JPH1099653A - Cutting apparatus and cutting method for resin-fixed part of hollow yarn membrane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the smoothness of a cut cross-section face and make chip powder of resin difficult to enter the inside of a hollow yarn membrane by cutting a resin-fixed part of a hollow yarn membrane with a rotary blade for rough cutting and then further cutting the end face by a rotary blade for finishing. SOLUTION: A motor 1a for rotating a rotary blade for rough cutting and a motor 1b for rotating a rotary blade for finishing are started rotating at previously set rotation speeds. A uniaxial stage 10 is moved in the left direction and a cut part of a cylindrical case 5 is moved to the position immediate under a rotary blade 2a for rough cutting. After that, a uniaxial stage 3a which moves the rotary blade 2a for rough cutting in upand-down directions moves downward and the resin-fixed part of a hollow yarn membrane in the cylindrical case is roughly cut by the rotary blade 2a for rough cutting. Next, the uniaxial stage 3a moves upward and the rotary blade 2a for rough cutting is turned back to the original position and at the same time a uniaxial stage 3b to move the rotary blade 2b for finishing in the up-and-down directions moves downward and the cut end face of the resin-fixed part of the hollow yarn membrane in the cylindrical case 5 is further cut by the rotary blade 2b for finishing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hollow fiber membrane resin fixing portion of a cylindrical case in which a plurality of bundled hollow fiber membrane bundles are fixed with resin at one end inside the cylindrical case. The present invention relates to a cutting device and a cutting method for a hollow fiber membrane resin fixing portion, which cuts an open state at its cut end face.

[0002]

2. Description of the Related Art In recent years, hollow fiber membrane modules using hollow fiber membranes have been used in many fields such as medical applications, water purifiers, water purifiers, and gas separation. Examples of such a hollow fiber membrane module include a hollow fiber membrane in which both ends of the hollow fiber membrane are separately fixed in a resin in a cylindrical case to be in an open state, or a hollow fiber membrane is bundled in a U-shape, and the end portion is formed. A resin is fixed in a cylindrical case to be in an open state, or one end of a hollow fiber membrane is sealed,
It is common that the other end is fixed with a resin to be in an open state. In order to form the hollow fiber membrane into the above-mentioned module form, after filling the hollow fiber membrane bundle into the cylindrical case, injecting and solidifying a liquid fixing resin, the hollow fiber membrane resin in the cylindrical case is formed. A method of cutting the fixed portion with a guillotine cutter has been used.

[0003]

However, in the above-described cutting method, for example, the resin fixing portion of the hollow fiber membrane filled in a cylindrical case whose outer diameter is increased in order to increase the filtering and separating ability. When cutting, the cutting length,
Since the length of the guillotine cutter is longer than that of an ordinary cylindrical case, a large stress is applied to the tip of the guillotine cutter for a long time, and there is a disadvantage that the blade is easily spilled.

Further, the cutting of the hollow fiber membrane resin fixing portion by a cutting method using a guillotine cutter utilizes a principle that stress concentration generated in a portion damaged by a blade is spread to other portions as the cutting progresses. As a result, the cut surface of the hollow fiber membrane resin fixing portion is liable to be cracked, and cutting burrs are likely to occur on the outer periphery of the cylindrical case having high hardness.

There is also a cutting device for cutting the hollow fiber membrane resin fixing portion of the cylindrical case by a rotary blade mounted on a rotary shaft instead of a guillotine cutter, but a single rotary blade is used to cut the hollow fiber membrane resin fixing portion. A large amount of burrs are generated for cutting, and only a cylindrical case with low cut surface smoothness can be obtained.
Further, there is a disadvantage that chips of the fixing resin easily enter and adhere to the hollow fiber membrane.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and cuts a hollow fiber membrane resin fixing portion of a cylindrical case, particularly a cylindrical case having a large diameter. In this regard, an object of the present invention is to provide a cutting device and a cutting method for a hollow fiber membrane resin fixing portion in which a cut surface has high smoothness and resin chips are less likely to enter the hollow fiber membrane.

