KR101671916B1 - Apparatus of supplying a fiber to a fiber reinforced plastic compound manufacturing machine - Google Patents

Abstract

The present invention can prevent the deterioration of the quality of the product by preventing the viscosity change of the molten resin in the extruder by increasing the temperature of the supplied fiber strands by allowing the plural strands of reinforcing fibers to be supplied smoothly into the barrel The present invention relates to a fiber supply apparatus for a fiber-reinforced plastic manufacturing machine.

Description

TECHNICAL FIELD [0001] The present invention relates to a fiber-reinforced plastic compound manufacturing machine,

The present invention relates to a fiber supply apparatus for a fiber reinforced plastic manufacturing machine, in particular, to provide a plurality of strands of reinforcing fibers to be fed into a barrel without fail, and to raise the temperature of the supplied fiber strands, The present invention relates to a fiber supply device of a fiber reinforced plastic manufacturing machine which prevents deterioration of a product by preventing a change in the quality of a product.

In general, thermoplastic composites are excellent in light weight and rigidity and are used in structural components of vehicles such as bumpers and seat frames. Examples of such thermoplastic composites widely used include glass mat thermoplastics (hereinafter referred to as " GMT ") and Long Fiber-Reinforced Thermoplastic (LFT).

GMT technology is well known in the Swiss Quadrant and Azdel patents in the United States, where GMT is a laminate of glass fiber mat and resin layers in several layers and partially unidirectional reinforcement Possible features.

The technology of LFT is well known by the CPI patent of the United States, and LFT is good flow because glass fiber is cut and mixed with resin.

The synthesis of reinforcing fibers and thermoplastic resins in an extruder is known in the prior art.

In the known synthesis process of the prior art, the fibers and the resin are normally drawn into the synthetic extruder in solid state with each other. In such a composite operation, when the melting of the resin begins, the fibers are usually broken to a length of less than 0.1 inch due to the mechanical action of the extrusion screw on the fiber and the presence of the thermoplastic resin in the high-viscosity state.

Therefore, when the thermoplastic resin is initially transformed from a solid state to a liquid state, fibers are provided in the extruder. In the initial process described above, the resin is transformed from a solid to a liquid state by mechanical work and heat, and the thermoplastic resin is relatively viscous so that the fiber is broken as the resin is mixed with the fibers in the extruder.

U.S. Patent No. 4,422,992 discloses such a synthetic extruder device and process. According to the disclosure of this patent, a pair of Hanns-4 screw extruders melt the polymer initially and mix or synthesize carbon fibers or glass fibers with the molten polymer.

In the first process disclosed, the polymer and reinforcing fibers are injected into the extruder together in a feed hopper. In a second embodiment of the previously filed patent, the thermoplastic polymer is fed into a first extruded region where the polymer melts and into a second extruded region from which fibers are injected.

This process has the drawback that the fibers are drawn downstream of the thermoplastics entry point in the synthetic extruder. Therefore, the relatively low temperature fibers absorb the external heat of the molten thermoplastic resin, thereby increasing the viscosity of the resin. As a result, the thermoplastic resin causes fiber breakage during the extrusion process.

U.S. Patent No. 4,422,992 Korean Patent Publication No. 10-2006-0117677 Korean Patent Publication No. 10-2009-0099215

The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a fiber reinforced plastic manufacturing machine in which the temperature of a supplied reinforcing fiber is raised so as not to cause a change in viscosity of a relatively high- The purpose is to provide a device.

Another object of the present invention is to provide a fiber supply device of a fiber-reinforced plastic manufacturing machine in which a plurality of strands of reinforcing fibers can be smoothly supplied into a barrel.

According to an aspect of the present invention, there is provided a fiber yarn removing apparatus comprising: a fiber supply unit for drawing a fiber strand out of a plurality of fiber guide members; A resin supply extruder for melting and extruding the thermoplastic resin; An inlet barrel section provided with a first and a second extruding screw which are parallel to each other so as to be rotatable and in which a feed hole into which the fiber strand and the molten resin are introduced is formed, a cutting barrel section for cutting the fiber strand, And a mixing and extruding portion having a discharge barrel in which a resin is mixed and discharged out in a plate form,

The fiber supply unit is provided with a heater block for preheating the supplied fiber strands,
Each of the fiber strands is formed by unit fiber strands,

A plurality of guide rods guided by the fiber strands drawn out from the fiber guider and having guiding grooves formed respectively by the number of the fiber strands and being arranged at regular intervals in the vertical direction; A pair of fixed frames for supporting the movable frame so as to be movable in the left and right direction and flow means for moving the movable frame to the left and right with respect to the fixed frame,

The guide grooves formed in the respective guide rods are formed in an arc shape so that the radius of curvature of the guide grooves formed in the guide rods gradually increases as they approach the inflow barrel side from the fiber guider.
And the fiber strands are fed to the inflow barrel in a state of being spread with the unit fiber strands passing through the respective arcuate guide grooves.

