JP2006213006A - Disk type kneading unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk type kneading unit and a shaping machine each being of a low cost, being easily disassembled for cleaning, giving an extruded resin satisfying a high quality and having a high kneading ability. <P>SOLUTION: The disk type kneading unit comprises; a rotatable disk that has a plurality of radial and spiral grooves mounted at a same angle pitch on the front side surface of the rotatable disk having a diameter larger than a diameter of a screw fixed to a tip of an extruding screw, the radial and spiral grooves being formed in such a manner that the rotating tip end becomes an angle of a level difference in case of rotation of the rotatable disk and the downstream side of the radial and spiral grooves is tapered toward the bottom of the level difference of the next spiral; and a kneading frame that is fixed to the tip of an extruding cylinder, and has a plurality of radial and spiral grooves having the same shape as that of the rotatable disk mounted on the surface of the disk face to face spaced apart from the rotatable disk, the grooves being formed in such a manner that the tip of the radial and spiral grooves facing to the rotation of the rotatable disk becomes an angle of the level difference and the radial and spiral grooves tapering toward the bottom of the next level difference are mounted on the opposite angle side. The shaping machine has the unit. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a kneading unit for use in single screw extruders or injection molding machines for plastics, foods, ceramics, rubbers, etc., and in particular, a disk type kneading unit for high kneading provided at the tip of a resin extrusion screw and the same. The present invention relates to a molding machine having a kneading unit.

  FIG. 17 shows a resin mixing dull image attached to the tip of a typical representative extrusion screw (Patent Document 1: Japanese Patent No. 3442799). A plurality of fin portions 03 are provided on the outer periphery of the shaft portion at the tip of the screw 06, and the resin fed into the fin portions 03 is divided by fins 02 that are divided into a number of strips and formed between the fins 02. The resin that is pushed out to the tip while turning in the groove 01 and merged at the outlet of the fin portion 03 is subjected to a shearing action along the rotation of the screw in the cylindrical portion 04 and is stretched in the circumferential direction. The kneading is performed while receiving the combined action of being divided by the fins 02 at the subsequent stage.

  Further, the kneading unit of the conventional example announced in Patent Document 1 (Japanese Patent No. 3442799) has a plurality of fins 102 on the outer periphery of the screw 106 and a plurality of fins 110 on the inner periphery of the cylinder 107, as shown in FIG. In addition to being formed individually, the fins 102 of the screw 106 and the fins 110 of the cylinder 107 are alternately arranged in the axial direction. In this kneading unit, in addition to the dull image mixing action, when the resin passes between the fins 102 and 110, the kneading unit gives a strong shearing action in the direction perpendicular to the axis at the part having the gaps δ1 and δ2 between the fins. The effect is enhanced.

  In Patent Document 2 (Japanese Patent Publication No. 54-21989), a disc-type kneading device is provided in the middle part of the extrusion screw 201 as shown in FIGS. 19, 20, and 21 to improve kneadability. A configuration with a different configuration has been proposed. The rotating disc 208A is provided with spiral projections 221 and 223, and the fixed discs 224 and 225 are provided with radial projections 226 and 227, so that the resin can be fed out, and both surfaces of the rotating disc 208A and the fixed disc 224 are provided. 225, plasticization and kneading are performed by mutual shearing generated in the resin interposed between 225.

  Further, Patent Document 3 (Japanese Utility Model Publication No. 6-38661) proposes an apparatus with a large tip diameter of the extruder in order to increase the life of the screen 309 attached to the front surface of the breaker plate 324 as shown in FIG. Has been. The tip 326a of the screw 326 is formed into a trumpet shape, and two surfaces are cut out to form a chamfered portion, the gap K between the breaker plate 324 and the screw tip 326a is made the same, and uniform stirring is performed at the screw tip 326a. Thus, the filtration area is increased while preventing stagnant burning.

Japanese Patent No. 3442799 (FIGS. 1 and 13) Japanese Patent Publication No.54-21989 (FIGS. 1, 4, and 5) Japanese Utility Model Publication No. 6-38661 (FIG. 1)

  When the resin is kneaded with the screw having the dalmage of the conventional example shown in Patent Document 1 (FIG. 13), if a large amount of resin is to be processed, the residence time of the resin passing through the dalmage is short, so that the inhomogeneous due to kneading failure May cause product.

In addition, the kneading unit of the conventional example shown in Patent Document 1 (FIG. 1) has sufficient kneading performance, but due to the combined structure of the fins provided on the screw and the cylinder, it takes a lot of time to attach and detach the screw, Heavy workload such as cleaning and resin replacement.
Recent extrusion molding requires high capacity and high quality of resin molded products, and of course it is homogeneous, and there is a tendency to be extremely disliked by the inclusion of visible foreign substances and deteriorated products. The higher the desired kneading function, the more difficult it is to disassemble, clean, etc., the more complicated the equipment is, and therefore the more expensive it becomes, and there is a risk of insufficient cleaning of the inside of the cylinder side fins. ing.

