JP2552646Y2 - Deburring device for rubber moldings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing burrs protruding from the outer periphery of a rubber molded product during molding of the molded product.

[0002]

2. Description of the Related Art As shown in FIGS. 3 (a) and 3 (b), when a molded body 3 having a concave portion 2 in a rubber plate 1 is molded as shown in FIGS. Since more rubber material is used than necessary, excess rubber material protrudes from the outer periphery 4 of the molded body 3 as burrs 5. This burr 5 can be removed by hand or scissors,
A method such as cutting with a knife such as a knife or placing the molded body 3 in a separately prepared jig or the like, pressing the burr 5 and punching out the molded body 3 has been employed.

[0003]

[Problem to be solved by the invention]
It takes time to remove burrs manually for each piece, and it is not possible to remove burrs cleanly with a molded article having a complicated shape, resulting in problems in mass production and quality. In the case of compacts with a simple shape such as a circle or a rectangle, a method is generally used in which a compact is pressed out by pressing burrs, but this method causes damage to the compact and a complicated punching structure. However, there is a disadvantage that it takes time to switch to a molded article of another shape.

[0004]

SUMMARY OF THE INVENTION The apparatus of the present invention solves the above-mentioned conventional problems and removes burrs neatly without damaging even a molded article having a complicated shape, and an inner burr inside the molded article. This is a deburring device that can remove even very thin burrs, for example, with a thickness of 0.1 mm or less, or even small burrs formed in the outer peripheral recesses. In a device for removing burrs protruding around a molded body, a lower mold having an outer periphery conforming to the outer peripheral shape of the molded body, a lower mold on which the molded body is placed, and being fitted to the lower mold, the outer periphery is a deburring blade. The gist of the present invention is to provide a deburring device for a rubber molded body, comprising an upper die to be formed, and a plane passing through the cutting edge of the deburring blade is inclined with respect to a horizontal plane.

Hereinafter, the present invention will be described with reference to the drawings. FIG.
As shown in (a), the compact 3 is placed on the lower mold 6 with the concave portion 2 side of the compact facing up. Since the outer periphery of the lower mold 6 matches the outer periphery 4 of the molded body 3, the burr 5 is
Protrudes outside the outer periphery of the. The upper mold 7 has an inverted dish shape to be fitted to the lower mold 6, and the edge is a deburring blade 8. Moreover, since the plane passing through the cutting edge of the deburring blade 8 is inclined at an inclination angle θ with respect to the horizontal plane, when the upper mold 7 is lowered to cut the burr 5, the entire surface of the deburring blade 8 is simultaneously formed with the burr 5. Instead of cutting the burrs, the burrs 5 are cut sequentially from the lowermost part of the deburring blade 8, so that the upper mold 7 can be easily deburred without requiring a downward force. In FIG. 1A, reference numeral 9 denotes a fixing plate for fixing the upper mold 7.

The tilt angle θ exaggeratedly shown in FIG. 1A is not particularly limited as long as it can be deburred, but is in the range of 3 to 10 degrees, preferably 4 to 6 degrees depending on the hardness of the rubber. If the inclination angle θ is too large, the stroke of the upper mold 7 becomes long and the device becomes excessively large. If the inclination angle θ is too small, a large pressing force is required at the time of deburring, and the driving cylinder becomes excessively large. Also above,
In order to smooth the fitting of the lower mold and to remove burrs neatly, the fitting clearance g (shown exaggerated in FIG. 1A) is not particularly limited as long as the burrs can be removed. 0.5 mm, preferably 0.2 to 0.3 mm. As a material of the deburring blade, a known material such as a general structural rolled steel material or hard aluminum is used.

FIG. 1 shows an example of the mounting structure of the upper and lower dies 7 and 6.
(b) and (c). The upper die 7 is fixed to a fixed platen 9, is driven downward by a drive cylinder 10 to remove burrs, and is stopped by a bottom dead center stopper 11. Guide shaft 1
Numeral 2 is for guiding the upper mold 7 to smoothly descend vertically and to fit the lower mold 6 correctly. Lower mold 6
Is fixed to the fixed platen 13. Upper and lower die fixing plates 9, 1
3 can be attached by one-touch lock pin or
It is preferable to make it simple to use a pin fixing method or the like so as to reduce the time required for exchanging the mold when changing the molded product.

