JP2001121472A - Method of manufacturing elastic foamed body roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finish an elastic foamed body semifinished product into a cylindri cal shape with high accuracy and efficiency without using grinding wheel polishing and a band knife. SOLUTION: An external shape of an elastic foamed body semiprocessed product 1 is cut into a cylindrical shape by making a long and narrow elastic foamed body semifinished product 1 into which a spindle 2 is inserted in the longitudinal direction adjacent to a wire 3 for cutting in parallel to the spindle 2, moving the wire 3 for cutting at high speed along the shaft line, moving the elastic foamed body semifinished product 1 so that the wire 3 for cutting may come to a position of a desired roller diameter and rotating the semifinished product 1 with the spindle 2 as a center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an elongated elastic foam roller, and particularly to a urethane foam used as a paper supply roller, a developing roller, a toner supply roller and the like in office equipment such as a copying machine and a printer for a personal computer. The present invention relates to a method for producing an elongated elastic foam roller such as a roller.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture a roller made of an elastic foam such as urethane foam, a shaft hole is formed in an axial center of an elastic foam having a prismatic shape, that is, a square cross section, in an axially compressed state. The support shaft is inserted into the shaft hole to return to a state before the compression, and this is finished to a cylindrical outer shape by grinding with a cylindrical grinder or cutting with a band knife or the like.

[0003]

However, grinding with a cylindrical grinding machine is inferior in performance and generates a large amount of fine chips, and therefore has environmental problems. Further, in the cutting process using a band knife or the like, there is no problem such as grinding of a grinding stone, but there is a technical problem to be solved in order to efficiently perform the process while maintaining sufficient accuracy.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a method of finishing a semi-finished product of an elastic foam into a roller having a cylindrical outer shape with high precision and efficiency, without using a grinding wheel or a band knife. It is intended to be.

[0005]

According to the present invention, the above-mentioned problem is solved as follows. (1) An elongated elastic foam semi-finished product having a support shaft inserted in the longitudinal direction is made adjacent to a cutting wire parallel to the support shaft,
The cutting wire is moved at a high speed in its longitudinal direction, and the elastic foam semi-finished product is moved to the side so that the cutting wire comes to a position of a desired roller diameter, and the spindle is , The outer shape of the elastic foam semi-finished product is cut into a cylindrical shape.

(2) In the above item (1), the cutting wire is a fine wire whose surface is coated with fine abrasive grains.

(3) In the above item (2), the fine abrasive grains are fine diamond powder.

(4) In any one of the above items (1) to (3), the cutting wire is an endless wire stretched over two pulleys, and is run at high speed.

(5) In any one of the above (1) to (3), the elastic wire semi-finished product is cut by reciprocating the cutting wire in the axial direction.

(6) In any one of the above items (1) to (5), the elastic foam semi-finished product through which the support shaft is inserted is compressed in the axial direction, and in this compressed state, the outer shape is cut by a cutting wire. To cut.

(7) In any one of the above items (1) to (6), the elastic foam is urethane foam.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the method of the present invention described below, as a processing material, as shown in FIG. 1, an elastic foam semi-finished product (urethane foam having an elongated prismatic shape, that is, a square cross section) is used. Use 1).

The semi-finished elastic foam product (1) is firstly compressed in the axial direction by a conventional method, a shaft hole is formed in the shaft center, and the support shaft (2) is inserted through the shaft hole. After the compression, the compression is released to provide a support shaft (2) as shown in FIG.

The present invention relates to such a semi-finished elastic foam product.
In order to obtain a roller by finishing the outer periphery of (1) into a cylindrical shape, according to the method of the present invention, FIG.
A cutting wire as shown in (3) is used.

The cutting wire (3) is a fine wire whose surface is coated with fine abrasive grains suitable for fine diamond powder. The two ends of the wire are connected to form an endless loop. (4) and (5). The wire diameter of the cutting wire (3) is preferably, for example, 0.1 to 0.6 mm.

The cutting wire (3) is driven by at least one of the pulleys (4) and (5) by a driving device (not shown).
Is rotated at high speed, for example, at a speed of 0.5 to 20 m / sec.

The semi-finished elastic foam product (1) is moved by supporting means (not shown) for supporting the support shaft (2) so that the support shaft (2) is parallel to the support axis of the cutting wire (3). The cutting wire (3) is positioned so as to occupy a desired roller diameter position with respect to the center of the support shaft (2).

Next, the support shaft (2) is rotationally driven at a low speed,
The semi-finished elastic foam product (1) is rotated. By doing so, the cutting wire (3) moving at a high speed allows
The outer periphery of the elastic foam semi-finished product (1) is cut into a cylindrical shape.
(6).

