JP2012081605A - Method and device for manufacturing regenerated resin pellet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for manufacturing a regenerated pellet capable of forming a very high-quality resin regeneration pellet hardly causing a dishevelled state regardless of the thickness and the number of loss films to be input.SOLUTION: In this method for manufacturing a regenerated pellet, one or more synthetic resin loss films F are twisted to form a spill-like string material K, the spill-like string material K is point-compressed to form a string material S with recessed indentations, and regenerated resin pellets P are formed by cutting the string material S with recessed indentations at intervals each including one or more recessed indentations Y. In the method for manufacturing a regenerated resin pellet, stretching force is imparted to the one or more loss films F to be thinly stretched, and the spill-like string material K is formed by twisting the thin stretched films f after the stretching.

Description

  The present invention is, for example, a cylindrical shape manufactured by inflation molding, and is sandwiched between upper and lower take-up rollers so as to be doubled. The present invention relates to a method for producing recycled resin pellets using a loss film (for example, a double film that has been broken in the middle or broken in the middle) as a raw material, and an improvement in the apparatus.

  A large amount of loss film F (a long, wide edge and product loss) generated in the manufacturing process of resin films and the like is processed and used as recycled resin pellets (hereinafter simply referred to as “recycled pellets”). It has been widely performed. In addition, when the loss film is heated and melted for manufacturing recycled pellets, the quality of the resin is deteriorated, and thus a technique capable of manufacturing recycled pellets without heating has been demanded.

  For example, Patent Document 1 is known as an example of a recycled pellet manufacturing apparatus capable of manufacturing recycled pellets without heating.

  This conventional recycled pellet manufacturing apparatus includes a pair of concentrating rollers for narrowly bundling a plurality of drawn loss films having a certain width, a pair of compression rollers having irregularities formed on the surface, and a cutting roller. A cutter is provided, and the focusing roller and the compression roller are configured to be relatively rotatable.

  When producing recycled pellets in a conventional recycled pellet manufacturing apparatus, the compression roller is rotated relative to the focusing roller while the loss film is passed through the focusing roller and the compression roller in this order. Then, the loss film is twisted between the condensing roller and the compression roller to form a twisted string, and the twisted string is compressed by the compression roller, whereby the string material having a concave indentation formed on the surface thereof. Will be formed. It is said that by cutting this string material at intervals wider than the concave indentation, it is possible to obtain high-quality recycled pellets having a high specific gravity and a uniform particle size without heating.

Japanese Patent No. 4403004

  In the case of a conventional recycled pellet manufacturing apparatus, even if there is only one piece, if the loss film that is the raw material is thick, or if more than the expected number of loss films are thrown in, the apparent specific gravity of the obtained recycled pellets is reduced, There was a problem that it was easy to unravel and the utility value as a regenerated pellet was greatly reduced. That is, in these cases, the twisted string obtained by twisting becomes too thick, and the concave impression formed on the surface of the twisted string does not reach the center of the twisted string. If the concave indentation does not reach the center of the twisted string, the film will be insufficiently crimped by the concave impression (particularly at the center of the twisted string), and the regenerated pellets obtained by cutting this will be easy to break, As a result, air appears and the apparent specific gravity also decreases.

  Of course, if the compression force by the compression roller is increased, the above problem can be solved to some extent. However, since it is necessary to apply a high load to the compression roller, the size and cost of the apparatus are increased. The result is connected.

  Therefore, an object of the present invention is to provide a method for producing recycled pellets capable of forming very high-quality recycled resin pellets that are difficult to unravel and have a high bulk density regardless of the thickness and number of loss films to be input. As well as an apparatus for manufacturing the same.

The invention described in claim 1 (first to third embodiments)
(1a) Stretching unit 14 that stretches one or more synthetic resin-made loss films F that are continuously supplied, and sends the stretched thin stretched film f to a pair of compression rollers 52a and 52b disposed on the downstream side; ,
(1b) It has the pair of compression rollers 52a and 52b disposed on the downstream side of the stretching portion 14 and has irregularities formed on the outer peripheral surface thereof, and rotates relative to the stretching portion 14 to stretch the stretching portion. 14, a twisted string material K formed by twisting the thin stretched film f by the compression rollers 52a and 52b at the same time as twisting is applied to the thin stretched film f taken from 14, and the string material S with the concave impression Y is compressed. A rotary compression unit 20 that forms
(1c) Recycled pellets that are provided on the outlet side of the rotary compression unit 20 and that include a cutting unit 22 that cuts the cord material S with the concave indentation at intervals including at least one concave indentation Y. P manufacturing apparatuses 10A to 10C.

The invention described in claim 2 further restricts the extending portion 14 (see FIG. 2 (a) in the first embodiment).
(2a) An upstream roller 28 on the entrance side from which the introduced loss film F and the thin stretched film f drawn out from the wound state and started to be stretched by the tension applied in this state are fed out in an intersecting state, and
(2b) A thin stretched film disposed downstream of the upstream roller 28 and spaced apart from the upstream roller 28 and rotated at a higher speed than the upstream roller 28 and introduced from the upstream roller 28 in a stretched state. A thin stretched film f fed to the downstream rotary compression unit 20 after being wound is formed by an outlet-side downstream roller 30 that is fed out in an intersecting state.

The invention described in claim 3 further includes an intermediate roller 32 in the extending portion 14 (see FIG. 2 (b) in the second embodiment).
(3a) An upstream roller 28 on the entrance side from which the introduced loss film F and the thin stretched film f drawn out from the wound state and started to be stretched by the tension applied in this state are fed out in an intersecting state;
(3b) A thin stretched film f that is arranged on the downstream side of the upstream roller 28 and spaced from the upstream roller 28, rotates at a higher speed than the upstream roller 28, and is introduced from the upstream roller 28 in a stretched state. And a downstream roller 30 on the outlet side from which the thin stretched film f supplied to the downstream rotary compression unit 20 is fed in an intersecting state after being wound, and
(3c) The thin film stretched from the upstream roller 28, suspended between the upstream roller 28 and the downstream roller 30, suspended from the upstream roller 28 and suspended from the upstream roller 28. It is characterized in that it is formed by an intermediate roller 32 arranged at a position where the inner angle δ between the film f and the thin stretched film f fed to the downstream roller 30 is smaller than 180 °.

  The invention described in claim 4 is characterized in that the stretching is performed up to the compression rollers 52a and 52b, and the take-up speed of the compression rollers 52a and 52b is made faster than the feeding speed of the thin stretched film f from the stretching portion 14. To do.

According to the fifth aspect of the present invention, the power supply slip ring 132 is eliminated from the second to third embodiments shown in FIGS. In the embodiment (FIGS. 5 to 10) of the rotary compression unit 20 that fixes and transmits the rotational force to the compression roller 52b of the rotary compression unit 20, the rotary compression unit 20
(5a) a rotating cylinder portion 42 rotatably attached to the apparatus body 24 and through which the stretched thin stretched film K passes while being twisted;
(5b) a compression unit rotating motor 44 that is fixed to the apparatus main body 24 and rotationally drives the rotary cylinder unit 42;
(5c) a compression unit 18 provided at the outlet of the rotary cylinder part 42, having compression rollers 52a and 52b for pressing and pressing the twisted thin stretched film K, which rotates together with the rotary cylinder part 42;
(5d) A main transmission gear outer cylinder portion 88 rotatably attached to the outer periphery of the rotary cylinder portion 42, a compression portion drive transmission gear meshed with the main transmission gear outer cylinder portion 88 and rotatably attached to the apparatus main body 24 Part 86, which is rotatably attached to the apparatus main body 24, meshes with a compression part drive motor 92 which rotates the compression part drive transmission gear part 86, and a main transmission gear outer cylinder part 88, and of the compression part drive transmission gear part 86. The driven transmission gear train 90 transmits the rotation to the compression roller 52b.

