JPH02231114A - Manufacture of sponge roller wire groove - Google Patents

Abstract

PURPOSE:To improve hydro-extracting and water-absorbing functions, by a method wherein a pipe is set up, a resin solution forming a sponge substance is filled up for cure, a through hole is provided by pulling out the pipe, demolded through a cylindrical body and the pipe is stuck close to the through hole of the sponge substance possessing a spiral groove on a circumferential surface, in the cylindrical body provided with a protrusion spirally on the inside. CONSTITUTION:A female mold 7 is formed by fitting detachably a bottom plate 6 possessing a fitting part 5 to the lower end of a cylindrical body and a pipe 8 is set up by fitting the lower end of the pipe 8 in the fitting part 5. A resin solution obtained by reacting thermally a mixed aqueous solutions of vinyl alcohol and starch is filled into the female mold 7. The resin solution is solidified and a sponge substance 10 having a fine and continuous pore is formed within the female mold 7. The bottom plate 6 is removed, the pipe 8 is pulled off, the sponge substance is turned in the opposite spiral direction with a spiral direction of a projected line part 2 and the sponge substance 10 having a spiral groove 12 is pulled out through the cylindrical body 1. A shaft pipe 15 of a vinyl chloride is stuck close to a through hole 11 of the sponge substance 10 and a sponge roller 20 with the groove is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a grooved sponge roller.

"Prior Art" Recently, products have become lighter and thinner, and film materials are often used instead of metal plates, and the wall thickness has become extremely thin, less than 100 μm.

For example, when printing on the surface of a film material that is a light and thin product, the surface of the film material must be washed and dried as a pretreatment because the ink has poor adhesion to the product made of the film material.

However, conventionally, after cleaning the surface of a film material with a wall thickness of 100μ or less, the film material is sandwiched between a pair of upper and lower sponge rollers (sponge-like rollers) to drain off the water adhering to the surface of the film material, and the water is absorbed or removed. Dehydration was technically extremely difficult. That is, when the tip of the film material 14 at the water absorption position touches the circumferential surface of the sponge roller 22, which has no grooves on the circumferential surface, at right angles, as shown in FIG. It has the disadvantage that it gets caught, gets wrapped around the roller, or falls off, resulting in a number of defective products.

``Problems to be Solved by the Invention'' In view of the above-mentioned drawback that the film material gets wrapped around the sponge roller 22 or falls off from the sponge roller, the film material 14 is placed against the sponge roller 22 as shown in FIG. If you feed it in a slightly inclined state, it will be about 90
% was able to be sent out correctly. However, since the film material 14 moves on the sponge roller in an inclined state, the film material overlaps randomly on the stacking table, and when sorting the film material, the film material may be scratched, resulting in a lot of trouble. There was a flaw that made it necessary.

Furthermore, conventionally available sponge rollers have grooves formed by a processing machine on the surface of a sponge cylinder attached to a scissor, but grooves are formed on the peripheral surface of the sponge roller, which is the workpiece.
When grinding with a book-by-book grinder or a cutting tool and a grinding wheel,
Because the sponge roller is soft, it escapes from the cutting edge of the grindstone, etc., making it impossible to form deep grooves, resulting in shallow grooves and a corrugated roller surface.

Furthermore, since the surface film of the sponge roller is scraped off by grinding with a grinding wheel or the like, the surface pores of the sponge are torn and the water absorption function is not perfect and cannot be satisfied.

