JPS5914153Y2 - Rotary blade for cutting synthetic resin - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotary blade for cutting synthetic resin products such as synthetic resin pipes.

Conventionally, circular saws are often used to cut synthetic resin products such as hard vinyl chloride pipes, but they generate a large amount of chips.

For this reason, the inventor of this invention attempted to cut synthetic resin products such as synthetic resin pipes by making the outer peripheral edge of the rotary blade into a knife-like blade instead of a saw blade, and rotating it at high speed. We succeeded in minimizing the amount of powder produced.

However, this was not always sufficient as warped debris like flakes sometimes adhered to the cut surface.

This invention was made in view of the above points, and its gist is that a disc-shaped body has an axial hole in the center, and the outer periphery is sharpened, and there is a space between the axial hole and the outer periphery. The rotary blade for cutting synthetic resin is provided with a through hole and has an outwardly raised corner at the periphery of the through hole.

Next, this invention will be explained with reference to embodiments shown in the drawings.

Reference numeral 1 denotes a disc-shaped body, in which a mounting shaft hole 2 is bored in the center thereof, and a cutting edge 3 whose outer peripheral edge is sharpened.

Through holes 4, 4, . . . are bored at appropriate intervals between the cutting edge 3 of the disc-shaped body 1 and the mounting shaft hole 2.

The size, spacing, etc. of the through holes 4, 4, etc. are determined as appropriate.
It does not have to be a round hole, but may be an elongated hole.

Further, the corner portion 41 of the through hole 4 is angular.

This is because the corner 41 of the through hole 4 comes into contact with the cut surface of the synthetic resin product, making it easy to cut away warped debris. Applying hard chrome plating 5 not only increases the overall hardness and extends the life of the product. The corner portion 41 of the through hole 4 becomes even more angular due to the swelling phenomenon, forming an edge-like blade.

The rotary blade for cutting synthetic resin of this invention uses a knife-like blade instead of the conventional saw-like cutting edge, so when it rotates at high speed and comes into contact with the synthetic resin product, the resin heats up and cuts as if it melts. As a result, the generation of chips is extremely low compared to when using a saw blade, and since the corner of the hole touches the cut surface and finishes, there is no adhesion of warped debris and the cut surface is beautiful. disconnected.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of this invention, and FIG. 2 is a sectional view taken along line II--II in FIG. 2...Shaft hole, 3...Blade tip, 4...
...Through hole.

Claims (1)

[Scope of utility model registration request] The disc-shaped main body has a shaft hole in the center, the outer peripheral edge is sharpened, and a through hole is provided between the shaft hole and the outer peripheral edge, and the peripheral edge of the through hole has a slight bulge outward. A rotating blade for cutting synthetic resin with an upward angle.