The flow unit may include a guide shaft fixed between the pair of fixed frames, a guide pipe slidably coupled to the guide shaft and fixed between the pair of the flow frames, And a first motor for rotating the first rotating disk, wherein the first rotating disk is rotatably connected to an eccentric position of the other end of the rotating link.

First, by employing the heater block 110, the temperature of the supplied fiber strands is raised so as not to cause the viscosity change of the molten resin in the extruder, thereby preventing degradation of the quality of the product.

Secondly, the guide grooves 121 formed in the guide rods 120 guided by the fiber strands are formed so as to gradually increase in radius of curvature as they approach the inlet barrel portion 310 side from the fiber guider 101 The fiber strands are spread over a large area so that the fiber strands in the cutter barrel 320 can be uniformly cut and scattered in the resin so that a homogeneous strength product can be obtained.

Third, by providing a flow means for flowing the guide rods to the left and right, it is possible to improve the speed of spreading the unit fiber strands, thereby improving the operation speed of the apparatus.

1 is a schematic plan view showing a manufacturing apparatus of an embodiment of the present invention,
FIG. 2A is a schematic view of the fiber supply unit of FIG. 1,
FIG. 2B is a front view of FIG. 2A,
Figure 2c is a schematic diagram illustrating the process of fabricating a fiber strand from a plurality of roasters,
3 is a schematic view for explaining a main part of a fiber supply part,
FIG. 4 is a plan view of the mixing extrusion of FIG. 1,
Figure 5 is a schematic cross-sectional view of Figure 4,
6A is a schematic view showing the first and second extrusion screws housed in the cutting barrel portion,
FIG. 6B is a schematic view for explaining the assembly angle of the unit screws of FIG. 6A,
7A and 7B are schematic views for explaining the means for adjusting the thickness of the extrudate,
7C is a side view showing a state in which a scraper is mounted on the discharge barrel die,
Figure 7d is a schematic right side view of Figure 7c,
7E is a schematic view showing a scraper,
8 is a schematic plan view showing a discharge conveyor,
9 is a schematic view showing a cutting portion,
Figure 10 is a schematic side view of Figure 8,
11 is a schematic view showing the main part of the discharge conveyor,
12A and 12B are schematic diagrams for explaining the operation state of the discharge conveyor;

The fiber feeding device of the fiber reinforced plastic manufacturing machine of the present invention enables a plurality of strands of reinforcing fibers to be supplied smoothly into the barrel and raises the temperature of the fiber strands fed to cause the viscosity change of the molten resin in the extruder So that the quality of the product can be prevented from deteriorating.

Referring to Figs. 1 to 5, an apparatus for producing a fiber-reinforced plastic compound employing the fiber supply device of the embodiment of the present invention comprises a fiber supply portion 100 for drawing fiber strands out of a plurality of fiber guiders 101; A resin supply extruding part (200) for melting and extruding a thermoplastic resin; An inlet barrel 310 in which first and second extrusion screws 301 and 302 parallel to each other are rotatably provided and in which a supply hole 311 through which the fiber strand and the molten resin are introduced is formed; And a discharge barrel part (330) having a discharge port (331) through which the cut fiber strand and the molten resin are mixed and discharged in a plate form; A cutting portion 400 for cutting the extrudate (fiber reinforced plastic compound) 600 discharged on the plate to a desired length; And a discharge conveyor part (500) for discharging the cut extrudate (600).

Referring to FIGS. 2 and 3, the fiber supply unit 100 includes a heater block 110 for preheating the supplied fiber strands 101a.

The heater block 110 is heated to a predetermined temperature from the resin supply extruding portion 200 to preheat the fiber strands 101a supplied to the inlet barrel portion 310 and the temperature of the resin supplied to the inlet barrel portion 310 Deterioration and viscosity change of the extrudate (600) can be prevented so as to prevent deterioration of the quality of the extrudate (600).

