JP5941727B2 - Screw, plasticizing device, injection device, injection molding device, extruder, and method for producing molded product - Google Patents

Description

  The present invention relates to a screw, a plasticizing device, an injection device, an injection molding device, an extruder, and a method for manufacturing a molded product.

  In an injection molding apparatus, reinforcing fibers (reinforced materials) such as glass fibers, carbon fibers, and strong resin fibers are kneaded with a base material such as a resin material to improve strength and rigidity. As such an injection molding apparatus, for example, it comprises an extruding part (an extruder, a plasticizing part, a plasticizing apparatus) that melts and kneads (plasticizes) and extrudes a resin material and a reinforcing fiber and an injection part that injects a material. An apparatus including an injection device, a mold, and a mold clamping device that clamps the mold is known.

  For example, the extrusion unit is equipped with a plasticizing barrel that can accommodate the material in the internal space, a screw that rotates in the plasticizing barrel, a heater, etc., and supplies a base material such as a pellet-shaped resin material and reinforcing fibers into the plasticizing barrel. Then, by rotating the screw and heating with a heater, the base material such as a resin material is melted and kneaded with the reinforcing fiber, and extruded toward the injection part.

  The injection unit performs a weighing operation for measuring the material extruded from the extrusion unit and an injection operation for injecting a predetermined amount of material into the mold.

  In such an injection molding apparatus, a technique is provided in which reinforcing fibers are supplied into a cylinder, and the reinforcing fibers are broken by sandwiching the fibers between gears respectively provided on two-screws in the cylinder (for example, Patent Document 1). In addition, a technique is also provided in which the reinforcing fiber is placed at the downstream side and broken by shearing between the screw and the barrel (see, for example, Patent Document 2).

JP 2009-242616 A JP 2007-203638 A

  In the above-described technology for breaking by pinching between two-shaft gears or the technology for breaking with a screw, the breakage position may differ depending on the material flow or the fiber passing position, or the breakage may not be possible. For this reason, it becomes difficult to set the length of the reinforcing fiber.

  Therefore, an object of the present invention is to provide a screw, a plasticizing device, an injection device, an injection molding device, an extruder, and a method for manufacturing a molded product, which can set and adjust the cutting length of the reinforcing material. .

A screw according to an embodiment of the present invention is rotatably provided in a plasticizing barrel for kneading a base material and a continuous material. A cutter portion having a blade projecting radially outward with respect to the plasticizing barrel and having a blade cutting the continuous material by shearing, and a gap between the top of the blade and the inner surface of the plasticizing barrel Is smaller than the gap between the flight and the inner surface of the plasticized barrel .

A plasticizing apparatus according to an aspect of the present invention includes the screw, a plasticizing barrel in which a space in which the screw is disposed is formed and having a discharge unit that discharges the material, and the plasticizing barrel. A base material supply unit that supplies the base material, and a continuous material supply unit that supplies the continuous material to the upstream side of the cutter in the plasticizing barrel in the moving direction of the material. An injection molding device according to an aspect of the present invention includes the plasticizing device, a cylinder having a space communicating with the discharge unit, and an injection screw that moves in an axial direction in the cylinder to discharge a material. An injection apparatus, a mold provided on a discharge side of the injection apparatus, and a mold clamping apparatus for tightening the mold are provided.

  According to the present invention, it becomes easy to set and adjust the cutting length of the continuous material.

Explanatory drawing which shows the injection molding apparatus which concerns on 1st Embodiment. The side view which shows a part of screw of the injection molding apparatus. The perspective view which shows a part of screw of the injection molding apparatus. Explanatory drawing which shows the shape and operation | movement of the cutter part of the injection molding apparatus. Explanatory drawing which shows the injection molding apparatus which concerns on other embodiment. Explanatory drawing which shows the injection molding apparatus which concerns on other embodiment. Explanatory drawing which shows the extruder which concerns on other embodiment.

[First embodiment]
Hereinafter, an injection molding apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. In each figure, the configuration is appropriately enlarged, reduced, or omitted for explanation.

  FIG. 1 is an explanatory view of the injection molding apparatus 10, FIG. 2 is a cross-sectional view showing a part of the plasticizing apparatus 20, and FIG. 3 is a perspective view showing the configuration of the screw 24. In the figure, the arrow X indicates the distal end side of the plasticizing device 20 in the axial direction.