That is, the cutting device for a hollow fiber membrane resin fixing portion of the present invention is a cutting device for a hollow fiber membrane resin fixing portion of a cylindrical case in which a hollow fiber membrane bundle is resin-fixed to one end inside a cylindrical case. A rough cutting section for cutting the hollow fiber membrane resin fixing section by the rotary blade for rough cutting, and a finish cutting section for further cutting the end face by the rotary blade for finishing. Further, the method of cutting the hollow fiber membrane resin fixing portion of the present invention, the hollow fiber membrane resin fixing portion of the cylindrical case in which the hollow fiber membrane bundle is resin-fixed at one end inside the cylindrical case,
After cutting with a rotary cutter for rough cutting, the end face is further cut with a rotary cutter for finishing to smooth the end face.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hollow fiber membrane resin fixing device according to the present invention.
FIG. 1 is a plan view showing one embodiment of a cutting device for a hollow fiber membrane resin fixing portion of the present invention. In FIG. 1, 1a and 1b, 2a and 2b, 3a and 3c, and 4a and 4b are overlapped in the front-rear direction, respectively. The numbered members are arranged on the rear side.

[0009] The rough cutting rotary blade rotating motor 1a is provided with a rough cutting rotary blade 2 for initially cutting the hollow fiber membrane resin fixing portion.
This is a motor for rotating a, and an AC servomotor or the like controlled by a variable-speed inverter control can be used. The rotary blade 2a for rough cutting, which constitutes a rough cutting portion, is a rotary blade for roughly cutting the hollow fiber membrane resin fixing portion. As shown in FIG. A hard tip saw or the like can be used. The one-axis stage 3a is a stage for moving the rough cutting rotary blade 2a in the vertical direction, and is driven by a hydraulic cylinder 4a.

The cylindrical cases 5 and 6 each have a hollow fiber membrane fixed to a resin at one end inside the cylindrical case, and are arranged on the index table 9 every 180 degrees. The index table 9 is for rotating the cylindrical case by 180 degrees at a time, and the cylindrical case mounted at the position farthest from the position of the rotary blade in the figure is rotated by the index table, and the position of the cylindrical case 5 ( At the closest position of the rotary blade), the hollow fiber membrane resin fixing portion is cut. A hydraulic table or the like can be used as the index table.

The clampers 7 and 8 are for fixing the cylindrical cases 5 and 6 on the index table 9, respectively, so that when the hollow fiber membrane resin fixing portion is cut, the cylindrical cases 5 and 6 are not shifted. Designed to support from the top and sides of the The one-axis stage 10 moves the index table 9 in the left-right direction in the figure, and is driven by an AC servomotor, a pulse motor, or the like. The apparatus gantry 11 is a gantry for fixing the apparatus, and the frame 12 is provided with a rough-cutting rotary blade rotating motor 1a, a rough-cutting rotary blade 2a, a one-axis stage 3a, a hydraulic cylinder 4a, and a finishing rotary blade to be described later. The motor 1b, the finishing rotary blade 2b, the one-axis stage 3b, and the hydraulic cylinder 4b are fixed.

The finishing rotary blade rotating motor 1b is a motor for rotating the finishing rotary blade, and an AC servomotor of an inverter control of a variable rotation speed type or the like can be used. The finishing rotary blade 2b constituting the finishing cutting section is a rotary blade for further cutting the roughly cut hollow fiber membrane resin fixing section, and as shown in FIG. The hollow fiber membrane resin fixing portion can be cut by not being provided, and the teeth formed on the outer peripheral portion continuously contacting the hollow fiber membrane resin fixing portion. As such a finishing rotary blade, a slitter, a circular knife, a high-speed steel circular cutting blade, or the like can be used. The one-axis stage 3b moves the finishing rotary blade 2b in the vertical direction, and is driven by a hydraulic cylinder 4b.