The invention described in claim 6 is the invention described in claims 1-4, further comprising a compression force adjusting mechanism 40 (FIG. 8) for adjusting the compression force of the compression rollers 52a, 52b of the rotary compression unit 20. In addition, the rotary compression unit 20
(6a) A rotating cylinder portion 42 rotatably attached to the apparatus body 24 and through which the stretched thin stretched film K passes while being twisted;
(6b) a compression unit rotating motor 44 that is fixed to the apparatus body 24 and rotationally drives the rotary cylinder unit 42;
(6b) The compression unit 18 provided at the outlet of the rotary cylinder part 42, having the compression rollers 52a and 52b for holding and pressing the twisted thin stretched film K rotated with the rotary cylinder part 42,
(6c) Attached to the outer periphery of the rotating cylinder part 42 so as to be reciprocally slidable in the axial direction, and is attached to the outer periphery of the reciprocating cylinder part 96 that rotates together with the rotating cylinder part 42 and the outer periphery of the cylinder part 96 that is reciprocally moved, A gear is engraved on the outer peripheral surface and meshes with the main transmission gear outer cylinder portion 88 that reciprocates in the axial direction together with the cylinder portion 96 during the reciprocating movement. A compression portion drive transmission gear portion 86 attached to the rotary portion, and a compression portion drive motor 92 and a main transmission gear outer cylinder portion 88 that are rotatably attached to the rotary compression portion attachment portion 24a and drive the rotation of the compression portion drive transmission gear portion 86. A driven transmission gear train 90 that transmits the rotation of the compression portion drive transmission gear portion 86 to the compression roller 52b.
(6d) It is rotatably attached to the apparatus main body 24, is rotatably provided on the outer periphery of the reciprocating cylinder section 96, and is guided by the guide mechanism 100 provided in the apparatus main body 24 together with the reciprocating cylinder section 96. A compression force adjusting screw portion 98 that is screwed into a female screw hole 108 provided in the outer casing 106 that reciprocates and reciprocates the cylinder portion 96 in the axial direction of the rotating cylinder portion 42;
(6e) An axial reciprocating drive motor 104 attached to the apparatus main body 24 and rotationally driving the compression force adjusting screw portion 98;
(6f) A roller elastic support portion that is provided on the holding member 56 of the compression portion 18 that rotatably supports the compression rollers 52a and 52b and supports the other compression roller 52a in the elastic contact direction with respect to the one compression roller 52b. 35,
(6g) It is fixed to the cylinder part 96 during the reciprocating movement, and is configured by a resilience adjusting part 102 that changes the elasticity of the roller elastic support part 35 in accordance with the axial movement of the cylinder part 96 during the reciprocating movement. It is characterized by that.

Invention of Claim 7 is the manufacturing method of the reproduction | regeneration pellet in said apparatus 10A-10C,
One or a plurality of synthetic resin loss films F are twisted to form a twisted string material K, the twisted string material K is point-compressed to form a string material S with a concave impression, and a string material S with a concave impression. In the manufacturing method of the regenerated pellets that form the regenerated resin pellets P by cutting at intervals including at least one concave indentation Y,
A method for producing recycled pellets P, characterized in that one or a plurality of loss films F is stretched thinly by applying a stretching force, and twisted thin stretched film f is formed to form twisted string material K. is there.

  In the invention described in claim 8, the stretching is performed up to the compression rollers 52a and 52b beyond the stretching section 14, and in the twisting process of the thin stretched film f, the thin stretched film f is twisted while being further stretched. A recycle pellet manufacturing method characterized in that a twisted string material K is formed.

  According to these inventions, the lossy film F is stretched thinly and the thin stretched film f after stretching is twisted to form the twisted string material K, so that it is thicker than expected or wider than expected. Even when a wide loss film F or more than a predetermined number of loss films F are used, the twisted string material K obtained by twisting does not become extremely thick. In this respect, as shown in claim 4, when the stretching is continued beyond the stretching portion to the compression rollers 52a and 52b, the twisted string material K is twisted more strongly. (This is a strong twisted twisted string material. Although it is twisted more strongly than the twist of the stretched portion 14 alone, the two are only different in torsion, so the same K is used unless otherwise noted.) Therefore, it is possible to form the concave indentation Y up to the center of the twisted string material K without increasing the size of the devices 10A to 10C, and to produce a very high quality recycled resin pellet P that has a high bulk density and is difficult to unravel. It becomes possible to form. In the case of strong twisting, the bulk density is higher and it is more difficult to unwind.

  At this time, as shown in claim 2, in the upstream roller 28 and the downstream roller 30, the loss film F and the thin stretched film f are crossed to be stretched while being continuously fed. In addition, the loss film F and the thin stretched film f wound around the intersecting upstream roller 28 and downstream roller 30 are attracted to the center of the upstream roller 28 and downstream roller 30 while rubbing against each other, and the upstream roller 28 And the downstream roller 30 does not fall off.

  Further, as shown in claim 3, when the intermediate roller 32 is further provided in the extending portion 14, in addition to the drawing action of the thin stretched film f, the thin stretched film exiting from the upstream roller 28 depending on the set position of the intermediate roller 32 The inner angle δ between f and the thin stretched film f sent to the downstream roller 30 can be adjusted, whereby the wrapping contact angle of the loss film F and the thin stretched film f with respect to the upstream roller 28 and the downstream roller 30 can be adjusted. In other words, the amount of stretching can be adjusted by adjusting the slip amount of the loss film F and the thin stretched film f with respect to the upstream roller 28 and the downstream roller 30 under the continuous feed state in the stretched state. In this case, it is preferable that the position of the intermediate roller 32 can be adjusted by elastic support (in a tension roller state).

  According to the fifth and sixth aspects of the present invention, the rotational drive source of the compression rollers 52a and 52b of the rotary compression unit 20 and the compression unit 18 and the drive source of the compression force adjusting mechanism are used as the device main body 24 (in this embodiment, the device main body 24). Since it is attached to a part of the rotational compression part attaching part 24a) and only the rotational force is transmitted by the gear mechanism, the slip ring 132 for power supply which is easily damaged can be eliminated.

  Then, as shown in claim 6, the roller elastic support portion 35 supports the other compression roller 52a in the elastic contact direction with respect to the one compression roller 52b, and is fixed to the cylindrical portion 96 during the reciprocation, and is reciprocating. Since the elastic force adjusting unit 102 changes the elastic force of the roller elastic support portion 35 in accordance with the axial movement of the cylindrical portion 96, the compressive force is adjusted in accordance with the thickness of the supplied twisted string material K. Therefore, the quality of the cut recycled pellets P can be stabilized.

It is a figure which shows the reproduction | regeneration pellet manufacturing apparatus of 1st Example of this invention. (a) 1st Example of the extending | stretching part applied to this invention, (b) It is a figure which shows the 2nd Example. It is a perspective view which shows the reproduction | regeneration pellet formed with this apparatus. It is A-A 'sectional drawing of FIG. FIG. 5 is a B-B ′ cross-sectional view of FIG. 4. It is C-C 'sectional drawing of FIG. It is a perspective view which shows the principal part in the reproduction | regeneration pellet manufacturing apparatus of 1st Example of this invention. It is a perspective view from the back which shows the compression part of 1st Example of this invention. It is D-D 'sectional drawing of FIG. It is a figure which shows the cutting part of 1st Example of this invention. It is a schematic front view which shows the reproduction | regeneration pellet manufacturing apparatus of 2nd Example of this invention. It is a schematic front view which shows the reproduction | regeneration pellet manufacturing apparatus of 3rd Example of this invention.

  Since the method for producing recycled resin pellets P (hereinafter simply referred to as “recycled pellets”) according to the present invention is realized using the recycled pellet manufacturing apparatuses 10A to 10C shown in FIG. 1, FIG. 11 or FIG. Hereinafter, the regenerated pellet manufacturing apparatus 10A (Example 1 in FIG. 1) will be described first, and then a method for manufacturing the regenerated pellet will be described. The recycled pellet manufacturing apparatus 10B will be briefly described in (Example 2), and the recycled pellet manufacturing apparatus 10C will be briefly described in (Example 3). Portions having the same function between the embodiments are denoted by the same reference numerals.

  The motors used in the present invention may be a motor with a transmission, but an inverter motor, a servo motor, or a stepping motor is mainly used to facilitate speed control. As the belts, a timing belt is used in order to accurately transmit the rotation.

  As shown in FIG. 1, the regenerated pellet manufacturing apparatus 10 </ b> A of the first embodiment manufactures a regenerated pellet P using a synthetic resinous loss film F as a material. Here, the loss film F as the raw material and the recycled pellet P as the target will be briefly described. The loss film F can be twisted and has a concave indentation Y ( 3), and the portion forming the indentation Y portion may be anything as long as the portions can be crimped together to maintain the twist. For example, a large amount of loss film F (for example, low density polyethylene resin or high density polyethylene resin) having a thickness of 10 to 100 μm and a width of 10 to 100 mm, or an automatic loom generated in the process of manufacturing a resin film or the like as described in the examples Usually, a portion called an ear end is used, such as a cut portion on both ends of a cloth using a synthetic resin yarn woven in (a short weft entangled with a plurality of warps). In addition, defective products and non-standard products generated at the film production site are also covered.