  The injection molding apparatus 10 is a so-called pre-plasticization type injection molding apparatus, and a material is measured and injected into a mold 50 with a plasticizing apparatus (extruding section, plasticizing section) 20 that melts, kneads and sends the material. An injection device 80 composed of an injection unit 40, a mold 50 communicating with the tip side of the injection unit 40, a mold clamping device 60 for fastening the mold 50, a control unit 70 for controlling the operation of each device, It has.

  The plasticizing apparatus 20 includes a plasticizing barrel 21, a hopper 22 as a base material supplying unit, a fiber supplying unit 23 as a continuous material supplying unit, a screw 24 arranged in the plasticizing barrel 21, and a screw 24. A screw drive unit 25 that rotates and a heater 26 that heats the material are provided.

  The plasticizing barrel 21 is formed in a cylindrical shape, and has a space 21 a in which a material is accommodated and a screw 24 is disposed. The plasticizing apparatus 20 has a single-shaft structure, and a single screw 24 is built in one cylindrical space 21 a formed inside the plasticizing barrel 21.

  A discharge portion 21 b that discharges material to the injection portion 40 is provided at the tip of the plasticizing barrel 21. A heater 26 for heating the barrel 21 is provided on the outer periphery of the plasticizing barrel 21.

  The hopper 22 is attached to the side surface of the plasticizing barrel 21. The hopper 22 stores the resin material R as a base material, and opens and closes the base material supply opening 21 c formed on the side surface of the plasticizing barrel 21 to place the pellet-shaped resin material R in the plasticizing barrel 21. throw into. The resin material R is various thermoplastic resins such as polyethylene resin, polypropylene resin, acrylic resin, or ABS resin. The resin material R is formed in a pellet form or in a state in which a continuous material is cut into a length equivalent to the pellet using a cutting device.

  The fiber supply unit 23 is attached to the side surface of the plasticizing barrel 21. The fiber supply unit 23 holds the reinforcing fiber (reinforcing material) F as a continuous material, and also supplies the reinforcing fiber F into the plasticizing barrel 21 from the opening 21d for reinforcing fiber formed on the side surface of the plasticizing barrel 21. Supply. The reinforcing fiber F is a continuous material made of a material such as carbon, glass, or aramid and configured in a ribbon shape or a tape shape. The reinforcing fiber F is fed into the plasticizing barrel 21 at a constant speed in the length direction by the fiber supply unit 23 in a state of being continuously long. Here, a case where three reinforcing fibers F that are formed by bundling a large number of fibers in a tape shape with a width of about several millimeters and a thickness of about 0.2 mm are mixed is illustrated.

  As shown in FIGS. 1 to 3, the screw 24 includes a shaft body 24 a arranged coaxially with the plasticizing barrel 21, a spiral flight 27 formed on the outer peripheral surface of the shaft body 24 a, and a shaft body 24 a. And a cutter unit 28 formed at a predetermined position.

  The shaft body 24 a has a columnar shape centered on the axis C <b> 1 and is arranged coaxially with the plasticizing barrel 21. One end side of the shaft body 24 a is connected to the drive unit 25, and is driven to rotate according to the control of the control unit 70.

  The flight 27 is a ridge formed along the spiral shape on the outer peripheral surface of the shaft body 24a, and rotates together with the shaft body 24a. The flight 27 is formed along a continuous spiral trajectory, and is formed at a position excluding the vicinity of the cutter unit 28. That is, the flight 27 is notched at the portion where the cutter portion 28 is formed, and is divided into a flight portion 27a on the distal end side in the axial direction and a flight portion 27b on the proximal end side. Here, the flight portions 27a and 27b are arranged along one spiral locus.

  The flight 27 is set so as to reach the position of the hopper 22 from the axial front end portion of the shaft body 24a, and is formed so as to reach both ends of the shaft body 24a in the axial direction. A gap G <b> 1 is formed between the edge 27 c which is the outer peripheral end of the flight 27 and the inner surface of the barrel 21. The flight 27 has a function of spirally partitioning the space between the inner surface of the barrel 21 and the outer peripheral surface of the shaft body 24a and sending the material to the distal end side in the axial direction while moving the material in the circumferential direction as the screw 24 rotates. doing.