In addition, the kneading unit of the conventional example shown in Patent Document 2 is large and expensive, and requires a lot of work for disassembly, assembly, and cleaning. In addition, since the gap between the rotating disc 208A and the fixed discs 224 and 225 is adjusted, there is no self-sweeping due to the flow of the resin, and the resin stays at the joint between the fixed frame and the ring. There is a risk that the resin is burned in the resin product, and the deteriorated resin is mixed with the resin, thereby impairing the quality.
Further, in the structure of the conventional example shown in Patent Document 3, even if the tip diameter is increased and the filtration area is increased, the extrusion capability is not improved, and the advantage of widening the tip diameter is not fully utilized.

  The present invention is to provide a disk-type kneading unit and a molding machine having a high kneading function, which are easy to process, low-cost, easy to disassemble and clean, and can obtain a high quality that can satisfy the extruded resin. Objective.

With respect to the above problems, the present invention aims to solve the problems by the following means.
(1) A disc type kneading unit as a first means is a disc type kneading unit in which a resin material is kneaded and plasticized while being heated, and is attached to the tip of an extruder for feeding to a molding means, and a rotary disc is integrally coupled to an extrusion screw. A plurality of radial spiral grooves having an equiangular pitch are provided on the front side surface of the rotating disk having a diameter larger than the screw diameter fixed to the tip of the extrusion screw, and the radial spiral grooves are arranged on the rotation leading edge side when the disk rotates. Becomes a corner of the step, and a rotary disk having a radial spiral groove formed so that the downstream side of the radial spiral groove is tapered toward the lower level of the next spiral, and the rotary disk fixed to the tip of the extrusion cylinder, A plurality of radial spiral grooves having the same shape as the rotating disk are provided on the disk surface facing each other with a gap therebetween, and the radial spiral grooves are opposed to the rotation of the rotating disk. The leading edge is a corner of the step, and the opposite angle side is composed of a kneading frame forming a fixed disk provided with a radial spiral groove that is tapered toward the next step. To do.

(2) The disk-type kneading unit of the second means is the disk-type kneading unit of the first means, wherein the plurality of radiating spiral grooves of the rotating disk and the plurality of radiating spiral grooves of the fixed disk of the kneading frame are from the same direction. It is provided so as to be crossed when viewed, and is formed so that the resin sandwiched between the grooves of the rotating disk and the fixed disk part is guided toward the outer periphery when the extrusion screw rotates the resin. To do.
(3) The disk-type kneading unit of the third means is the same as the first or second means disk-type kneading unit, wherein the cylindrical extension provided at the tip of the rotating disk (the downstream side of the resin flow) It is characterized in that both sides of the half dividing line are cut symmetrically and obliquely.

  (4) A disc type kneading unit as a fourth means is a disc type kneading unit in which a resin material is kneaded and plasticized while being heated, and is attached to the tip of an extruder for feeding to a molding means, and a rotating disk is integrally coupled to an extrusion screw. A plurality of radial spiral grooves having an equiangular pitch are provided on a resin delivery side surface of a rotating disk having a diameter larger than the screw diameter fixed to the tip of the extrusion screw, and the radial spiral grooves are rotated at the time of rotation of the disk. A rotating disk having a radial spiral groove formed so that the edge side becomes a corner of the step and the downstream side of the radial spiral groove is tapered toward the bottom of the next spiral step, and the rotation of the rotation cylinder fixed to the tip of the extrusion cylinder A plurality of radiating spiral grooves having the same shape as the rotating disk are provided on a disk surface facing the disk with a gap, and the radiating spiral grooves are used to rotate the rotating disk. The leading edge is the corner of the step, and the opposite side is composed of a kneading frame forming a fixed desk provided with a radial spiral groove that tapers down to the next step. And

  (5) The disk type kneading unit of the fifth means is the disk type kneading unit of the fourth means, wherein the spiral groove edge of the rotating disk and the spiral groove edge of the fixed disk of the kneading frame intersect when viewed from the same direction. The resin sandwiched between the grooves of the rotating disk and the fixed disk portion is arranged so as to be guided toward the centripetal direction when the rotating disk rotates by the resin pushing action of the extrusion screw. And

  (6) The disc type kneading unit of the sixth means is a disc type kneading unit installed at the tip of an extruder that heats and plasticizes the resin material and feeds it to the molding means, and is fixed to the tip of the extrusion screw. A plurality of radial spiral grooves having equiangular pitches are provided on both sides of a rotating disk having a diameter larger than the screw diameter, and the radial spiral groove has a step angle on the rotating leading edge side when the disk rotates, and the rotational spiral groove is downstream of the radial spiral groove. A rotating disk having a spiral spiral groove formed on the side so as to be tapered toward the lower step of the next spiral, and the rotating disk radiating to the disk surfaces on both sides facing each other with a gap between both sides of the rotating disk A plurality of radiating spiral grooves similar to the spiral groove are provided, and the radiating spiral groove has a leading edge facing the rotation of the rotating disk as a corner of the step, and the opposite side is a taper toward the next step. It made such radiation helical groove to form a fixed desk provided, characterized in that it is composed of a kneading frame fixedly attached to the extrusion cylinder tip.