The fiber supply unit 100 includes a plurality of fiber guiders 101 wound with fiber strands 101a and a plurality of fiber strands 101a guided out from the fiber guider 101, A plurality of guide rods 120 each having a guide groove 121 and spaced apart at a predetermined interval from each other, a pair of flow frames 130 to which both ends of the guide rods 120 are fixed, A pair of fixed frames 140 for supporting the flow frame 130 so as to be movable left and right and flow means for flowing the flow frame 130 left and right with respect to the fixed frame 140.

3, the guide grooves 121 formed in the respective guide rods 120 are formed in an arc shape. As the guide grooves 121 approach the inflow barrel portion 310 side from the fiber guider 101, The radius of curvature of the guide groove 121 formed in the rod 120 is gradually increased.

Referring to FIG. 2C, each of the fiber strands 101a is formed by bundling unit fiber strands (rood yarns) 101b through dozens of winding devices 105 and passing through each arcuate guide groove 121, The fiber strands 101b are unfolded or unfolded and fed to the inlet barrel 310 side.

Accordingly, the fiber strands in the cutter barrel 320, which will be described later, can be cut smoothly and scattered in the resin so as to obtain a homogeneous strength product.

2B, the flow unit includes a guide shaft 150 fixed between the pair of fixed frames 140, a guide shaft 150 slidably coupled to the guide shaft 150, A rotation link 161 whose one end is rotatably coupled to the flow frame 130 and a second link 151 which is rotatably connected to the other end of the rotation link 161 at an eccentric position, A rotating disk 162 and a first motor 160 for rotating the first rotating disk 162.

The first motor 160 rotates the first rotary disc 162 and the rotating link 161 reciprocates to swing the flow frame 130 to the left and right to be guided along the guide groove 121 So that each of the fiber strands 101a can be uniformly spread to the unit fiber strands 101b.

4 to 6, the cutting barrel 320 includes a large diameter portion 321 extending from the inlet barrel 310 and a small diameter portion 322 having a diameter smaller than that of the large diameter portion 321 And a stepped step 325 is formed at a boundary between the large diameter part 321 and the small diameter part 322. The resin and the fiber strand 101a are pressed by the first and second extrusion screws 301 and 302, The fiber strand 101a is primarily cut when passing through the step jaw 325 in which the diameter is narrowed.

5 and 6, the first and second extrusion screws 301 and 302 disposed in the cutter barrel 320 include a plurality of unit screws 301a and 301b (302a and 302b) And the spacer rings 341 and 342 are interposed between the unit screws 301a and 301b (302a and 302b).

The unit screws 301a and the unit screws 301b on both sides of the spacer 342 are formed by crossing the screw inclination angle of 90 degrees as shown in FIG.

The first and second extrusion screws 301 and 302 having such a structure are formed such that the resin and the fiber strand 101a are transported along the screw cores in the direction of the arrow (see FIG. 6A), and the portions of the spacers 341 and 342 The fiber strand 101a is secondarily cut by the screw blades 301c and 302c while the transfer path of the resin and the fiber strand 101a is changed.

A thickness adjusting means for adjusting the thickness of the extruded material 600, which is mixed with the fiber strand 101a and the molten resin, is disposed at the end of the discharge barrel 330.

7A and 7B, the thickness adjusting means 700 includes a first position for pivotally connecting the discharge barrel die 330a and closing the discharge port 331, and a second position for closing the discharge port 331 A cylinder 720 connected to the pivot block 710 to pivot the pivot block 710, and a second piston 710 connected to the first position and the second position, And a control unit 730 for controlling the cylinder 720 so that the rotation block 710 is rotated.

And a width detection sensor 740 for detecting the amount of opening of the discharge port 331 is provided on the rotating block 710 side. The width detection sensor 740 senses the amount of opening of the discharge port 331 when the cylinder 720 is operated according to the opening amount of the discharge port 331 set in the control unit 730.

7C to 7E, a side wall of the discharge barrel die 330a is provided with a scraper 750 sliding on an edge of an outlet of the discharge port 331, an operation cylinder (not shown) for reciprocating the scraper 750, So that the scraper 750 can remove the resin adhered to the outlet side edge of the resin discharge port 331 of the resin.

In this case, it is possible to prevent deformation of the surface shape of the extruded material extruded through the discharge port 331 due to the resin fixed to the outlet side edge of the discharge port 331.