  The cutter unit 28 is disposed at a predetermined position on the distal end side in the axial direction (downstream in the movement direction) with respect to the fiber supply unit 23. The cutter unit 28 includes a plurality of blades 31 protruding radially outward from the outer peripheral surface of the shaft body 24a of the screw 24. Here, on the outer peripheral surface of the shaft body 24a, three blades 31 are arranged at equal intervals in the circumferential direction at a pitch of 120 degrees, and a plurality of small-diameter trough portions 32 retracted radially inward between adjacent blades 31 are provided. Is formed. That is, in the cutter unit 28, the blades 31 and the valleys 32 are alternately formed in the circumferential direction.

  The blade 31 is a plate-like member orthogonal to the axial direction, and forms a top 31a that is closest to the plasticizing barrel 21 and a guide portion 33 that reaches the valley portion 32 on the front side in the rotational direction of the top 31a.

  The blade 31 stands up with respect to the axis C1 rather than the flight 27. The inclination angle θ2 between the cutter unit 28 and the axis C1 is larger than the inclination angle θ1 between the flight 27 and the axis C1, and here, θ1 = 63 degrees and θ2 = 90 degrees are set.

  The diameter of the top 31 a that is the radially outer end of the blade 31 is larger than the outer diameter of the edge 27 c of the flight 27. For example, the gap G2 formed between the blade 31 and the inner surface of the barrel 21 is set smaller than the gap G1. When the blade 31 moves in the circumferential direction by rotation, the reinforcing fiber F is cut by shearing between the top 31 a of the blade 31 and the inner surface of the barrel 21. The cutting pitch of the reinforcing fibers F, that is, the cutting length of the reinforcing fibers F is determined according to the position of the blade 31, the pitch, the rotational speed of the screw 24, and the like.

  The diameter of the valley portion 32 is the same as that of the shaft body 24 a, and a gap through which material can pass is formed between the valley portion 32 and the barrel 21. An edge portion 31b on the leading end side in the rotational direction of the top 31a of the blade 31 constitutes a tapered guide portion 33 that is gently inclined. In other words, the guide portion 33 is formed so as to be gradually displaced from the valley portion 32 so as to increase in diameter by inclining rearward in the rotational direction and radially outward. The reinforcing fiber F is guided to the position of the radially outer top 31a along the guide portion 33 by the rotation of the screw 24, so that the cutting is surely performed.

  The injection unit 40 shown in FIG. 1 has an injection cylinder 41 having a space 41a communicating with the discharge unit 21b of the plasticizing barrel 21, an injection screw 42 disposed in the injection cylinder 41, and a rotational drive that rotates the injection screw 42. A part 43, an advancing / retreating drive part 44 for moving the injection part 40 back and forth with respect to the mold, and a screw drive part 45 connected to the injection screw 42 and moving the injection screw 42 back and forth. A discharge portion 41 b communicating with the mold 50 is formed on the tip side of the injection cylinder 41. A spiral flight 43 is integrally formed on the outer peripheral surface of the injection screw 42.

  In the injection device 80, the advance / retreat drive unit 44 moves the injection unit 40 and the plasticizing device 20 forward and backward under the control of the control unit 70. In the injection unit 40, the rotation drive unit 47 is driven under the control of the control unit 70, the injection screw 42 is rotated, and the material discharged from the discharge unit 21b is sent to the distal end side of the injection screw 42. The injection screw 42 is retracted by the pressure of the material stored on the tip side of the injection screw 42, whereby a measuring operation for measuring the material accumulated on the tip side of the injection screw 42 is performed. After weighing, the screw drive unit 45 is driven under the control of the control unit 70 to move the injection screw 42 in the mold direction, thereby injecting the material in the injection cylinder 41 into the mold 50 from the discharge unit 41b at a predetermined timing. Perform injection operation.

  The mold 50 is provided on the discharge side of the injection unit 40, and includes a fixed mold 51 attached to the fixed platen 61 and a movable mold 52 attached to the movable platen 62. A cavity 53 is formed between the fixed mold 51 and the movable mold 52.