  As a method for supplying the loss film F to the recycled pellet manufacturing apparatus 10A, for example, the loss film F is pre-rolled around a cylindrical shaft (not shown) to form a cartridge, and this is supplied to the recycled pellet manufacturing apparatus 10A. There is a method of supplying a loss film F as a waste product, such as an ear tip, discharged from the apparatus directly in-line to the apparatus 10A (in this embodiment, the latter method is employed).

  The recycled pellets P (see FIG. 3) are obtained by twisting the loss film F in a twisted shape, and forming the string material S obtained by forming the concave indentations Y on the surface thereof at an interval wider than at least the interval of the concave indentations Y. It can be formed by cutting at intervals including one or more concave indentations Y (the size of the concave indentations Y included is sufficient if the recycled pellets P cannot be unraveled). Note that the “concave shape” is a concept including a point-like surface shape and a vertical cross section including a substantially U shape, a substantially V shape, a substantially U shape, and the like.

  As shown in FIG. 1, the recycled pellet manufacturing apparatus 10 </ b> A includes a rotary compression unit provided with a loss film supply unit 12, a stretching unit 14, a rotation unit 16 described later, and a compression unit 18 following the rotation unit 16 from the upstream side. 20, the cutting part 22 and the apparatus main body 24 which supports these are comprised roughly.

  The loss film supply unit 12 supplies the loss film F to the downstream stretching unit 14, and a pair of fixed rolls 26a and 26b are installed in the apparatus main body 24 at a predetermined interval, and the fixed roll 26a , 26b, for example, can be moved up and down on the vertical pole 26d so as to be close to and away from the fixed rolls 26a and 26b under a load such as a spring or a weight (in FIG. 1, it can be moved up and down). The dancer roll 26c is disposed, and applies a constant tension to the loss film F that is continuously conveyed by being stretched between the fixed rolls 26a and 26b.

  The supplied loss film F has an appropriate width, thickness, such as a plurality of appropriate loss films F, or even a single loss film F that is wider or thicker than expected. There are various things from the number etc. to those exceeding the planned number range.

  The stretching unit 14 is a portion that applies a strong tensile force to the raw material loss film F to thinly stretch the loss film F and send it to the lower process as a thin stretched film f, and is provided downstream of the loss film supply unit 12. Yes.

  As shown in FIG. 2 (a), the first embodiment of the extending portion 14 is rotatably attached to the apparatus main body 24 (see FIG. 1), and an upstream roller 28 serving as a starting point of the extending, It is comprised with the downstream roller 30 located in the exit part of the thin stretched film f sent while applying tension | tensile_strength. In contrast, in the second embodiment (FIG. 2 (b)), in addition to the upstream roller 28 and the downstream roller 30, the upstream roller 28 is disposed between the upstream roller 28 and the downstream roller 30. The intermediate roller is set so that the angle δ between the thin stretched film f stretched out from the thin stretched film f and the thin stretched film f wound around the downstream roller 30 is smaller than 180 °, or an acute angle in the embodiment of FIG. 32 is arranged. The intermediate roller 32 is preferably movable between the rollers 28 and 30 in the approaching / separating direction so that the inner angle δ can be varied.

  The upstream roller 28 and the downstream roller 30 of the stretching unit 14 are provided with an upstream rotational speed control unit 28a and a downstream rotational speed control unit 30a for controlling the rotational speeds, respectively (FIGS. 11 to 11). In FIG. 12, the description of the upstream rotational speed control unit 28a and the downstream rotational speed control unit 30a is omitted for simplicity. The roller groups 28, 30 and 32 constituting the extending portion 14 are cylindrical and are rotatably attached to the support shafts 28j, 30j and 32j via bearings.

  In order to continuously convey the loss film F and the thin stretched film f while applying tension without detachment in the stretching section 14, how to apply the loss film F to the upstream roller 28 and the thin stretched film f to the downstream roller 30. is important. That is, (a) the loss film F introduced into the upstream roller 28 and the thin stretched film f drawn from the state wound around the upstream roller 28 and started to stretch by the tension applied in this state intersect. (B) The thin stretched film f introduced from the upstream roller 28 and the thin stretched film K wound around the downstream roller 30 and being twisted while being supplied to the downstream rotary compression unit 20 When the intermediate roller 32 is provided, the thin stretched film f that comes out of the upstream roller 28 and is sent to the downstream roller 30 is suspended to the upstream roller 28. The inner angle δ between the thin stretched film f coming out of the thin film and the thin stretched film f fed to the downstream roller 30 is an angle smaller than 180 ° (preferably 90 ° or close to this). ) To a position it is to place the intermediate roller 32.

  Further, in order to smoothly stretch the loss film F, the upstream roller 28 and the downstream roller 30 have a contact range of at least a half circumference (in terms of angle, 180 ° to 360 °, preferably 270 ° or close to this). It was preferred that the contact is in the range of 270 ° ± 10 °, which is experimentally indicated by ε).

  In other words, the angle formed by the straight line connecting the respective centers of the downstream roller 30 and the intermediate roller 32 with respect to the straight line connecting the respective centers of the upstream roller 28 and the downstream roller 30 is, for example, a right angle or an angle close thereto. (90 ° ± 10 °), and the rollers 28, 30, 32 form a right triangle or a triangle close thereto so that the straight line connecting the centers of the upstream roller 28 and the intermediate roller 32 is a hypotenuse. It is preferable that the respective members are arranged in this manner (in this way, the continuous supply of the loss film F and the stretching of the thin stretched film f could be carried out smoothly and experimentally).

  Note that when the standard loss film F is supplied to the upstream roller 28 and the downstream roller 30, the rotational speed of the downstream roller 30 is about 1 compared to the rotational speed of the upstream roller 28. .5 (in other words, approximately 1.5 times ± 10%, in this case, slip in the upstream roller 28 and the downstream roller 30 is ignored) is set to rotate at a speed (note that The rotation speeds of the upstream roller 28 and the downstream roller 30 are set in the upstream rotation speed control unit 28a and the downstream rotation speed control unit 30a, which are further rotated by the compression rollers 52a and 52b as described later. Determined based on number).

  On the other hand, if the supplied loss film F is not standard, the rotation ratio is such that the thickness of the stretched thin stretched film f is close to the standard thickness or within a range where there is no practical problem. Is set.

  As can be seen from FIG. 1, the apparatus main body 24 of the first embodiment is configured to protrude in a right angle direction at a flat portion 24b to which the mechanism portion according to the present invention except for the rotary compression portion 20 is mounted, and at the central portion thereof. The rotary compression unit mounting portion 24a to which the rotary compression unit 20 is mounted is generally configured.

  The rotary compression unit 20 is composed of a rotary unit 16 and a subsequent compression unit 18, and is attached to a flat plate-like rotary compression unit that is attached so as to protrude in a right angle direction from the flat plate portion 24 b constituting the apparatus main body 24. It is attached to the part 24a. The rotating unit 16 is accommodated in a cylindrical casing 38, and the compression unit 18 is provided with a compression force adjusting mechanism 40 that adjusts the compression force of the compression rollers 52a and 52b. In the present embodiment, as will be described later, the compression force adjusting mechanism 40 is provided in the compression unit 18, but this need not be provided if it is not necessary to adjust the compression force of the compression rollers 52a and 52b. . In the following description, a case where the compression force adjusting mechanism 40 is provided will be described.

  The rotation unit 16 rotates the compression unit 18 relative to the stretching unit 14 with the twisted thin stretched film f (that is, the twisted string material K) supplied from the stretching unit 14 to the compression unit 18 as a rotation center. This is a portion to be provided, and includes a rotating cylinder portion 42, a compression portion rotating motor 44, and an attachment member described later.

  The rotary cylinder portion 42 is a cylindrical member made of a rigid material such as metal, and the upstream side thereof is rotatably inserted and supported via a bearing in the rotary compression portion mounting portion 24 a of the apparatus main body 24. The downstream side is held by a downstream side wall 38c of a casing 38 that is rotatably supported by a downstream end portion of the casing 38 via a holding member 56, which will be described later, mounted on the downstream end of the rotating cylinder portion 42. The rotating cylinder portion 42 and the holding member 56 are positioned so that the through hole of the rotating cylinder portion 42 and the through hole of the holding member 56 are coaxial (see FIGS. 5 to 6).