(7) The disk-type kneading unit of the seventh means is the disk-type kneading unit of the sixth means, wherein the plurality of spiral groove edges of the rotating disk and the plurality of spiral groove edges of the fixed disk of the kneading frame are from the same direction. When the rotating disk rotates by the resin extrusion action of the extrusion screw, the resin sandwiched between the rotation disk on the extrusion screw side and the groove of the fixed disk part is guided toward the outer periphery and sent out. The resin sandwiched between the grooves of the rotating disk on the side and the fixed disk portion is arranged so as to be guided toward the centripetal direction.

(8) The disk-type kneading unit of the eighth means is a disk-type kneading unit installed at the tip of an extruder that heats and plasticizes the resin material and feeds it to the molding means, and is fixed to the tip of the extrusion screw. , A rotating disk with concentric protrusions in which a plurality of concentric rectangular ring protrusions having different radii are formed on the disk surface on the front side (extruding screw side) of the rotating disk having a diameter larger than the screw diameter, and the tip of the extrusion cylinder A plurality of concentric ring grooves into which the concentric ring protrusions on the disk surface of the rotating disk can be fitted with a gap. And a kneading frame having a fixed disk provided.
(9) The disk-type kneading unit of the ninth means is the same as the disk-type kneading unit of the eighth means, but the cylindrical extension provided at the tip of the rotating disk is cut symmetrically and obliquely on both sides of the half-partition line of the tip circle. It is characterized by having a shape.

  (10) The disc type kneading unit of the tenth means is a disc type kneading unit installed at the tip of an extruder that kneads and plasticizes the resin material while heating it and sends it to the molding means, and is fixed to the tip of the extrusion screw. A rotating disk with concentric protrusions in which a plurality of concentric rectangular ring protrusions having different radii are formed on the delivery side of a rotating disk having a diameter larger than the screw diameter, and a rotation with the concentric protrusions fixed to the tip of the extrusion cylinder A kneading frame having disk surface fixed disks facing each other with a gap on both sides of the disk, wherein a plurality of concentric ring projections of the rotating disk can be fitted on the disk surface on the delivery side of the fixed disk with a gap. And a kneading frame provided with a concentric ring groove.

(11) The disc type kneading unit of the eleventh means is the disc type kneading unit of any of the eighth to tenth means, wherein a plurality of concentric ring protrusions of the rotating disc are cut at a plurality of radial directions at an equiangular pitch. A notch groove is provided.

(12) The disk type kneading unit of the twelfth means is a disk type kneading unit installed at the tip of an extruder that heats and plasticizes the resin material and feeds it to the molding means, and is fixed to the tip of the extrusion screw. A rotating disk with concentric protrusions, in which ring protrusions of a plurality of concentric rectangular sections with different radii are formed on both sides of a rotating disk having a diameter larger than the screw diameter, and rotation with concentric protrusions fixed on the tip of the extrusion cylinder A kneading frame having fixed disks facing each other with a gap on both sides of the disk, wherein a plurality of concentric ring grooves into which concentric ring protrusions of the rotating disk are fitted with a gap are provided on the fixed disks on both sides. It is characterized by comprising a kneading frame.

  (13) The disc-type kneading unit of the thirteenth means is the same as that of the twelfth means of the disc-type kneading unit, on both side surfaces of the rotating disk with concentric ring projections, or on a plurality of concentric ring projections on any one side A plurality of radial cutout grooves are provided in the angular pitch.

(14) The disc type kneading unit of the fourteenth means is the disc type kneading unit of any one of the first to thirteenth means, further comprising means for adjusting the gap between the rotating disc and the fixed disc. And
(15) The disc type kneading unit of the fifteenth means is provided with a cooling water passage capable of supplying cooling water to the kneading frame in the disc type kneading unit of any one of the first to fourteenth means. It is characterized by.
(16) A sixteenth means is a molding machine comprising the disk type kneading unit of any one of the first to fifteenth means.

  The invention according to claim 1 is the kneading unit of the first means, and since the groove of the rotating disk and the groove of the fixed disk have a radial spiral shape, the groove edge length is longer than a simple radial groove, and the rotating disk Since the groove edge rotates in the direction of shearing the resin, the working efficiency of dividing and shearing the resin is high, and the taper of the spiral groove has a shape that deepens in the flow direction of the resin. Has a self-cleaning property (no stagnation of resin). Further, since the rotating disk has a higher peripheral speed as the outer diameter is increased, the kneadability can be improved and the diameter of the resin outlet can be increased, so that the filtration area of the breaker and filter screen installed on the outlet side can be increased efficiently.

