JP2013091188A - Method of manufacturing recycled pellet and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a recycled pellet which is free from curling and is as uniform as a virgin material.SOLUTION: The method of manufacturing a recycled pellet includes steps of: twisting a supplied continuous resin material R to form a twisted paper-like string material R1; stretching the twisted paper-like string material R1 by applying tension; compressing, in a dotted shape, a twisted paper-like string stretchable material R2 stretched by a pair of compressing rollers 70 having an uneven surface formed on an outer peripheral surface; and cutting a compressed string material R3 compressed in the dotted shape at a wider interval than a concave dent to form the recycled pellets P. After the continuous resin material R is twisted into the twisted paper-like string material R1, the curl is eliminated by applying tension to the material R1 for stretching, and is cut after the compression, thereby manufacturing the recycled pellet P free from curling.

Description

  The present invention relates to a method for producing reclaimed pellets using a continuous resin material in the form of strips or threads such as cutting scraps, and an apparatus therefor.

  From the viewpoint of improving awareness of environmental issues in recent years and reducing costs, at the production site of resin products, a large amount of defective products that occur during the molding process (for example, the production preparation stage until proper standard products can be molded during trial operation) As a raw material, it is used as a raw material for a molded product in the case of, a defective product due to troubles during molding), or a cut band at the end of a film produced by balloon molding or a synthetic resin woven fabric. Reuse is generally done.

  As an example of this, for example, Patent Document 1 discloses a technique for producing recycled pellets using a continuous resin material that is a molding defect (or a loss raw material) as a recycled raw material. In this technique, a tape-like continuous resin material is formed into a string shape, which is heated and melted with an electrode roll to maintain its shape, and then the string-like continuous resin material is shortened with a cutting machine. The recycled pellets were formed by cutting into long pieces. The quality of the continuous resin material with a thin surface deteriorates due to excessive application of heat during the heat-melting (deterioration of the continuous resin material or the occurrence of scorching, etc.), which causes black spots and other quality defects in the molded product. .

  Therefore, in Patent Document 2, a little tension is applied at the time of twisting to give a twisting allowance to the continuous resin material, and the continuous resin material is twisted into a string shape, and this is compressed into a continuous dot shape with a pair of gear-shaped compression rollers. The continuous resin materials in contact with each other at the compression point were pressure-bonded, and then cut into short sizes to obtain recycled pellets. In this case, since it is not heated and melted as in Patent Document 1, there is no deterioration of the regenerated pellet due to heat, but since the twisted one is compressed, a twisted wrinkle is generated in the cord-like one, and the reproduction is cut. The torsional wrinkles also remain in the pellets.

  When these recycled pellets are supplied to the hopper of an injection molding machine, the twist density in the hopper creates a gap between the adjacent recycled pellets, and the bulk density is inevitably reduced compared to the case of using only virgin material. The problem of being disturbed occurred.

JP 49-9560 JP 2006-21519 A

  In view of such problems of the conventional example, an object of the present invention is to provide a method for producing uniform regenerated pellets and a device therefor that are free from twisting wrinkles and inferior to virgin materials.

  The invention method according to claim 1 is: “twisting the supplied continuous resin material (R) to form a twisted string material (R1), and then applying tension to the twisted string material (R1) and stretching it. Next, the stretched cord material (R2) stretched by the pair of compression rollers (71a) (71b) having irregularities formed on the outer peripheral surface is compressed into a dot shape, and then compressed into a dot shape. The compressed string material (R3) thus formed is cut to form a regenerated pellet (P) ”.

The reclaimed pellet manufacturing apparatus (A) according to claim 2 is a first apparatus (see FIG. 1) for carrying out the method of claim 1.
(2a) a material supply unit (10) that feeds out the continuous resin material (R) while guiding it;
(2b) a twist portion (50) that twists the continuous resin material (R) supplied from the material supply portion (10) to form a twisted string material (R1);
(2c) an extending portion (60) disposed downstream of the twisted portion (50) and extending the twisted string material (R1) from the twisted portion (50) by applying tension thereto;
(2d) It has a pair of compression rollers (71a) (71b) with irregularities formed on the outer peripheral surface, and the stretched string material (R2) coming out from the stretched part (60) is compressed into a dot shape to compress the compressed string material A compression section (70) forming (R3);
(2e) a cutting part (80) provided on the outlet side of the compression part (70), and cutting the compression string material (R3) to form a regenerated pellet (P);
(2f) a mechanism mounting portion (30a) to which the stretching portion (60), the compression portion (70), and the cutting portion (80) are attached;
(2g) The continuous resin material (R) fed from the material supply unit (10) so that the rotation axis (CL) is substantially parallel to the feed direction of the continuous resin material (R) from the material supply unit (10). ) Rotating around the mechanism mounting portion (30a) while guiding the rotating portion (30) to guide the extending portion (60) after reversing the feed direction of the continuous resin material (R) in the middle It is characterized by comprising.