The rotation angle of the rotating block 710 is controlled by the controller 730 according to the supply speed of the resin and the fiber strand 101a and the rotational speed of the first and second extrusion screws 301 and 302 .

8 and 9, the cutting unit 400 includes a stationary frame 410 disposed close to the discharge port 331, a cutting motor (not shown) fixed to the stationary frame 410 and generating power A second rotating disk 430 rotatably supported on the fixed frame 410 and rotated by the power of the cutting motor 420 and a second rotating disk 430 having one end rotatably supported on the eccentric position of the second rotating disk 430, And a cutting blade 451 for cutting the extrudate 600. One end of the cutting blade 451 is rotatably supported on the fixed frame 410 and the other end of the cutting blade 451 is connected to the connection link 440 And a cutting block 450 rotatably connected to the other end of the cutting block 450.

The cutting unit 400 cuts the extrudate 600 to be cut through the fixed conveyor 800 by a predetermined length while the cutting block 450 is rotated around the hinge shaft 452.

8, 10 and 11, the discharge conveyor unit 500 is constructed as follows.

The first conveyor 511 and the second conveyor 512 are mounted on one rotating frame 510 and are circulated in an endless track.

12A and 12B, when the pivot frame 510 is pivoted, the pivot frame 510 is pivoted about the pivot shaft 501 disposed at one side, The conveyor 511 and the other end of the second conveyor 512 are alternately positioned at a position close to the cut portion 400 so that the extrudate 600 cut from the cut portion 400 is conveyed to the first conveyor 511 And the second conveyor 512, as shown in FIG.

The pivoting means includes a link member 520 having one end rotatably connected to the other end of the pivoting frame 510 and a third rotatable member 520 rotatably connected to the other end of the link member 520, A disk 530, and a tilting motor 540 for rotating the third rotating disk 530.

The discharge conveyor unit 500 having the above-described structure allows the extrudate 600 to be discharged to the first conveyor 511 and the second conveyor 512 alternately, thereby enabling continuous production.

100 ... fiber supply part 110 ... heater block
200 ... resin supply extrusion part 300 ... mixed extrusion part
301, 302 ... 1st and 2nd extrusion screws 310 ... inlet barrel section
320 ... cutting barrel portion 330 ... discharge barrel portion
400 ... cutting portion 500 ... discharging conveyor portion
600 ... extrudate

Claims (4)

A fiber supply unit for drawing fiber strands out of the plurality of fiber guide members; A resin supply extruder for melting and extruding the thermoplastic resin; An inlet barrel section provided with a first and a second extruding screw which are parallel to each other so as to be rotatable and in which a feed hole into which the fiber strand and the molten resin are introduced is formed, a cutting barrel section for cutting the fiber strand, And a mixing and extruding portion having a discharge barrel in which a resin is mixed and discharged out in a plate form,
The fiber supply part 100 is provided with a heater block 110 for preheating the supplied fiber strands 101a,
Each of the fiber strands 101a is formed by unit fiber strands 101b,
The fiber supply unit 100 includes a plurality of fiber guiders 101 wound with fiber strands 101a and a plurality of fiber strands 101a guided out from the fiber guider 101, A plurality of guide rods 120 each having a guide groove 121 and spaced apart at a predetermined interval from each other, a pair of flow frames 130 to which both ends of the guide rods 120 are fixed, And a flow unit for flowing the flow frame 130 left and right relative to the stationary frame 140. The pair of stationary frames 140,
The guide grooves 121 formed in the respective guide rods 120 are formed in an arc shape and are formed in the guide rods 120 as they approach the inlet barrel portion 310 side from the fiber guider 101 The radius of curvature of the guide groove 121 gradually increases,
Wherein the fiber strands 101a are fed to the inlet barrel 310 in a state of being spread with the unit fiber strands 101b while passing through the arcuate guide grooves 121. [ Of the fiber supply device. delete delete The apparatus according to claim 1, wherein the flow unit includes a guide shaft (150) fixed between the pair of fixed frames (140), and a guide shaft (150) slidably coupled to the guide shaft A rotation link 161 whose one end is rotatably coupled to the flow frame 130 and a second rotation which is rotatably connected to the other end of the rotation link 161 at an eccentric position, And a first motor (160) for rotating the first rotating disk (162). The apparatus of claim 1, wherein the first motor (160) rotates the first rotating disk (162).

Images