JP2014104597A - Plasticization apparatus and plasticization method of resin material including textile material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasticization apparatus and a plasticization method of a resin material that includes a textile material in which breakage of a textile material is reduced as much as possible, and a fiber of an on-target fiber length can be kept in a fraction of more than constant.SOLUTION: A plasticization apparatus 1 of a resin material r including a textile material f includes: a screw 5 disposed in an inner hole 2a of a heating cylinder 2; a resin supply hole 10 that is penetration-formed toward the inner hole 2a of the heating cylinder 2; a resin material feeder 6 that is disposed to communicate with the resin material supply hole 10; a textile material supply hole 27 that is penetration-formed performing eccentricity to an inner hole center 2b of the heating cylinder 2 at a front side than the resin supply hole 10; and a textile material feeder 7 that has a pushing-in mechanism 28 that is disposed to communicate with the textile material supply hole 27 and pushes the textile material in the inner hole 2a of the heating cylinder 2.

Description

The present invention relates to a plasticizing apparatus and a plasticizing method for a resin material containing a fiber material.

Patent Documents 1 to 3 have been known as examples of plasticizing and injecting a resin material containing a fiber material such as glass fiber or carbon fiber in an injection device provided with a screw. In Patent Document 1, as shown in FIG. 1, a main raw material inlet for resin material is provided behind a cylinder (heating cylinder), and an auxiliary raw material inlet such as glass fiber is provided in front thereof. Further, the screw at the position corresponding to the portion where the auxiliary raw material inlet is provided has a screw shaft with a diameter smaller than that of the front and rear portions. Accordingly, the fiber material is supplied from the auxiliary raw material inlet in a state where the pressure of the resin material is released at the portion where the diameter of the shaft is thin.

Also in Patent Document 2, an inlet pipe for supplying fibers such as glass fibers is connected to an intermediate portion of the heating cylinder. And in patent document 2, as FIG. 5 shows, glass fiber etc. are supplied from a reel, and are sent in a heating cylinder through an inlet pipe with a screw with an antifriction material. In Patent Document 3, a supply hole such as a filler is provided in an intermediate portion of the heating cylinder, and a screw-type supply device is connected to the supply hole.

JP-A-61-277421 (Claim 1, FIG. 1) JP 47-2191 A (Claim 1, drawing) JP-A-4-156320 (page 5, right lower column, FIG. 5)

The above-mentioned Patent Document 1 has a problem that only a hopper is provided on the fiber material sub-input device, and a bulky fiber material cannot be effectively pushed into the heating cylinder. . In addition, Patent Document 2 uses a screw, so there is more force to push the fiber material than Patent Document 1, but the portion from the screw to the inner hole of the heating cylinder is connected by an inlet pipe, which is also bulky. There was a problem when pushing high fiber materials into the heating cylinder. In that respect, Patent Document 3 has a short supply path portion corresponding to the inlet pipe, and it can be said that Patent Document 2 pushes a filler or the like into the heating cylinder inner hole by a screw. However, also in Patent Document 3, since the filler or the like is pushed into the heating cylinder from the radial direction (substantially perpendicular direction) with respect to the rotation trajectory of the screw, the filler or the like bites into the screw groove. It could not be sent to the front of the heating cylinder.

In the above document, it is possible to increase the pushing force of the fiber material supply device. However, when the fiber material is forcibly pushed in, the fiber material is cut, and the fiber length is as high as a certain ratio. It is considered that it is impossible to keep it at the same time. Therefore, in view of the above problems, the plasticizing apparatus and the plasticizing method for the resin material including the fiber material of the present invention can feed the fiber material well into the groove of the screw of the heating cylinder and send it forward. In addition, at that time, a plasticizing apparatus and a plasticizing method for a resin material including a fiber material capable of reducing the breakage and cutting of the fiber material as much as possible and maintaining a fiber having a desired fiber length at a certain ratio or more are provided. The purpose is to do.

Also, as a suboptimal issue, when the fiber material is carbon fiber, the object is to mix a good carbon fiber and a resin material to form a composite molded product of carbon fiber and resin having a predetermined strength. .