The reclaimed pellet manufacturing apparatus (A) according to claim 3 is a second apparatus (see FIG. 10) for carrying out the method of claim 1.
(3a) a material supply unit (10) that feeds out the continuous resin material (R) while guiding it;
(3b) a twist portion (50) that rotates relative to the material supply portion (10) and twists the supplied continuous resin material (R) to form a twisted string material (R1);
(3c) an extension part (60) disposed downstream of the twisted part (50) and stretched by applying tension to the twisted string material (R1) coming out of the twisted part (50);
(3d) A pair of compression rollers (71a) and (71b) having irregularities formed on the outer peripheral surface, and the stretched cord material (R2) coming out from the stretched portion (60) is compressed into a dot shape to compress the cord A compression section (70) forming (R3);
(3e) a cutting part (80) provided on the outlet side of the compression part (70), and cutting the compressed string material (R3) formed by being compressed in a dotted shape to form a regenerated pellet (P); ,
(3f) a mechanism mounting portion (30a) to which the stretching portion (60), the compression portion (70), and the cutting portion (80) are attached;
(3g) It is characterized by comprising a rotating part (30) for rotating the mechanism mounting part (30a).

  In this recycled pellet manufacturing method and its apparatus (A), first, twist is applied to the continuous resin material (R) to form a twisted string material (R1). It will be resolved. And after compressing this to a dot shape, when it cut | disconnects to a pellet form, it can be set as the reproduction | regeneration pellet (P) without a torsion flaw.

Claim 4 is an example in which a recycled pellet discharge duct mechanism (90) is further installed in the recycled pellet production apparatus (A) according to claim 2.
(4a) a circular rotating duct (91) which is circular and is provided on the rotating part (30) and rotates coaxially with the rotating part (30), and has an outer peripheral surface (92a) and an inner peripheral surface (92b) opened;
(4b) A fixed duct (93) surrounding the outer peripheral surface (92a) of the rotating duct (91) and having an inner peripheral surface (94) facing the outer peripheral surface (92a) that the rotating duct (91) opens. ,
(4c) a cutting-side transfer duct (96) for transferring the regenerated pellet (P) from the cutting section (80) to the inner peripheral surface (92b) where the rotating duct (91) is open,
(4d) It is characterized in that it is composed of a carry-out side transfer duct (97) that moves from the rotating duct (91) and transfers the recycled pellets (P) collected by the fixed duct (93) to the outside. .

  When the duct mechanism section (90) is further installed in this way, most of the regenerated pellets (P) supplied from the cutting-side transfer duct (96) to the rotating duct (91) fall according to gravity as they are, and the fixed duct (93 ) Through the carry-out side transfer duct (97), but the rotating duct (91) rotates coaxially with the rotating part (30), so that part of the inner peripheral surface of the rotating duct (91). Is touched and jumped off. The recycled pellets (P) that have been bounced off fall into the fixed duct (93) due to the centrifugal force and weight of the rotating duct (91), and are effectively collected, and eventually all the recycled pellets (P) are collected. It is transferred to the outside through the fixed duct (93) and the carry-out side transfer duct (97).

  The fifth aspect relates to the fin (98), “at the intersection (Q) of the trajectory drawn along the fin (98) or the fin (98) and the outer peripheral opening edge in the rotational direction of the rotating duct (91). In contrast, the fin (98) is arranged so as to incline inside the rotating duct (91) '', and if the fin (98) looks like this, the rotating duct (91) Of the pellets (P) because the wind flows in the direction of the outer peripheral surface (92a) due to the rotation of the air and becomes a wind in the suction direction at the cutting part (80), and in the discharge direction on the discharge side transfer duct (97) side. Becomes smooth.

  As described above, according to the present invention, it is possible to provide uniform regenerated pellets that are free from quality deterioration due to heating, have a high apparent specific gravity, and have no twisting habits as in the prior art.

It is the front view which cut the principal part of the reproduction | regeneration pellet manufacturing apparatus of this invention, and the inside of a circle is the modification. It is II sectional drawing of FIG. It is an enlarged front view of the compression part of FIG. FIG. 4 is a side view of FIG. 3. It is a front view of the roller for compression used for this invention. FIG. 6 is a side view of FIG. 5. It is an expansion perspective view of the cutting part of the present invention. It is a partially-omission perspective view which shows a compression string body. It is a perspective view which shows a pellet. It is the front view which cut the principal part of the other example of this invention apparatus. It is a perspective view of the winding body used for this invention apparatus.

  Hereinafter, the present invention will be described in detail according to illustrated embodiments. The reclaimed pellet (P) production apparatus (A) according to the present invention has first and second embodiments, which will be described in sequence with reference to the drawings. In the description of the present invention, the first embodiment (FIGS. 1 to 7) is a representative example, and in the second embodiment (FIG. 10), common parts are omitted in order to avoid the complexity of the description, and in principle only different parts. Shall be explained.

  Although not shown, the manufacturing apparatus (A) of the first embodiment passes a cylindrical resin film formed by balloon molding between a pair of upper and lower rollers to evacuate the internal air and cut both folded ends. Then, the film body portion is wound up and the end portion (this portion becomes the continuous resin material (R)) which is cutting waste is supplied in-line as shown in FIG. In this embodiment, three continuous resin materials (R) are supplied from the three directions of upper, middle and lower. Of course, the continuous resin material (R) which is cutting waste may be separately wound up to form a continuous resin material roll (W) (see FIG. 11), and the continuous resin material (R) may be supplied using this. . When there are three or more continuous resin materials (R) to be supplied, the inner continuous resin material (R) sandwiched between the outermost continuous resin materials (R) is the outermost continuous resin material during transportation. Although not shown in the figure, it may protrude from between (R), but is crimped with a structure similar to that of the compression unit (70) described later at any part of the material supply unit (10) described later. It is preferable.

