JPS6335436B2 - - Google Patents

Description

[Detailed description of the invention] The present invention contains ink inside the roller body,
The present invention relates to a stamp roller that does not require an inking operation and a manufacturing method thereof.

A stamp roller is known as a device for printing desired characters, designs, etc. on a desired surface. Normally, this stamp roller applies the necessary ink via an ink pad or an ink adhesion roller, and then presses it onto the desired surface to print letters, designs, etc. A porous roller for printing has also been developed in which the roller body is made porous and impregnated with ink in order to eliminate the need for this operation.

Such porous rollers for printing are usually made of rubber, plastic, etc., but they have drawbacks in terms of wear resistance, solvent resistance, dimensional stability, etc., and have the disadvantage of causing clogging. .

On the other hand, porous metals used in oil-impregnated bearings are known as porous materials, but conventional porous metals have coarse pores and a small pore occupancy, making them difficult to push. When used as a marking roller, the ink does not ooze out smoothly, and the printed surface becomes unclear, so that practicality is hardly improved, especially when fine letters and designs are required.

The inventors of the present invention have conducted extensive research in order to overcome the drawbacks of conventional porous printing rollers made of rubber or plastic, and to develop a stamping roller that will not wear out or become clogged even after long-term use. As a result of repeated processes, when easily water-soluble salt particles are sintered under pressure, a series of holes are formed between the particles that are connected to each other by sintering, and the voids between the particles are connected to the outside due to the discharge of vaporized gas. This sintered body is used as an inner mold for precision casting using the same metal as die casting, and then the easily water-soluble salt portion of the inner mold is removed to form a porous metal body. It was discovered that this material is a suitable material for the main body of the marking roller, and based on this knowledge, the present invention was developed.

That is, the present invention consists of a metal porous cylindrical body having fine continuous pores with a size in the range of 30 to 500μ in a proportion where the total volume of the pores is 40 to 80% of the total volume. To provide a stamp roller, which is formed by attaching necessary shafts and supports to a roller body on which necessary characters, designs, etc. are engraved on the surface.

Materials constituting the stamp roller of the present invention include tin, bismuth, zinc, lead, aluminum,
Metals such as antimony, magnesium, silver, iron, gold, manganese, beryllium and alloys thereof can be used.

These must be formed into a porous body that has fine continuous pores with a size in the range of 30 to 500μ, and the total volume of the pores accounts for 40 to 80% of the total volume. be. If the pore size is less than 30μ or the pore occupancy is less than 40%, the ink will not ooze out smoothly when stamping.
When the pore size becomes larger than 500μ or the pore occupancy becomes larger than 80%, the overall strength decreases, and the amount of ink that flows out becomes too large, causing sagging and bleeding in printing. become. When formed as a metal body having fine continuous pores in the range of 30 to 500μ in a ratio of 40% to 80% of the total volume of the roller,
The contained ink oozes out smoothly, the ink retention is sufficient, and the printing life is long and suitable.

According to the present invention, such a stamp roller is produced by filling a mold with easily water-soluble salt particles adjusted to a predetermined particle size, and then heating the mold together to sinter the easily water-soluble salt to form the particles. After forming fine gaps in between that are in contact with each particle and open to the outside by communicating with each other, molten metal is press-fitted into this mold to penetrate into the fine gaps, and after cooling, it is After cutting into the desired circular shape and engraving letters, designs, etc. on its surface, it is washed to remove easily water-soluble salt particles.
It can be manufactured by forming fine continuous pores with a size in the range of 30 to 500 microns, and then attaching the necessary shafts and supports to the roller body thus obtained.

Examples of readily water-soluble salts used include sodium chloride, stannous chloride, zinc chloride, cupric chloride, magnesium chloride, potassium chloride, barium chloride, magnesium sulfate, and potassium phosphate.

Next, the manufacturing sequence of the stamp roller of the present invention will be explained by taking as an example the case where sodium chloride is used as the easily water-soluble salt and aluminum is used as the metal. Fill with sodium chloride particles sorted to a range of sizes.

