JPH05200886A - Rolling device and rolling method - Google Patents

Abstract

PURPOSE:To enable rolling without using rolling rolls. CONSTITUTION:A couple of rolling bodies 1 with tapered side sectional shape are disposed oppositely and fixed by support tools 3. Clearances S of rolling sections formed at the ends 1a of rolling bodies 1 are adjusted by moving a support bar 4 forward and backward. Vibration is applied to the rolling bodies 1 by vibration generating devices (supersonic vibrators) 7 connected at the rear sections of rolling bodies 1 for resonance. A material to be rolled is fed to rolling sections of ends 1a while the rolling bodies 1 are made to resonate. The material to be rolled is extruded by the thrust generated by vibrating the rolling bodies 1 and rolled to manufacture a rolled sheet 11. Physical properties different from heretofore available are imparted to the material to be rolled by rolling by vibration. The method is suitable for rolling a composite material, and for example, suitable for accelerating impregnation of carbon fiber with resin and dispersion of carbon fiber in resin to manufacture a prepreg sheet of high strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling apparatus and a rolling method, and more particularly, to a rolling apparatus and a rolling method for rolling by applying vibration to a rolling body without using a rolling roll.

[0002]

2. Description of the Related Art Conventionally, rolling methods and rolling devices using rolling rolls have been known, and foods are made from organic materials such as plastics, elastomers and pitches, inorganic materials such as glass, ceramics and inorganic polymers or metal materials. Widely used for rolling products. In this case, the material 9 to be rolled is sandwiched between two rolling rolls 12 as shown in FIG. 7, rolled by receiving a pressing force F from the rolling rolls 12 and fed out by the rotation N of the rolling rolls. It has become.

Further, the rolling method and rolling apparatus using the above-mentioned rolling rolls are used as they are for the production of new materials such as composite materials. For example, a technique is known in which a carbon fiber bundle (roving) is dipped in a molten resin and then rolled with a calendar roll to produce a prepreg sheet. There is also known a technique of manufacturing a prepreg sheet by rolling carbon fibers (primary composite material) impregnated with resin powder in advance with a calendar roll heated to a temperature at which the resin melts.

[0004]

However, the conventional rolling method and rolling apparatus using the above-mentioned rolling rolls have the following problems.
There is a problem that it is not suitable for rolling composite materials. That is, when a prepreg sheet of carbon fibers is manufactured by rolling with a rolling roll, it is not possible to sufficiently remove the air that has entered the gaps between the carbon fibers, resulting in insufficient impregnation of the resin into the carbon fibers. There's a problem. In addition, if the carbon fibers in the resin are not evenly dispersed, there is a problem that the resin is rolled as it is. If the carbon fibers are not sufficiently impregnated with the resin, or if the carbon fibers are dispersed in the resin unevenly, there is a problem that a high-strength prepreg sheet cannot be obtained.

The present invention has been made in view of the above-mentioned problems, and by rolling by vibration without using a rolling roll, it is possible to impart physical properties that are different from those of conventional materials to be rolled. An object of the present invention is to provide a rolling apparatus and a rolling method capable of promoting impregnation of a resin and dispersion of carbon fibers in the resin to produce a high-strength prepreg sheet having physical properties different from those of a conventional object to be rolled.

[0006]

In order to achieve the above object, a rolling apparatus of the present invention comprises a pair of rolling bodies which are partially or wholly formed in a tapered shape, and a tapered tip portion of the pair of rolling bodies. A rolling portion formed so as to face each other with a gap, and a vibration generator that is coupled to each of the above-mentioned rolled bodies and causes each rolled body to vibrate at a resonance frequency to resonate, are preferable. , Which has an automatic frequency tracking function. Further, the rolling method of the present invention, a pair of rolled bodies partially or wholly formed in a tapered shape, are arranged facing each other with a gap in the tapered portion,
Then, at least the tapered portions of the pair of rolled bodies are caused to resonate, and a material to be rolled is supplied to the gap to continuously roll-form a long shaped product, preferably the gap. The material to be rolled is a long fibrous solid material and a fluid-like material containing a thermoplastic resin or a thermosetting resin as a main component. It is configured to be rolled and molded into.

[0007]

EXAMPLES The present invention will be described in detail below based on examples. First, the rolling apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a rolling section of a rolling apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view of the rolling body.