  The material of the continuous resin material (R) can be twisted and stretched, and indentations (Y) are formed in the shape of dots on the surface, and the portions forming the indentation (Y) portions are melted together. Any material can be used as long as it can be attached or adhered to maintain the twist. In this embodiment, a synthetic resin film having a thickness of 10 to 100 μm and a width of 10 to 100 mm (low density ( (Or high density) polyethylene resin) and cut parts on both sides of the fabric weaving on an automatic loom (usually called the edge of the ear, which consists of multiple warps tangled with short wefts) Is done. Of course, the present invention is not limited to these, and any material can be used as long as the above-described conditions can be achieved. Here, it is a concept including a continuous continuous material (R) such as a cut piece of synthetic resin film, and a long continuous body in which warp and weft yarns are knitted with cut waste at the end of a synthetic resin woven fabric. Call.

  Further, as shown in FIG. 8, the compression cord body (R3) is formed by twisting a twisted shape and applying tension to the stretched cord material (R2) and compressing it into a dot shape to form a concave impression ( Y) is formed. The concave shape is a concept including a substantially U-shaped, substantially V-shaped or substantially U-shaped cross section.

  As shown in FIG. 1, the manufacturing apparatus (A) includes an apparatus main body (1), a material supply section (10), a rotating section (30), a twisting section (50), an extending section (60) and a compressing section (70). And a duct mechanism (90) for collecting recycled pellets, and a mechanism for keeping the rotating frame (31) stationary in the rotating frame (31), which is the main component of the rotating part (30). A part of the extending part (60), the compressing part (70), the cutting part (80) and the duct mechanism part (90) are installed in the part (30a).

  The apparatus main body (1) is a part that becomes a skeleton of the apparatus main body (1), and includes a frame (1a) that combines steel frames and a cover (1c) that covers the rotating portion (30). The frame (1a) is formed of an elongated rod-like member (for example, a square pipe, a shape steel such as L-shaped steel or H-shaped steel).

  A vertical plate (11) of the material supply unit (10) is erected on the upper surface of the inlet side plate (3) of the frame (1a), and the introduction guide roller (12) and the introduction guide roller (12) from the inlet side. The drive roller (13), the auxiliary resin (13a) that sandwiches the continuous resin material (R) and presses it against the drive roller (13), and a position higher than the introduction guide roller (12) A pair of intermediate guide rollers (14), (16), a continuous resin material (R) that is moved up and down along a slider (18) provided in the vertical direction between the intermediate guide rollers (14), (16) ) And an exit roller which is provided below the dancer roller (15) and the intermediate guide roller (16) on the downstream side, and serves as a starting point (Nb1) for the first twist of the continuous resin material (R). Rollers such as (17) are installed on the front surface of the vertical plate (11), and the drive roller (13) is driven on the back surface of the vertical plate (11). The drive motor (19) and the rotation speed adjustment motor (20) for adjusting the rotation speed of the exit roller (17) are installed, and the rotation speed adjustment motor (20) and the exit roller (17) are endless belts. Connected at (21).

  The rotating portion (30) is spanned between a pair of left and right disc-shaped rotating plates (32a) (32b) and rotating plates (32a) (32b), and is attached to the outer peripheral edge of the rotating plates (32a) (32b). For example, three connecting pipes (33) fixed at intervals of 120 ° (of course, the number and interval are not limited) and rotating plates (32a) and (32b) are respectively installed outward from the center. The rotating frame (31) is composed of a hollow rotating shaft (34a) (34b), and the rotating shaft (34a) (34b) of the rotating frame (31) is the rotating portion support base portion of the frame (1a). The bearing blocks (4) provided at both ends are respectively supported.

  The rotary shaft (34a) on the inlet side is formed with a through hole (35a) in the middle portion, and the L-shaped inlet side connecting plate (36a) from the through hole (35a) to the nearest one connecting pipe (33a). A plurality of inlet side guide rollers (37a) to (37d) are rotatably installed in the rotating shaft (34a) and the inlet side connecting plate (36a). The first inlet side guide roller (37a) rotates with respect to the outlet roller (17) along with the rotation of the rotating shaft (34a), and becomes the first twisting end point (Ne1). During this time, the initial twist is applied to the continuous resin material (R), and the continuous resin material (R) becomes a twisted cord material (R1) with a moderate twist. The continuous resin material (R) stretched between the inlet side guide roller (37a) and the outlet roller (17) passes through the center of the rotating shaft (34a). This center is the rotation axis (CL) of the rotation frame (31). The last inlet side guide roller (37d) is disposed so as to face the inlet side opening of the connecting pipe (33a) through which the continuous resin material (R) passes and becomes the path (K), and the inlet side guide roller (37a) ) To (37d), the direction of the continuous resin material (R) is gradually changed.

  A through hole (35b) is also formed in the intermediate portion of the rotating shaft (34b) on the outlet side, and an L-shaped outlet side connecting plate (36b) from the through hole (35b) to the outlet of the connecting pipe (33a). A plurality of outlet side guide rollers (38a) to (38d) are rotatably installed in the rotating shaft (34b) and on the outlet side connecting plate (36b). The first outlet-side guide roller (38a) is disposed so as to face the outlet-side opening of the connection pipe (33a) as described above, and the connection pipe (33a) between the last outlet-side guide roller (37d) The twisted string material (R1) passing through is rotated and supported around the rotation axis (CL). The outlet side guide rollers (38a) to (38d) are reversing rollers (38) for guiding the twisted string material (R1) and reversing the feeding direction in the middle. In this embodiment, the reversing roller (38) has four exit side guide rollers (38a) to (38d) that gently change the reversing direction. Nor. The final outlet side guide roller (38d) is paired with an introduction guide roller (58) described later, the outlet side guide roller (38d) is a second twist start point (Nb2), and the introduction guide roller (58) is The second twist is applied to the continuous resin material (R) as the end point (Ne2) of the second twist. Therefore, the space from the outlet roller (17) to the inlet guide rollers (37a) to (37d), the connecting pipe (33a), the outlet side guide rollers (38a) to (38d) and the introduction guide roller (58) is twisted. Part (50).

