JPS60104649A - Polishing machine for porcelain blank - Google Patents

Abstract

PURPOSE:To aim at enhancing the efficiency of polishing, by providing such a polishing machine for blanks of porcelains such as, for example, toilet stools, that a cylindrical polishing tool is revoluted about the cylindrical axis thereof, and as well is moved along the cylindrical axis to polish burrs on the blank of a porcelain. CONSTITUTION:A blank polishing machine comprises a polishing machine body 10A, a washing device 10B and a blank article transfer device 10C. The polishing machine body 10A has a support member 12 which may be selectively moved between a polishing position A and a polishing tool washing position B. The contour of the cam surface 14' of a cam member 14 secured to the support member 12 has the same shape as that of a part, to be polished, of a blank 16. A cylindrical polishing tool 20 is supported to a polishing tool support member 22, and is rotated by a motor 24. The cylindrical polishing tool 20 is revoluted about the cylindrical axis thereof by means of the motor 24 and as well is rectlinearly moved along the cylindrical axis by a motor 36.

Description

[Detailed Description of the Invention] Normally, when manufacturing ceramic products such as toilet bowls and wash basins, slurry is molded into a predetermined shape using a mold, and then the mold is removed to take out the raw material before final firing. The cast iron that forms on the surface of the raw material is removed by polishing. Conventionally, this flash removal work was done manually. In other words, the molded green cast member was first scraped off with a metal plate, and then the scraped surface was finished by wiping it with a lightly dampened sponge.This manual method Not only is it inefficient, but it also tends to cause hangnails on the cut surface when scraping the mold with a metal plate, and it is difficult to squeeze out the water from the sponge (i.e., if it contains a lot of water, When wiping with water, water flows over the raw material surface, but if there is too little moisture, wiping with water is not effective, and the metal plate is likely to be cut as it is.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a green pottery polishing machine which is highly efficient and can eliminate the above-mentioned disadvantages of manual polishing by mechanically polishing the burrs of green ceramic pottery.

In order to achieve the above objective, it is important to note that since the object to be polished is made of a relatively soft material such as green ceramic material, the polishing tool is easily clogged, and therefore the entire polishing surface of the polishing tool is The aim is to prevent clogging as much as possible by using Therefore, in the present invention, this problem is solved by causing the cylindrical polishing tool to rotate around the cylinder axis and to move linearly along the cylinder axis at the same time.

Another important point in achieving the above objective is to contain an appropriate amount of moisture in the polishing tool. For this reason, in the present invention, when cleaning the abrasive tool, water is first injected onto the abrasive tool to remove clogging, and then air is injected to remove the moisture from the abrasive tool, thereby removing the appropriate amount of moisture in the summer. It is intended to be included.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a ceramic green material polishing machine according to the present invention will be described with reference to the accompanying drawings. Although this embodiment has been shown as a polisher for polishing the body rim bonded portion of a seated toilet, it can also be used as a polisher for other green earthenware materials.

It can be used.

As shown in FIG. 1, the green substrate polishing machine of the present invention is composed of a polishing machine main body 10A, a cleaning device 10B, and a green substrate product conveying device 10C. It has a support 12 that is selectively movable between A and an abrasive tool cleaning position B. Selective movement of the support body 12 may be performed by a known method using a power source such as a hydraulic cylinder (not shown). A cam member 14 is fixed to the support body 12. The contour of the cam surface 14' of this cam member 14 is defined by the area to be polished (
In the illustrated example, it has the same contour as the inner circumferential surface portion (18) of the rim portion of the toilet bowl. A cylindrical polishing tool 20 is supported by a polishing tool support 22 and rotationally driven by a motor 24 . The abrasive tool support 22 is rotatably connected to the threaded rod 26 and
6 passes through the sleeve 28 provided with an internal thread to the sleeve 2.
It is screwed together with 8. The female threaded sleeve 28 is attached to the bracket 3
0, and the bracket 30 is connected to the support 12 via a slide rod 32 and a guide sleeve 34 (which is rotatably connected to the support 12 by the rotation of the support 12). . The threaded rod 26 is rotated by a motor 36 attached to a support plate 37. Support plate 3
7 is fixed to a bracket 30, although not shown. When the threaded rod 26 is rotated in either direction, the internally threaded sleeve 28 remains vertically stationary so that the threaded rod 26 is moved either upwardly or downwardly, thus causing the abrasive tool support 22 and the abrasive The tool 20 is also moved either upward or downward along a vertical guide 38 (fixed to the bracket 30). With such a configuration, the cylindrical polishing tool 2
The motor 24 rotates the cylindrical axis of the cylinder o, and the motor 3G moves the cylinder linearly along the cylindrical axis.