  A driven pulley 46 is attached to the upstream end portion of the rotary cylinder portion 42, and between the driven pulley 46 and a compression portion rotation pulley 48 attached to the rotation shaft of the compression portion rotation motor 44. A belt 50 is hung. The compression unit rotation motor 44 is attached to the rotation compression unit attachment portion 24 a of the apparatus main body 24. The mounting direction is the protruding direction of the casing 38.

  The compression section 18 is a string material obtained by point compressing a twisted string material K obtained by twisting a thin stretched film f (delivered from the stretching section 14) in a twisted shape between the stretching section 14 and the compression section 18. S is a portion that quickly sends out the string material S obtained by point compression toward the cutting section 22 in the lower process, generally a pair of compression rollers 52a, 52b, followed by a pair of take-up rollers 54a, 54b, a holding member 56 for suspending and holding them, and a roller holding attachment member.

  The holding member 56 includes a block-shaped main body portion 56a, a pair of left and right pressure side holding plate portions 56b and a pressure receiving side holding plate portion 56c that are integrally projected in a bifurcated manner from the rear end surface of the main body portion 56a. A slit groove 56d (see FIG. 8) is provided between the left and right pressure-side holding plate portions 56b and the pressure-receiving side holding plate portion 56c, and is divided vertically by this. The upper side of this part is set as the pressure side holding plate portions 56b1 and 56b2, and the lower side is set as the pressure receiving side holding plate portions 56c1 and 56c2. (Although not shown, the free ends of the divided pressure side holding plate portions 56b1 and 56b2 and pressure receiving side holding plate portions 56c1 and 56c2 are connected to support the compression rollers 52a and 52b and the take-up rollers 54a and 54b. You may make it strengthen these parts.)

  A holding-side through hole 56h is formed in the center of the main body portion 56a of the holding member 56 so as to coincide with the slit groove 56d in a side view from the upstream end to the downstream end, as already described. The holding side through hole 56 h of the holding member 56 communicates with the torsion side through hole 42 a of the rotating cylinder portion 42.

  Each of the compression rollers 52a and 52b is a cylindrical member (or a cylindrical member in which a large number of circular protrusions having a large number of jagged protrusions are provided on the outer periphery thereof). Many protrusions 58 (see FIG. 8) are formed over the entire surface. In this embodiment, in order to facilitate the biting of the string material S, the outer diameter of the pressure-side compression roller 52a disposed at the upper side in FIG. 5 is the pressure-receiving side compression roller 52b disposed at the lower side. The outer diameter is set to be smaller than the outer diameter. Rotating shafts 60a and 60b are coaxially provided at the centers of the pressure side compression roller 52a and the pressure receiving side compression roller 52b, and the both ends of the pair of left and right upper pressure side holdings are formed of a holding member 56. The plate portions 56b1 and 56b2 and the lower pressure receiving side holding plate portions 56c1 and 56c2 are rotatably supported.

  The take-up rollers 54a and 54b are arranged on the downstream side of the compression rollers 52a and 52b. Like the compression rollers 52a and 52b, the pair of left and right rotating shafts 62a and 62b are bifurcated with the holding member 56. The upper pressure side holding plate portions 56b1 and 56b2 and the lower pressure receiving side holding plate portions 56c1 and 56c2 are rotatably supported. Each of the take-up rollers 54a and 54b is a cylindrical member, and is made of a material so as not to slip between the string material S when the string material S compressed by the compression rollers 52a and 52b is taken up. It is desirable to select a material having a high coefficient of friction with the string material S. In this embodiment, an elastic material such as urethane rubber is used, and its outer surface is a smooth surface.

  On the upper surfaces of the pressure-side holding plate portions 56b1 and 56b2, concave shafts 56e and 56f constituting a part of the roller elastic support portions 35 and 35 are respectively provided with rotating shafts 60a and 62a protruding from both ends of the pressure-side compression roller 52a. They are formed at corresponding positions (see FIGS. 8 to 9).

  Here, a pressure adjusting plate 64 is removably attached to a recessed hole 56e provided at a position corresponding to the rotation shaft 60a of the pressure side compression roller 52a, and is formed in the pressure adjusting plate 64. The rotary shaft 60a of the pressure-side compression roller 52a is slidable in the vertical direction (in other words, in the contact and separation direction with respect to the pressure-side compression roller 52b) in a substantially oval roller guide hole 64a extending in the vertical direction. It is supported.

  The inner side surfaces 64b and 64b of the roller guide hole 64a are formed in parallel, and a thick twisted string material K is fed between the compression rollers 52a and 52b, and a large force in the separating direction is applied to the compression roller 52a. In this case, the rotary shaft 60a of the pressure side compression roller 52a slightly slides up and down (in other words, in the separating direction) along the inner side surfaces 64b and 64b. A large number of disc springs 68, which are fitted in a recess 66 provided in the upper surface of the insertion end of the rotary shaft 60a, are elastically brought into contact with the ceiling surface of the roller guide hole 64a so that the rotary shaft 60a is in contact with the roller guide. The hole 64 a is pushed back toward the bottom of the hole 64 a, and the twisted string material K is clamped by the elastic force of the disc spring 68. In other words, the elastic force of the disc spring 68 becomes the pinching force of the twisted string material K. In this case, the pressure adjusting plate 64 itself does not move because it is in contact with the elastic force adjusting unit 102.

  The upper surface 64c of the pressure adjusting plate 64 is slightly inclined downward from the upstream side toward the downstream side.

  The pressure side compression roller 52a is configured to support the pressure side compression roller 52a in the elastic contact direction with respect to the pressure receiving side compression roller 52b, that is, the concave hole 56e and the pressure adjusting plate 64 fitted in the concave hole 56e. A structure in which the spring is sandwiched and supported by the elastic force of the disc spring 68 is referred to as a “roller elastic support portion 35”.

  A concave hole 56f for the take-up roller 54a provided on the downstream side of the concave hole 56e is also formed in an oval shape extending in the vertical direction, like the concave hole 56e. And the spring accommodation hole 56g opened to the upper surface of the pressurization side holding board part 56b1 and 56b2 is drilled in the ceiling surface, respectively, and the opening is covered with the fixed plate 70.

  The rotating shafts 62a and 62a protruding from both ends of the upper take-up roller 54a are inserted into the recessed hole 56f so as to be slidable in the vertical direction (separated from the lower take-up roller 54b). A recess 72 is formed in the upper surface of the insertion end of the rotary shaft 62a. A compression coil spring 74 is stored in a space from the recess 72 to the spring storage hole 56g. The compression coil spring 74 is bent and fitted in the recess 72, and the rotating shaft 62a is constantly pressed toward the bottom of the concave hole 56f by the elastic force of the compression coil spring 74. Note that bearings are interposed between the pressure-side compression roller 52a, the pressure-side take-up roller 54a, and the rotary shafts 60a and 62a (see FIG. 5).

  On the other hand, a rotary shaft 60b and a rotary shaft 62b are coaxially provided at the center of the lower pressure receiving side compression roller 52b and take-off roller 54b, respectively, and both ends thereof are a pair of left and right lower pressure side holding plate portions 56c1. , 56c2 is rotatably supported.

  The rotation shaft 60b of the pressure-receiving side compression roller 52b and the rotation shaft 62b of the take-up roller 54b are connected to each other by pulleys 76 and 78 provided on the pulleys and a belt 80 suspended from the pulleys 76 and 78, respectively. , Both rotate together.

  Next, the elastic force adjusting unit 102 constituting the compressive force adjusting mechanism 40 will be described. The elastic force adjusting part 102 is fixed to the downstream end of the reciprocating cylinder part 96 and reciprocates integrally with the reciprocating cylinder part 96. The elastic force adjusting unit 102 has a bifurcated projecting end portion 102a from the main body portion 102b toward the downstream side, and these support the rotation shaft 60a of the pressing side compression roller 52a of the holding member 56. Along the bifurcated pressure side holding plate portions 56b1 and 56b2.