  The mechanism mounting portion (30a) is a rectangular plate, and a circular plate (2a) is attached in a T-shape in plan view on its end surface on the rotating shaft (34a) side, and the rotating plate (32a) on the rotating shaft (34a) side Constitutes the main part of the rotating duct (91). A bearing housing (2b) is installed on the outer surface of the disk (2a) inside the rotating tact (91), and a bearing (between the rotating shaft (34a) and a hollow connecting shaft (34a1) provided coaxially. 42a) is attached, and the rotary shaft (34a) is rotatably attached. Then, the main body of one slip ring device (41) is fixed to the inner surface side of the disc (2a) attached in a stationary state with respect to the rotation shaft (34a), and the rotation shaft (41a) of the slip ring device (41) is fixed. ) Is fixed to the hollow connecting shaft (34a1) and rotates coaxially with the rotating shaft (34a).

  On the other hand, a bearing housing (2d) centered on the rotating shaft (CL) of the rotating frame (31) is installed in the notch provided at the end of the mechanism mounting portion (30a) on the rotating shaft (34b) side. This is attached to the tip portion of the rotating shaft (34b) protruding inside the rotating plate (32b) via a bearing (42b), and the mechanism mounting portion (with respect to the rotating rotating shaft (34a) (34b) ( 30a) is supported at both ends, and the mechanism mounting portion (30a) remains stationary unless an external force is applied to the mechanism mounting portion (30a) to swing it.

  The rotating shaft (40a) of the other slip ring device (40) is fixed to the opposite end of the rotating shaft (34b), and the body portion of the slip ring device (40) is erected on the frame (1a). A power supply wiring (not shown) is provided between the slip ring device (40) fixed to the mounting plate (44) and the slip ring device (41) that works as a pair with the slip ring device (40). . And the electric power for operating the below-mentioned drive motors and equipment mounted in the mechanism mounting part (30a) can be supplied via the slip ring device (41). In these slip ring devices (40) and (41), a power supply brush provided on the fixed side is in sliding contact with the slip ring on the rotation side, and power is supplied through the power supply brush and the slip ring.

  An introduction guide roller (58) serving as a terminal end of the twisted portion (50) is attached to the mechanism mounting portion (30a) that keeps the stationary state at a position facing the opening inside the rotating shaft (34b). By the last outlet side guide roller (38d) that rotates relative to the introduction guide roller (58) in a pair, a twisted shape passes between the introduction guide roller (58) and the outlet side guide roller (38d). A second twist is applied to the string (R1). Therefore, the last outlet side guide roller (38d) becomes the second twist start point (Nb2), and the introduction guide roller (58) becomes the second twist end point (Ne2). The passage path of the twisted string (R1) in this portion coincides with the rotation axis (CL) of the rotation axis (34b).

  A stretching start end roller (61) is rotatably supported immediately above the introduction guide roller (58), and the stretching end roller is disposed at a position obliquely downward from the stretching start end roller (61) and away from the stretching start end roller (61). (64) is rotatably supported. If necessary, the auxiliary guide roller (63) is rotatably supported between the stretching start roller (61) and the stretching terminal roller (64). Drive motors (62) and (65) for driving each of the stretching start end roller (61) and the stretching end roller (64) are connected via endless belts (62a) and (65a). The auxiliary guide roller (63) is provided at a position away from the straight line connecting the drawing start roller (61) and the drawing end roller (64), and is wound around the drawing start roller (61) and the drawing end roller (64). The stretched string body (R2) is provided at a position where the winding angle is appropriate. The rotational speed of the drive motors (62) and (65) can be adjusted so that appropriate stretching is applied to the stretched string (R2) passing between the two. As shown in FIG. 1 (b), it is possible to arrange the stretching start end roller (61) at this position instead of the introduction guide roller (58).

  The roller mounting plate (77) of the compression section (70) is a plate-like member formed by bending in a substantially L shape, and two pairs of rollers are mounted side by side on the front side ( 3 and 4), the pair of rollers on the front side are the compression rollers (71a) and (71b), and the pair of rollers on the rear side are the rollers for extraction (75a) and (75b).

  One compression roller (71a) (movable side) is rotatably attached to the tip of a toggle clamp (72) fixed to the roller mounting plate (77), and the other compression roller (71b) ( The fixed side is fixed to the tip of the rotating shaft of the motor (73) fixed to the roller mounting plate (77). One gear constituting the gear train (74) is attached to the middle portion of the rotating shaft. Here, when the toggle clamp (72) is tilted toward the compression roller (71b) on the fixed side, the compression roller (71a) moves toward the compression roller (71b) side, and the compression roller (71a ) And the compression roller (71b) are pressed against each other with a predetermined force.

  Each of the compression rollers (71a) and (71b) is a disk-like member having a recess formed on the outer peripheral surface thereof. In this embodiment, as shown in FIGS. Are formed by integrating a plurality of (six in this embodiment) disk-shaped members (71c) with fastening members such as screws (a little between each disk-shaped member (71c)). A gap is provided). The fixed-side compression roller (71b) is provided with stopper members (71d) having an outer diameter larger than that of the disk-like member (71c) at both axial ends thereof.

