JPH0215343B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a ceramic green sander.

(Prior art) Normally, when manufacturing ceramic products such as toilet bowls and wash basins, slurry is molded into a predetermined shape using a mold, then the mold is removed to take out the green base, and the green base is processed before final firing. The flash formed on the surface of the steel is removed by polishing. Conventionally, this flash removal work was done manually. That is, the casting flash of the demolded green body was first scraped off with a metal plate, and then the scraped surface was wiped with a lightly dampened sponge to finish the work.

(Problem to be solved by the invention) However, manual flash removal is not only inefficient, but also tends to cause hangnails on the cut surface when scraping flash with a metal plate, and sponge water Because it is difficult to properly squeeze out the water, there may be too much water and the water flows over the raw material surface when wiping with water, causing defects such as swelling or dripping on the raw material surface, or there is too little water and there is no water wiping. There were problems such as the effect was not improved and the metal plate was easily cut while it was still being cut.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a green substrate polishing machine that can remove flash with high efficiency and without producing surface defects such as hangnails, swelling, sag, and cuts.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes a support body that can selectively move between a polishing position and a polishing tool cleaning position, and a support member fixed to the support body, a cam member having the same contour as the contour of the part of the ceramic green product to be polished; an abrasive tool support guided along the contour of the cam member; A polishing machine body comprising a cylindrical polishing tool that rotates around its own axis and simultaneously moves linearly along the cylindrical axis; and a polishing machine provided at the cleaning position, comprising a cleaning drum, a fountain nozzle, and an air injection nozzle. and a cleaning device, and the polishing tool is a ceramic green substrate polishing machine comprising a sealed cylindrical body having a peripheral wall made of an elastic body and a cloth-like abrasive material fitted onto the peripheral wall of the sealed cylindrical body. provide.

(Function) As described above, in the green body polishing machine of the present invention, the polishing tool support is guided along the contour of the cam member having the same contour as the contour of the portion of the ceramic green body product to be polished. The abrasive tool attached to the abrasive tool support rotates around the cylindrical axis and at the same time moves linearly along the cylindrical axis to remove flash from the green green product. The work efficiency is high because the work is done by machines rather than by hands. In addition, the cloth-like abrasive material fitted around the peripheral wall made of an elastic body of the sealed cylinder comes into contact with the green substrate surface with a soft and uniform pressing force, polishing the green substrate surface. No hangnails occur. Furthermore, since the cloth-like abrasive material is given an appropriate amount of moisture by the cleaning device, surface defects such as swelling, sagging, and cuts do not occur on the green substrate surface.

(Example) Hereinafter, an example of the ceramic green material polishing machine according to the present invention will be described with reference to the accompanying drawings. This example is
Although this machine has been shown to be used for polishing the bonded part of the body rim of a seated toilet, it can also be used as a polisher for other ceramic raw materials.

As shown in FIG. 1, the green substrate polishing machine of the present invention is comprised of a polishing machine main body 10A, a cleaning device 10B, and a green substrate product conveying device 10C.
The polishing machine main body 10A includes a support 1 that can selectively move between a polishing position A and a polishing tool cleaning position B.
It has 2. 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. Cam surface 14' of this cam member 14
has the same contour as that of the portion 18 of the green material product 16 to be polished (in the illustrated example, the inner circumferential surface of the rim 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 connected for relative rotation to a threaded rod 26, which threadedly engages the sleeve 28 through an internally threaded sleeve 28. Female thread sleeve 28
is fixed to a bracket 30 which is connected to the support 12 via a slide rod 32 and a guide sleeve 34 (which is rotatably connected to the support 12 about 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. As 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 in either an upward or downward direction along a vertical guide 38 (fixed to the bracket 30). With such a configuration, the cylindrical polishing tool 20
is rotated around the cylindrical axis by the motor 24, and linearly moved along the cylindrical axis by the motor 36.

Next, a mechanism for moving the polishing tool 20 along the contour of the portion 18 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. The bracket 30 further includes an idle roller 44.
A support member 46 for supporting is slidably attached. The idle roller support member 46
is constantly moved by arrow 48 by a spring (not shown).
It is pulled in the direction shown by , that is, in the direction toward the roller 42 . Therefore, the peripheral surface of the cam member 14 is pressed between the roller 42 and the idle roller 46, and the roller 42 is pressed against the cam surface 14' by the reaction force caused by the tensile force of the spring.
If the motor 40 is driven in this state, the roller 42
The friction force between the roller 42 and the cam surface 14'
rolls along the cam surface 14'. As shown in FIG. 2, the contour 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 contour.
rolls along the cam surface 14', the support 1
The radius of rotation of the roller 42 about 2 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 roll smoothly along the cam surface 14'.

During the polishing operation, the rotation axis of the polishing tool 20 traces a trajectory indicated by A→B→C→D, as shown in FIG. In other words, the polishing work starts at point A,
At point B, the outer circumferential surface of the polishing tool 20 comes into contact with the portion 18 to be polished for the first time, continues to make contact until point C, and finally reaches point D, completing one cycle. Although approximately half the circumference of the portion 18 to be polished is polished in one cycle of this polishing operation, it is also possible to polish the entire circumference in one cycle.