The kneading unit is attached to the tip of the extruder, and the screw can be easily attached and detached by removing the cover of the kneading unit frame, and the resin remains in the radial spiral groove of the fixed disk after the screw is removed. Therefore, cleaning is easy and there is almost no risk of contamination with residual resin. Moreover, when it is desired to remodel an existing extruder, it can be easily remodeled by simply replacing the kneading unit.

The invention according to claim 2 is a disk-type kneading unit in which a second means is added to the first means, and when the extrusion screw rotates, the resin is a radial spiral groove of the rotating disk and a radial spiral groove of the fixed disk. Since the resin is formed so as to be sandwiched between and guided toward the outer periphery, the flow of the resin to the outer periphery becomes uniform, and the self-cleaning property by the flowing resin is further improved.
According to a third aspect of the present invention, the third means is added to the disc-type kneading unit of the first or second means, and the both ends of the cylinder at the tip of the rotating disk are cut symmetrically and obliquely. Therefore, the resin can be uniformly fed into a large-diameter filter screen.

  The invention according to claim 4 is the disk-type kneading unit of the fourth means, wherein the radial spiral groove of the rotating disk and the radial spiral groove of the fixed disk are provided on the resin delivery side of the rotary disk, It is arranged so that the resin flow is in the centripetal direction, and has substantially the same effect as the first means. In particular, the main part of the kneading unit is inspected and cleaned simply by removing the cover on the outlet side of the kneading unit. can do. However, a large filtration area cannot be taken immediately after the kneading unit.

  According to a fifth aspect of the present invention, the fifth means is added to the disk-type kneading unit of the fourth means, and when the extrusion screw rotates, the resin is formed between the radial spiral groove of the rotating disk and the fixed disk. It is sandwiched between the radial spiral grooves and flows uniformly inward, and the self-cleaning property by the resin is further improved.

  The invention according to claim 6 is the disk-type kneading unit of the sixth means, wherein the radial spiral grooves of the rotating disk and the fixed disk of the kneading unit of the first or second means are symmetrical on the screw side and the resin delivery side. Since the structure is provided, the ability to split and shear the resin is doubled. Therefore, even if the disk diameter of the kneading unit is reduced, the same split shear efficiency can be obtained, and the size of the disk-type kneading unit can be reduced.

  The invention according to claim 7 is the disk-type kneading unit of the seventh means, wherein the radial spiral grooves of the rotating disk and the fixed disk are provided so as to intersect each other, and when the extrusion screw rotates, the groove of the disk on the extrusion screw side The resin sandwiched between them is guided toward the outer periphery, and the resin sandwiched between the grooves of the disk on the tip side is guided toward the centripetal direction, so that the resin is split and sheared between the rotating disk and the fixed disk. There is an effect of being sent uniformly.

  The inventions according to claims 8 and 10 are the disk-type kneading unit of the eighth means and the tenth means, and the rotating disk protrusion and the fixed disk groove are concentric circles entering each other. The resin infiltration length can be obtained sufficiently long, and the resin flows in the outer circumferential direction or the inner circumferential direction through the concentric groove, so that the working efficiency of dividing and shearing the resin is high. Since the concentric circular groove has no stagnant portion, it has a self-cleaning property due to the resin flow. The concentric grooves and protrusions are easy to process and inexpensive to manufacture. In particular, since the disk-type kneading unit of the eighth means can increase the diameter of the resin outlet, it has the effect of efficiently increasing the filtration area of the breaker and the filtration screen installed on the outlet side.

  In the invention according to claim 9, the ninth means is added to the disk-type kneading unit of the eighth means, and both ends of the cylinder at the tip of the rotary disk are cut symmetrically and obliquely. The resin can be uniformly fed into a filter screen having a diameter. According to an eleventh aspect of the present invention, the structure of the disk type kneading unit of the eleventh means is added to the disk type kneading unit of any of the eighth to tenth means, and the concentric ring protrusions of the rotating disk are provided. Since a plurality of radial cutout grooves are provided, there is an effect of having a better split shearing efficiency of the resin.

  The invention according to claim 12 is the disk type kneading unit of the twelfth means, wherein the combination of the concentric ring projection of the rotating disk and the concentric groove of the fixed disk is doubled. At the same time, the ability to split and shear the resin is doubled.

According to a thirteenth aspect of the present invention, the structure of the thirteenth means is added to the disk-type kneading unit of the twelfth means, and notched grooves are provided in concentric ring protrusions on one or both sides of the rotating disk. It has the effect of having excellent split shear efficiency of resin.
According to the fourteenth aspect of the present invention, the fourteenth means is added to the disk-type kneading unit of any one of the first to thirteenth means, and the gap between the rotating disk and the fixed disk can be adjusted. When the resin is kneaded, it can be adjusted so as to obtain the highest split shear efficiency.