In another embodiment shown in FIG. 2, the elastic foam semi-finished product (1) is kept in a state where it is axially compressed from both ends by two compression plates (7) and (8), and the cutting wire is cut. According to (3), cutting is performed in the same manner as described above.

It is also possible to form a shaft hole for inserting the support shaft (2) in the elastic foam semi-finished product (1) by using the cutting wire (3) as described above. In this case, the elastic foam semi-finished product (1) is cut in a centripetal direction from the side surface of the elastic foam semi-finished product (1) by a cutting wire (3) to form a shaft hole. (3) is detached from the elastic foam semi-finished product (1), and then the cut portion is preferably bonded with an adhesive or the like.

Further, the long cutting wire (3) is tensioned, and both ends thereof are gripped by a gripping device (not shown), and the cutting wire (3) is reciprocated in the axial direction together with the gripping device. Then, the elastic foam semi-finished product may be cut. This reciprocating movement may be minute by an ultrasonic vibration device, or may be a combination of ultrasonic vibration and mechanical reciprocating movement.

[0022]

According to the first aspect of the present invention, since the elastic foam semi-finished product is cut at once with high accuracy in its finished external dimensions, it is efficient and the amount of cutting chips can be reduced. . Further, at the end of cutting, irregularities such as a wire and a complementary blade mark can be prevented from remaining on the outer peripheral surface of the elastic foam semi-finished product.

According to the second aspect of the invention, the cutting can be effectively performed by the unevenness due to the abrasive grains.

According to the third aspect of the invention, it is possible to perform long life and good cutting without wear of the abrasive grains.

According to the fourth aspect of the invention, the cutting wire can be smoothly run at a high speed.

According to the fifth aspect of the present invention, it is possible to reduce the size of the cutting wire driving device as compared with the fourth aspect of the present invention.

According to the sixth aspect of the present invention, since the elastic foam semi-finished product is cut in a state where the density is increased, the cut end becomes sharp.

According to the present invention, an elastic foam roller particularly suitable for a paper supply roller and a toner supply roller of office equipment can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conceptual implementation device schematically illustrating one embodiment of the method of the present invention.

FIG. 2 is a schematic perspective view schematically illustrating another embodiment of the method of the present invention.

FIG. 3 is a perspective view of the finished elastic foam roller.

[Explanation of symbols]

 (1) Semi-finished product of elastic foam (2) Support shaft (3) Cutting wire (4) (5) Pulley (6) Elastic foam roller (7) (8) Compression plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03G 15/00 510 G03G 15/00 510 4F213 15/08 501 15/08 501D 501A // B29K 75:00 B29K 75:00 105: 04 105: 04 B29L 31:32 B29L 31:32 F-term (reference) 2H072 CA01 JB01 JB05 JC02 2H077 AC04 AD06 FA13 FA22 3C058 AA05 AA09 AA16 AB01 AB04 CA01 CB03 DA03 3F049 CA11 LA02 LA07 LB03 3J103 A BA41 EA03 EA08 FA15 FA18 GA02 GA33 GA57 GA58 GA73 HA03 HA12 HA18 HA48 4F213 AH04 WA41 WA54 WA63 WB01 WW24

Claims (7)

[Claims] An elongated elastic foam semi-finished product having a support shaft inserted in a longitudinal direction is adjacent to a cutting wire parallel to the support shaft, and the cutting wire is moved at a high speed in a longitudinal direction thereof; Move the elastic foam semi-finished product to the side,
The elasticity is characterized in that the cutting wire is brought to a position of a desired roller diameter, and the outer shape of the elastic foam semi-finished product is cut into a cylindrical shape by rotating about the support shaft. Manufacturing method of foam roller. 2. The method according to claim 1, wherein the cutting wire is a fine wire whose surface is coated with fine abrasive grains. 3. The method according to claim 2, wherein the fine abrasive grains are fine powder of diamond. 4. The method for producing an elastic foam roller according to claim 1, wherein the cutting wire is an endless wire stretched over two pulleys, and is run at a high speed. 5. The method for producing an elastic foam roller according to claim 1, wherein the elastic foam semi-finished product is cut by reciprocating the cutting wire in the axial direction. 6. The elastic foam according to claim 1, wherein the semi-finished elastic foam product through which the support shaft is inserted is compressed in the axial direction, and in this compressed state, the outer shape is cut by a cutting wire. Manufacturing method of foam roller. 7. The method for producing an elastic foam roller according to claim 1, wherein the elastic foam is urethane foam.