JPS5898233A - Removal of burrs from rubber-like elastic object - Google Patents

Abstract

PURPOSE:To make the cutting surface of a circularly formed product uniform throughout its circumference by an arrangement wherein the burr of the formed product is formed into a hollow conically shaped membrane slanted from the inner end of the formed product toward its axial center and a blade is moved in the direction of diameter between the circular product and the burr. CONSTITUTION:In forming a circular formed product 1 of rubber-like elastic substance, a burr 2 composed of a substantially hollow and conically shaped membrane 8 slanted from the internal surface end of one end of the circular formed product 1 and a substantially columnar body 4 protruded from the axial center of the membrane is caused to form. The circular formed product 1 having the burr 2 to be removed is installed to a holder 5 which is then rotated at a speed necessary for cutting. The tip of blade 7 is positioned on the extension line of the cut portion of the circular formed product 1, and then the blade 7 is caused to advance to cut the burr by the rotation of the holder 5. In this method, the initial posture of the blade is maintained until the burr is completely removed and the cutting surface is uniformly cut throughout its entire circumference.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing pars from a rubber-like elastic body.
In more detail, the purpose is to propose a method with excellent cutting performance for manufacturing toric bodies of rubber-like elastic bodies with good cutting surface conditions. As shown in Fig. 1, the conventional technique for removing the paris is to place the pars (2) to be removed from the annular molded product (1) between the disk-shaped membrane (3) and its axial center. The annular molded product (1) is adhered to a holder (5) of a cylindrical body, such as a full-length cylindrical body, which is composed of a substantially cylindrical body (4) positioned and rotated by a rotation mechanism, and the inner peripheral end (6 ) The cutting was performed using a blade (7) that moves forward and backward toward the target. However, the problem with this method is that just before the cutting of the paris (2) is completed, that is, at the time of the final cutting rotation, the paris (2) in the separated part sag due to its own weight, and furthermore, it comes off due to the action of centrifugal force. The part that is shaken out in the radial direction and is still connected to the base material comes to be drawn toward the axis. As a result, since the cutting position of the blade (7) does not change in the part connected to the base material, the cutting position is changed so that the part connected to the base material is cut in the annular molded part (1) drawn toward the axis. A concave cut portion is formed on a part of the surface, which makes it difficult to make the product uniform and, at the same time, poses a fatal problem in the case of products such as oil seals.

In view of the above-mentioned problems, the present invention was made for the purpose of eliminating the concave cutting part in deburring work, and by changing the shape of the deburr to be removed from a disk-like film to a substantially hollow conical film, cutting This suppresses the drawing of the end of the liquid toward the axis of the base material and shapes the shape of the final cut surface.

Hereinafter, the method for removing burrs from a rubber-like elastic body according to the present invention will be explained in more detail with reference to FIG.
1) a substantially hollow cone-shaped membrane (8) tilting in a narrow direction from the inner peripheral end of one end; and a substantially cylindrical body (4) protruding from the axis of the hollow cone-shaped membrane (8); Form a tangled Paris (2).

(b) Hold the outer periphery or circumferential portion of the annular molded product (1) using the holder (5) of the cylindrical body so that the axis is oriented vertically and the rotation axes are aligned. The holder (5) is rotated at an appropriate speed by a rotational drive mechanism (not shown).

(c) The blade (7) is supported and held so that it can move forward and backward, mainly from the axis side toward the inner corner (6') of the annular molded product (1) and the paris (2) to be cut, and the forward and backward drive mechanism ( (not shown)) (d) First, with the annular molded product (1) having the paris (2) to be removed attached to the holder (5), The holder (5) is rotated at the speed required for cutting.

(e) After positioning the cutting edge of the cutter (7) on the extension line of the cutting part of the annular molded product (1), the cutter (7) is advanced and cut in conjunction with the rotation of the holder (5). O By the above cutting, the burr (2) is removed from the annular molded product (1), but in this case, the burr (2) is attached to the hollow cone membrane (
8) and a substantially cylindrical body (4), the holder (5)
A relatively large gyro effect accompanying the rotation of the Paris (
2), and even if part of the pari (2) is removed, the pari (
2) The rotating shaft of the part becomes difficult to tilt, and therefore, it is not blown away in the radial direction and is separated and falls downward while rotating.As a result, the annular molded product (1) and The angle of the corner of 2) with respect to the cutter (7) is kept constant until the end of cutting, so that the cut surface is uniform. Although the hollow conical membrane (8) had a shape that protruded downward from the center, the same effect could be obtained even if the hollow conical membrane (8) was formed into a shape that protruded above the center. Paris (2)
) In some cases, a suction device is required to remove the .
Due to the large gyroscopic effect caused by shaft rotation, the initial posture is maintained until the burr is completely removed, so the cutting surface becomes uniform over the entire circumference. Furthermore, according to the method of the present invention, the separated particles do not scatter in the radial direction, so that the labor of collecting the particles can be saved. There is something very big0

[Brief explanation of drawings]

The drawings are schematic diagrams showing the method of removing pars from a rubber-like elastic body according to the present invention, FIG. 1 is an explanatory diagram showing a conventional method, and FIG. 2 is an explanatory diagram showing an embodiment of the method of the present invention. be. (1) Annular molded product (2) Paris (3) Disc-shaped molded product (4
) Approximately cylindrical body (5) Holding A (6) Inner peripheral end (
6') Inner corner (7) Cutting tool (8) Hollow cone Figure 1 Figure 2

Claims (1)

[Claims] The annular body formed from a rubber-like elastic body is formed into a hollow conical membrane that is tilted in the axial direction from the inner end of the cylindrical body, and the annular body is moved at a predetermined circumferential speed by a drive device. When the rotation axis and axis of the holder are vertical to the rotating holder, the blade is moved radially between the annular body and the holder, and the cutter is cut in conjunction with the rotation of the holder. A method of removing paris from a rubber-like elastic body.