The invention according to claim 15 is obtained by adding the fifteenth means to the disk-type kneading unit of any one of the first to fourteenth means, and when the temperature of the resin in the kneading unit rises due to the kneading action, The temperature can be adjusted to an appropriate temperature.
The invention according to claim 16 is a molding machine provided with the disk-type kneading unit of any one of the first to fifteenth means, and can obtain a high quality that the extruded resin can satisfy.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings. 1 is a side sectional view of the extruder, FIG. 2 is an enlarged sectional view of a disk-type kneading unit provided in the extruder of FIG. 1, and FIG. 3 is a perspective view showing the extrusion screw of FIG. 4 is a cross-sectional view taken along the line AA in FIG. 2, FIG. 5 is a cross-sectional view taken along the line CC in FIG. 4, and FIG. 6 is a cross-sectional view taken along the line BB in FIG. FIG. 7 is a cross-sectional view taken along the line DD of FIG. 6, and FIG. 8 is a view showing a state where the radial spiral groove of the rotating disk and the radial spiral groove of the fixed disk intersect each other along the EE cross section of FIG.

In the drawing, an extruder 1 is constituted by an extrusion cylinder 3, an extrusion screw 2, a disk-type kneading unit 10, and an unillustrated extrusion screw driving device, and a resin material supplied from a hopper 12 is kneaded and plasticized while being heated, It is fed into the disk type kneading unit 10. The kneading frame 5 of the disk-type kneading unit 10 is attached to the front end of the extrusion cylinder 3, and a shim 9 is sandwiched between the coupling portions of the extrusion cylinder 3 and the kneading frame 5.
The rotating disk 4 is coupled to the tip of the extrusion screw 2 so as to be integrated with the screw 2. A heater 11 covers the entire outer surface of the extrusion cylinder 3 and the kneading frame 5. The kneading frame 5 has a cooling water passage through which the cooling water for temperature adjustment is passed.

  The rotary disk 4 has a diameter larger than the diameter of the extrusion screw 2, and a plurality of radial spiral grooves 4a are formed at equal pitch angles on the extrusion screw 2 side of the rotary disk 4 as shown in FIG. Yes. When the rotary disk 4 is rotated together with the extrusion screw 2 (counterclockwise in FIG. 4), the radial spiral groove 4a rotates as shown in FIG. 5 at the spiral edge side of the spiral groove protrusion 4b. The downstream side of the direction is formed so as to be a tapered groove toward the bottom of the next spiral step.

  As shown in FIG. 6, a plurality of radial spiral grooves 5a similar to the radial spiral grooves 4a of the rotary disk 4 are provided on the fixed disk 5d of the kneading frame 5 facing the rotary disk 4 with a gap. As shown in FIG. 3, the radial spiral groove 5a is formed so that the spiral edge side of the spiral groove protrusion 5b is a step angle so as to face the rotating disk 4, and the circumferential direction is tapered toward the next step. 5a is formed. Further, as shown in FIG. 3, the rotating disk 4 is formed with a chamfered portion 4c in which both sides of the front end of the cylinder are cut symmetrically and obliquely so as to send the resin uniformly.

  Downstream of the kneading frame 5, a screen 6 for filtering the molten resin and a breaker plate 7 (or a screen changer) for supporting the screen 6 are attached, and a molten resin passage 8 is connected further downstream. Also, a shim 9 is sandwiched and attached to the connecting portion between the extrusion cylinder 3 and the kneading frame 5, and by adjusting the thickness of the shim 9, the fixed disk surface of the kneading frame 5 and the radial spiral groove surface of the rotating disk 4 The gap interval can be adjusted.

The extrusion screw 2 rotates in the F direction and is heated while being fed with a raw material resin, and is plasticized to become a molten resin. The extrusion screw 2 is pressurized after the extrusion screw 2 to reach the rotation disk 4. It is extruded between the fixed disks 5d. When the rotating disk 4 rotates, when the molten resin moves from the radial spiral groove 4a to the radial spiral groove 5a of the fixed disk 5d, the spiral groove protrusion 5b rotates in the direction of shearing the resin, so that the resin is split and sheared. The efficiency is high, and the taper of the radial spiral groove 4a and the taper of the radial spiral groove 5a are deep in the flow direction of the resin, and there is no stagnation of the flowing resin and it has a sweeping property.

  Further, by adjusting the thickness of the shim 9 to narrow the gap between the rotating disk 4 and the fixed disk 5d, the shearing force between both disks can be increased. 8 shows a state in which the radial spiral groove 4a of the rotating disk 4 and the radial spiral groove 5a of the fixed disk 5d intersect each other. When the rotating disk 4 rotates in the direction indicated by the arrow F, it is sandwiched between both disks. The resin is pushed out in the outer peripheral direction indicated by the arrow f, and if the number of the radial spiral grooves 4a is increased, the flow of the resin to the outer periphery becomes uniform, and the sweepability by the flowing resin is further improved.

