JPH06200924A - Suction roll and its manufacture - Google Patents

Abstract

PURPOSE:To facilitate the manufacturing of a suction roll and facilitate the dimensional change in the longitudinal direction by manufacturing the major parts of the suction roll through the combination of molded products made of synthetic resin. CONSTITUTION:A cylindrical part of a suction roll is constituted by uniting a plurality of cylindrical elements 1 where a plurality of grooves 3 are provided at least on one side of the section in the radial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a suction roll in which a large number of small holes are formed in the outer peripheral surface of a hollow roll and suction is applied from the inside. It is what is done.

[0002]

2. Description of the Related Art As shown in FIG. 4, the conventional cylindrical portion of a suction roll has a cylinder 11 with a large number of small holes 12 formed therein.
Bearings (not shown) are attached to both ends of the rotary cylinder to be formed in the next process to form a rotary cylinder. Further, when forming a large-diameter cylindrical body, it is formed by rolling a plate material.

[0003]

In the conventional suction roll, the small hole in the cylindrical portion is formed by the secondary processing, which causes a high cost. Fixing to the machine tool, positioning of the circumferential surface, deburring, etc. are time-consuming and cause high costs. Also, in the conventional method, the dimension in the longitudinal direction had to be determined first, and it was not possible to change the dimension during manufacturing. When the diameter of the cylinder was large and the length of the cylinder was long, it was not possible to set it on the secondary processing machine for drilling and had to resort to special processing. When the cylindrical body is rotated at a high speed around the axis, the centrifugal force causes a difference in the diameter between the both ends in the axial direction and the vicinity of the center, which is inconvenient for the purpose of ensuring the diameter accuracy.

[0004]

According to the present invention, a cylindrical portion of a suction roll is constructed by stacking parts made by molding of synthetic resin or casting such as die casting, thereby making a hole for machining. In addition to eliminating it, the longitudinal direction can be changed and the purpose of maintaining the diameter at high speed rotation has been achieved.

[0005]

1 is a perspective view showing a cylindrical element of a suction roller according to an embodiment of the present invention. The cylindrical component 1 is made of synthetic resin and formed into a substantially cylindrical shape. Center 2
A hole 3 is provided in the shaft for inserting the shaft. The outer peripheral portion 4 is provided with a plurality of grooves 5, and the central portion 2 and the outer peripheral portion 4 are provided.
The ribs 6 are integrated with each other, and the portions other than the ribs 6 are through holes in the same direction as the holes 3. Further, a step 7 is provided on the outer peripheral portion 4, and a step (not shown) is provided on the other end so as to fit with the step 7. 2 is a suction roll assembled using FIG. 1 as a main component. As shown in the sectional view of FIG. 2, a hollow shaft 8 is inserted and fixed at both ends with flange-shaped members 9 and 10. In this embodiment, suction is performed by the small groove provided in the hollow shaft 8 through the groove 5 of the component. This embodiment is an example in which the hollow shaft is entirely fitted and inserted, but by combining it at the step 7 of the outer peripheral portion 4, the same as the conventional cylinder 11 can be manufactured.

[0006]

As described above, since the main part of the suction roll of the present invention is formed by molding synthetic resin and the secondary processing for drilling is not required, mass productivity is excellent and cost reduction is possible. Also, because the main parts are connected together, there is an advantage that it is easy to handle when making models with different widths. By forming a cylindrical body (especially one having a large diameter and a long length) by an independent assembly of cylindrical elements, it is possible to reduce the diameter change at each axial position during high-speed rotation.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a main part of a suction roll of the present invention.

FIG. 2 is an external view of an example of a suction roll of the present invention.

FIG. 3 is a sectional view of an example of a suction roll of the present invention.

FIG. 4 is an external view of a main part of a conventional suction roll.

[Explanation of symbols]

 1. Cylindrical element 4. Outer periphery 5. groove

Claims (2)

[Claims] 1. A suction roll characterized in that a cylindrical body and a suction hole are formed by axially uniting a plurality of cylindrical elements having a plurality of grooves on at least one of the radial cut surfaces. 2. A method for manufacturing a suction roll, characterized in that a plurality of cylindrical elements are united in the axial direction to form a rotary cylinder and a suction hole at the same time.