[Technical Means for Solving the Problems] The present invention has been made in view of the problems of the prior art, and it improves the function of draining and absorbing water adhering to the film material, and also ensures that the film material is firmly attached to the sponge roller. The purpose of this device is to feed the product, and its structure consists of a female mold with a bottom plate with an engaging part in the center removably attached to the bottom of a cylindrical body with convex parts arranged in a spiral shape on the entire inner surface. A pipe is established in the pipe, and a female mold placed around the pipe is filled with a resin liquid that forms a sponge material with fine continuous pores when solidified, and after the resin liquid has hardened, the bottom plate is attached. At the same time, the pipe is pulled out, a through hole is provided, the sponge material is made flexible, the mold is removed from the cylindrical body, and the pipe is fixed to the through hole of the sponge material having a spiral groove on the curved surface. ``Function'' Because a grooved sponge roller with spiral grooves on the entire circumferential surface is formed by molding, the roller surface has a smooth glossy coating in contact with the inner surface of the female mold, which has a high draining function. In addition, since it has a smooth surface with spiral grooves and the fine continuous pores on the surface are not broken, it has a high water absorption function and can reliably feed the film material to the roller.

Embodiment 1 An embodiment of the present invention will be described based on the drawings. FIG. 1 shows the first step, and numeral 1 denotes a cylindrical body formed integrally or separably, with a continuous line formed on the entire smooth inner surface. A convex strip 2 is formed spirally clockwise at an arbitrary angle A. At the lower end of this cylindrical body 1, an engaging portion 5 such as a hole or a concave hole is provided at the center.
A female mold 7 is formed by removably attaching a bottom plate 6 having a
The lower end of the pipe 8 is fitted into the engaging portion 5 of the bottom plate 6 to be established.

In the second step, a resin solution obtained by mixing a polyvinyl alcohol aqueous solution and a starch aqueous solution and causing a heating reaction is filled into the female mold 7 shown in FIG. 1 (FIG. 2).

Here, to explain the mixing of raw materials for the sponge material, polyvinyl alcohol is dissolved 7 to 8 times in water, and
Approximately 35-40% of starch and polyvinyl alcohol (1 m
(amount) is also made into an aqueous solution (approximately 20% of the polyvinyl alcohol aqueous solution).

Furthermore, approximately the same amount or 90% (weight) of formalin as the starch aqueous solution and 65 to 70% sulfuric acid of the starch aqueous solution are mixed, and the mixture is filled into a female mold and reacted.

The dissolution of polyvinyl alcohol is carried out at about 80 to 95°C to cause a heating reaction, and the temperature is about 65 to 70°C when the polyvinyl alcohol aqueous solution and starch aqueous solution are mixed.
When the resin liquid is filled into the container, the temperature becomes about 36 to 38°C.

To explain the third step with reference to FIG. 3, when the resin liquid filled in the female mold 7 solidifies after about 16 hours, a sponge material 10 having fine continuous pores is formed in the female mold 7. .

Sponge substance 10 made by solidifying the resin liquid in the female mold 7
To take out the pipe 8, first remove the bottom plate 6, then remove the pipe 8.
When you pull out the sponge object 10 (
(Fig. 3) can be compressed toward the center by the through hole 11 provided in the center, making it even more flexible. When this sponge material 10 is rotated in a spiral direction opposite to the spiral direction of the protruding strip 2, the sponge material 10 having the spiral groove 12 can be extracted from the cylindrical body 1 using the protruding strip 2 as a guide. .

The spiral groove 12 formed by the convex strip 2 has a depth of about 3 mm, and the angle A of the spiral groove 12 provided on the surface of the sponge material 10 is greater than 0° and smaller than 90° (0
By providing this spiral groove 12, it is possible to prevent the film material 14 from curling when it is fed between a pair of rollers.

In the fourth step, a shaft pipe 15 made of vinyl chloride to be inserted into the through hole 11 provided in the center of the sponge material 10 shown in FIG.
form 0.