According to a first aspect of the present invention, there is provided a plasticizing apparatus for a resin material including a fibrous material. The plasticizing apparatus for a resin material includes a fibrous material for plasticizing and mixing the resin material and the fibrous material with a screw in a heating cylinder. A screw disposed in the inner hole of the heating cylinder, a resin material supply hole penetratingly formed toward the inner hole of the heating cylinder, a resin material supply device provided in communication with the resin material supply hole, A fiber material supply hole formed eccentrically with respect to the center of the inner hole of the heating cylinder in front of the resin supply hole, and a fiber material provided in communication with the fiber material supply hole are connected to the heating cylinder. And a fiber material supply device having a pushing mechanism for pushing into the inner hole.

The plasticizing device according to a second aspect of the present invention is the plasticizing device according to the first aspect, wherein the fiber material supply hole is eccentrically heated to a side where the direction of the rotation trajectory of the screw flight coincides with the fiber material supply direction. It is provided in the cylinder.

According to a third aspect of the present invention, there is provided the plasticizing apparatus according to the first or second aspect, wherein the groove depth of the screw groove portion corresponding to the fiber material supply hole is greater than the length of the fiber material to be supplied. It is also characterized by deepness.

A plasticizing device according to a fourth aspect of the present invention is the plasticizing device according to any one of the first to third aspects, wherein the screw includes a feed zone, a first compression zone, a first metering zone, a pressure from the rear. An opening zone, a second compression zone, and a second metering zone are provided, and the fiber material supply hole is provided so as to face rearward from an intermediate position in the pressure release zone or the second compression zone. It is characterized by being.

A plasticizing device according to a fifth aspect of the present invention is the plasticizing device according to any one of the first to fourth aspects, wherein the screw has a plurality of convex portions or a plurality of concave portions formed in a second metering zone. A mixing portion is formed.

According to a sixth aspect of the present invention, there is provided a plasticizing method comprising: a fiber material supplying device of a plasticizing apparatus for a resin material containing a fiber material according to any one of the first to fifth aspects; The fiber material to be pressed into is a carbon fiber.

An apparatus for plasticizing a resin material containing a fiber material according to the present invention is a plasticizer for a resin material containing a fiber material for plasticizing and mixing the resin material and the fiber material with a screw in the heating cylinder. A resin material supply hole provided in communication with the resin material supply hole, a resin material supply hole provided in communication with the resin material supply hole, and a resin material supply hole. A fiber material supply hole that is formed in a forward direction eccentrically with respect to the center of the inner hole of the heating cylinder, and a push that pushes the fiber material provided in communication with the fiber material supply hole into the inner hole of the heating cylinder Fiber material supply device with a mechanism is provided, so that fiber material breakage and cutting are reduced as much as possible when mixing with molten resin, and the fiber material with the desired fiber length is kept at a certain ratio or more Molding composite moldings of materials and resins It can be carried out plasticization of the order.

It is a schematic sectional drawing of the plasticizing apparatus of this embodiment. It is sectional drawing in the AA line in FIG.

FIG. 1 is a schematic cross-sectional view of the plasticizing apparatus of the present embodiment. However, in FIG. 1, the part of the fiber material supply device has a cross section along the line BB in FIG. The plasticizing apparatus 1 of the present embodiment is a plasticizing apparatus 1 for performing stamping molding, and a die (T die) 4 is attached to a nozzle 3 in front of the heating cylinder 2. And the screw 5 is provided in the inner hole 2a provided along the axial center of the heating cylinder 2 so that rotation and forward / backward movement are possible. A resin material supply device 6 is provided at the rear portion (not the rear end) of the heating cylinder 2. Further, a fiber material supply device 7 is provided in front of the resin material supply device 6 in the heating cylinder 2.

The plasticizing device 1 can be moved forward and backward by a servo motor of a moving device (not shown). Along with the movement of the plasticizing apparatus 1, the die 4 of the nozzle 3 is moved in the horizontal direction with respect to the cavity forming surface 8a of the lower mold 8 of the pressing apparatus (not shown). The screw 5 is driven to rotate by controlling the number of rotations by a screw rotation servomotor (not shown). The screw 5 can be moved forward and backward by an injection servo motor (not shown). The screw 5 is moved forward and backward by a known mechanism using a ball screw and a ball screw nut. In addition, about the servomotor of the moving apparatus of the plasticizing apparatus 1, the servomotor for screw rotation, and the servomotor for injection | emission, what used another drive sources, such as a hydraulic mechanism, may be used.