  One drawing roller (75a) (movable side) is rotatably attached to the tip of a toggle clamp (76) fixed to the roller mounting plate (77), and the other drawing roller (75b ) (Fixed side) is rotatably attached via a gear constituting a gear train (74) attached to the front side of the roller mounting plate (77). The compression roller (71b) and the drawing roller (75b) are rotated at the same angular velocity by the gear train (74) to be connected.

  When the toggle clamp (76) is tilted toward the fixed drawing roller (75b), the movable drawing roller (75a) comes close to the fixed drawing roller (75b). The distance between the drawing rollers (75a) and (75b) is such that the compression string (R3) fed from the compression rollers (71a) and (71b) can be sent downward without slack, and the compression rollers When excessive tension is applied to the compression string (R3) between the (71a) (71b) and the extraction rollers (75a) (75b), the extraction rollers (75a) (75b) and the compression string The compression cord body (R3) is appropriately set so that it does not slip and the compression string body (R3) is cut by the tension.

  Each drawing roller (75a) (75b) remains in a state where the compression string (R3) formed by the compression rollers (71a) (71b) is attached to the compression rollers (71a) (71b). It is provided so that it can be reliably sent out to the cutting part (80) without having to have a large friction coefficient with the compression cord body (R3) so that it will not slip when it is sent out, An elastic material such as urethane rubber is preferably employed. The outer diameter of the drawing rollers (75a) (75b) is set slightly larger than the outer diameter of the compression rollers (71a) (71b), and the outer circumference of each drawing roller (75a) (75b) The surface is a smooth surface.

  The cutting part (80) includes a casing (81), a cutter (82), a motor (83), and a blower (84). The cutter (82) is a substantially disk-shaped member made of a rigid material such as tool steel, and as shown in FIG. 7, a plurality of blades (82a) are formed at predetermined intervals on the outer peripheral surface thereof. . The number of blades (82a) and the interval between the blades (82a) are adjusted according to the size of the desired recycled pellet (P), the feeding speed of the compressed string (R3) and the rotation speed of the cutter (82). It is set appropriately in consideration of the above. The cutter (82) is rotationally driven by a motor (83) fixed to the casing (81).

  The casing (81) is a hollow member in which the cutter (82) is housed in a central circular hollow portion so as to be rotatable in one direction, and the cutting guide (85) is positioned in the vicinity of the drawing rollers (75a) (75b). Is installed. An arc-shaped recess (87) is formed on the cutter-side surface of the cutting guide (85) along the rotation locus of the cutter (82), and the compression string (R3) is pushed out in the center of the recess (87). A cutting hole (86) for cutting is formed. In addition, the nozzle (84a) of the blower (84) is provided in the upper part of the casing (81) so that the air blown from the blower (84) is blown into the cutter storage portion of the casing (81). It has become. A cylindrical cut-side transfer duct (96) is provided obliquely downward at the lower part of the casing (81), and its tip is provided on the disc (2a) that forms the inner wall of the rotating duct (91). Is inserted into the through hole (2e).

  The duct mechanism (90) for collecting the recycled pellets is composed of a rotating duct (91), a fixed duct (93), a cutting side transfer duct (96) and a carry-out side transfer duct (97). The rotating duct (91) constitutes the outer surface wall thereof, is attached to the rotating shaft (34a) and rotates together, and the rotating plate (32a) on the front side to which the connecting pipe (33) is attached to the outer peripheral edge, It comprises a ring-shaped inner rotating plate (32c) that is attached to the connecting pipe (33) at predetermined intervals inside the front rotating plate (32a) and at three equal intervals in this embodiment. The inner rotary plate (32c) is disposed so as to be flush with the disk (2a) disposed in the above-described fixed state and with almost no gap therebetween. Accordingly, the entire outer peripheral surface (92a) and inner peripheral surface (92b) of the rotating duct (91) composed of the rotating plate (32a) and the inner rotating plate (32c) are open.

  The regenerated pellets (P) introduced from the cutting-side transfer duct (96) between the front rotating plate (32a) serving as the outer wall and the inner rotating plate (32c) serving as the inner wall are the rotating plates (32a). In order to avoid collision with the plurality of connecting pipes (33) fixed through the inner rotating plate (32c), fins (98) are provided between them.

  The shape of the fin (98) is the rotation direction of the rotating duct (91) at the intersection (Q) between the fin (98) itself or the locus drawn along the fin (98) and the outer edge of the inner rotating plate (32a). On the other hand, the fins (98) are arranged so as to incline inside the rotary duct (91). Furthermore, the second fin (98a) provided as necessary is provided on the opposite side of the first fin (98) across the connecting pipe (33), and its starting point is the end inside the first fin (98). The end point matches the outer edge.

  The fixed duct (93) surrounds the open outer peripheral surface (92a) of the rotating duct (91), and the inner peripheral surface (94) of the fixed duct (93) facing the outer peripheral opening of the rotating duct (91) opens. It is shaped like a ring-shaped ridge, and the outer wall so that the opening width of the outer peripheral surface (92a) of the facing rotating duct (91) and the inner peripheral surface (94) of the fixed duct (93) match. The portion corresponds to the rotating plate (32a), and the inner wall portion corresponds to the inner rotating plate (2a). A discharge port (93a) that opens to the carry-out side transfer duct (97) is formed in the lower surface portion.

