JPS618300A - Method of cutting cylindrical body made of plastic - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cutting method that can continuously cut a cylindrical body of a plastic ring with a clean cutting edge.

(Prior Art) As a method of cutting plastic cylindrical bodies having various cross-sectional shapes to a fixed length, a method of cutting while moving has been conventionally practiced and is common.

(Problems to be Solved by the Invention) In the above conventional method, so-called chips and fuzz are easily generated due to friction between the blade surface of the circular saw or flat blade and the cylindrical body, and medical equipment with strict quality requirements. The problem with the cylindrical body used in such applications is that it requires an extra step of blowing air or washing the cut surface to remove chips, fuzz, etc.

(Means for Solving the Problems) The present invention has discovered a method capable of solving the above problems, and its gist is that a plastic cylindrical body is coated with lubricating oil 3. A method for cutting a plastic cylindrical body is characterized in that it is cut into a constant length using a cutting blade.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a perspective view showing an example of a device used in the present invention. To explain the structure of this apparatus based on its operation, first, a cylindrical body having a substantially rectangular cross-sectional shape is formed by a profile extrusion method or a sheet folding method (not shown). Among the above forming methods, the sheet bending method has the advantage of being able to achieve thinner walls and faster forming speeds.
Cylindrical bodies with various cross-sectional shapes can be easily obtained by combining the cores) and the conveyor belt 2.

The above-mentioned molded cylindrical body is moved by a take-up roll or the like at a constant take-up speed. The taking speed and length of this moving cylindrical body are detected by measuring rolls, etc., and the cutting unit! The electric signal is transmitted to the motor M2 for moving the motor M2 and the motor M1 for driving the cutting blade as an electric signal.

Cutting unit! is repeatedly moved in the L direction on the moving shaft 6 by the motor in synchronization with the take-up speed of the cylindrical body. That is, the motor M2 is driven and controlled by the signal from the driving motor of the measuring roll + s fm conveyor belt 2. The moving means can be a combination of a rack and pinion or a cam and lever.

The above cutting unit! Basically, the cutting blade 2 is connected to a drive motor M and has a controllable rotation speed, a tank, a lubricating oil 3 housed in the tank, and a heating heater. The cutting blade uses lubricating oil 3 stored in the tank at the bottom.
The surface is coated with lubricating oil by passing through the inside, and then heated to a predetermined temperature by the heater at the top, and then the cutting unit! The cylindrical body is cut at a predetermined position while moving itself. Heating has the effect of reducing the viscosity of lubricating oil appropriately when it is viscous, or evaporating the water when diluting lubricating oil with water, etc., so heating the cutting blade to an appropriate temperature will make it even more effective. Sharpness improves.

The heating temperature varies depending on the lubricating oil used, but is usually θ.
~! It is about θ°C.

As for the ingredients of lubricating oil 3, it can be used as long as it is a lubricating liquid, but a mixture of silicone oil and water at a certain concentration (silicon/water = //!~) is heat-resistant. Preferable in terms of performance and ease of handling ◎ Also, in order to coat the cutting blade with lubricating oil, a method of spraying lubricating oil onto the blade surface may be used. The presence of lubricating oil keeps the cut edge made by the cutting blade sharp and prevents the generation of chips and fuzz.

As the above-mentioned motors M1 and M2, it is preferable to use servo motors whose speeds can be easily controlled.In particular, the servo motor M2 drives a cam, and the lever connected to the cam drives the cutting unit. It is preferable to run the cylindrical body in synchronization with the speed of the cylindrical body.

As for motor M, a stepping motor can also be used. Furthermore, for the cutting operation of the motor M and the cutting blade, a mechanism is installed in which rotational force is applied until the cylindrical body is cut by a few millimeters, and then the cutting blade is moved linearly and the blade is pushed or pulled to completely cut. It can be crowded.

- No. - (Effects of the Invention) As described above, the method of the present invention can prevent the generation of chips and fuzz that would occur with conventional cutting methods even when cutting at high speed, and can also reduce the production speed of cylindrical bodies. It has the advantage of being able to increase

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a device used in the present invention. /...Plastic cylindrical body...Cutting blade 3...Lubricating oil

Claims (3)

[Claims] (1) A method for cutting a plastic cylindrical body, which comprises cutting the plastic cylindrical body (1) into a predetermined length using a cutting blade (2) coated with lubricating oil (3). (2) The cutting method according to claim 1, characterized in that the cutting blade (2) is heated. (3) The cutting method according to claim 1 or 2, characterized in that the moving plastic cylindrical body (1) is cut while moving the cutting blade (2) in synchronization with the moving plastic cylindrical body (1). .