  The tip end portion 102a of the elastic force adjusting portion 102 is thus provided along the pressure side holding plate portions 56b1 and 56b2, and the pressure adjusting plate 64 provided in each of the pressure side holding plate portions 56b1 and 56c1. Slide while pressing on the upper surface 64c. The lower surface of the tip portion 102a of the elastic force adjusting unit 102 divided into two is inclined downward from the upstream side toward the downstream side, and this inclination angle is the inclination angle of the upper surface 64c of the pressure adjusting plate 64. Is set to match.

  Next, the compression roller rotation mechanism 84 that drives the compression rollers 52a and 52b will be described. This is for constituting a gear train and for rotating the pressure-receiving side compression roller 52b of the compression section 18. The compression section drive transmission gear section 86, the main transmission gear outer cylinder section 88, the driven transmission gear array section 90, the compression section It is comprised by the part drive motor 92 and its attachment member.

  The compression portion drive transmission gear portion 86 includes a shaft 86a, a driven pulley 86b attached to the upstream end portion of the shaft 86a, and a gear 86c attached to the downstream end portion of the shaft 86a. 38 is rotatably supported via a bearing on a rotary compression portion mounting portion 24a of the apparatus main body 24 located on the upstream side where 38 is mounted. A belt 94 is hung between the driven pulley 86 b and the compression unit drive pulley 92 a attached to the rotation shaft of the compression unit drive motor 92.

  The main transmission gear outer cylinder portion 88 is a cylindrical member that is rotatably provided in the circumferential direction on the outer surface of the cylinder portion 96 during the reciprocating movement of the compression force adjusting mechanism 40, and the outer surface is formed in a gear shape. The gear 86c of the compression portion drive transmission gear portion 86 and the first gear 21c of the driven transmission gear train portion 90 to be described later are meshed with each other at opposite positions.

  The driven transmission gear train 90 includes a front gear 90a and a rear gear 90e. The front gear 90a includes a shaft 90b, an upstream gear 90c attached to the upstream end of the shaft 90b, and a downstream gear 90d attached to the downstream end of the shaft 90b. The portion 90e includes a shaft 90f, a gear 90g attached to the upstream side of the shaft 90f, and a bevel gear 90h attached to the downstream side of the shaft 90f. As described above, the gear 90g meshes with the downstream gear 90d of the front gear portion 90a, and the bevel gear 90h meshes with the bevel gear 82 attached to the rotation shaft 60b of the pressure receiving side compression roller 52b. .

  The adjusting mechanism of the compressive force adjusting mechanism 40 includes the above-described reciprocating middle cylinder portion 96, the compressive force adjusting screw portion 98, the guide mechanism 100, the elastic force adjusting portion 102 described above, the axial reciprocating drive motor 104, and the driving force. A gear train and a belt mechanism are provided.

  A meniscus-shaped outer casing 106 is attached to the outer periphery of the upstream end portion of the cylindrical portion 96 during the reciprocating movement, and the rotating cylindrical portion 42 is rotatably inserted through a bearing at the center thereof. The female screw hole 108 is screwed in parallel to the rotating cylinder part 42, and the guide bearing 110 is provided in parallel with the cylindrical part 96 during reciprocating movement by sorting (for example, 90 °) around the female screw hole 108. .

  In accordance with the guide bearing 110, the guide rod 112 is attached to the rotary compression portion attachment portion 24a of the apparatus main body 24 in parallel with the cylindrical portion 96 during the reciprocating movement, and is slidably inserted into the guide bearing 110. . Thereby, the cylinder part 96 does not rotate during the reciprocating movement, and moves the outer surface of the rotating cylinder part 42 in the axial direction independently of the rotation of the rotating cylinder part 42.

  The compression force adjusting screw portion 98 has a shaft 98a rotatably attached to the rotary compression attachment portion 24a of the apparatus body 24 via a bearing, and a driven pulley 98b provided on the upstream side of the shaft 98a. A belt 114 is hung between the driven pulley 98b and the axial drive pulley 104a attached to the rotary shaft of the axial reciprocating drive motor 104.

  The shaft 98a is provided with a male screw portion 98c. The male screw portion 98c is screwed into the female screw portion 108 of the outer casing 106 so as to be able to be screwed back and forth (see FIG. 6).

  As can be seen from FIG. 5, the reciprocating cylinder part 96 reciprocates with respect to the rotating cylinder part 42, but also rotates together. On the other hand, the guide bar 112 of the guide mechanism 100 provided upright on the rotary compression portion attachment portion 24a of the apparatus main body 24 is guided by the outer casing 106 attached to the cylindrical portion 96 during reciprocating movement via a bearing. The outer casing 106 reciprocates together with the reciprocating cylinder portion 96, but the reciprocating cylinder portion 96 rotates with respect to the reciprocating cylinder portion 96. Allow. That is, the outer casing 106 guides the reciprocating movement in the axial direction of the cylindrical part 96 during the reciprocating movement by moving in the approaching and separating direction while facing the rotation compression part attaching part 24a. The elastic force adjusting unit 102 is attached to the downstream end of the reciprocating cylinder part 96, and reciprocates and rotates in the axial direction together with the reciprocating cylinder part 96. Reciprocating relative to the holding member 56 that rotates in agreement.

  The resilience adjusting unit 102 attached to the reciprocating cylinder part 96 rotates together with the reciprocating cylinder part 96, the rotating cylinder part 42, and the compression part 18 as described above. As described above, the elastic force adjusting portion 102 reciprocates and protrudes from the pressure side holding plate portion 56b of the pressure adjusting plate 64 that is slidably fitted in the concave hole 56e of the pressure side holding plate portion 56b. The pressure between the compression rollers 52a and 52b is adjusted by adjusting the amount.

  In this embodiment, the rotary compression unit 20 has a cantilever structure (more specifically, a structure in which the upstream side of the rotary cylinder part 42 constituting the rotary part 16 is supported by the apparatus main body 24). For example, the rotary compression unit 20 has a double-supported structure by separately providing a support member that rotatably supports the holding member 56 that holds the compression rollers 52a and 52b and the take-up rollers 54a and 54b. It is also possible to configure, and by doing so, the rotary compression unit 20 can be stably supported.

  The cutting part 22 is a distance including at least one or more concave indentations Y of the cord material S with concave indentation formed in the compression part 18, preferably wider than the distance of the concave indentations Y formed on the surface thereof. As shown in FIG. 10, it is roughly constituted by a cutting portion casing 116, a pair of guide rollers 118a and 118b, a cutter 120, and a motor 122 with a transmission.

  The cutting portion casing 116 is a thin box-like shape, and a string material introduction port 116a is formed at an upstream end portion (left side in FIG. 12), and a lower end portion (lower end portion in FIG. 10). Is formed with a recycled pellet outlet 116b.

  A pair of guide rollers 118a and 118b are provided in the vicinity of the string material introduction port 116a. Each of the guide rollers 118a and 118b is configured by a plurality of (six in this embodiment) blades 118c projecting from the surface of a cylindrical roller body, has flexibility, and has a string. It is integrally formed of an elastic material such as urethane rubber having a high friction coefficient with the material S. Each guide roller 118a, 118b is shifted by a predetermined angle so that the blade 118c of one guide roller 118a and the blade 118c of the other guide roller 118b do not overlap each other (in this embodiment, they are shifted by 30 degrees) Is arranged). The distance between the guide rollers 118a and 118b is set to be approximately equal to the sum of the maximum radius of one guide roller 118a and the maximum radius of the other guide roller 118b. Lightly clamped (see FIG. 10).

  A cutter 120 is rotatably attached to the center of the cutting portion casing 116, and a rotation shaft of a motor 122 with a transmission is connected to the center of the cutter 120. The number of rotations of the cutter 120 is appropriately set according to the feeding speed of the string material S and the size of the regenerated pellet P formed by cutting the string material S.

  A recycled pellet recovery box 124 for recovering the recycled pellets P cut by the cutting unit 22 is disposed below the recycled pellet discharge port 116b of the cutting unit casing 116 (downward in FIG. 10).

  When the recycled pellets P are manufactured using the recycled pellet manufacturing apparatus 10A, first, the loss film F as a raw material is set to a predetermined feeding path. In addition, although a present Example demonstrates the case where three loss films F are used as a raw material, the number is not limited to three, for example, one or two may be sufficient, and four or more There may be. In the case of one, as already described, the one having a width or thickness comparable to the appropriate number when this is narrowed is used.