  Since the peripheral speed of the rotating disk 4 increases as the outer diameter increases, the kneading property is improved, and the diameter of the outlet of the kneading frame 5 increases, so that the breaker plate 7 and the screen 6 having a large filtration area are installed directly on the outlet side. can do. Further, since the chamfered portions 4c are formed by symmetrically cutting the both sides of the cylinder at the tip of the rotating disk 4, the resin can be uniformly fed into the large-diameter screen 6. Since the disk-type kneading unit 10 has high kneadability, the amount of heat generated is large, and it is necessary to appropriately adjust the resin temperature by passing cooling water through the cooling water passage 5c of the kneading frame 5.

The disk-type kneading unit 10 is attached to the tip of the extruder 1, and the extrusion screw 2 can be easily attached and detached by removing the molten resin passage 8 of the kneading frame 5, and the fixed disk 5d after the extrusion screw 2 is removed. Since it is easy to check whether the resin remains in the spiral radiating spiral groove 5a and cleaning is easy, there is almost no possibility of contamination by the residual resin. Moreover, when it is desired to remodel an existing extruder, it can be easily remodeled only by replacing the disk-type kneading unit 10.
(Second Embodiment)

  In the disk-type kneading unit 10 according to the first embodiment, the radial spiral groove for kneading is provided on the disk surface on the side of the extrusion screw 2 of the rotating disk and the fixed disk. In this second embodiment, The disc type kneading unit 20 is different in that the radial spiral groove is provided on the disk surface on the resin delivery side of the rotating disk and the fixed disk, and the inclination of the radial spiral groove of both is such that the resin is centered. It is in the direction. Hereinafter, description will be made based on a side sectional view of the disk-type kneading unit 20 in FIG. 9 and a view showing a state in which the rotating spiral disk and the radial spiral groove of the stationary disk intersect in FIG.

  In the disk-type kneading unit 20, a rotary disk 24 is screwed and fixed to a left screw 2 b provided at the tip of the extrusion screw 2, and the tip forms a part of the disk-type kneading unit 20 and a resin. A kneading frame 25 having a delivery passage is coupled to accommodate the rotating disk 24 therein. When the extrusion screw 2 is rotationally driven in the direction of arrow F and a torsional force is applied to the rotary disk 24, the screw rotates in the tightening direction with the left screw 2b at the tip of the extrusion screw 2. The disk 24 will not come out. The kneading frame 25 is provided with a cooling water passage 25c through which the cooling water for temperature adjustment passes.

  A plurality of radial spiral grooves 24a having the same angular pitch as in FIG. 4 are provided on the surface of the rotating disk 24 on the resin delivery side, and a plurality of radial spiral grooves 24d having the same shape as in FIG. A radial spiral groove 25a is provided. When the spiral groove protrusion 24b of the rotating disk 24 and the radial spiral groove 25a of the fixed disk 25d are viewed from the same direction in the HH section of FIG. 9, they are provided so as to intersect as shown in FIG. When the rotating disk 24 rotates in the direction of the broken arrow G by the resin pushing action of the screw 2 (the arrow G direction is counterclockwise because the rotating disk 24 is viewed from the pushing screw 2 side. The rotation direction is the same as the direction of the arrow F as with the extrusion screw 2), and the resin sandwiched between the radial spiral groove 24a of the rotary disk 24 and the radial spiral groove 25a of the fixed disk 25d is indicated by a broken line g. It is guided in the centripetal direction shown in. The gap distance between the rotating disk 24 and the fixed disk 25d can be adjusted by the shim 15. Reference numeral 25a denotes a spiral groove protrusion of the fixed disk 25d.

In the disk-type kneading unit 20, the radial spiral groove 25a of the fixed disk 25d and the radial spiral groove 24a of the rotating disk 24 are provided on the resin delivery side and are arranged so that the resin flow is in the centripetal direction. It has a self-cleaning property and has the same effect as the first means with respect to the kneading function. In particular, the main part of the kneading unit 20 can be inspected and cleaned simply by removing the kneading frame 25. . However, a large filtration area cannot be taken immediately after the kneading unit 20, and the filtration screen and the breaker plate are separately placed downstream of the molten resin passage 28.
(Third embodiment)

  In the disk-type kneading unit 10 according to the first embodiment and the disk-type kneading unit 20 according to the second embodiment, a radial spiral groove for kneading is provided on the disk surface on one side of the rotating disk and the fixed disk. However, the third embodiment is different in that the radial spiral groove is provided on the disk surfaces on both sides of the rotating disk and the fixed disk. The inclination of the radial spiral groove is different from that of the extrusion screw. The resin is extruded in the centrifugal direction, and the delivery side is arranged to draw the resin in the centripetal direction. Hereinafter, description will be given based on a side sectional view of the disk-type kneading unit 30 in FIG. 10 and a view showing a state in which the rotating spiral disk and the radial spiral groove of the stationary disk intersect in FIG.