Next, referring to FIG. 1, the operation of the cutting device of the hollow fiber bundle resin fixing portion of the present invention will be described from the initial state of the operation of the device. First, when an operation start switch of the entire apparatus (not shown) is pressed, the rotary blade rotating motor 1a for rough cutting and the rotary blade rotating motor 1b for finishing are started to rotate at a preset number of rotations. Thereafter, when the apparatus cylindrical case is placed on the clamper 8 on the index table 9 and a clamp & index rotation ON switch (not shown) is pressed, the cylindrical case is fixed by the clamper 8 and the index table 9 rotates 180 degrees. , To the position of the cylindrical case 5. Thereafter, the one-axis stage 10 moves to the left in the drawing, so that the cut portion of the cylindrical case moves to just below the rough cutting rotary blade 2a.

Thereafter, the one-axis stage 3a for moving the rotary cutting blade 2a in the vertical direction is moved downward, and the hollow fiber membrane resin fixing portion of the cylindrical case 5 is roughly cut by the rotary cutting blade 2a. . After the end of the rough cutting, the one-axis stage 3a moves upward, and at the same time the rotary blade for rough cutting returns to the original position, the one-axis stage 3b for moving the rotary blade for finishing 2b in the vertical direction moves downward. Moving and finishing rotary blade 2b
Thereby, the cut end face of the hollow fiber membrane resin fixing portion of the cylindrical case is further cut. FIG. 2 is a schematic diagram showing the relationship of cutting positions when cutting the hollow fiber membrane resin fixing portion of the cylindrical case by the cutting device of the present invention. It is set so that a portion of 0.5 to 1 mm from the cut end surface can be cut. After the completion of the cutting by the finishing rotary blade, the one-axis stage 3b moves upward, and the finishing rotary blade returns to the original position. In addition, the one-axis stage 10 also moves to the operation start origin in the right direction in the figure.

After these operations are completed, the cylindrical case to be cut next is placed on the clamper 7b on the index table 9, and the clamp & index rotation ON switch (not shown) is pressed again. Then, the cylindrical case at the position 6 is fixed by the clamper 8, rotated by 180 degrees on the index table 9, and repeats the above-described cutting operation.
At this time, the cylindrical case from which the cutting of the hollow fiber membrane resin fixing portion has been completed is moved from the position of the cylindrical case 5 to the position of the cylindrical case 6. Do.

In the cutting apparatus and the cutting method according to the present invention, the hollow fiber membrane resin fixing section is roughly cut by the rough cutting rotary blade and then further cut by the finishing rotary blade. The burrs generated at the time are removed by cutting with the finishing rotary blade, which can improve the smoothness of the cut surface of the resin fixing portion of the hollow fiber membrane and cut the resin chips with less penetration into the hollow fiber membrane. It can be carried out.

More preferably, when the feed speed of the rotary blade for rough cutting is 700 mm / min or less and the feed speed of the rotary blade for finishing is 300 mm / min or less, damage to the teeth of the rotary body can be prevented. The life of the body can be prolonged, and a cylindrical case having a cut surface with high smoothness can be obtained. When the rotational speed of the rotary blade for rough cutting is 2500 to 4000 rpm, rough cutting can be performed with high cutting efficiency, and when the rotational speed of the rotary blade for finishing is 50 to 200 rpm, the cut surface with even higher smoothness can be obtained. Can be obtained.

Further, when the cutting is performed while spraying a gas to which pressure is applied to the rotary blade and / or the hollow fiber membrane resin fixing portion, the efficiency of removing burrs and chips during cutting can be further improved. it can. The gas injection at this time is, for example, 4
kgf / cm ² normal temperature compressed air with a duty ratio of 50%
(1 second ON, 1 second OFF) It can be carried out under the conditions of application, but it is preferable to appropriately set the type of ejected gas, pressure, application duty ratio, and the like according to the cutting conditions.