In these drawings, reference numeral 1 denotes a rolled body, which is formed by tapering the side cross-sectional shape of the body portion 1b so as to taper toward the tip direction.
The side cross-sectional shape of the tip portion 1a which is continuous with b is formed in a tapered shape having an acute angle with respect to the body portion 1b. That is, the taper inclination angle α ′ of the tip portion 1a is larger than the taper inclination angle α of the body portion 1b. Then, the pair of the rolled bodies 1 are arranged in a pair so as to face each other in the longitudinal direction, so that the body portion 1
The volume of the facing portions of b is increased and the front portion 1
The opposing portions of a are formed as parallel rolling portions having a predetermined gap. Here, the rolling body 1 is formed in a tapered shape in order to increase the propulsive force due to the vibration of the rolling body 1. In addition, in the rolled body 1, the tip portion 1a does not necessarily have to be formed in a tapered shape having an acute angle with respect to the body portion 1b.
It is preferable that the tip portion has an acute angle. Further, the rolled body 1 is
The entire body 1b, that is, the entire rolled body 1 may be tapered.

A pin hole 1d for fixing is provided on the side surface 1c of the rolled body 1.
Has been drilled. It is preferable that the position where the fixing pin hole is formed, that is, the position at which the rolled body is supported and fixed, is the position of the resonance node of the rolled body 1. Thereby, the rolled body 1
Can be prevented from being transmitted to parts other than the rolled body 1,
Further, the rolled body 1 can be fixed without disturbing the resonance of the rolled body 1.

As the material of the rolled body 1, various materials such as ceramics and graphite as well as metallic materials can be used. Among these materials, the material having less transmission loss of vibration at the forming temperature is used. Are preferable, and particularly, duralumin, titanium alloy, K-monel, phosphor bronze, graphite and the like are preferable. Furthermore, rolled body 1
In order to improve wear resistance and corrosion resistance, or to reduce the coefficient of friction with the molding material, various plating treatments or coating treatments can be applied.

Reference numeral 2 denotes a support, which fixes the rolling body 1 with fixing pins 3. Further, the support tool 2 is fixed to the support column 5 via the support rod 4. A male screw is formed on the support rod 4, and a female screw (tap screw) is formed on an insertion hole of the support rod 4 in the support column 5. Then, by moving the support rod 4 forward or backward, the front portion 1 of the rolling body 1
The gap S of the rolling portion formed in a can be adjusted. Reference numeral 5a is a lock nut for fixing the support rod 4 to the column 5.

Reference numeral 6 denotes a far infrared heater, which is a rolled body 1.
The rolling body 1 is heated in a non-contact state. The far-infrared heater 6 can be fixed to the rolling body 1 or the pillar 5, but when it is directly fixed to the rolling body 1, a portion of the rolling body 1 in a resonance state that does not vibrate, that is, It is preferable to perform fixation at the knot. It is also possible to directly attach the contact type heater to the rolling body 1, but in this case, since most of the rolling body 1 vibrates, the wiring of the heater or the temperature controller should not be cut by the vibration. Need to be careful.

Reference numeral 7 denotes a vibration generator 7 for applying vibration to the rolled body 1, which is connected to a rear portion of the rolled body 1 at a position where the rolled body 1 resonates. This vibration generator 7
Is not particularly limited, and, for example, an ultrasonic vibrator, an electrodynamic vibrator, a hydraulic vibrator, etc. are used. The frequency of vibration is not limited and may be in the range of 10 Hz to 10 MHz, for example. Of these, the vibration frequency is 10 to 10
An ultrasonic oscillator of 0 KHz is suitable because it has the highest electric efficiency of 90% or more. Furthermore, as the vibration mode, in addition to longitudinal vibration, lateral vibration, radial vibration, torsional vibration,
It is also possible to use flexural vibration or the like.

By adjusting the frequency of vibration of the vibration generator 7, the resonance state of the rolled body 1 can be changed. As for the resonance state (resonance mode), the half-wavelength resonance in which the deformation waveform W of the rolled body 1 is 1/2 wavelength as shown in FIG. 3 and the displacement waveform W of the rolled body 1 as shown in FIG. Examples include n-wavelength resonance, which is n-wavelength.

As described above, by making the rolling body 1 tapered and resonating, the vibration amplitude can be gradually amplified toward the tip of the rolling body 1, and the propulsive force due to the vibration is applied to the rolling body. Can be granted. In order to change the amplitude of the vibration, a vibration transmitter (not shown) for transmitting the vibration is interposed between the vibration generator 7 and the rolling body 1, and the vibration transmitter 7 generates the vibration transmitter. It may be designed to resonate at the frequency of vibration, and the shape may be selected so as to have a desired amplitude. This makes it possible to easily increase or decrease the amplitude of the vibration generated by the vibration generator 7. In order to efficiently transmit the amplitude of the vibration generated by the vibration generator 7 to the rolling body 1, the vibration generator 7
It is preferable to adjust the length and the like of the vibration transmitter so that the contact portion of the rolled body 1 and the antinode portion of the resonance coincide with each other. Reference numeral 8 denotes an ultrasonic oscillator, which causes the vibration generator (ultrasonic vibrator) 7 to generate vibrations to excite the rolling body 1 to resonate the rolling body 1.