[0008]

FIGS. 2 (a), 2 (b), 2 (c) and 2 (d) show a deburring process by the apparatus of the present invention. The inner burr blade 14 has the same shape as the inner burr so that when the upper mold is lowered, the inner burr in the formed body 3 can be removed by avoiding the concave portion 2 of the formed body until the lowermost point is reached. I have. First, as shown in FIG. 2 (a), the molded body 3 is placed on the lower mold 6. At this time, the molded body 3 is placed at a predetermined position of the lower mold 6 so as not to float or bend. Place. Then, a drive switch (not shown) is turned on, and the upper die 7 attached to the fixed platen 9 is driven by the drive cylinder 10.
To descend. When the upper mold 7 starts to descend, FIG.
As shown in (b), the lower end portion of the deburring blade 8 comes into contact with the outer periphery 4 of the molded body 3 and starts cutting the burr 5.

The upper die 7 is provided with a bottom dead center stopper 11 (FIG. 1).
(See FIG. 2B), and the burrs 5 of the molded body 3 are
Cut out as shown in (c) and (d). When the upper die 7 is lowered and stopped by the bottom dead center stopper 11, it is raised to the original position by the drive cylinder 10. Thereafter, by repeating this series of operations, deburring can be performed efficiently without damaging the molded body.

[0010]

EXAMPLE The upper and lower dies were made of hard aluminum including the deburring blade, the fitting clearance g was 0.25 mm, and the inclination angle θ of the upper dies was 0.5 degrees. The drive cylinder 10 used had a diameter of 63 mm, a stroke of 400 mm, and a core pressure of 5 kg / cm ² . With the deburring apparatus of the present invention, a total of 330 mm × 190 m, which is a series of eight burrs formed of a 60 mm square silicone rubber having a rubber hardness of 60 ° H and an outer circumference of 60 mm.
180 hours per hour (1,440 compacts) could be deburred, and there was no problem in quality.
On the other hand, in the conventional punching method, it took 16 hours to deburr 180 compacts, and as many as 40 compacts were damaged.

[0011]

[Effects of the Invention] The deburring device of the present invention requires only a small output of the drive cylinder, so that it can be miniaturized. Deburring was possible, the work efficiency was high, and the efficiency was improved eight times as compared with the conventional manual operation. In addition, since the upper and lower dies can be replaced with a single touch, the preparation time can be reduced, and even when deburring a large number of types and small lots of compacts, one deburring device can be used to reduce product costs and save labor. Can have a remarkable effect.

[Brief description of the drawings]

1 (a) is a conceptual explanatory view of an upper and lower mold mounting structure of the device of the present invention, (b) is a front view of an upper and lower mold mounting structure,
(c) is a side view.

FIGS. 2 (a), (b), (c) and (d) are explanatory views of a deburring step by the apparatus of the present invention.

FIG. 3A is a plan view of a molded rubber article having burrs, and FIG. 3B is a longitudinal sectional view taken along line XX of FIG. 3A.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rubber plate 8 ... Deburring blade 2 ... Recess 9 ... Fixing plate 3 ... Molded body 10 ... Drive cylinder 4 ... Outer periphery 11 ... Bottom dead center stopper 5 ... Burr 12 ... Guide shaft 6 ... Lower die 13 ... Fixing plate 7 ... Upper die 14 ... Inner deburring blade θ ... Inclination angle g ... Fitting clearance

Claims (1)

(57) [Scope of request for utility model registration] 1. An apparatus for removing burrs protruding around a molded article during rubber molding, wherein the lower mold has an outer periphery conforming to the outer peripheral shape of the molded article, and is fitted with the lower mold for mounting the molded article. A deburring device for a rubber molded body, characterized in that the outer periphery has an upper mold forming a deburring blade, and a plane passing through the cutting edge of the deburring blade is inclined with respect to a horizontal plane.