  The three loss films F are aligned, and the tip portions thereof are lightly twisted to make a bundle, which are fixed rolls 26a and 26b of the loss film supply unit 12, dancer rolls 26c, upstream rollers 28 of the stretching unit 14, The intermediate roller 32 and the downstream roller 30 are set in this order. When the loss film F is set on the upstream roller 28, the loss film F directed to the upstream roller 28 and the loss film F exiting from the upstream roller 28 are set so as to intersect (FIG. 2A). b)). When the loss film F is set on the downstream roller 30, the loss film F toward the downstream roller 30 and the loss film F exiting from the downstream roller 30 are set so as to cross each other as described above.

  Subsequently, the three loss films F, which are lightly twisted together and passed together, are passed through the torsion side through-holes of the rotating cylinder portion 42, and the insertion ends thereof are paired between the pair of compression rollers 52a and 52b. Setting is completed by inserting between the take-up rollers 54a and 54b and between the pair of guide rollers 118a and 118b in this order.

  When passing the loss film F between the pair of compression rollers 52a and 52b, it is preferable to release the pressing force of the pressure side compression roller 52a against the pressure receiving side compression roller 52b in advance and to make the pressure side compression roller 52a free. .

  In order to release the pressing force of the pressure-side compression roller 52a against the pressure-receiving side compression roller 52b, the elastic force adjusting unit 102 can be slid downstream by operating the axial reciprocating drive motor 104 of the compression force adjusting mechanism 40. The mechanism will be described with reference to FIG.

  First, when the axial reciprocating drive motor 104 is operated, the rotational force is transmitted to the driven pulley 98b of the compression force adjusting screw portion 98 via the axial drive pulley 104a and the belt 114, and the shaft of the compression force adjusting screw portion 98 is transmitted. 98a rotates. Then, the outer rod 106 of the reciprocating middle cylinder portion 96 screwed into the male threaded portion 98c of the compression force adjusting screw portion 98 moves in the screwing direction, and the reciprocating middle cylinder portion 96 and the downstream end thereof are moved. The connected elastic force adjusting unit 102 slides to the downstream side (compression roller 52a, 52b side) together with the rotating cylinder unit 42.

  Here, the lower surface of the tip portion 102a of the elastic force adjusting unit 102 and the upper surface 64c of the pressure adjusting plate 64 are inclined downward from the upstream side toward the downstream side (see FIG. 9). When the elastic force adjusting unit 102 slides downstream, the pressure adjusting plate 64 receives the elastic force of the disc spring 68 and moves upward (in the direction away from the recessed hole 56e) in FIG.

  When the pressure adjusting plate 64 moves in the direction away from the recessed hole 56e, the disc spring 68 expands and its resilience (in other words, the pressing force of the pressure side compression roller 52a against the pressure side compression roller 52b) is increased. The pressure gradually decreases, and finally, the pressing force of the pressure side compression roller 52a against the pressure receiving side compression roller 52b is released.

  After releasing the pressing force of the pressure-side compression roller 52a against the pressure-receiving side compression roller 52b by the above method, the loss film F is passed between the pair of compression rollers 52a and 52b. Then, the pressing force of the pressure side compression roller 52a is applied to the pressure receiving side compression roller 52b.

  When passing the loss film F between the pair of take-up rollers 54a and 54b, the bolts are loosened to free the compression coil spring 74, and the pressure-side take-up roller 54a is previously separated from the pressure-side take-up roller 54b. Good.

  After releasing the pressing force of the pressure-side take-up roller 54a against the pressure-side take-up roller 54b and inserting the loss film F between the pair of take-up rollers 54a, 54b, the pressure-side take-up roller 54a is moved to the pressure-side take-off roller 54a in the opposite procedure. Apply pressure.

  When the loss film F is set between the pair of guide rollers 118a and 118b, the loss film F may be bent while passing through the gap between the guide rollers 118a and 118b. FIG. 10 shows a state in which the string material S passes between the guide rollers 118a and 118b. However, even when the loss film F is set, the state is almost the same.

  When the setting of the loss film F is completed as described above, the power of the recycle pellet manufacturing apparatus 10C is turned on, and the stretching unit 14, the rotary compression unit 20 (the rotary unit 16 and the compression unit 18), and the cutting unit 22 are operated. The production of recycled pellets P is started.

  In the loss film supply unit 12, the loss film F is supplied to the stretching unit 14 while applying a certain tension to the loss film F. Then, the upstream roller 28 and the downstream roller 30 rotate to apply tension to the loss film F, and send it to the compression unit 18 as a lower process while stretching it.

  The take-up speed of the compression part 18 is used as a reference so that no sagging occurs when taking the thin stretched film f (the twisted string material K being twisted at this stage) from the stretch part 14 to the compression part 18. The feeding speed of the extending portion 14 is determined. As described above, the rotational speed of the downstream roller 30 is set higher than the rotational speed of the upstream roller 28 (in this embodiment, the downstream roller 30 is approximately 1. Therefore, the loss film F supplied to the stretching unit 14 is strongly pulled between the upstream roller 28 and the downstream roller 30, is thin, and The thin stretched film f stretched long and narrow is sent to the compression unit 18 as a lower process.

  The important point here is that, as described above, in the stretching section 14, (a) the loss film F introduced into the upstream roller 28 and the state wound around the upstream roller 28 are pulled out and added in this state. (B) The thin stretched film f introduced from the upstream roller 28 is wound around the downstream roller 30 and is rotated on the downstream side. The thin stretched film K in a twisted state supplied to the section 20 is fed out in an intersecting state. At this time, the contact angle ε between the thin stretched film f and the rollers 28 and 30 is preferably 270 ° ± 10 °.

  Further, when the intermediate roller 32 is provided between the upstream roller 28 and the downstream roller 30 as shown in FIG. 2B, the thin stretched film that comes out of the upstream roller 28 and is sent to the downstream roller 30 The intermediate roller is positioned at a position where the internal angle δ between the thin stretched film f that has been suspended from the upstream roller 28 and the thin stretched film f fed to the downstream roller 30 is an angle smaller than 180 ° (preferably an acute angle). The point where 32 is arranged is also important.

  In this way, the upstream roller 28 and the downstream roller 30 intersect with the loss film F or the thin stretched film f so that even if the stretched film is stretched while being continuously fed, it intersects. The loss film F and the thin stretched film f wound around the downstream roller 30 are attracted to the center of the upstream roller 28 and the downstream roller 30 while rubbing against each other, and fall off from the upstream roller 28 and the downstream roller 30. There is nothing, and the predetermined stretching is effectively performed.

  The compressing unit 18 rotates around the extending unit 14 while sharing the central axis by the operation of the rotating unit 16. Accordingly, the thin stretched film f supplied from the stretching unit 14 is twisted between the downstream roller 30 and the compression rollers 52a and 52b of the compression unit 18 from the moment when it passes the downstream roller 30 of the stretching unit 14. The twisted string material K is twisted.

  Here, a twisting method for twisting the rotary compression part 20 having the rotary part 16 in a part thereof with respect to the extending part 14 will be described with reference to FIG.

  In the rotary compression unit 20, it is the rotation unit 16 that plays a role of applying a rotational force in the torsional direction to the compression unit 18. When the compression unit rotation motor 44 rotates, the rotation force is rotated by the compression unit. The rotation is transmitted to the rotary cylinder 42 via the pulley 48, the belt 50, and the driven pulley 46, and the rotary cylinder 42 rotates.

  When the rotating cylinder part 42 rotates, the compression part 18 (that is, the compression rollers 52a and 52b and the take-off rollers 54a and 54b supported by the holding member 30) attached to the downstream end of the rotating cylinder part 42 also rotates. It rotates integrally with the tube part 42. When the compression unit 18 starts to rotate in the torsional direction together with the rotating cylinder portion 42, as described above, the thin stretched film f thinly stretched in the stretching portion 14 attached to the apparatus main body 24 is downstream. A twisted string material K is formed by twisting between the side roller 30 and the compression rollers 52a and 52b. This twisted string material K is taken up by the rotation of the compression part 18 in the take-up direction and is sent to the cutting part 22 which is a lower process, which will be described below.

  The rotation in the take-up direction of the compression rollers 52a and 52b is given by the operation of the compression roller rotation mechanism 84. When the compression section drive motor 92 of the compression roller rotation mechanism 84 rotates, the rotation is transmitted to the main transmission gear outer cylinder section 88 via the compression section drive pulley 92a, the belt 94 and the compression section drive transmission gear section 86.