The vibration generator 7 preferably has an automatic frequency tracking function and an automatic power control function. As an automatic frequency tracking function, a PLL (phase)
Locked loop), dynamic impedance period method, bridge method, transformer operation method, etc.
It is preferable to adopt the method. For example, when using ultrasonic vibration, the resonance frequency of the rolling body 1 is designed and manufactured in advance to a frequency that can be tracked by the oscillator 8, and the resonance frequency with respect to momentary load changes until the molding material is rolled and extruded Can be configured to constantly track the changes in the power supply (automatic frequency tracking function), and to supply the necessary amount (less than the maximum output) of the required power according to the momentary changes (the automatic power control function). preferable.

Next, an embodiment of the rolling method of the present invention using the rolling apparatus having the above structure will be described.

FIGS. 5 and 6 are front views showing a state where the prepreg sheet is roll-formed by using the rolling apparatus of the present invention shown in FIG. First, the support rod 4 is moved back and forth to adjust the gap S of the rolling portion formed on the tapered tip portion 1a of the rolling body 1. Next, the rolling device 1 is vibrated by the vibration generator 7, and the frequency of the vibration is adjusted to the resonance frequency to cause the rolling device 1 to resonate. In this state, the rolled body 1
A material to be rolled (forming material) is supplied from the upper part between them, and the material to be rolled 9 is pushed out and rolled by a propulsive force due to vibration. Since the rolled body 1 has a tapered shape and resonates so that the vibration amplitude increases toward the tip, a large propulsive force can be obtained.

When carbon fiber roving impregnated with resin powder is used as the material to be rolled 9 (FIG. 5)
The material 9 to be rolled and the rolled body 1 are heated by the far infrared heater 6 and the temperature controller 6a to a temperature at which the resin melts. Further, when carbon fiber roving is used as the material to be rolled 9 (FIG. 6), the rolled body 1 is provided with a far infrared heater 6
The prepreg sheet 11 is manufactured by heating the prepreg sheet 11 with the molten resin 10 interposed between the rolled bodies and rolling through the molten resin 10 through a carbon fiber roving.

The present invention is not limited to the above embodiment,
The present invention can be appropriately modified and implemented within the scope of the present invention. For example, the material to be rolled is not limited to resin-impregnated carbon fiber, but other composite materials such as fiber reinforced resin, organic materials such as plastics, elastomers and pitches, inorganic materials such as glass, ceramics and inorganic polymers, metal materials, etc. Besides, it can be applied to rolling of foods. Further, the number of the rolled bodies 1 is not limited to one, and may be two or more as required. Furthermore, it can be applied to the rolling of complicated shapes other than sheets,

[0021]

[Experimental Example] The present invention will be described more specifically below based on an experimental example.

Experimental Example 1 Using the rolling apparatus shown in FIG. 1, the gap of a titanium alloy rolling body (see FIG. 2B) was adjusted to 30 μm, and an ultrasonic oscillator (Seidensha Electronics Co., Ltd.) was used. Made; SONOPET 12
00B, fundamental frequency 19.15 [KHz]) was connected to a PZT type ultrasonic vibrator, and a rolled body having a width of 60 mm was made to resonate at 1/2 wavelength. The vibration mode is vertical vibration, and the vibration condition is that the longitudinal amplitude on the drive side (oscillator side) of the rolled body is 20.
(Μm) and the longitudinal amplitude of the front portion was 44 (μm). Also,
The rolled body was heated to 350 ° C. with a far infrared heater. Next, a material to be rolled (60% by weight of carbon fiber, 40% by weight of polycyanoether) obtained by impregnating carbon fiber roving with polycyanoether powder was supplied to the rolling section. The material to be rolled was preheated to 350 ° C. by the far infrared heater. Under the above conditions, the rolled material was resonated by ultrasonic vibration, and the material to be rolled was roll-formed to obtain a prepreg sheet. The obtained prepreg sheet had a width of 15 mm, a thickness of 33 μm, a void (air bubble) content of 0.5 vol% or less, a tensile strength of 2600 kg / cm ² , and was free from distortion such as warpage. The results are shown in Table 1.