The heating cylinder 2 is provided with an electric heater (not shown) for each zone from the rear zone close to the resin material supply device 6 to the front zone close to the nozzle 3 so that the temperature can be controlled. A housing block 9 is fixed to the rear part of the heating cylinder 2, and a resin material supply hole 10 is formed by vertically penetrating the housing block 9 and the upper part of the heating cylinder 2 toward the inner hole 2a of the heating cylinder 2. Has been. A resin material supply device 6 is provided in communication with the resin material material supply hole 10. In the resin material supply device 6, a supply cylinder 11 is fixed in the horizontal direction at an upper part of a supply cylinder fixed in a vertical direction to a housing block 9 around the resin material supply hole 10, and a feed screw 12 is provided inside the supply cylinder 11. Is rotatably attached by a motor 13. A hopper 14 for storing the resin material r is attached to the upper part of the supply hole at the rear of the supply cylinder 11. In addition, about the resin material supply apparatus 6, it is not limited above, The thing which does not use the feed screw 12 may be used. However, it is desirable that the resin material supply device 6 be able to supply the resin material r by adjusting the supply amount of the resin material r to the inner hole 2 a of the heating cylinder 2.

A cylinder head 15 to which an electric heater is attached is fixed in front of the heating cylinder 2, and a nozzle 3 having a nozzle hole 3 a formed therein and attached to the outside is attached to the front of the cylinder head 15. . The nozzle hole 3 a communicates with the inner hole 2 a of the heating cylinder 2. The nozzle 3 is provided with a rotary opening / closing valve 16 for opening and closing the nozzle hole 3a. The open / close valve 16 may be other types such as a needle type shut-off valve, and is not essential when performing injection molding. A die (T die) 04 is fixed to the tip of the nozzle 3. A flow path communicating with the nozzle hole 3 a in the die 4 is directed downward and connected to a supply hole 17 having a predetermined width on the lower surface of the die 4.

The screw 5 of the present embodiment is provided with a relatively long screw 5 having a ratio L / D of 28, which is a ratio of the length L to the diameter D. The flights 5a of the screw 5 are provided at regular intervals, and no subflight or the like is formed. The zones of the screw 5 include, in order from the rear, a feed zone 18 in which the screw shaft 5b is formed in a certain thin state, a first compression zone 19 in which the screw shaft 5b is formed to be tapered and thick, and a screw shaft 5b. The first metering zone 20 is formed in a thick state, the screw shaft 5b is thinned again, the pressure release zone 21 is formed in a constant thinness, and the screw shaft 5b is formed so as to be thickened again in a tapered shape. A second compression zone 22 and a second metering zone 23 in which the screw shaft 5b is formed thick again are provided. In addition to the portion where the flight 5a is formed, the 2 metering zone 23 is formed with a mixing portion 24 in which a plurality of convex portions or a plurality of concave portions are formed without the flight 5a. A backflow prevention valve 25 is provided in front of the mixing section 24, and a triangular pyramid screw head 26 is provided in front of the mixing section 24. The center position 21a in the front-rear direction of the portion where the screw shaft 5b of the pressure release zone 21 of the screw 5 is formed to have a constant thinness is 16/28 from the rear in the entire portion where the flight 5a is in the screw 5. is there. That is, it is desirable that the center position 21a in the front-rear direction of the portion where the screw shaft 5b of the pressure release zone 21 is formed to have a certain thinness is located forward of the intermediate position of the entire screw 5, from the rear to 19/28. It is desirable to be in the range. The L / D of the screw 5 is not limited to the above and is preferably about 24 to 36. The length of each zone is also adjusted according to the length of the screw 5.

As an example, the compression ratio of the screw 5 is such that the compression ratio of the screw 5 in the first compression zone 19 is 1.8 to 3, and the compression ratio of the screw 5 in the second compression zone 22 is in the range of 1.2 to 2.0. It is desirable to do. The groove depth d of the groove portion 5b of the screw 5 corresponding to the fiber material supply hole 27 is desirably deeper than the length (average length) of the fiber material to be supplied. Therefore, in this embodiment, the groove depth d (flight height) of the pressure release zone 21 is deeper (longer) than the length (average length) of the fiber material.

About the surface treatment of the screw 5, it is preferable that hard coating, such as titanium nitride (Tin), chromium nitride (CrN), tungsten carbide (WCC), and hard chrome plating, is made.