Next, a mechanism for moving the polishing tool 20 along the contour of the portion l8 of the green product 16 to be polished will be described.

A motor 40 is attached to the bracket 30, and the motor 40 rotates a roller 42 made of a material with a large coefficient of friction, such as rubber. A support member 46 for supporting an idle roller 44 is further slidably attached to the bracket 30. The idle roller support member 46 is constantly pulled in the direction indicated by an arrow 48, that is, in the direction toward the row 242, by a spring (not shown).

Therefore, the peripheral surface of the cam member 14 is pinched between the roller 42 and the idle roller 46, and the roller 4
2 is a reaction force due to the tensile force of the spring, and the cam surface 14'
Pressed by If the motor 40 is driven in this state, the friction force between the roller 42 and the cam surface 14' causes the roller 40 to
2 rolls along the cam surface 14'. As shown in FIG. 2, the outline of the portion 18 of the green product 16 to be polished is nearly elliptical, and the cam surface 14' is also formed to have the same outline, so that the roller 42 is 14', the radius of rotation of the roller 42 about the support 12 changes sequentially. This change in the radius of rotation is compensated by the slide rod 32 being able to slide freely relative to the guide sleeve 34 in response to the change, so that the roller 42 can be smoothly displaced along the cam surface 14'.

During the polishing operation, the rotation axis of the polishing tool 200 traces a trajectory indicated by A → B → C → 2, as shown in FIG.

That is, n) f M operation is started at point A, the outer circumferential surface of the polishing tool 20 contacts the part 18 to be polished for the first time at point C, continues contact at point c, and finally at point 2. reached/cycle completed. Although approximately half the circumference of the polishing surface 18 is polished in each cycle of this polishing operation, the entire circumference may be polished in each cycle.

During the process from A to B, the cylindrical polishing tool 20 is moved by the motor 24.
At the same time, it rotates around the cylindrical axis due to the drive of
By driving the motor 36, vertical linear movement is performed along the cylinder axis. That is, at the time point A in FIG. 2, the height of the polishing tool 20 is at the position A' in FIG. 1, and at the time point No. in FIG. 2, it is at the position 8' in FIG. 1. In this way, by moving the abrasive tool 20 in the vertical direction during the abrasive operation, the abrasive material (cylindrical abrasive cloth) of the abrasive tool 20 is
This means that almost the entire surface of the abrasive tool can be used to minimize clogging, even when polishing soft raw materials that are prone to clogging of the abrasive material. No. 20 cleaning device 10B will be explained. The polishing operation/cycle ends at the second point,
The height of the polishing tool 20 has then been raised to the height indicated by the solid line in FIG.

Next, by horizontally moving the support body 12 from the polishing position A to the polishing tool cleaning position B (to the left in FIG. 1), the entire polishing machine main body 10A is moved to the left, and therefore the polishing tool 20 is also moved to the left and positioned above the cleaning drum 50 of the cleaning device @10B. Washing drum 5
0 is supported by a hydraulic cylinder (or pneumatic cylinder) 52 which is extended to lift the cleaning drum 50 to a position where the cleaning drum 50 just surrounds the polishing tool 20. Within the cleaning drum 50 are a water fountain nozzle 58 and an air injection nozzle 6 connected to flexible water supply hoses 54 and air supply hoses 56, respectively.
0 is set. Therefore, first, water is jetted from the fountain nozzle 58 toward the polishing tool 20 for a certain period of time to remove the polishing debris from the green base material that has adhered to the polishing tool 20.

As a result, the clogging of the polishing tool 200 is eliminated and the polishing tool 20 is regenerated. However, as it is, the abrasive material (abrasive cloth) of the polishing tool 20 is impregnated with excessive water, and the next polishing operation cannot be performed as it is. Therefore, by injecting air from the deficient air injection nozzle 60 toward the polishing tool 20 for a certain period of time, excess water is blown off and the abrasive material contains an appropriate amount of water. As for the water and air injection time, find out the time when the degree of clogging removal and water content are optimal, and by controlling each time with a timer, you can always obtain the optimal conditions without requiring special skill. be able to.