Comparative Example 1 Using the rolling roll apparatus shown in FIG. 7, a material to be rolled obtained by impregnating carbon fiber roving with polycyanoether powder (60% by weight of carbon fiber, 40w of polycyanoether).
t%) was fed between the rolling rolls heated to 350 ° C. The material to be rolled was preheated to 350 ° C. by the far infrared heater. In this way, the material to be rolled was roll-formed. In addition, the number of rolling rolls was one, and the width of the rolling roll was 60 mm. The obtained prepreg sheet has a width of 15
mm, the thickness was 35 μm, the void content was 2.3 vol, and the tensile strength was 2050 Kg / cm ² . The results are shown in Table 1.
Shown in. [Margins below]

<Table 1> ─────────────────────────────── Width Width Thickness Void content Tensile strength [mm] [μm ] [Vol%] [Kg / cm ² ] ─────────────────────────────── Experimental Example 1 15 33 0.5 The following 2600 ─────────────────────────────── Comparative Example 1 15 35 2.3 2050 ──────── ───────────────────────

Experimental Example 2 The same as Experimental Example 1 except that the material to be rolled was a long rod made of solder having a cross-sectional shape of 10 mm × 1 mm, the gap of the tip of the rolled body was 0.50 mm, and the temperature of the rolled body was 25 ° C. Similarly, a solder rolled plate was manufactured. The rolling speed is 15m / h,
The cross-sectional shape of the rolled plate was 17.31 mm × 0.54 mm.

[0026]

As described above, according to the rolling apparatus and the rolling method of the present invention, rolling can be performed by vibration of the rolling body without using a rolling roll, and physical properties different from those of the conventional rolling body can be obtained. It can be applied to a material to be rolled, and various products can be suitably roll-formed. Further, the rolling apparatus and rolling method of the present invention are suitable for rolling composite materials, for example, by promoting impregnation of resin into carbon fibers and dispersion of carbon fibers in the resin, it is possible to produce a high-strength prepreg sheet. ..

[Brief description of drawings]

FIG. 1 is a front view showing a rolling unit of a rolling device according to an embodiment of the present invention.

2 (a) is a perspective view of the rolled body, FIG.
(B) is a front view showing the dimensions of the rolled body used in Experimental Example 1.

FIG. 3 is a diagram showing a resonance state (1/2 wavelength resonance) of a rolled body.

FIG. 4 is a diagram showing another resonance state (n-wavelength resonance) of the rolled body.

FIG. 5 is a front view showing a state in which a prepreg sheet is roll-formed by using the rolling device of the present invention.

FIG. 6 is a front view showing another roll forming state.

FIG. 7 is a side view showing a conventional roll rolling device.

[Explanation of Codes] 1 ... Rolled body 1a ... Tip 1b ... Body 2 ... Supporting tool 3 ... Fixing pin 4 ... Support rod 5 ... Stand 6 ... Infrared heater 7 ... Vibration generator (ultrasonic transducer) 8 ... Ultrasonic oscillator 9 ... Rolled material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical indication location B29L 7:00 4F (72) Inventor Mitsuyoshi Watanabe 1280, Uezumizumi, Sodegaura, Chiba Idemitsu Kosan Co., Ltd. (72) Inventor Takashi Nakajima 2-9-13 Torigoe, Taito-ku, Tokyo Seidensha Denshi Kogyo Co., Ltd. (72) Inventor Noriaki Matsugishi 2-9-13 Torigoe, Taito-ku, Tokyo Seidensha Electronics Industry Co., Ltd.

Claims (4)

[Claims] 1. A pair of rolled bodies partially or wholly formed in a taper shape, a rolling section formed by facing tapered tip portions of the pair of rolled bodies with a gap therebetween, and the rolling sections are respectively coupled to the rolled bodies. And a vibration generator that applies vibration at a resonance frequency to each rolling body to cause the rolling body to resonate. 2. The rolling apparatus according to claim 1, wherein the vibration generator has an automatic frequency tracking function. 3. A pair of rolled bodies partially or wholly formed in a tapered shape are arranged to face each other with a gap in the tapered portions, and then at least the tapered portions of the pair of rolled bodies are resonated. A rolling method characterized in that a material to be rolled is supplied to the gap to continuously roll-form a long shaped product. 4. The material to be rolled supplied to the gap is a long fibrous solid material and a fluid material mainly containing a thermoplastic resin or a thermosetting resin. The rolling method according to claim 3, wherein the shaped article is continuously roll-formed.