In this embodiment, the screw 5 includes a first compression zone 19 and a first metering zone 20, but a general screw or a screw shaft in which a feed zone, a compression zone, and a metering zone are formed has a constant thickness. A screw may be used. That is, the resin material r1 is sufficiently melted by the heat transfer from the heating cylinder 2 up to the position where the fiber material is supplied from the fiber material supply device 7, and the flight of the screw 5 at the position where the fiber material is supplied. As long as it is satisfied that a space other than the molten resin r1 is secured between 5a, the screw may have a shape other than that shown in FIG. Even in these screws. It is desirable that the groove depth of the groove portion of the screw corresponding to the fiber material supply hole is deeper (longer) than the length (average length) of the fiber material to be supplied.

As shown in FIG. 2, which is a cross-sectional view of the heating cylinder 2 as viewed from the front, it is an intermediate portion of the heating cylinder 2 ahead of the resin material supply hole 10 and faces the pressure release zone 21 of the screw 5. In the upper part of the portion, a fiber material supply hole 27 is formed so as to be eccentric and directed toward the inner hole center 2b of the heating cylinder 2. The position where the fiber material supply hole 27 is provided may be a position facing the second compression zone 22 as long as it is behind the intermediate position 22 a of the second compression zone 22. The positional relationship between the fiber material supply hole 27 and the screw 5 does not necessarily face the same position because the screw 5 moves back and forth by plasticization or injection (resin supply). However, it is desirable that the screw 5 is provided so as to always face the rear of the intermediate position 22a in the pressure release zone 21 or the second compression zone 22 even when the screw 5 moves forward and backward.

Regarding the positional relationship between the fiber material supply hole 27 and the circumferential direction of the heating cylinder 2, the fiber material supply hole 27 is removed from the center of the heating cylinder 2 (center of the screw shaft 5 b) on one side ( It is formed on the right side in FIG. More specifically, in FIG. 2, the screw 5 is rotated clockwise (right rotation as viewed from the front), but the fiber material supply hole 27 is also biased to the right, which is the rotation direction of the screw 5, from the inner hole center 2b. It is formed with a core. The fiber material supply hole 27 may be formed so as to include a position directly above the inner hole center 2b of the heating cylinder 2, or may be formed so as not to be included as shown in FIG. Further, the fiber material supply hole 27 may be formed so as to include the side end 2c of the inner hole 2a of the heating cylinder 2 as shown in FIG. Further, although not shown, the side of the inner hole 2a of the heating cylinder 2 below the fiber material supply hole 27 may be expanded. In this case, the inner hole 2a is not a perfect circle, and a gap having a constant width is formed between the screw 5 and the portion corresponding to the side surface end 2c of the inner hole 2a in FIG. In the above, the fiber material supply hole 27 is provided above the portion where the gap is formed, or above the portion where the gap is formed and the screw 5.

Moreover, in FIG. 1, FIG. 2 of this embodiment, although the shape (direction) of the fiber material supply hole 27 is formed in the perpendicular direction, as an example, it is diagonally in the range of 0 to 45 ° with respect to the vertical line. The fiber material supply hole 27 may be formed. Furthermore, the shape of the fiber material supply hole 27 in the axial direction of the screw shaft 5b is not limited to the vertical direction, and as an example, in the oblique direction in the range of 0 to 60 ° with respect to the vertical line toward the front of the heating cylinder. It may be formed.

There is provided a fiber material supply device 7 that communicates with the fiber material supply hole 27 and has a pushing function of pushing the fiber material f into the inner hole 2 a of the heating cylinder 2. In the fiber material supply device 7, the tip of a supply tube 28 provided in the vertical direction is tapered and connected to the fiber material supply hole 27. More specifically, the heating cylinder 2 around the fiber material supply hole 27 and the tip of the supply cylinder 28 are connected and fixed. A screw 29 is built in the supply cylinder 28 so that it can be rotated by the electric motor 30 and cannot be moved forward and backward. In the present embodiment, the screw 29 is housed in a cylindrical portion inside the supply tube 28, but it may be shaped such that a flight or a screw with a tapered shaft is located in a tapered portion.

The screw 29 and the electric motor 30 correspond to a pushing mechanism, and when the screw 29 rotates, the fiber material f is forcibly sent downward and sent to the inner hole 2a of the heating cylinder 2 through the fiber material supply hole 27. . Further, a supply hole 32 for the fiber material f communicating with a pipe connected from the hopper 31 is provided on the side of the upper portion of the supply cylinder 28. In the present embodiment, the cut fiber material f is supplied into the supply cylinder 28 via the pipe connected from the hopper 31 and the supply hole 32. However, the fiber material may be forcibly supplied from the hopper 31 into the supply cylinder 28 by a screw or the like.