  The mold clamping device 60 includes a stationary platen 61, a movable platen 62, a toggle mechanism 64 having one end coupled to the movable platen 62, and a mold clamping drive unit 63 that drives the toggle mechanism 64 to perform mold clamping. ing. The mold clamping drive unit 63 moves the moving platen 62 through the toggle mechanism 64 under the control of the control unit 70 to open and close the mold 50 at a predetermined timing.

  Hereinafter, the operation of the injection molding apparatus according to the present embodiment will be described with reference to FIGS. 1 and 4.

  The controller 70 drives the heater 26 to heat the plasticizing barrel 21. The temperature of the plasticizing barrel 21 is detected by a temperature sensor or the like and sent to the control unit 70.

  When the temperature of the plasticizing barrel 21 reaches a predetermined value, the control unit 70 operates the hopper 22 to supply a pellet-shaped resin material, and controls the screw driving unit 25 to rotationally drive the screw 24. . Further, for example, the fiber supply unit 23 is operated at a predetermined timing when the resin material R reaches the fiber supply unit 23 to supply the reinforcing fibers F.

  With the above operation, in the plasticizing apparatus 20, the resin material R is melted and kneaded by the rotational operation of the screw 24 and the heating of the heater 26. Further, as the screw 24 rotates, the resin material R is sent to the tip end side along the spiral space partitioned by the flight 27.

  The reinforcing fiber F is drawn into the plasticizing barrel 21 by the rotating operation of the screw 24 and is sent to the tip side while being heated and kneaded together with the resin material R.

  <a> to <d> in FIG. 4 are explanatory diagrams illustrating an operation when the reinforcing fiber F passes through the cutter unit 28. The reinforcing fiber F in a continuous state is sent at a constant speed along the spiral space between the plasticizing barrel 21 and proceeds toward the tip side along the spiral space. On the other hand, the blade 31 moves in the circumferential direction at a predetermined timing according to the pitch and rotation speed of the blade 31 at a predetermined position on the downstream side of the fiber supply unit 23.

  As shown in <b> <c> of FIG. 4, when the reinforcing fiber F passes through the cutter unit 28 provided at a predetermined position on the downstream side of the fiber supply unit 23, that is, when the blade 31 crosses the reinforcing fiber F. The reinforcing fiber F is cut by shearing between the top 31 a of the blade 31 and the inner surface of the plasticizing barrel 21.

  At this time, when the reinforcing fiber F is in the valley portion 32, the reinforcing fiber F is guided radially outward along the guide portion 33 by the rotation of the screw 24 and moves toward the top 31 a. And it cut | disconnects by the shear of the top 31a and the inner surface of the barrel 21. FIG.

  In the front portion of the cutting position, the cut short piece F2 of the reinforcing fiber F moves to the tip side (backward in the figure) while being kneaded with the resin material R. Then, the plasticizer 20 pushes the melted and kneaded material from the discharge part 21 b to the injection part 40 by the rotation of the screw 24.

  On the other hand, the reinforcing fibers F in the rear portion of the cutting position are sequentially sent to the space between the valley portion 32 of the cutter portion 28 and the plasticizing barrel 21 in a continuous state. Then, it is cut again by the adjacent blade 31 passing through the position.

  Here, the plurality of blades 31 arranged at equal intervals sequentially pass through a certain reference point in the circumferential direction at regular time intervals. Therefore, the reinforcing fiber F sent to the axial front end side at a constant speed is repeatedly cut at a constant interval. Therefore, the reinforcing fiber F is cut at every fixed length (feeding amount) according to the feeding speed of the reinforcing fiber F and the passing interval of the blade 31. The cutting length of the reinforcing fiber F varies depending on the material and the strength required for the molded product, but here, for example, the length is set to ensure a length of 30 mm or more.

  The control unit 70 drives the mold clamping drive unit 63 and moves the moving platen 62 via the toggle mechanism 64 to close the mold 50.

  Next, the control unit 70 drives the advance / retreat drive unit 44 to bring the injection device 80 close to the mold, and sets the discharge unit 41 b to communicate with the cavity 53 of the mold 50.