(b) The sodium chloride particles are roasted together with the mold at a predetermined temperature, and a series of fine gaps that connect the original gaps between the particles and open to the outside surface are reduced by 40 to 80%.
Sinter at a volume ratio of

(c) Molten aluminum is press-fitted into the heated mold, permeates into the fine gaps, and then cooled.

(d) A lump consisting of penetrating metal and sodium chloride particles is taken out from the mold and finished to a specified size, and the required printing is engraved on the surface.

(e) The whole is washed, and the sodium chloride particles in contact with each other are sequentially eluted and removed from the outside, forming continuous pores.

(f) Attach the necessary shafts and supports.

(g) Depending on the intended use, the product is impregnated with ink in this state.

According to this method, when printing or engraving designs on the surface of the roller, the engraving is done on a block consisting of permeated metal and sodium chloride particles, so continuous pores are not crushed or deformed and continuous pores are created during engraving. There is no possibility of clogging due to fine powder, etc.

Next, embodiments of the stamp roller of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an example of the stamp roller of the present invention, which includes a roller body 1 made of porous metal and a shaft 3 that is attached through a shaft hole 2 of the roller body 1. The roller body 1 is rotatably attached to the support 4. The surface of this roller body is formed with convex printing 5, and the entire roller body 1 is impregnated with ink, so when the surface of the roller body 1 is pressed and rotated against paper, etc., the paper surface A stamp 5' corresponding to the print 5 is printed.

This roller body 1, as shown in FIG.
It is also possible to increase the amount of ink held by forming a double structure in which an inner cylinder 7 with continuous pores of a slightly larger size is fitted into an outer cylinder 6 made of a predetermined material. In this case, it is necessary for the outer cylinder 6 to have the occupancy of the entire pore volume within the range of 40 to 80%, but for the inner cylinder 7, even if this is within the range of 50 to 90%. good.

Such a double structure roller can be manufactured, for example, as follows.

That is, a cylindrical partition having a smaller diameter is formed inside a hollow bottomed cylindrical mold. Next, sodium chloride particles (30 μ~
200μ) and sintered. Next, the partition is removed, and the inner space (corresponding to the inner cylinder) is filled with sodium chloride particles (60μ to 500μ), which have a larger particle size than those filled in the outer space, and sintered again.

In this way, a sintered body of two layers of sodium chloride particles having different particle sizes is formed, and the molten metal is press-injected into this sintered body, and the sintered body is manufactured according to the method described above.

Further, as shown in FIG. 3A or B, the stamp roller of the present invention can be manufactured by placing a partition plate 8 in a mold in advance and casting it in the same manner as described above. It can also be configured to have surfaces colored in multiple colors.

As explained above, the present invention is based on conventional rubber,
Compared to porous rollers such as plastic, it has many advantages, such as the sharpness of printing and the durability of the roller itself, and can also be mass-produced.

The stamping roller of the present invention is suitable as a hand-type printing roller for sticker printing, a printing roller for printers that do not require a type ribbon, a colored printing roller with partitions, a multilayer printing roller formed of multiple layers, etc. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG.
Side sectional view of the roller body with double structure, 3rd
Figures A and B are perspective views of different embodiments. In the figure, numeral 1 is a roller body, 3 is a shaft, 4 is a support, 5 is a print, and 8 is a partition plate.

Claims (1)

[Scope of Claims] 1. Consisting of a metal porous cylindrical body having fine continuous pores with a size in the range of 30 to 500μ in a proportion where the total volume of the pores is 40 to 80% of the total volume. A stamp roller is made by attaching the necessary shaft and support to the roller body, which has the necessary characters, designs, etc. engraved on its surface. 2 Fill a mold with easily water-soluble salt particles adjusted to a predetermined particle size, then heat the mold together to sinter the easily water-soluble salt so that the particles are in contact with each other and communicate with each other. After forming fine gaps open to the outside, molten metal is press-fitted into the mold to penetrate into the fine gaps, and after cooling, it is cut into a desired cylindrical shape, and the surface is coated with After engraving the required characters, designs, etc., washing was performed to remove easily water-soluble salt particles to form fine continuous pores with a size in the range of 30 to 500μ, and then the product obtained in this manner was A method for manufacturing a stamp roller, which comprises attaching a necessary shaft and support to the roller body.