Further, in the cutting device and the cutting method of the hollow fiber membrane resin fixing portion of the present invention, a fail-safe mechanism which is essentially safe even if an erroneous operation is performed, a resin cutting device which prevents scattering of resin chips, and the like. A dust collection mechanism, a blade cooling mechanism for reducing the generation of burrs due to a rise in blade temperature, and a tubular case automatic attachment / detachment mechanism for promoting automation may be provided. Among the device parts (not shown), for the control equipment, the operation of the present invention is realized by mounting a programmable controller in the control panel and executing the above sequence, but a personal computer including a factory computer It is also possible to change to a device that can achieve the same effect, such as a hardware and a hardware sequencer.

[0020]

According to the cutting apparatus and the cutting method of the hollow fiber bundle resin fixing portion of the present invention, the hollow fiber membrane resin fixing portion of the cylindrical case in which the hollow fiber membrane is resin-fixed at one end inside the cylindrical case. At the time of cutting, after the hollow fiber membrane resin fixing portion is cut by the rough cutting rotary blade, the end face is further cut by the finishing rotary blade, so that a cylindrical case having high cut surface smoothness can be obtained. At the same time, it is possible to perform cutting with less intrusion of cut into the hollow fiber membrane.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of a cutting device for a hollow fiber membrane resin fixing portion of the present invention.

FIG. 2 is a cross-sectional view showing a relationship between cutting positions when a cylindrical case is cut by the cutting device of the present invention.

FIG. 3 is a schematic view showing one embodiment of a rough cutting rotary blade used in the present invention.

FIG. 4 is a schematic view showing one embodiment of a finishing rotary blade used in the present invention.

[Explanation of symbols]

 1a Rotating blade rotating motor for rough cutting 1b Rotating blade rotating motor for finishing 2a Rotating blade for rough cutting 2b Rotating blade for finishing 3a 1-axis stage 3b 1-axis stage 4a Hydraulic cylinder 4b Hydraulic cylinder 5, 6 Tubular case 7, Reference Signs List 8 clamper 9 index table 10 single-axis stage 11 device mount 12 frame 13 cylindrical case 14 hollow fiber membrane resin fixing part 15 hollow fiber membrane

Claims (5)

[Claims] In a cutting device for a hollow fiber membrane resin fixing portion of a cylindrical case in which a hollow fiber membrane bundle is resin fixed to one end inside a cylindrical case, the hollow fiber membrane resin fixing portion is roughened by a rotary blade. A cutting device for a hollow fiber membrane resin fixing portion, comprising: a rough cutting portion for cutting; and a finishing cutting portion for further cutting an end face thereof by a rotary blade for finishing. 2. A hollow fiber membrane resin fixing portion of a cylindrical case in which a hollow fiber membrane bundle is resin-fixed at one end inside the cylindrical case is cut with a rotary cutter for rough cutting, and then the end face is finished. A method for cutting a hollow fiber membrane resin fixing portion, characterized by further cutting by a rotary blade to smooth the end face. 3. The feed speed of the rotary blade for rough cutting is 700 mm.
/ Min or less, feed speed of finishing rotary blade is 300mm
3. The method for cutting a hollow fiber membrane resin fixing part according to claim 2, wherein the hollow fiber membrane resin fixing part is cut under a condition of not more than / min. 4. The rotational speed of the rough cutting rotary blade is 2500-4.
000 rpm, the number of rotation of the finishing rotary blade is 50 to 200
The method for cutting a hollow fiber membrane resin fixing portion according to claim 2 or 3, wherein the hollow fiber membrane resin fixing portion is cut under a condition of rpm. 5. The hollow fiber membrane resin fixing portion is cut while spraying a pressure-applied gas to the hollow fiber membrane resin fixing portion from the inside of the rotary blade and / or the cylindrical case. 5. The method for cutting a hollow fiber membrane resin fixing portion according to 4.