  In the disk-type kneading unit 30 shown in FIG. 10, a rotating disk 34 is screwed and fixed to the left screw 2 b provided at the tip of the extrusion screw 2. The rotary disk 34 is a chamber in which a kneading frame 35 attached to the tip of the extrusion cylinder 3 with a shim 9 interposed therebetween, and a kneading unit cover 36 having a resin delivery passage 38 coupled thereto, coupled with the kneading frame 35 and the shim 15 interposed therebetween. Is housed in. When the extrusion screw 2 is rotationally driven in the direction of arrow F and a torsional force is applied to the rotary disk 34, the screw becomes a tightening direction between the screw 2b at the tip of the extrusion screw 2 and the rotary disk. 34 never comes out. Cooling water passages 35c and 36c for passing temperature-controlled cooling water are passed through the kneading frame 35 and the kneading unit cover 36.

  A plurality of radial spiral grooves 34a, 34c of the same shape as in FIG. 4 are provided on both surfaces of the rotating disk 34, and a plurality of radial spirals of the same angle pitch as in FIG. A groove 35a is provided, and the fixed disk 36d of the kneading unit cover 36 is also provided with a plurality of radial spiral grooves 36a having the same angular pitch as in FIG.

When the spiral groove protrusion 34b of the rotating disk 34 and the radial spiral groove 35a of the fixed disk 35d are viewed from the side of the extrusion screw 2, they are the same as those shown in FIG. When the spiral groove protrusion 34d and the radial spiral groove 36a of the fixed disk 36d of the kneading unit cover 36 are viewed from the resin delivery side, they are the same as those shown in FIG. Therefore, when the rotary disk 34 rotates, the resin is extruded in the centrifugal direction on the combination side of the radial spiral grooves 34a and 35a on the extrusion screw 2 side, and on the combination side of the radial spiral grooves 34c and 36a on the delivery side, The resin is drawn in the centripetal direction.

  In order to adjust the kneadability, the thickness of the shim 9 may be adjusted in order to adjust the gap distance between the rotating disk 34 and the fixed disk 35d. Further, the gap distance between the rotating disk 34 and the fixed disk 36 d can be adjusted by the shim 15. Reference numeral 35a denotes a spiral groove protrusion of the fixed disk 35d, and 36b denotes a spiral groove protrusion of the fixed disk 36d.

The radial spiral grooves 34a and 34c of the rotating disk 34, the radial spiral groove 35a of the fixed disk 35d on both sides intersecting the radial spiral grooves 34a and 34c, and the radial spiral groove 36a of the fixed disk 36d are arranged on the extrusion screw side and the resin delivery side. Since the structure is provided symmetrically, the ability to split and shear the resin is doubled. Therefore, the same split shear efficiency can be obtained even if the disk diameter of the kneading unit is reduced, and the size of the kneading unit is reduced. It becomes possible. The disc-type kneading unit 30 is self-cleaning like the disc-type kneading unit 10 according to the first embodiment and the disc-type kneading unit 20 according to the second embodiment. The main part of the disk-type kneading unit 30 can be inspected and cleaned only by removing it.
(Fourth embodiment)

  In the fourth and subsequent embodiments, instead of the radial spiral grooves provided on the disk surfaces of the rotary disk and fixed disk of the disk-type kneading unit described above, a radius is formed on the disk surface of the rotary disk on the extrusion screw side. A kneading unit in which a plurality of concentric rectangular ring protrusions having different diameters are formed, and a groove is provided on the fixed disk surface so that the aforementioned ring protrusion enters with a gap is attached to the tip of the extruder. . Hereinafter, the concentric rotating disk type kneading unit with a ring projection will be described with reference to the drawings. 11 is a side sectional view of the disk-type kneading unit according to this embodiment, FIG. 12 is a view showing the back surface of the rotating disk by the JJ section of the disk-type kneading unit of FIG. 11, and FIG. FIG. 14 is a perspective view showing the rotating disk of FIG. 13 and FIG. 14 is a view showing a ring-shaped protrusion provided with a plurality of grooves.

  In the figure, the kneading frame 45 of the disk-type kneading unit 40 is attached to the front end of the extrusion cylinder 3, and a shim 9 is sandwiched between the coupling portions of the extrusion cylinder 3 and the kneading frame 45. The rotary disk 44 is screwed into a left screw 2 b provided on the screw 2 so as to be integrated with the screw 2 at the tip of the extrusion screw 2, and is accommodated in the kneading frame 45. Further, both sides of the tip of the cylinder at the tip of the rotary disk 44 are cut symmetrically and diagonally so as to send the resin uniformly. The kneading frame 45 is provided with a cooling water passage 45c through which cooling water for temperature adjustment passes.