  The main transmission gear outer cylinder part 88 is provided on the outer surface of the reciprocating cylinder part 96 so as to be rotatable in the circumferential direction, but reciprocates together with the reciprocating cylinder part 96 when adjusting the compression force of the compression rollers 52a and 52b. Since it moves, the screw of the reciprocating length is engraved. And this long main transmission gear outer cylinder part 88 which rotates the outer periphery of the cylinder part 96 during the reciprocating movement meshes with the gear 86c of the compression part drive transmission gear part 86, and in accordance with the rotation of the compression part drive transmission gear part 86. During the reciprocating movement, the outer surface of the cylindrical portion 96 is rotated in the circumferential direction.

  When the main transmission gear outer cylinder 88 rotates in the circumferential direction on the outer surface of the cylinder 96 during the reciprocating movement, the upstream gear 90c of the driven transmission gear train 90 meshed with the main transmission gear outer cylinder 88 rotates. The rotation is transmitted to the rear gear portion 90e via the shaft 90b and the downstream gear 90d.

  Then, the rotation transmitted to the rear gear portion 90e is converted into a rotation in the direction in which the twisted string material K is sent downstream by the bevel gear 90h and the bevel gear 82 meshing with the bevel gear 90h. It is transmitted to the pressure receiving side compression roller 52b.

  Since the pressure side compression roller 52a is pressed against the pressure side compression roller 52b by the elastic force of the disc spring 68, when the pressure side compression roller 52b rotates, the pressure side compression roller 52a also moves the pressure side compression roller 52b. Rotate together, and send it to the downstream side while giving an impression Y to the twisted string material K compressed and clamped between the compression rollers 52a and 52b. Then, the rotational force of the pressure receiving side compression roller 52 b is transmitted to the pressure receiving side take-up roller 54 b via the pulley 76, the belt 80 and the pulley 78.

  The string material S formed by point compression by the compression rollers 52a and 52b is taken up by the take-up rollers 54a and 54b and sent to the cutting unit 22 which is a lower process. The string material S sent by the take-up rollers 54a and 54b is sequentially sent to the string material introduction port 116a of the cutting portion casing 116 by the guide rollers 118a and 118b as described above, and is cut at a predetermined interval by the cutter 120. Thereby, the reproduction | regeneration pellet P is formed. Note that the string material S sent by the take-up rollers 54a and 54b is sent to the guide rollers 118a and 118b while rotating around, so that the string material S itself is twisted and tends to be in a dumpling state. However, in this embodiment, since the string material S is lightly grasped from the upper and lower sides by the blades 118c provided on the surface of the cylindrical roller body 160, even if the string material S itself is twisted, The string material S can be stably supplied to the cutter 120.

  The recycled pellets P formed as described above are discharged to the outside from the recycled pellet discharge port 116b and are recovered in a recycled pellet recovery box 124 provided below the pellets.

  The driven transmission gear train 90 is supported by the downstream side wall 38c of the casing 38 and is rotatable with respect to the downstream side wall 38c, like the holding member 56 of the compression unit 18. Since the side wall 38c is attached to the casing 38 so as to be rotatable in the torsional direction, the driven transmission gear train 90 and the main transmission gear outer cylinder 88 are meshed with each other, and the compression unit 18 and the resilience adjusting unit. 102, the periphery of the rotating cylinder portion 42 rotates in the circumferential direction thereof (that is, the driven transmission gear train 90 is in a state where the upstream gear 90c is always meshed with the main transmission gear outer cylinder 88). It will rotate around the rotating cylinder part 42).

  Therefore, if the rotation speed of the gear 86c of the compression section drive transmission gear section 86 is not increased so that the rotation speed of the main transmission gear outer cylinder section 88 becomes larger than the rotation speed of the rotation cylinder section 42, the rotation of the compression rollers 52a and 52b. Since the direction does not rotate in the take-up direction but reverses, it is necessary to control the rotation speed of the compression section drive motor 92 so that such a relation (= a relation that rotates in the take-up direction) can be maintained. . Note that the rotational speed of the compression rollers 52a and 52b in the take-off direction regulates the operating speed of the entire apparatus. Therefore, this rotational speed is the control reference for the downstream rotational speed control units 28a and 30a. In this case, the take-off direction rotational speed of the compression rollers 52a and 52b may be made to coincide with the feeding speed of the extending portion (14). However, the take-up direction rotational speed of the compression rollers 52a and 52b is determined from the feed speed of the extending portion (14). You may enlarge it. By doing in this way, twist will be added in the further extending state, and the further compression effect can be heightened.

  The variable adjustment of the compression force of the compression rollers 52a and 52b is as described above, but supplementally, when the outer reed 106 is reciprocated by operating the axial reciprocating drive motor 104, the reciprocating middle cylinder portion 96 is obtained. Are reciprocally moved to reciprocate the elastic force adjusting unit 102. At that time, a long gear engraved on the outer peripheral surface of the main transmission gear outer cylinder portion 88 is connected to the gear 86c of the compression portion drive transmission gear portion 86 and the driven gear. While maintaining the meshing state with the upstream gear 90 c of the transmission gear train 90, the reciprocating cylinder portion 96 reciprocates. At a time other than the variable adjustment of the compression force of the compression rollers 52a and 52b, the stationary state at that position is maintained, and the main transmission gear outer cylinder portion 88 rotates at that position.

  The technique of stretching the loss film F in the stretching section 14 and twisting the stretched thin stretch loss film f to form the twisted string material K can also be applied to other recycled pellet manufacturing apparatuses.

  For example, in the recycled pellet manufacturing apparatus 10B of the second embodiment shown in FIG. 11, the compression unit 18 and the cutting unit 22 are arranged in this order on the downstream side of the stretching unit 14, and the rotation unit 16 beside the compression unit 18. Is arranged. A loss film supply unit 12 is provided on the upstream side of the stretching unit 14.

  In the recycled pellet manufacturing apparatus 10 </ b> B of the present embodiment, the rotating unit 16 plays a role of applying a rotational force in the twist direction to the compressing unit 18. That is, when the motor 44 of the rotating unit 16 rotates, the rotational force is transmitted via the rotating pulley 126a attached to the rotating shaft of the motor 44, the belt 128, and the driven pulley 130 attached to the rotating shaft of the compressing unit 18. The compression unit 18 rotates. The power supply to the compression rollers 52a and 52b and the take-up rollers 54a and 54b of the compression unit 18 is performed by a slip ring 132 provided on the upstream side of the compression unit 18.

  When the compression unit 18 starts rotating in the twisting direction, as described above, the thin stretched film f thinly stretched in the stretching unit 14 is between the downstream roller 30 of the stretching unit 14 and the compression rollers 52a and 52b. Thus, the twisted string material K is formed.

  The twisted string material K is point-compressed by the compression rollers 52a and 52b to form the string material S, and the string material S is taken up by the take-up rollers 54a and 54b, while being drawn to the downstream cutting portion 22. Sent.

  In the cutting part 22, the string material S is cut at a predetermined interval by the cutter 120 as in the above-described embodiment, and the regenerated pellet P is formed. The formed recycled pellets P are collected in a recycled pellet collection box 124 immediately below the cutting unit 22.

  Next, a regenerated pellet manufacturing apparatus 10C of the third embodiment shown in FIG. 12 will be described. The recycled pellet manufacturing apparatus 10C of the present embodiment includes the loss film supply unit 12, the stretching unit 14, the rotation unit 16, the compression unit 18, and the cutting unit 22 as described above. The integral part of the compression part 18 and the cutting part 22 attached to the tip of the cylinder part 42 is surrounded by the integral part, and the circumference of the integral part is surrounded by the circumferential direction of the rotary cylinder part 42 (coyled string A rotating frame 134 that rotates in the twisting direction of the material K is provided (the rotating frame 134 is rotatably supported at the apparatus main body 24 at the downstream end portion of the rotating shaft).

  In the recycled pellet manufacturing apparatus 10 </ b> C of the present embodiment, the rotating unit 16 plays a role of applying a rotational force in the twisting direction to the rotating frame 134. That is, when the motor 44 of the rotating unit 16 rotates, the rotational force is transmitted via the rotating pulley 136a attached to the rotating shaft of the motor 44, the belt 138, and the driven pulley 134a attached to the rotating shaft of the rotating frame 134. The rotating frame 134 rotates. The rotating frame 134 is provided so as to be rotatable around the rotating cylinder part 42 and the integral part of the compression part 18 and the cutting part 22 attached to the tip thereof, with the rotating cylinder part 42 as an axis. When the frame 134 is rotated, the integral part of the compression unit 18 and the cutting unit 22 is kept stationary by its own weight.