Next, to explain the operation of this embodiment, a through hole made of a flexible sponge material 10 having a spiral groove 12 having an angle A smaller than 90° and larger than 0° with respect to the axial direction of the cylindrical body 1 on the entire outer periphery. The grooved sponge roller 20, which is fixed by inserting the shaft vip 15 into the cylindrical body 1, does not require any post-processing such as surface grinding after filling the resin liquid into the cylindrical body 1 and molding the sponge and substance 10. Grooved sponge waller 20
The surface of the film material 14 is smooth with a fine glossy coating peculiar to the molding process, and since the continuous pores on the surface of the sponge material are not soaked, moisture adhering to the surface of the film material 14 is removed by pressure bonding by a pair of rollers. By efficiently draining water and further absorbing water on the surface of the film material with a sponge roller, the dehydration effect can be enhanced and the drying time can be significantly shortened. When the film material 14 from which dirt such as oil has been completely removed by washing with water comes into contact with the grooved sponge roller 20 at right angles, the cough film material 14 is formed in the spiral groove 12 on the surface of the grooved sponge roller. The moisture adhering to the surface of the film material 14 is pressed between the upper and lower sponge rollers 20 and drained, and the water on the surface of the film material is removed by the grooved sponge rollers 20. Because it absorbs water through its fine continuous pores, it drains and absorbs water well, allowing it to be sent out smoothly without getting caught up in the rollers, speeding up drying.

Furthermore, since the grooved sponge V-ra 20 has a spiral groove 12 on its circumferential surface, the film material fed at right angles can be fed out reliably without curling, and it can be stacked neatly on the mounting table. This prevents scratches on the surface of the film material.

"Effect of the invention" The present invention has the following effects.

■The surface of the sponge roller has a smooth glossy coating unique to the molding process, giving it strength and durability.Since no post-processing is required, the continuous pores on the surface of the sponge roller will not be crushed, and the water-draining and water-absorbing functions can be improved. 1) The spiral grooves are integrally formed on the roller through a molding process, and deep spiral grooves are formed on the surface of the flexible sponge roller, improving workability and increasing the effectiveness of mass production.

■The sponge roller has high water removal and water supply functions, which quickly dehydrates the film material and prevents it from getting caught in the sponge roller. Also, the spiral surface of the roller ensures that thin film material is sent out without curling. be able to.

■The film materials placed on the mounting table are piled up in an orderly manner, eliminating the need for sorting work and preventing scratches on the surface of the film materials.

(2) Since the sponge material is extracted from the cylindrical body from which the pipe has been extracted from the center of the sponge material, using the protruding stripes as a guide, the sponge material can be taken out smoothly without damaging the spiral grooves.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view of a state in which a pipe is installed in a female mold, FIG. 2 is a cross-sectional view of a state in which a resin liquid is filled in a female mold, and FIG. Figure 3 is a cross-sectional view with the bottom plate removed from the cylindrical body and the pipe pulled out, Figure 4 is a partially broken front view of the grooved sponge roller, and Figures 5 and 6.
The figures are front views of other grooved sponge rollers, Figure 7 is an explanatory diagram showing the relationship between a pair of rollers and the film material, and Figure 8 is a diagram showing the state immediately before the rollers and the film material come into contact. FIG. 9 is a partially omitted plan view showing a state immediately before the film material is fed into the roller at an angle. Reference Signs List 1-cylindrical body, 2--1 convex stripe, 5--1 concave portion, 6--bottom plate, 7--female mold, 8--vipe, 10--sponge material, 11--through hole, 12-- Spiral groove, 15-pipe, 2
〇Sponge roller with one groove.

Claims (1)

[Claims] A pipe is established in a female mold, which is formed by removably attaching a bottom plate with an engaging part in the center to the bottom of a cylindrical body with a spiral convex part provided on the entire inner surface, and the pipe is installed in the center. The female mold is filled with a resin liquid that forms a sponge material with fine continuous pores when solidified, and after the resin liquid has hardened, the bottom plate is removed and the pipe is pulled out to create a through hole and become flexible. A method for manufacturing a grooved sponge roller, in which a sponge material having a cylindrical body is demolded from a cylindrical body, and a shaft pipe is fixed to a through hole of the sponge material having a spiral groove on the circumferential surface.