JPS6067098A - Method of cutting rigid polyvinyl chloride material - 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 The present invention relates to a method for cutting polyvinyl chloride material.

Cutting pipes, sheets, etc. made of hard vinyl chloride resin with a saw blade has traditionally been carried out using a saw blade, but the cutting process generates an extremely high amount of noise and also generates dust that becomes cutting debris. Since it floats in the surrounding area, it creates a poor working environment and causes problems such as contamination of products due to the adhesion of the dust. In addition, it causes burrs and chips on the cut dr. surface,
Therefore, finishing machining is required.

5 In order to prevent the above-mentioned cuts and disturbances, there is also a method of pressing a knife into the resin (v!i) and cutting it with a ladle. It is easy to crack or chip, and the load applied to the cutting blade is large, so a blade with high rigidity is required.

Further, since a large force is applied to the cut WF surface, there is a problem that the physical properties of the LX change to white between cuts due to molecular displacement.

This invention solves the above-mentioned problem 18J, and makes it possible to cut the thermoplastic vinyl resin material very quickly and cleanly. The purpose is to provide one method.

In general, 4y! PVC resin has the characteristic of being extremely elastic within the temperature range when heated.
It has the quality of being excellent in restoring its shape.

This invention utilizes the properties of hard vinyl chloride 16W resin to locally heat the part of the hard vinyl chloride material to be cut.
The cutter is pressed to the heated and softened position to perform plastic cutting.

Here, Iil! When heating high quality vinyl chloride material, it is necessary to heat a narrow range as quickly and evenly as possible, and high-frequency dielectric heating or ultrasonic heating can be used for this heating.

The thermal temperature is preferably 65°C to 90°C. If it is below 65°C, the cutting resistance when cutting with a cutter will be large, and the part deformed during cutting will cause permanent deformation, and if it is above 90°C. If this is the case, it becomes difficult to cut, and the dimensional change of the cutter is likely to occur, resulting in a problem that the resin's strength decreases.

Further, as a cutter, a rotary force or a knife may be used, and an appropriate cutter may be used depending on the shape of the material.

In addition, plastic cutting with a cutter refers to pressing the cutter against the cutting material to make the cut difficult.When cutting hard PVC material with the cutter, the cut end deforms in the direction in which the cutter is pressed.This deformed portion is cut-off [
It will be restored to its original state by natural cooling after finishing, and it will be cut 1)l.
The r planes collide with each other.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a cutting device for cutting a polyvinyl chloride resin pipe extruded from a pipe extruder. This cutting device is equipped with a "crawl" that moves the follow-up cart 1 along the extrusion direction of the pipe A.

Pipe A is attached to the following truck 1 from the outside with 4'=i'', I
When a JJ-i type pipe clamp 2 is attached to the pipe and the pipe A is clamped by the vibe clamp 2, the follower cart 1 moves together with the pipe A.

In addition, a string 3 is connected to the rear of the follow-up cart 1, and the string 3 is hung over a pulley 5Q that hangs several times around the corner H1s of the pedestal 4, and a weight 6 is attached to the end of the string 3 that hangs down from the pulley 5. , when the pipe clamp 2 is released, the weight 6
The following truck 1 moves backward due to the fall of the truck.

ll1J 31m subcarriage J4f, 11f This supports the child car 7. This slave truck 7 is capable of moving in the same direction as the follower truck 1, and when the cylinder 8 supported by the follower truck 1 is actuated, it moves by a constant stroke.

A circular heating electrode 9 and a pipe-cutting cutter 10 are provided on the sub-truck 7 at intervals corresponding to the movement stroke of the sub-truck 7.
A clamp block 11.11 is provided for clamping the pipe A from the outside.

The heating electrode 9 is divided into two parts so that it can hold the pipe A from the outside. The cutter 10 moves in a circular direction with the same diameter of the pipe A.
It's happening.

Now, when the tip of the pipe A manufactured by the extruder moves one time to the position where the terminal detection switch SW is activated, the bi-hoo clamp 2 is activated by the detection signal from the switch SW and clamps the pipe A. . As a result, the follower cart 1 moves along with the pipe A. tf Heating almost at the same time as the pipe clamp 2 clamps the pipe A: E pocket 9 clamps the pipe A and heats the local part.

When the heating electrode 9 & heating reaches 65°C to 90°C,
The heating electrode 9 releases the clamping of the pipe A in response to the time-up signal indicating the completion of heating, and then the clamp 8 is activated and the child carriage 7 is
'Constant stroke'! ; IjlJ brings luck. When the cutter 10 is located at the curing position of the pipe A, the clamp block 11 clamps the pipe A. Then, the cutter 10 moves toward the center of the pipe A to cut into the pinot A (see FIG. 2), and further rotates inward to cut the pipe A.

After cutting is completed, the cutter 10 returns to the position shown by the chain line in FIG. 4, and the clamp block 11 also returns to the position where the via A is released from its grip. 1) Pipe clamp 2 also clamps pipe A and removes 1g. 1) Repeat until the γ position. Therefore, the following table J1! , 1 are temporarily returned to the position shown in FIG. 1, and after stopping, the cylinder 8 is operated to return the slave unit 7 to serve as a reference for the next cutting.

By the way, when the cutter 10 cuts the pipe A, the cut end of the pipe A deforms in the same direction as shown in FIG. After cutting is completed, the cutter 9 is separated from the pipe A and allowed to cool naturally. Q: The original state is different, and the cut ends collide with each other.

In the case of the embodiment, cutting of a hard thermoplastic vinyl resin pipe is explained as an example, but the cut lvr material is not limited to a pipe, and may be a sort-like material, for example.

As described in 2 below, this invention uses a cutter to locally heat a hard vinyl chloride material and plastically cut the heated and softened position using a cutter. It can be cut into
When cutting, the hair part that is cut Q is restored to its shape by cooling and hardening after cutting, resulting in a very clean cut surface with no dimensional changes and no burrs or whitening. .

First, since plastic cutting is used, there is no generation of dust or dirt around the fruit or noise, and a good confectionery making environment can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a hemostasis diagram schematically showing a pipe cutting device implementing the method according to the present invention, Fig. 2 is a partially cutaway front view showing the operating state of the same, and Fig. 3 shows the heating electrode and the same as the above. Figure 4 is a vertical cross-sectional side view showing the cutting state of the pipe by the cutter and the cutter. It is a political front view showing the state after pipe cutting is completed. A... Pipe, 10... Cutter

Claims (1)

[Scope of Claims] 1. Locally cut the part of the hard vinyl chloride material
A method for cutting a hard vinyl chloride material, which comprises heating it to soften it, and then plastically cutting it by attaching a cutter to the softened position. 2. The method for cutting a hard vinyl chloride material according to claim 1811, characterized in that the heating temperature is 65°C to 90°C.