The fiber material supply device 7 is not limited to the vertical direction as in the application example of the fiber material supply hole 27, and may be formed with an angle with respect to the vertical direction. The fiber material supply device 7 may be a device that pushes the fiber material into the inner hole 2a of the heating cylinder 2 by a plunger-type pushing device. In this embodiment, the fiber material supply device 7 stores the fiber material f that has been cut in advance in the hopper 31, but the fiber material f that has been unwound from a reel (not shown) is cut by a cutting device (not shown). Further, it may be supplied to the fiber material supply device 7.

Next, the plasticizing method of the resin material r containing the fiber material f using the plasticizing apparatus 1 of this embodiment is described. As the fiber material f used in the present embodiment, a fiber material in which it is a problem that a long fiber cannot be left due to breakage or cutting at the time of plasticization is effectively used. As an example, a carbon fiber f is used. The resin material r is not limited, but polypropylene is used as an example.

The resin material r (polypropylene pellets) stored in the hopper 14 of the resin material supply device 6 is supplied to the inner hole 2a of the heating cylinder 2 by controlling the rotation speed and / or rotation time of the feed screw 12. . At this time, it is desirable to perform a starvation supply that limits the supply amount of the resin material r, and the supply is always performed so as to be about 20 to 70% with respect to the groove volume of the feed zone 18 of the screw 5.

The rotational speed of the screw 5 during plasticization depends on the screw diameter of the plasticizing apparatus 1, but is 50 to 100 r. p. m. Degree is desirable. By making the screw rotation speed (rotation speed) relatively low, breakage and cutting of the carbon fiber f when the carbon fiber f and the molten resin r1 described later are mixed can be reduced. The back pressure during plasticization is preferably 0 MPa. Thereby, breakage and cutting of the carbon fiber f can also be reduced. As for the back pressure, a low pressure back pressure of 1 MPa or less, more desirably 0.5 MPa or less may be applied. The supplied resin material r is sent to the front first compression zone 19 from the feed zone 18 first supplied through the resin material supply hole 10 as the screw 5 rotates. In the first compression zone 19, the shaft diameter of the screw shaft 5b is increased in a taper shape. Shear exotherm is applied between. Heat is also applied to the resin material r from the electric heater provided in the heating cylinder 2, and the melting of the resin material r proceeds.

In the next first metering zone 20, the resin material r is completely melted by shear heat generation and heat transfer from the heating cylinder 2. The molten resin r1 in a molten state is further sent from the first metering zone 20 to the pressure release zone 21 in front of the screw 5. Next, in the pressure release zone 21, the screw shaft 5b is tapered and the pressure of the molten resin r1 is released. The pressure release zone 21 has a portion where the screw shaft 5b is tapered and a certain portion where the screw shaft 5b is thin. In either of these portions, a molten resin is present in the groove between the flights 5a of the screw 5. The molten resin r1 is sent forward in a state where r1 is not full.

Then, the carbon fiber f is supplied from the fiber material supply device 7 through the fiber material supply hole 27 provided eccentrically on the upper portion of the heating cylinder 2 corresponding to the pressure release zone 21. In the present embodiment, the carbon fiber f having a thickness of 7 μm and a length of 9 mm is prepared and supplied. However, the carbon fiber f is not limited to the above, and a length of 5 to 15 mm is desirable. The carbon fiber f is forcibly sent downward from the hopper 31 by the pushing mechanism of the screw 29, and between the flights 5a of the screw 5 provided in the inner hole 2a of the heating cylinder 2 through the fiber material supply hole 27. Supplied to the groove. At the time of plasticization, the molten resin r1 containing carbon fibers is stored in front of the heating cylinder 2 and the screw 5 is retracted, so that the correspondence between the screw 5 and the fiber material supply hole 27 is not always the same position. Any part of the pressure release zone 21 faces the fiber material supply hole 27.

