JPS6117633B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic abrasive supply device, and more particularly to a device that automatically supplies abrasive grains to polish a mold.

Conventionally, molds, especially molds with concave curved surfaces, are polished by mechanically rotating an elastic tool such as a rubber grindstone using abrasive grains contained in the tool itself. Even if an attempt is made to polish the surface of the mold, there is a limit due to the small amount of abrasive grains contained in the tool. For this purpose, as shown in FIGS. 1 and 2, a mixture of abrasive grains 5 and oil is manually applied to the polished surface of the mold 1, and then the tool 2 is rotated in the direction of the arrow 3. While polishing, move it in the four directions of the arrow. However, with this method,
As the tool 2 moves on the polished surface of the mold 1, some of the abrasive grains 5 are blown off by the tool 2, resulting in a decrease in the amount of abrasive grains interposed between the tool 2 and the polished surface, and the amount of polishing is reduced. do. Therefore, in order to improve the problem that the amount of abrasive grains decreases, as shown in FIG. There is one that uses grain 5 for polishing. This increases the amount of abrasive grains 5, but since the abrasive grains 5 are placed in the entire concave part 6 of the mold 1, a large amount of abrasive grains 5 must be supplied, and if the concave part 6 of the mold 1 is large. This method requires a large amount of supplied abrasive grains, which is not economical, and also has the problem that most of the supplied abrasive grains 5 do not participate in polishing. Furthermore, if the polished surface of the mold is a convex portion, it is necessary to provide a weir in advance to prevent the abrasive grains from flowing out.

In view of the problems of the prior art described above, the present invention attempts to automatically polish a mold by automatically supplying a necessary amount of abrasive grains to the polishing surface of the mold. To this end, the present invention provides a nozzle for supplying abrasive particles close to the front of the tool, and a guide for guiding the nozzle further in front of the nozzle, so that the nozzle and the guide are integrated around the tool. It is rotatable and the guide is always in contact with the polished surface of the mold.

Next, the structure of the present invention will be described with reference to an embodiment shown in FIGS. 4 and 5.

The polishing tool 2 is made of rubber or the like, and is configured such that its mounting shaft 10 is held in a tool holder 9 and rotated in a certain direction shown by an arrow 3 at a predetermined number of rotations. A fixed shaft 15 is attached to the outer periphery of the tool holder 9 at an appropriate distance from the tool holder 9, and a rotating holder 13 is attached around the fixed shaft 15 with a bearing 14 interposed therebetween. A support 12 is attached to a portion of the rotary holder 13 located in front of the tool 2 in the feeding direction 4, and a nozzle 7 for supplying abrasive grains 5 that is continuously and automatically fed from a pump or the like is attached to the support 12.
is attached close to the front of the tool 2, and a shaft 11 is also attached in front of the nozzle 7, and a shaft 11 is attached to the lower end of the shaft 11 so as not to damage the mold surface that slides on the concave polished surface 16 of the mold 1. Attach a guide 8 for guiding the nozzle 7 made of a material such as rubber.

Since the present invention is configured as shown in the above embodiment, when polishing the concave polished surface 16 of the mold 1, the guide 8 is slid along the polished surface 16. , the rotating tool 2 is applied to the polishing surface 16 while automatically supplying the necessary amount of abrasive grains 5 from the nozzle 7.
Let it slide against the surface. At this time, the guide 8 attaches the shaft 1 to a support 12 attached to a portion of the rotary holder 13 on the front side of the tool 2.
Since the rotating holder 13 is attached to the front of the nozzle 7 via the bearing 14, even if the polished surface 16 of the mold 1 is curved, the rotating holder 13 is attached to the fixed shaft 15 via the bearing 14.
By appropriately rotating the surrounding area, the nozzle 7 can be constantly slid along the curved surface to guide the nozzle 7. In addition, as mentioned above, the nozzle 7 is installed close to the front of the tool 2 and automatically supplies the abrasive grains 5 immediately before the tool 2, so that the minimum amount of abrasive grains 5 required can be supplied. Polished surface 16 efficiently with tool 2
It can be polished sufficiently.

6 and 7 show another embodiment of the present invention suitable for polishing the corner 18 of the side wall of the convex polishing surface 17 of the mold 1. FIG. In this embodiment, a guide groove ring 19 is attached to the outer periphery of the rotary holder 13 shown in the previous embodiment, a wire 20 is wound around the guide groove ring 19, and a fixed shaft 15 is attached to the upper fixed shaft 15.
A holder 21 is attached to the holder 21, a roller 22 is attached to the holder 21, and a weight 2 is attached to the tip of the wire 20 via the roller 22 so that the guide 8 can always come into contact with the polished surface 17 even when turning around the corner 18.
3 is suspended. Therefore, in this embodiment, when the guide 8 rotates around the corner 18 of the mold 1, the polished surface 17 of the corner 18 is always
In other words, the rotating holder 13
If the rotating holder 13 is rotated in advance to determine the position of the weight 23 so that the guide 8 can rotate along the corner 18, the guide 8 will always be in contact with the polishing surface 17 even at the corner 18 due to the action of the weight 23. , and since the nozzle 7 does not separate, it can be polished with the tool 2 in the same way as in the previous embodiment.

As described above, in the present invention, the abrasive grain supply nozzle always corresponds to the polished surface by the nozzle guide regardless of whether the polished surface of the mold has concave or convex parts, and the abrasive grains are automatically applied to the front surface of the tool. , it is possible to automate the polishing work of molds, which has the effect of improving polishing work efficiency. Therefore, there is no need to manually supply abrasive grains to the polished surface of the mold as in the past, and if the polished surface is a recess, there is no need to fill the recess with abrasive grains. Abrasive grains can be saved.

[Brief explanation of the drawing]

Figure 1 is a schematic plan view showing the state when polishing the concave part of a mold with a conventional polishing tool, Figure 2 is an enlarged sectional view taken along the line A-A in Figure 1, and Figure 3 is the inside of the concave part of the mold. FIG. 4 is a partially cutaway longitudinal cross-sectional view showing another conventional example of polishing by filling the mold with abrasive grains; FIG. FIG. 5 is an enlarged sectional view taken along the line A--A in FIG. The figure is number 6
It is an enlarged sectional view taken along the line A-A in the figure. 1... Mold, 2... Polishing tool, 5... Abrasive grains,
7... Abrasive grain supply nozzle, 8... Nozzle guide, 9... Tool holder, 12... Support,
13... Rotating holder, 14... Bearing, 1
5... Fixed shaft, 16, 17... Polished surface, 19...
Guide groove ring, 20... wire, 23... weight.

Claims (1)

[Scope of Claims] 1. A polishing tool that is rotatably attached via a bearing to the outer periphery of a fixed shaft provided around the rotation axis of a polishing tool that rotates and slides on the polishing surface of a mold. Automatic supply of abrasive grains, characterized in that an automatic abrasive grain supply nozzle and a guide for guiding the nozzle are provided in a rotary holder such that the nozzle is disposed between the rotation shaft and the guide. Device. 2. A patent claim characterized in that a wire is wound around the outer periphery of the rotary holder, and a weight is attached to the tip of the wire so that the rotary holder can always rotate in correspondence with the polished surface of the mold. The automatic abrasive supply device according to scope 1.