Further, the control unit 70 measures the material in the injection cylinder 41, drives the screw driving unit 45 of the injection unit 40 at a predetermined timing based on the measurement result, and moves the injection screw 42 back and forth to move the material. An injection operation of injecting into the mold 50 is performed. When the injection operation is completed, the control unit 70 drives the mold clamping drive unit 63 to open the mold 50 and drives the advance / retreat drive unit 44 to retract the injection device 80 from the mold 50 at a predetermined timing when the molding is completed. This completes the injection molding operation in one cycle. The continuous injection molding operation includes driving the advance / retreat drive unit 44 at the start of continuous injection molding to bring the injection device 80 close to the mold 50 and communicating the discharge unit 41b with the cavity of the mold 50, and continuous injection molding. At the end of the operation, the advance / retreat drive unit 44 is driven to retract the injection device 80 from the mold 50 only once during continuous injection molding, and other operations, that is, a mold clamping operation with respect to the mold 50 The material injection operation (injection filling operation and pressure holding operation), the cooling operation (molding and solidifying operation), the mold opening operation for the mold, the removal operation of the molded product, and the material weighing operation are continuously repeated as a cycle operation. Thus, the molded products are manufactured sequentially.

  According to the present embodiment, the following effects can be obtained. That is, by providing a cutter portion 28 at a predetermined position of the screw 24 and cutting the reinforcing fiber F by shearing between the blade 31 of the cutter portion 28 and the plasticizing barrel 21, the structure is simple. The reinforcing fiber F can be cut to a desired length.

  That is, since the cutting interval of the reinforcing fiber F can be arbitrarily set according to the position of the cutter portion 28, the pitch of the blade 31, the rotational speed of the screw 24, etc., the reinforcing fiber F can be cut while securing a desired length. The strength of the molded product can be ensured.

  Further, the cutting length can be easily set and adjusted by adjusting the number of blades 31, the pitch, the installation position of the cutter unit 28, and the rotation speed of the screw 24.

  Furthermore, in the embodiment, by providing the cutter unit 28 as a mechanism for actively cutting apart from the flight 27, cutting can be performed only at a necessary and reliable place. That is, in the structure in which the spiral flight itself is cut or the structure in which it is sandwiched between the two-axis flights, depending on the flow situation, it may be cut at an unintended location or may not be cut. In addition, by providing the cutter portion 28 that stands up with respect to the axial direction and has a small gap with the plasticizing barrel 21, it is easy to set the cutting position, and the cutting can be reliably performed at a desired position.

  Furthermore, by forming the guide portion 33 that guides the reinforcing fiber F by inclining the edge portion 31b of the blade 31 of the cutter portion 28, the reinforcing fiber F is prevented from being entangled with the cutter portion 28, and the reinforcing fiber F is By guiding to the cutting position, it becomes possible to perform cutting reliably.

  That is, if the edge portion has a steep step shape instead of a tapered shape, the reinforcing fiber F is caught on the wall in front of the top and is wound around the screw, making it difficult for the material to flow and vent-up may occur. However, in this embodiment, by guiding the taper-shaped guide portion 33 from the valley portion 32 to the top 31a, the fiber can be cut quantitatively, the vent-up can be prevented, and the reinforcing fiber F can be drawn smoothly. Become.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible in the range which does not deviate from the summary of this invention. In addition, the specific configuration of each part, the specific control procedure in each process, and the like are not limited to those illustrated in the above embodiment, and can be changed as appropriate. Furthermore, the present invention can be realized even if some of the constituent features of the above-described embodiment are omitted.

  For example, in the first embodiment, an example in which the plasticizing apparatus 20 and the injection unit 40 are separately configured and connected to a so-called preliminary plasticizing type injection molding apparatus has been described. However, the present invention is not limited thereto. . For example, as shown in FIG. 5 as another embodiment, the present invention may be applied to an in-line type injection molding apparatus 110 in which the plasticizing apparatus 20 (extrusion section, plasticizing section) and the injection section 40 are integrated.

  In the injection device 111 of the in-line type injection molding device 110, the discharge portion 21b of the plasticizing device 20 is directly connected to the mold 50, the configuration of the injection portion 40 is omitted, and one of the functions of the plasticizing device 20 is achieved. It has an injection function.