  The carrying-out side transfer duct (97) was collected in the storage tank (99) by a cylindrical body having one end opening connected to the discharge port (93a) and the other end opening connected to the storage tank (99). Recycled pellets (P) are sequentially taken out as needed.

  The rotating part (30) is driven by a motor (5) mounted on the frame (1a). The motor (5) is attached to the rotation shaft (5a) of the motor (5) and the pulley (8) attached to the rotation shaft (40a) of the slip ring device (40) fixed to the rotation shaft (34b). The pulley (7) is connected by an endless belt (6), and the rotation of the motor (5) is transmitted to the rotating shaft (40a).

  Next, a method for producing recycled pellets (P) using the pellet production apparatus (A) of this example will be described. When the recycled pellets (P) are manufactured using the pellet manufacturing apparatus (A), first, a string for introduction (not shown) prepared separately is supplied to a predetermined feeding path, that is, a material supply unit (10). , The inlet side guide rollers (37a) to (37d), the connecting pipe (33a) that becomes the path (K) of the rotating frame (31), the outlet side guide rollers (38a) to (38d), and the extending portion (60). Then, the tip end portion is sandwiched between the drawing rollers (75a) and (75b) of the compression portion (70), and is further passed through the cutting hole (86) of the cutting guide (85) of the cutting portion (80). Next, the end of the continuous resin material (R) supplied inline (or the continuous resin material roll (W) if not inline) is connected to the rear end of the introduction string. As for the connection method, the rear end of the introduction string is made into a ring shape, the continuous resin material (R) is passed through the ring, the ring is tightened when the introduction string is pulled, and the passed continuous resin material (R) is tied up. ,Link. The threading length is set so that the continuous resin material (R) does not come out.

  Thereafter, the device (A) is operated. When the motor (5) rotates, the rotational force of the motor (5) is transmitted via the endless belt (6) to the rotating shaft (34b) that is rotatably supported by the bearing (2), and is stationary. The rotating frame (31) rotates around the mechanism mounting portion (30a) holding the. Since the mechanism mounting part (30a) is equipped with an extending part (60), a compression part (70), a cutting part (80), one slip ring device (41), etc., naturally these also remain stationary. .

  When the material supply unit (10) is operated, the continuous resin material (R) supplied in-line (or from the continuous resin material roll (W) if not in-line) is taken up by the action of the driving roller (13), and Supply of the continuous resin material (R) to the rotating part (30) starts by the action of the exit roller (17). Adjustment of the supply speed to the rotating part (30) is performed by the line speed adjusting motor (20) in accordance with the take-up speed of the continuous resin material (R) by the rotating part (30). The imbalance between the take-up speed at the material supply section (10) and the supply speed to the rotating section (30) is absorbed by the vertical slide of the dancer roll (15), and the continuous resin material (R) is always kept at a constant tension. It will be supplied to the exit roller (17). In the exit roller (17), the winding angle of the continuous resin material (R) is 270 ° ± 30 ° C. The winding end of the exit roller (17) is the first twist starting point (Nb1) of the continuous resin material (R).

  The continuous resin material (R) exiting the first twist start point (Nb1) of the outlet roller (17) is a first inlet side guide roller (37a) provided in the rotating shaft (34a) of the rotating portion (30). The first outlet exits from the second inlet side guide roller (37b) to the fourth inlet side guide roller (37d) by changing the direction, passing through the connecting pipe (33) serving as the path (K). The 4th exit installed in the rotating shaft (34b) is passed to the 2nd and 3rd exit side guide rollers (38b) (38c) so that it may be changed over in the reverse direction. It is installed on the rotating frame (31) through the side guide roller (37d) and reaches the introduction guide roller (58) which becomes the end point (Ne2) of the second twist.

  Here, the twisted string body (R1) from the outlet roller (17) to the first inlet side guide roller (37a) and the fourth outlet side guide roller (37d) to the introduction guide roller (58). The twisted string body (R1) in the twisted state is transported so as to coincide with the rotation center of the rotation shafts (34a) and (34b). Then, the twist start which is the first twist start point (Nb1) of the outlet roller (17) by the connecting pipe (33a) which becomes the path (K) rotating around the rotation shaft (34a) (34b) as the rotation center Between the point and the end point (Ne2) of the second twist of the introduction guide roller (58), the twist of the connection pipe (33a) is applied twice for two twists. The twisting degree of the twisted string material (R1) depends on the rotation speed of the rotating frame (31) (that is, the rotation speed of the motor (5)) and the supply speed of the continuous resin material (R) (that is, the rotation of the motor (73)). It is determined appropriately according to the relationship with the speed.

  Subsequently, the twisted string body (R1) whose direction has been changed from the end point (Ne2) of the second twist of the introduction guide roller (58) reaches the stretching start roller (61) and assists in the state of being wound about 3/4. It reaches the drawing end roller (64) through the guide roller (63), and is sent out to the compression unit (70) in a state of being wound about 3/4. The auxiliary guide roller (63) is provided as necessary, and is intended to ensure a winding angle of about 3/4 winding between the stretching start end roller (61) and the stretching end roller (64). Alternatively, the introduction guide roller (58) may be eliminated, and the stretching start end roller (61) may be installed directly at this location so that the stretching start end roller (61) also serves as the introduction guide roller.

