGS. 10 to 13, that is, the kneaded clay X and the inner iron axis. Partial contact with the outer peripheral surface of the part 23a follows the curve in sequence, and the inner iron collar 23 of the inner iron mold 23
Since the lower surface side, which is the molding surface of b, is formed in a substantially cone shape, the substantially triangular partial close contact portion between the inner iron brim portion 23b and the kneaded clay X also follows the above curve in sequence and follows. As a result, the kneaded clay X could be roll-formed, and particularly the ridge C2 of the collar portion C1 of the cup C could be well formed without any problems such as cutting during the forming.

Next, regarding the molding of the dish D and the lid F,
The axis Z1 of the connecting shaft 14 of the moving body 13 is set to the axis Z of the rotating shaft 12.
2. Waiting in a state of being aligned with the axis Z3 of the drive shaft 15 and the axis Z4 of the outer iron mold 24, and then placing a predetermined amount of kneaded material X on the lower mold 9 in close contact therewith, and thereafter, the drive shaft. 16 is lowered and the kneaded clay X on the lower mold 9 is pressed by the outer iron mold 24.

The moving body 13 is controlled to move and the connecting shaft 14 is moved.
The axis Z1 of the rotary shaft body 12 is eccentric from the axis Z2 of the rotary shaft body 12 by a predetermined amount in accordance with the shape of the outer wall portion Wb of the molding base W, such as the wall thickness.
When 13 is fixed, the outer iron mold 24, which is supported by the swinging mechanism 17 so as to be tiltable in any direction, tilts with the eccentricity of the moving body 13 due to the contact force between the outer iron mold 24 and the clay X. To do.

Thereafter, by controlling the rotation of the rotary shaft body 12, the lower mold 9 (upper base plate 8) makes a rotary motion while drawing a movement locus L1 according to a specific curve (trigonometric function) in the same manner as described above. The kneaded clay X on the lower mold 9 due to the rotational movement
Since the lower surface side, which is the molding surface of the outer trowel portion 24a in the inclined outer trowel die 24, has a substantially conical shape, the outer trowel portion 24a and the kneaded clay X have a substantially triangular partial contacting point. Sequentially follow the above curve, whereby the kneaded clay X is roll-formed to form the forming base W.

Next, when the cup C, the dish D and the lid F are elliptical, in the process of rotating the rotary shaft body 12 once, the moving body 13
20 shows the movement locus L2 of the lower die 9 by variably controlling the eccentricity Y of FIG.
As shown in Fig. 3, by forming an elliptical shape corresponding to the shapes of the cup C, the dish D, and the lid F, the molding base W having an arbitrary shape is formed.
Can be achieved.

After the trowel mold 15 is raised by the drive shaft 15, the molding base W is released from the mold.

[0030]

In summary, according to the present invention, the lower mold 9 is arranged so as to be movable in the two-dimensional direction in the horizontal plane, and the rotary shaft body 12 whose rotation is controlled is arranged below the lower mold 9, and the rotary shaft 12 is rotated. A moving body 13 whose movement is controlled in the horizontal direction is mounted on an upper portion of a shaft body 12, a connecting shaft 14 is vertically fixed on the upper surface of the moving body 13, and the connecting shaft 14 is fitted into a lower fitting hole of a lower die 9. A trowel type 15 is fitted in the shaft 10, and on the other hand, the shaft center Z3 of the drive shaft 16 which is vertically controlled is made to substantially coincide with the shaft center Z2 of the rotary shaft body 12, and the lower end of the drive shaft 16 can be tilted in any direction. Since it is mounted, the moving body 13 is controlled to move so that the axis Z1 of the connecting shaft 14 is eccentric (fixed or variable) from the axis Z2 of the rotary shaft 12 by a predetermined amount in accordance with the shape of the forming base W.
Thereafter, the rotary shaft body 12 is rotationally controlled to rotate the lower die 9 so as to draw a specific movement locus L1, L2 ... In the plane, and the trowel die 15 is tilted according to the eccentricity.
By this rotary motion, the kneaded clay X on the lower mold 9 and the partially contacting points of the molding surface of the iron mold 15 are sequentially driven along the above curve to roll-mold the kneaded clay X, thereby forming a circular or elliptical shape. ,
It is possible to manufacture cups C, plates D, lids F and the like of any shape such as polygonal shapes with the device having the same mechanism.

Further, since this molding state can be made to have the same characteristics as those of the rokuro molding, it is possible to significantly reduce the occurrence of strain during firing and improve the yield, as compared with the press molding, and to obtain a casting mold. The sand mold to be used can be molded in the same manner, and its practical effect is very large.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a pottery molding device for molding a cup according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view on arrow B of FIG.

FIG. 4 is an exploded perspective view of a rotating shaft body and an upper base plate before connection.

FIG. 5 is a cross-sectional view of a main part of a swing mechanism of a rotating shaft body and a trowel type.

FIG. 6 is an exploded perspective view of another embodiment of the swing mechanism of the same.

FIG. 7 is a diagram showing a locus of movement of the lower die shaft center when the eccentric amount between the lower die shaft center and the rotating shaft body center is fixed when the forming substrate is formed.

FIG. 8 is a cross-sectional view showing a state in which the inner iron mold is lowered into the lower mold containing the kneaded material in the molding of the cup.

FIG. 9 is a sectional view showing a state in which the upper and lower molds are eccentric by a predetermined amount and molded.

FIG. 10 is a view showing a forming state of the kneaded clay and the inner iron shaft portion at a point P1 shown in FIG. 7 in the same forming step.

FIG. 11 is a diagram showing a forming state of the kneaded clay and the inner iron shaft at a point P2 shown in FIG. 7 in the same forming step.

FIG. 12 is a view showing a forming state of the kneaded clay and the inner iron shaft portion at a point P3 shown in FIG. 7 in the same forming step.

13 is a view showing a forming state of the kneaded clay and the inner iron shaft portion at a point P4 shown in FIG. 7 in the same forming step.

FIG. 14 is a schematic perspective view of a ceramic article forming device for forming a dish.

15 is a sectional view taken along line CC of FIG.

FIG. 16 is a cross-sectional view showing a state where the outer iron mold is lowered onto the kneaded material on the lower mold in forming the dish.

FIG. 17 is a cross-sectional view showing a state in which the upper and lower molds are eccentric by a predetermined amount and molded.

FIG. 18 is a schematic perspective view of a ceramic article forming device for forming a lid.

19 is a cross-sectional view taken along line DD of FIG.

FIG. 20 is a diagram showing a locus of movement of the lower mold axis when the amount of eccentricity is varied when molding the molding substrate.

FIG. 21 is a perspective view of a cup.

FIG. 22 is a rear perspective view of the plate.

FIG. 23 is a rear perspective view of the lid.

[Explanation of symbols]

 9 Lower die 10 Fitting hole 12 Rotating shaft body 13 Moving body 14 Connecting shaft 15 Trowel type 16 Drive shaft

Claims (1)

[Claims] 1. A lower die is movably arranged in a two-dimensional direction in a horizontal plane, a rotary shaft body whose rotation is controlled is arranged below the lower die, and a rotary shaft body is horizontally provided above the rotary shaft body. A moving body whose movement is controlled is mounted, a connecting shaft is vertically installed and fixed on the upper surface of the moving body, and the connecting shaft is fitted into a lower fitting hole of a lower die, while the vertical movement of a drive shaft is controlled. A ceramic molding device characterized in that the shaft center is made to substantially coincide with the shaft center of the rotary shaft body, and a trowel shape that is tiltable in any direction is attached to the lower end of the drive shaft.