  The injection molding device 110 includes an advance / retreat drive unit 29 that moves the injection device 111 forward and backward so as to be in contact with and away from the mold 50, and a screw drive unit that rotates the screw 24 (a first screw drive unit and a second screw drive unit). ) 25 and a screw drive unit (first screw drive unit, second screw drive unit) 45 that moves the screw 24 back and forth at a predetermined timing, and drives the screw drive unit 25 to rotate the screw 24. As a result, the material is fed to the distal end side of the screw 24 while being kneaded and melted in the plasticizing barrel 21, and the distal end of the screw 24 is moved backward by the pressure of the material stored on the distal end side of the screw 24. The material stored on the side is weighed, the screw drive unit 45 is driven at a predetermined timing, and the screw 24 is moved forward to perform the injection motion. It was configured to perform. In other respects, the injection device 111 of the injection molding device 110 is configured in the same manner as the plasticizing device 20 of the first embodiment. In such an in-line type injection molding apparatus 110, the same effect as that of the first embodiment can be obtained by including the plasticizing apparatus 20 having the cutter portion 28.

  Further, for example, in another embodiment, the injection unit 40a shown in FIG. 6 includes an injection cylinder 41 having a space 41a communicating with the discharge unit 21b of the plasticizing barrel 21, and an injection plunger 48 disposed in the injection cylinder 41. The forward / backward drive unit 44 moves the injection unit 40a back and forth with respect to the mold, and the plunger drive unit 49 moves the injection plunger 48 back and forth. However, in the injection part 40a shown in FIG. 6, the same part as the injection part 40 of 1st Embodiment is attached | subjected the same code | symbol. That is, in FIG. 6, only the injection unit 40a is different from the configuration of the injection unit 40 of the first embodiment described above, and other configurations (plasticizing device 20, mold 50, mold clamping device 60, control unit 70). Is the same as in the first embodiment.

  In the injection unit 40 a shown in FIG. 6, the advance / retreat drive unit 44 moves the injection unit 40 a and the plasticizing device 20 forward and backward under the control of the control unit 70. In addition, while the material discharged from the discharge portion 21b of the plasticizing apparatus 20 is stored at the tip of the injection cylinder 41, the injection plunger 48 is moved backward by the pressure of the stored material, and a measuring operation for measuring the material is performed. After metering, the plunger drive unit 49 is driven by the control of the control unit 70 to move the injection plunger 48 in the mold direction, whereby the material in the injection cylinder 41 is injected into the mold 50 from the discharge unit 41b at a predetermined timing. Perform injection operation.

  The injection unit 40a also includes the plasticizing device 20 having the cutter unit 28, so that the same effect as in the first embodiment can be obtained.

  Furthermore, for example, as shown in FIG. 7 as another embodiment, the plasticizing apparatus 20 can be applied to an extruder 120. In the extruder 120, the plasticizing apparatus 20 is configured in substantially the same manner as the plasticizing apparatus 20 of the first embodiment. In the extruder 120, a die such as a T die may be attached to the tip of the discharge portion 21b. The extruder 120 also has the same effect as that of the first embodiment by including the plasticizing device 20 having the cutter unit 28.

  In the above embodiment, the thermoplastic resin is used as the base material. However, the present invention is not limited to this. The base material may be, for example, a material such as aramid, boron, metal, ceramics, carbon, or glass. Further, the form of the base material is not limited to the pellet form, and may be other forms such as a powder form, a granular form, a chip form, and the like. Further, in the above embodiment, the reinforcing fiber is made of carbon, glass, or aramid, but is not limited thereto. As the reinforcing fiber, other materials such as boron fiber, polyethylene fiber, and xylon may be used.