  The power supply to the compression unit 18 (the compression rollers 52a and 52b and the take-off rollers 54a and 54b) and the cutting unit 22 (cutter 120) accommodated in the rotary frame 134 which is a rotating body is performed via the slip ring 132. Done.

  When the power is turned on in the recycled pellet manufacturing apparatus 10C of the present embodiment, the loss film F is thinly stretched in the stretching section 14 to form a thin stretched film f as described above. Then, the formed thin stretched film f is twisted in the form of a twist while the periphery of the rotating frame 134 rotating around the rotating cylinder portion 42 is sent to form a twisted string material K.

  The important point here is that in this embodiment, the feeding direction of the thin stretched film f is reversed in the course of passing through the rotating frame 134, so that the thin frame is rotated during one rotation of the rotating frame 134. The stretched film f will be twisted twice. That is, the number of twists per unit time is doubled, and the bulk density is further increased.

  Then, the twisted string material K twisted in a twisted shape is point-compressed by the compression rollers 52a and 52b of the compression section 18 to form a string material S. The string material S is formed by the take-up rollers 54a and 54b. It is sent to the cutting section 22 on the downstream side while being taken.

  In the cutting part 22, the string material S is cut at a predetermined interval by the cutter 120 as in the above-described embodiment, and the regenerated pellet P is formed.

10A, 10B, 10C ... Recycled pellet manufacturing apparatus 12 ... Loss film supply unit 14 ... Stretching unit 16 ... Rotating unit 18 ... Compressing unit 20 ... Rotating compressing unit 22 ... Cutting unit 24 ... Device body 28 ... Upstream roller 30 ... Downstream side Roller 32 ... Intermediate roller 40 ... Compression force adjusting mechanism 42 ... Rotating cylinder portion 64 ... Pressure adjusting plate 120 ... Cutter 124 ... Recycled pellet recovery box F ... Ross film f ... Thin stretched film K ... Coyled string material S ... String material P: Recycled resin pellet Y: Concave indentation

Claims (8)

Stretching one or a plurality of synthetic resin loss films that are continuously supplied, and extending a stretched thin stretched film to a pair of compression rollers disposed on the downstream side;
The thin-walled stretching disposed on the downstream side of the stretching portion and having a pair of compression rollers with irregularities formed on the outer peripheral surface, and rotated relative to the stretching portion and taken from the stretching portion A rotary compression unit that applies twist to the film and simultaneously compresses the twisted string material formed by twisting the thin stretched film with the compression roller to form a string material with a concave impression;
An apparatus for producing regenerated pellets, comprising: a cutting portion that is provided on the outlet side of the rotary compression portion and cuts the cord material with concave indentation at intervals including at least one concave indentation. The stretched portion is
An upstream roller on the entrance side from which the introduced loss film and a thin stretched film drawn out from the winding state and started to be stretched by the tension applied in this state are fed out in an intersecting state, and downstream of the upstream roller A thin stretched film that is spaced apart from the upstream roller and that rotates at a higher speed than the upstream roller and is introduced from the upstream roller in a stretched state on the downstream side after being wound 2. The apparatus for producing regenerated pellets according to claim 1, wherein the apparatus is formed by an outlet-side downstream roller that is fed in an intersecting state with the thin stretched film supplied to the rotary compression unit. The stretched portion is
An upstream roller on the inlet side where the introduced loss film and the thin stretched film drawn out from the wound state and started to stretch by the tension applied in this state are fed out in an intersecting state,
Wrapped with a thin stretched film disposed downstream of the upstream roller and spaced apart from the upstream roller, rotated at a higher speed than the upstream roller, and introduced from the upstream roller in a stretched state. After that, the outlet side downstream roller from which the thin stretched film supplied to the rotary compression unit on the downstream side is fed out in an intersecting state, and the upstream roller and the downstream roller are disposed, and the upstream side An angle between the thin stretched film coming out of the side roller and sent to the downstream roller is suspended and the thin stretched film coming out of the upstream roller and the thin stretched film sent to the downstream roller is smaller than 180 ° The apparatus for producing regenerated pellets according to claim 1, wherein the apparatus is formed by an intermediate roller disposed at a position where   The apparatus for producing regenerated pellets according to any one of claims 1 to 3, wherein a take-up speed of the compression roller is made faster than a delivery speed of the thin stretched film from the stretching section. In the manufacturing apparatus of the reproduction | regeneration pellet described in any one of Claims 1-4,
The rotary compression unit is
A rotating cylinder portion that is rotatably attached to the apparatus main body and through which the stretched thin stretched film passes while being twisted,
A compression unit rotating motor fixed to the apparatus main body and configured to rotate the rotating cylinder unit;
A compression unit provided at an outlet of the rotary cylinder part, rotating together with the rotary cylinder part, and having a compression roller for sandwiching and pressing a twisted thin stretched film;
A main transmission gear outer cylinder portion rotatably attached to an outer periphery of the rotary cylinder portion; a compression portion drive transmission gear portion meshed with the main transmission gear outer cylinder portion and rotatably attached to the apparatus main body; A compression unit drive motor that is rotatably mounted on the main body and that rotationally drives the compression unit drive transmission gear unit, and meshes with the main transmission gear outer cylinder unit to transmit the rotation of the compression unit drive transmission gear unit to the compression roller. An apparatus for producing regenerated pellets, comprising a driven transmission gear train. In the manufacturing apparatus of the reproduction | regeneration pellet described in any one of Claims 1-4,
The rotary compression unit is
A rotating cylinder part that is rotatably attached to the apparatus body and through which the stretched thin stretched film passes,
A compression unit rotating motor fixed to the apparatus main body and configured to rotate the rotating cylinder unit;
A compression unit provided at an outlet of the rotary cylinder part, rotating together with the rotary cylinder part, and having a compression roller for sandwiching and pressing a twisted thin stretched film;
A reciprocating middle cylinder part that is reciprocally slidable in the axial direction on the outer periphery of the rotary cylinder part, and is rotatably attached to the outer circumference of the reciprocating middle cylinder part that rotates together with the rotary cylinder part. A main transmission gear outer cylinder part which is reciprocated in the axial direction together with the cylinder part in which the gear is engraved, and a compression part which meshes with the main transmission gear outer cylinder part and which is rotatably attached to the rotary compression part attachment part A compression transmission drive motor that is rotatably attached to the drive transmission gear section and the rotary compression section mounting section, and that rotates the compression section drive transmission gear section and meshes with the main transmission gear outer cylinder section, and the compression section drive transmission. A driven transmission gear train that transmits the rotation of the gear to the compression roller;
An outer portion that is rotatably attached to the apparatus main body, is rotatably provided on an outer periphery of the cylinder portion during the reciprocating movement, and is reciprocated together with the cylinder portion during the reciprocating movement while being guided by a guide mechanism provided in the apparatus main body. A compression force adjusting screw portion that is screwed into a female screw hole provided in the flange and reciprocates the tube portion during reciprocation in the axial direction of the rotation tube portion;
An axial reciprocating drive motor that is attached to the apparatus body and that rotationally drives the compression force adjusting screw portion;
A roller elastic support portion provided on a holding member of the compression portion that rotatably supports the compression roller, and supports the other compression roller in a resilient contact direction with respect to the one compression roller;
A resilient force adjusting portion fixed to the reciprocating cylinder portion and configured to change a resilience of the roller elastic support portion in accordance with the axial movement of the reciprocating cylinder portion. Recycled pellet manufacturing equipment. One or a plurality of synthetic resin loss films are twisted to form a twisted string material, and the twisted string material is point-compressed to form a string material with a concave impression, and at least one string material with a concave impression is formed. In the manufacturing method of the regenerated pellet by forming the regenerated resin pellet by cutting at intervals including the concave indentation of
A method for producing reclaimed pellets, characterized in that a stretched string material is formed by applying a stretching force to one or a plurality of loss films to stretch them thinly and twisting the stretched thin stretched film.   The method for producing a regenerated pellet according to claim 8, wherein in the twisting step of the thin stretched film, a twisted twisted string material is formed by twisting the stretched thin film while further stretching.

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