  In the stretching section (60) composed of the stretching start end roller (61) and the stretching end roller (64), the driving motors (62) and (65) are installed on the stretching start end roller (61) and the stretching end roller (64), respectively. It is designed to rotate at a pulling speed of 1.1 to 1.2 times and up to 1.5 times that of the drawing end roller (64) with respect to the drawing start roller (61), resulting in twisting wrinkles. The twisted cord body (R1) that has been stretched is strongly stretched to eliminate twisted wrinkles, and a stretched cord body (R2) without twisted wrinkles is obtained. At the same time, by this stretching, the gaps between the resin materials that are twisted and in contact with most of the portions are driven out, and the density of the stretched string (R2) is improved.

  The stretched string body (R2) that has exited the stretch termination roller (64) is sent to the compression section (70), and is compressed into a dot shape by passing through the compression rollers (71a) and (71b) to form the compressed string body (R3 ) Is formed. Since the recess is formed in the outer peripheral surface of the compression rollers (71a) (71b), when the twisted string material (R1) is compressed in a dot shape by the compression rollers (71a) (71b), Indentations (Y) are formed at predetermined intervals on the surface of the cord body (R1) according to the uneven shape of the outer peripheral surface of the compression rollers (71a) (71b), and the compression cord material is formed by the indentations (Y). Since the layers of the resin material constituting (R3) are pressed or fused to each other depending on the material, they will not swell or loosen even when cut into short dimensions thereafter.

  As described above, a recess is formed in the outer peripheral surface of the disk-shaped member (71c) constituting the compression rollers (71a) (71b), and between the disk-shaped members (71c). Since a slight gap is provided, the indentation (Y) group formed along the longitudinal direction on the surface of the compression cord body (R3) gives a design as if it were a spine.

  When the drawn string material (R2) is compressed by the compression rollers (71a) (71b), the length of the compressed string body (R3) after passing through the compression rollers (71a) (71b) is Slightly longer than the material (R2). Therefore, in this embodiment, the angular velocity of the compression roller (71b) and the extraction roller (75b) is the same as described above, so that the outer diameter of the extraction roller (75b) is set to the outside of the compression roller (71b). It is made to cope with this by setting it slightly larger than the diameter.

  The rotational speed of the drawing rollers (75a) and (75b) is set to be slightly higher than the rotational speed of the compression rollers (71a) and (71b), and the compression string body (R3) becomes the compression roller (71a). It is also possible not to loosen between (71b) and the drawing rollers (75a) (75b). Then, the compression string (R3) formed through the compression rollers (71a) (71b) is sent out to the cutting part (80) by the drawing rollers (75a) (75b).

  When the compression string (R3) fed from the drawing rollers (75a) and (75b) is led out to the cutting part (80), the compression string (R3) becomes a predetermined length by the rotation of the cutter (82). It is continuously cut, thereby forming recycled pellets (P). The length of the regenerated pellet (P) in the axial direction can be freely adjusted by appropriately adjusting the rotational speed of the cutter (82) and the feed speed of the compression string (R3).

  Then, the regenerated pellets (P) cut are blown off in the circumferential direction of the cutter (82) by the centrifugal force of the cutter (82). Since the blower (84) is installed in the cutting part (80), the wind from the blower (84) blown into the casing (81) of the cutting part (80) flows in the casing (81), and the casing ( 81) flows to the cut-side transfer duct (96) of the duct mechanism (90) connected to the lower surface opening. The regenerated pellets (P) that have been cut also flow into the cut-side transfer duct (96) along this wind. Of course, it may be collected under the apparatus (A) so as to fall by its own weight. Hereinafter, the case where it accumulates in a duct mechanism part (90) is demonstrated.

  In the duct mechanism section (90), the rotating duct (91) rotates together with the rotating frame (31) by operating simultaneously with the operation of the cutter (82). Since the through-hole (2e) of the cutting-side transfer duct (96) is located on the center side from the inner peripheral surface (91a) of the rotating duct (91), the recycled pellets that have flowed through the cutting-side transfer duct (96) ( P) is introduced into the rotating duct (91) from the inner peripheral surface (91a). Most of the recycled pellets (P) fall into the rotating duct (91) as it is, flow into the bottom side of the fixed duct (93) installed so as to surround the outer peripheral surface (92a) of the rotating duct (91), and are carried out as it is. It flows into the side transfer duct (97).

  On the other hand, a part of the regenerated pellet (P) that has flowed into the rotating duct (91) comes into contact with the inner wall of the rotating duct (91) and the fin (98) described later, and is flipped up by the impact at that time or lifted up by friction. It moves with the rotating duct (91), but at any point from the outer peripheral surface (92a) of the rotating duct (91) through the inner peripheral surface (94) of the fixed duct (93) It enters inside, falls along the inner peripheral surface of the fixed duct (93), and merges with most of the recycled pellets (P).

  Further, since the rotating duct (91) rotates together with the plurality of connecting pipes (33), the connecting pipe (33) crosses in front of the opening of the cutting-side transfer duct (96) during one rotation. However, since the fins (98) (98a) having smooth curves are provided on both sides of the connecting pipe (33), the regeneration put into the rotating duct (91) from the opening of the cutting-side transfer duct (96) The pellet (P) is guided by the fins (98) and falls. And since this fin (98) (98a) rotates with the rotating duct (91), it plays a role like a fan blade, and the recycled pellet (P) is fixed by the wind generated by the rotation of the fin (98) (98a). It is smoothly transported from the duct (93) to the carry-out side transfer duct (97).

  In the present embodiment, the carry-out side transfer duct (97) is connected to the storage tank (99), and the recycled pellets (P) are transported to the storage tank (99) by the wind and accumulated, and are transported out in a timely manner. Of course, it may be carried out directly from the carry-out side transfer duct (97).