During the transition from A to D, the cylindrical polishing tool 20 rotates around the cylindrical axis by the drive of the motor 24, and at the same time performs vertical linear motion along the cylindrical axis by the drive of the motor 36. 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 C in FIG. 2, it is at the position C' in FIG. 1. In this way, by moving the polishing tool 20 vertically during the polishing operation, almost the entire surface of the abrasive material (cylindrical abrasive cloth) of the polishing tool 20 can be used. Even though soft green substrates that are prone to clogging are being polished, clogging can be kept to a minimum. As explained above, the polishing machine main body 10A removes burrs, that is, polishes the green substrate with high efficiency.

Next, the cleaning device 10B for the polishing tool 20 will be explained. One cycle of the polishing operation ends at point 2, when the polishing tool 20 has been raised to the height shown by the solid line in FIG.
Next, by horizontally moving the support 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. The cleaning drum 50 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. Washing drum 50
Therein are respective fountain nozzles 58 connected to flexible water supply hoses 54 and air supply hoses 56.
and an air injection nozzle 60. 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 20 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, the polishing tool 20 is then removed from the air injection nozzle 60.
By injecting air for a certain period of time towards
Blow off excess water to ensure that the abrasive contains just the right amount of water. As for the injection time of water and air, find the time when the degree of clogging removal and the degree of water content are optimum, and by controlling each time with a timer, you can always maintain the optimum conditions without requiring special skill. can be obtained. As explained above, since an appropriate amount of moisture is always supplied to the abrasive material of the polishing tool 20 by the cleaning device 10B, surface defects such as swelling, sagging, and cuts do not occur in the green substrate. Furthermore, since the cleaning position B of the polishing tool is different from the polishing position A, there is no fear that splashes of cleaning water will be splashed onto the green substrate and cause defects such as swelling or dripping on the surface.

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 16 is placed on a receiving box 62 and conveyed by a conveyor 64 to almost directly below the polishing position A. The entire air fryer 66 is then lifted up by a hydraulic cylinder (or air cylinder) 68 and brought into contact with the lower surface of the receiving box 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.
The green product 16 is also floated together with the top plate 72 and the cradle 62. Therefore, the movable positioning member 74 (first
2) in the direction of the arrow toward the fixed positioning member 76, the green product 16 is positioned exactly below the polishing position A.

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 rubber. Since the peripheral wall 86 is made of an elastic material such as rubber, the air injection valve 8
When air is injected from 8, the peripheral wall 86 expands,
Abrasive material 82 will be elastically supported. Therefore, the abrasive material 82 is pressed against the area to be polished with a soft and uniform pressing force.
Even if it is a relatively soft material like raw material,
Can be polished without causing hangnails. Further, since the abrasive material 82 is made by fixing abrasive particles to a woven fabric such as nylon with an adhesive, it can be formed thinly, and clogging can be easily removed by spraying water. It is also possible to easily replace the abrasive material 82 by discharging air from the air injection valve 88.

(Effects of the Invention) As described above, in the green substrate polishing machine of the present invention, the polishing tool support is moved along the contour of the cam member having the same contour as the contour of the portion of the ceramic green substrate product to be polished. The abrasive tool guided and attached to the abrasive tool support rotates around the cylindrical axis and at the same time moves linearly along the cylindrical axis to remove flash from the green green product. The work efficiency is high because the work is done by machines rather than by hands. In addition, the cloth-like abrasive material fitted around the peripheral wall made of an elastic body of the sealed cylinder comes into contact with the green substrate surface with a soft and uniform pressing force, polishing the green substrate surface. No hangnails occur. Furthermore, since the cloth-like abrasive material is given an appropriate amount of moisture by the cleaning device, surface defects such as swelling, sagging, and cuts do not occur on the green substrate surface. Accordingly, the present invention provides a green substrate polishing machine that can remove flash with high efficiency and without producing surface defects such as hangnails, swelling, sagging, and cuts.

[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, 10B...Cleaning device,
10C... Green product conveying device, 12... Support body, 14... Cam member, 20... Polishing tool.

Claims (1)

[Claims] 1 a support 12 that can be selectively moved between a polishing position A and a polishing tool cleaning position B;
a cam member 14 fixed to 2 and having the same contour as the contour of the part of the ceramic green product 16 to be polished;
, an abrasive tool support 22 guided along the contour of the cam member 14, and a cylindrical tool that is attached to the abrasive tool support 22 and that rotates around the cylindrical axis and at the same time moves linearly along the cylindrical axis. A cleaning device 10B is provided at the cleaning position B and includes a cleaning drum 50, a water fountain nozzle 58, and an air injection nozzle 60. Reference numeral 20 denotes a sealed cylindrical body having a peripheral wall 86 made of an elastic body, and a cloth-like abrasive material 8 fitted onto the peripheral wall 86 of the sealed cylindrical body.
A ceramic raw material polishing machine characterized by comprising: 2.