  R: Resin material (base material), F: Reinforcing fiber (continuous material, reinforcing material), 10: Injection molding device, 20, 20a ... Plasticizing device (extrusion part, plasticizing part), 21 ... Plasticizing barrel, 21a ... Space, 21b ... Discharge part, 21c ... Opening, 21d ... Opening, 22 ... Hopper, 23 ... Fiber supply part (continuous material supply part), 24 ... Screw, 24a ... Shaft body, 25 ... Screw drive part, 26 ... Heater 27 ... Flight, 27c ... Edge, 28 ... Cutter, 31 ... Blade, 31a ... Top, 31b ... Edge, 32 ... Valley, 33 ... Guide, 40, 40a ... Injection, 41 ... Injection cylinder, 41a ... Space, 41b ... Discharge part, 42 ... Injection screw, 44 ... Advance / retreat drive part, 47 ... Rotation drive part, 48 ... Injection plunger, 49 ... Plunger drive part, 50 ... Mold, 51 ... Fixed type, 52 ... Movable type 53 ... Cabi 60 ... Clamping device, 61 ... Fixed platen, 62 ... Moving platen, 63 ... Clamping drive unit, 64 ... Toggle mechanism, 70 ... Control unit, 80 ... Injection device, 110 ... Injection molding device, 111 ... Injection device 120 ... Extruder.

Claims (10)

It is provided in a plasticizing barrel for kneading the base material and continuous material so as to be rotatable. The flight is spirally configured to feed the material while kneading the material by rotation, and the plastic protrudes radially outward with respect to the axis of rotation. A cutter unit having a blade that cuts a continuous material by shearing with the chemical barrel,
The screw characterized in that the gap between the top of the blade and the inner surface of the plasticizing barrel is smaller than the gap between the flight and the inner surface of the plasticizing barrel.   The screw according to claim 1, wherein an inclination angle of the blade with respect to the axis of rotation is larger than an inclination angle of the flight with respect to the axis. The screw according to claim 1 or 2,
A plasticizing barrel having a discharge portion for discharging the material while forming a space in which the screw is disposed;
A base material supply unit for supplying the base material into the plasticizing barrel;
A continuous material supply unit that supplies the continuous material to the upstream side in the movement direction of the material from the cutter unit in the plasticizing barrel;
A plasticizing apparatus comprising: A uniaxial structure comprising one screw in one plasticizing barrel,
The plasticizer according to claim 3, wherein the cutter unit includes a plurality of blades on an outer periphery, and a pitch in a rotation direction of a top of the blade corresponds to a cutting length of the continuous material. A single shaft structure with one screw in one plasticizing barrel,
A flight that is rotatably provided in a plasticizing barrel that kneads the base material and continuous material, and is configured in a spiral shape to feed the material while kneading by rotation, and
A cutter part having a blade protruding radially outward with respect to the axis of rotation and cutting a continuous material by shearing with a plasticizing barrel;
A plasticizing barrel having a discharge portion for discharging the material while forming a space in which the screw is disposed;
A base material supply unit for supplying the base material into the plasticizing barrel;
A continuous material supply unit that supplies the continuous material to the upstream side in the movement direction of the material from the cutter unit in the plasticizing barrel;
With
The cutter unit includes a plurality of blades on the outer periphery, and the pitch in the rotational direction of the top of the blade corresponds to the cutting length of the continuous material,
The front edge portion of the blade in the screw rotation direction is a tapered guide portion that continuously displaces from the valley portion retracted inward in the radial direction to the rear in the rotation direction and radially outward to reach the top. A plasticizing apparatus characterized by comprising:   Along with the rotation of the screw, the material is sent in the axial direction while melting and kneading by the flight in the plasticizing barrel, and the continuous material is cut to a length corresponding to the pitch of the blade by the cutter unit. The plasticizing apparatus according to claim 4 or 5, characterized in that:   An injection apparatus comprising the plasticizing apparatus according to any one of claims 3 to 6. An injection device according to claim 7;
A mold provided on the discharge side of the injection device;
A mold clamping device for clamping the mold;
An injection molding apparatus comprising:   An extruder comprising the plasticizing apparatus according to any one of claims 3 to 6. By plasticizing and kneading the material using a plasticizing device having a plasticizing barrel that accommodates a screw inside, the material is injected by the plasticizing device or the injection device, or is extruded by the plasticizing device. In the manufacturing method of a molded product for manufacturing a molded product,
The screw is configured to spirally cut a continuous material by shearing between a flight which is sent while kneading the material by rotation, and projecting radially outward with respect to the axis of rotation and the plasticizing barrel A cutter unit having
The gap between the top of the blade and the inner surface of the plasticizing barrel is configured to be smaller than the gap between the flight and the inner surface of the plasticizing barrel;
A method for producing a molded product, wherein the continuous material is cut into a predetermined length by the cutter unit.

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