  As can be seen from FIG. 9, the regenerated pellet (P) formed in this way forms a concave indentation (Y) on the outer peripheral surface of the laminated body in which the resin material is spirally wound by pressure bonding. It has a short size and has a density close to that of a virgin material without twisting.

  In the above-described embodiment, the rotation shafts (34a) and (34b) of the device (A) are provided so as to be in the horizontal direction, but they may be provided in the vertical direction or in an oblique direction.

  Further, the configuration of the cutting part (80) is not limited to the above-described embodiment, and although not shown, the cutter is configured so that the rotation axis of the cutter is provided in a direction substantially orthogonal to the supply direction of the compression string (R3). May be.

  FIG. 10 shows a second embodiment of the device (A) of the present invention, in which the twisted portion (50), the extending portion (60) and the compression portion (70) are mounted in the rotating portion (30), and the cutting portion (80) In this example, the continuous resin material (R) arranged outside the rotating part (30) and supplied from the material supplying part (10) is supplied straight to the twisted part (50) .In this case, the rotating part (30) One twist is made by one rotation. Therefore, the start (starting point (Nb1)) of the twist is the exit roller (17) as in the first embodiment, but the end point (Ne1) is the introduction roller (37a), followed by the stretching start roller (61). It will be. It is possible to install the stretching start roller (61) at the position of the introduction roller (37a) instead of the introduction roller (37a). The rest is the same as the first embodiment.

  In the above-described embodiment, the continuous resin material (R) is supplied in-line to the manufacturing apparatus (A) of the present invention, but the continuous resin material (R) discharged from the upstream equipment is transferred to the cylindrical shaft (X ) To form a continuous resin material wound body (W), and by setting the continuous resin material wound body (W) in the production apparatus (A) of the present invention, the continuous resin material is rolled into the production apparatus (A). The material (R) may be supplied.

(A) ... Recycled pellet manufacturing equipment
(P) ・ ・ ・ Recycled pellets
(R) ・ ・ ・ Continuous resin material
(R1) ・ ・ Coyled string material
(R2) ・ ・ Stretched string material
(R3) ・ ・ Compressed string material
(2) ・ ・ Mechanism mounting part
(10) ・ Material supply department
(30) ・ ・ Rotating part
(50) ・ ・ Torsion part
(60) ・ ・ Extension part
(70) ・ ・ Compression section
(80) ・ ・ Cutting part
(71a) (71b) ・ ・ Roller for compression

Claims (5)

  The supplied continuous resin material was twisted to form a twisted string material, then stretched by applying tension to the twisted string material, and then stretched by a pair of compression rollers having irregularities formed on the outer peripheral surface. A method for producing a regenerated pellet, comprising: compressing a twisted stretched string material into a dot shape, and then cutting the compressed string material formed by being compressed into a dot shape. A material supply unit that feeds out a continuous resin material while guiding it;
A twisted portion that twists the continuous resin material supplied from the material supply unit to form a twisted string material;
An extending portion that is disposed on the downstream side of the twisted portion and stretches the twisted string material that has come out of the twisted portion under tension, and
A compression portion having a pair of compression rollers with irregularities formed on the outer peripheral surface, and compressing the stretched string material from the stretched portion into a dotted shape to form a compressed string material;
A cutting part that is provided on the outlet side of the compression part and cuts the compression string material to form a regenerated pellet;
The continuous resin material fed from the material supply unit is arranged so that the mechanism mounting unit to which the stretching unit, compression unit and cutting unit are attached and the rotation axis are substantially parallel to the feed direction from the material supply unit of the continuous resin material. An apparatus for producing regenerated pellets, comprising: a rotating part that rotates around the mechanism mounting part while guiding, and reverses the feeding direction of the continuous resin material halfway, and then guides to the extending part. . A material supply unit that feeds out a continuous resin material while guiding it;
A twisted part that rotates relative to the material supply part and twists the supplied continuous resin material to form a twisted string material;
An extending portion that is disposed on the downstream side of the twisted portion and stretches the twisted string material that has come out of the twisted portion under tension, and
A compression portion having a pair of compression rollers with irregularities formed on the outer peripheral surface, and compressing the stretched string material from the stretched portion into a dotted shape to form a compressed string material;
A cutting part that is provided on the outlet side of the compression part and cuts the compression string material formed by being compressed in a dotted shape to form a regenerated pellet;
An apparatus for producing regenerated pellets, comprising: a mechanism mounting unit to which an extending unit, a compression unit, and a cutting unit are attached; and a rotating unit for rotating the mechanism mounting unit. A circular rotating duct that is circular and is coaxially rotated with the rotating portion and provided with an outer peripheral surface and an inner peripheral surface.
A fixed duct surrounding the outer peripheral surface of the rotating duct and having an inner peripheral surface facing the outer peripheral surface of the rotating duct that is open;
A cutting-side transfer duct for transferring the regenerated pellets from the cutting part to the inner peripheral surface of the rotating duct, and
The regenerated pellet manufacturing apparatus according to claim 2, wherein the regenerated pellet manufacturing apparatus includes a carry-out side transfer duct that transfers the regenerated pellets that have been moved from the rotating duct and collected by the fixed duct to the outside.   5. The fin is arranged so as to be inclined inward of the rotating duct with respect to the rotating direction of the rotating duct at the intersection of the fin or the locus drawn along the fin and the outer peripheral opening edge. The recycled pellet manufacturing apparatus according to 1.

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