Next, a description will be given of the green base product conveying device 10C for accurately positioning the green base product 16 directly below the polishing position A of the polishing machine main body 10A. The raw material product 16u is placed on the passive 62 and polished by the compare 64 M
It is transported almost directly below A. Therefore, the entire air fryer 66 is connected to a hydraulic cylinder (or air cylinder) 68.
lift it up and bring it into contact with the lower surface of the passive 62. next,
When compressed air is blown out from the lower plate 70 of the air fryer 66, the upper plate 72 floats up from the lower plate 70, and the green product 1
6 also floats up together with the upper plate 72 and the passive 62. There,
By moving the movable positioning member 74 (FIG. FF1, FIG. 1) in the direction of the arrow toward the fixed positioning member 76, the green product 16ii is accurately positioned directly below the polishing position.

Finally, the polishing tool 20 will be explained in detail based on FIG. The polishing tool 20 is composed of a sealed hollow cylindrical body fixed to a rotating shaft 80 and a cylindrical abrasive material (abrasive cloth) 82 fitted into the outer peripheral surface of the hollow cylindrical body. The end wall 84 of the sealed hollow cylindrical body is made of a relatively rigid material since it is fixed to the rotating shaft 80, but the peripheral wall 86 is made of an elastic material such as a comb. Since the peripheral wall 86 is made of an elastic material such as rubber, when air is injected through the air injection valve 88, the peripheral wall 86 expands and the abrasive material 82
will be supported elastically. This means that when polishing relatively soft materials such as raw materials or materials that tend to have shape differences due to shrinkage, a soft and uniform pressing force is applied to the area to be polished, regardless of the size of the polish. It can be polished with high precision and has the effect of preventing hangnails from occurring. The crushed abrasive material 82 is
Since the abrasive particles are fixed to a woven fabric such as nylon using an adhesive, it can be formed thinly, and the clogging material 9 can be easily removed by spraying water. Furthermore, by discharging air from the air injection valve 88, it is also possible to easily replace the LJi abrasive material 82.

[Brief explanation of drawings]

FIG. 1 shows a schematic structure of a ceramic green material polishing machine according to the present invention. FIG. 2 is a plan view for explaining the polishing operation and the positioning operation of the green substrate product by the green substrate polishing machine of the present invention. FIG. 3 is a sectional view showing a schematic configuration of a polishing tool used in the green material polishing machine of the present invention. 10A・・・・・・Sanding machine body, IOB・・・
......Cleaning device, IOC......Green product conveyance device, 12......Support,
14...Cam member, 20...
...Abrasive tools, Figure 1, Figure 2, Figure 3

Claims (3)

[Claims] (1) A support that can be selectively moved between a polishing position and a polishing tool cleaning position, and a cam member fixed to the support that has the same outline as the part of the ceramic green body to be polished. a cam member for guiding the abrasive tool support along the contour when the support is in the abrasive position; and a cylindrical abrasive tool attached to the abrasive tool support that guides the abrasive tool support along the cam member. What is claimed is: 1. A grinding machine for green pottery, comprising a grinding tool that rotates around a cylindrical axis and simultaneously performs linear motion along the cylindrical axis when guided by the cylindrical axis. (2) a support body that can be selectively moved between a polishing position and a polishing tool cleaning position; and a cam member fixed to the support body, which has the same contour as the contour of the portion of the ceramic green body to be polished; a cam member for guiding the abrasive tool support along the contour when the support is in the abrasive position; and a cylindrical abrasive tool attached to the abrasive tool support that guides the abrasive tool support along the cam member. an abrasive tool that rotates its cylindrical axis and simultaneously moves linearly along the cylindrical axis when guided by the abrasive tool; and a cleaning device installed at the cleaning position that injects water toward the abrasive tool. A cleaning device for cleaning a polishing tool by jetting air after polishing the polishing tool. (3) The polishing tool is formed as a sealed cylindrical body, and the peripheral wall of the sealed cylindrical body is made of an elastic material and expands when the sealed cylindrical body is filled with air. The earthenware green material polishing machine according to any one of item 1 or 2.