At this time, as shown in FIG. 2, the fiber material supply hole 27 is formed eccentrically with respect to the inner hole center 2 b of the heating cylinder 2, and the side on which the flight 5 a of the screw 5 is rotated. Is formed. Accordingly, the falling direction of the carbon fiber f from the fiber material supply hole 27 and the direction of the rotation trajectory of the flight 5a of the screw 5 substantially coincide with each other, and the carbon fiber f is satisfactorily supplied into the groove portion of the screw 5 and sent forward. . At this time, since the pressure of the molten resin r1 in the groove portion of the screw 5 is released and there is a gap in the groove portion, mixing of the carbon fiber f and the molten resin r1 is not hindered, and the molten resin r1 does not overflow from the fiber material supply hole 27 and does not block the fiber material supply hole 27. Further, the carbon fiber f is prevented from being broken or cut as much as possible because the carbon fiber f is not forcedly pushed away by pushing the molten resin r1 away by the fiber material supply device 7. Further, since the groove depth d of the open air zone 21 of the screw 5 is deeper (longer) than 9 mm which is the length of the supplied carbon fiber f, breakage of the carbon fiber f is further prevented. .

The supply of the carbon fiber f is preferably continued during the plasticization, and the supply amount is adjusted by adjusting the rotational speed of the screw 5 by the electric motor 30. That is, the rotation of the main screw 5 of the plasticizing apparatus 1 and the rotation of the screw 29 of the fiber material supply apparatus 7 are generally performed in conjunction with each other. The supply amount of the carbon fiber f is desirably set so that the weight of the carbon fiber f is 15 to 40% by weight with respect to the total weight of the composite material obtained by mixing the polypropylene which is the resin material r and the carbon fiber f. If the ratio of the carbon fiber f is too small, a desired strength cannot often be obtained in the composite molded product of the carbon fiber and the resin material. If the ratio of the carbon fiber f is too high, good mixing cannot be performed in many cases.

After the carbon fiber f is introduced in the pressure release zone 21, the molten resin r1 and the carbon fiber f are sent to the second compression zone 22 while being mixed. In the second compression zone 22, the molten resin r <b> 1 containing the carbon fibers f is gradually increased in density again and mixed, sent to the second metering zone 23, and further compressed and heated. . Further, mixing of the carbon fiber f and the molten resin r1 is further promoted by the mixing portion 24 formed in front of the second metering zone 23. In this embodiment, the average length of the carbon fibers f mixed with the molten resin r1 is secured to about 4 mm, and sufficient strength is secured when a composite molded product of carbon fibers and a resin material is molded.

The molten resin r1 containing the mixed carbon fiber f passes through the backflow prevention valve 25 and is stored in front of the screw 5 in the inner hole 2a of the heating cylinder 2. At this time, the nozzle 3 of the plasticizing apparatus 1 is closed by an on-off valve 16 such as a rotary valve or a shut-off valve. Then, the screw rotation is continued by the servo motor for rotating the screw, the storage of the molten resin r1 containing the carbon fiber f in front of the screw 5 advances, the screw 5 moves backward, and the screw 5 moves backward to a predetermined position. Is stopped and the plasticizing process is terminated.

Next, when the previous molding is completed on the side of the pressing device (not shown) and the upper die and the lower die 8 are opened, the die 4 of the nozzle 3 of the plasticizing device 1 is shown above the heated lower die 8. Not moved by the moving device. When the die 4 finishes moving to a predetermined position on the lower die 8, the opening / closing valve 16 of the nozzle 3 is opened, and the screw 5 is driven forward by the drive of the injection servo motor, whereby the cavity of the lower die 8 is formed. Molten resin r1 containing carbon fiber f is supplied to surface 8a. When the supply of the molten resin r1 containing the carbon fiber f is completed, the plasticizing apparatus 1 and the die 4 are moved backward from the lower mold 8.

Next, in the press apparatus, the heated upper die is lowered and matched with the lower die 8, and the molten resin r1 containing the carbon fiber f is compression-molded according to the cavity shape. The upper mold and the lower mold 8 also have a cooling function. The mold is opened in a state where the molten resin r1 is cooled and solidified, and a composite molded product of carbon fiber and resin is molded. The press apparatus may be such that the lower mold 8 is movable in the horizontal direction and the stage to which the molten resin r1 containing the carbon fiber f is supplied is performed at a portion other than the lower part of the upper mold. Moreover, what lowers a raise and performs press molding may be used.

Furthermore, a carbon fiber sheet or a prepreg sheet is arranged in advance on the cavity forming surface 8a of the lower mold 8, and the one on which the molten resin r1 containing the carbon fiber f is supplied or the supplied carbon fiber f is used. A carbon fiber sheet or a prepreg sheet may be further placed on the molten resin r1 to be included, and it is also conceivable to make them into multiple layers. Further, a multilayer molded product may be molded by injecting another molten resin (which may or may not include carbon fiber) into a space in which a cavity is slightly opened after molding by a press device.

Furthermore, the inside of the heating cylinder 2 of the plasticizing apparatus 1 may be vacuumed by a vacuum pump. In that case, it is desirable to perform vacuum suction from the rear side of the resin material supply hole 10 of the heating cylinder through the resin material supply hole 10 at the rear of the heating cylinder. In addition, the press device may be a device that pressurizes a space formed when the upper die and the lower die are combined by vacuum suction with a vacuum pump. Further, the entire plasticizing apparatus 1 and the press apparatus, or the main part to which the molten resin r1 containing the carbon fiber f is supplied from the nozzle 3 to the lower mold 8 is put in a vacuum chamber, and the carbon fiber f is transferred from the nozzle 3 to the lower mold 8. The process of supplying the molten resin r1 containing may also be in a vacuum state.

Although the present invention is not enumerated one by one, it is not limited to that of the above-described embodiment, and it goes without saying that the present invention is applied to those modified by a person skilled in the art based on the gist of the present invention. is there. The plasticizing device may be an in-line type injection device screw that also performs an injection operation with a screw. Further, the plasticizer may be connected to the plunger device, and injection molding or stamping molding may be performed by performing an injection operation with the plunger device. In this case, the plasticizing device may be one in which the screw is moved forward and backward, or may be rotated in a fixed position without being moved forward and backward. Furthermore, the plasticizing apparatus may be used in an extruder in which a molten material including a fiber material is extruded from a front die as the screw rotates.

The fiber material used may be carbon fiber, glass fiber, Kepler fiber, metal fiber such as aluminum, and other types of fiber material such as natural fiber. Further, the resin material r is not limited, and may be a thermoplastic resin, a thermosetting resin, or a mixed material thereof. Examples of the thermoplastic resin include polypropylene, polyethylene, polystyrene, ABS resin, AS resin, polycarbonate, polyethylene terephthalate, polyamide, polyacetal, polyphenylene sulfide, polyphenylene ether, and the like, and other types of thermoplastic resins may be used.

DESCRIPTION OF SYMBOLS 1 Plasticization apparatus 2 Heating cylinder 2a Inner hole 3 Nozzle 5 Screw 5a Flight 5b Screw shaft 6 Resin supply apparatus 7 Fiber material supply apparatus 8 Lower mold | type 10 Resin material supply hole 21 Pressure release zone 27 Fiber material supply hole d Groove depth f Fiber material (carbon fiber)
r Resin material r1 Molten resin

Claims (6)

In a plasticizing apparatus for a resin material including a fiber material that is plasticized and mixed with a screw in a heating cylinder with a resin material and a fiber material,
A screw disposed in the inner hole of the heating cylinder;
A resin material supply hole formed through the inner hole of the heating cylinder;
A resin material supply device provided in communication with the resin material supply hole;
A fiber material supply hole that is eccentrically formed with respect to the center of the inner hole of the heating cylinder in front of the resin supply hole; and
And a fiber material supply device having a pushing mechanism for pushing the fiber material provided in communication with the fiber material supply hole into the inner hole of the heating cylinder. Device. 2. The fiber material according to claim 1, wherein the fiber material supply hole is provided in the heating cylinder so as to be eccentric to a side where a direction of rotation of the flight of the screw coincides with a supply direction of the fiber material. A resin material plasticizing apparatus. The resin material containing the fiber material according to claim 1 or 2, wherein a groove depth of a screw portion of a screw corresponding to the fiber material supply hole is deeper than a length of the fiber material to be supplied. Plasticizing equipment. The screw includes a feed zone, a first compression zone, a first metering zone, a pressure release zone, a second compression zone, and a second metering zone from the rear, and the fiber material supply hole includes: The resin material containing the fiber material according to any one of claims 1 to 3, wherein the resin material is provided so as to face rearward of an intermediate position in the pressure release zone or the second compression zone. Plasticizing equipment. 5. The screw according to claim 1, wherein the screw has a mixing portion in which a plurality of convex portions or a plurality of concave portions are formed in the second metering zone. An apparatus for plasticizing resin materials including fiber materials. The fiber material pushed into the inner hole of the heating cylinder from the fiber material supply device of the plasticizing device for the resin material containing the fiber material according to any one of claims 1 to 5 is a carbon fiber. A method for plasticizing a resin material including a fibrous material.