  By adjusting the thickness of the shim 9, the gap between the fixed disk 45d and the rotary disk 44 of the kneading frame 45 can be adjusted. Downstream of the kneading frame 45, a screen 6 for filtering the molten resin and a breaker plate 7 (or a screen changer) that supports the screen 6 are attached, and a molten resin passage 8 is further connected downstream.

  As shown in FIG. 12, a plurality of concentric rectangular ring protrusions 44b having different radii are formed on the disk surface 44a on the extrusion screw 2 side of the rotating disk 44, and the disk surface 45b of the kneading frame 45 has A plurality of concentric ring grooves 45a into which the ring protrusions 44b of the disk surface 44a of the rotating disk 44 can be inserted with a gap are provided. Increasing the number of ring protrusions 44b and the number of ring grooves 45a can increase the infiltration length of the resin, and the resin passes through the gap between the concentric ring protrusions 44b and the concentric ring groove 45a, and the outer circumferential direction. Or flow in the inner circumferential direction, so that the working efficiency of dividing and shearing the resin is high, and the concentric ring protrusions 44b and the concentric ring grooves 45a have no stagnant portions, and the resin flows uniformly. Has a self-cleaning property.

As a means for further improving the kneadability, a plurality of concentric ring protrusions 44b of the rotating disk 44 shown in FIG. 12 are provided with a plurality of radially cutout grooves 46c at an equiangular pitch, and the rotating disk 46 shown in FIG. I suggested what I did. As shown in the perspective view of FIG. 14, the rotating disk 46 has a disk surface 46a and a ring protrusion 46b. The plurality of cutout grooves 46c in the radial direction have better resin split shear efficiency. Such concentric grooves and protrusions are easy to process and inexpensive to manufacture. In particular, since the disc-type kneading unit 40 (the disc-type kneading unit 41 with the notch groove 46c) can increase the diameter of the resin outlet, the filtration area of the breaker plate and screen installed on the outlet side can be efficiently increased. Can be taken large. Further, since both sides of the cylindrical end of the rotating disk 44 (46) are symmetrically cut, the resin can be uniformly fed into the large-diameter screen 6.
(Fifth embodiment)

  As shown in FIG. 15, the disc-type kneading unit 50 of this embodiment differs from the rotary discs 44 and 46 of the disc-type kneading units 40 and 41 according to the fourth embodiment in that a plurality of disc-type kneading units 50 The rotating disk 54 is provided with a ring protrusion 54b having a concentric rectangular cross section. A plurality of concentric ring grooves into which the ring protrusions 54b of the rotating disk 54 can be fitted with a gap therebetween are fixed to the fixed disk 55d of the kneading frame 55 fixed to the tip of the extrusion cylinder 23 and placed facing the rotating disk 54. 55a is provided. The gap distance between the rotating disk 54 and the fixed disk 55d can be adjusted by the shim 15. The kneading frame 55 is provided with a cooling water passage 55c through which cooling water for temperature adjustment passes. Reference numeral 54a denotes a disk surface of the rotating disk 54, and 55b denotes a disk surface of the fixed disk 55d.

In the disk-type kneading unit 50, the plurality of ring grooves 55a of the fixed disk 55d and the ring protrusions 54b of the rotating disk 54 are provided on the resin delivery side and are arranged so that the resin flow is in the centripetal direction. The kneading function has substantially the same effect as that of the fourth embodiment. In particular, the main part of the disk-type kneading unit 50 can be inspected and cleaned only by removing the kneading frame 55. it can. However, a large filtration area cannot be taken immediately after the disk-type kneading unit 50, and the filtration screen and the breaker plate are separately placed downstream of the resin passage.
(Sixth embodiment)

  In the disk-type kneading unit 40 (41) according to the fourth embodiment and the disk-type kneading unit 50 according to the fifth embodiment, concentric ring protrusions of the rotating disk for kneading and concentric rings of the fixed disk The combination of grooves is provided on one side of the extrusion screw side or the resin delivery side. In this sixth embodiment, the combination of the ring protrusion and the ring groove is provided on both sides of the rotating disk. Is different. Hereinafter, a disc-type kneading unit 60 according to a sixth embodiment will be described with reference to a side sectional view of FIG.

  The rotary disk 64 is fixed by screwing a left screw 2b at the tip of the extrusion screw 2. A plurality of concentric rectangular ring protrusions 64b and 64d having different radii are formed on the disk surfaces 64a and 64c on both sides of the rotating disk 64, respectively. The kneading frame 65 is fixed to the tip of the extrusion cylinder 3 with the shim 9 interposed therebetween, and a plurality of concentric ring grooves into which the concentric ring protrusions 64b of the rotating disk 64 can be fitted with a gap between them are fixed to the fixed disk 65d. 65a is provided. A fixed disk 66d on the kneading unit cover 66 side fixed with the kneading frame 65 and the shim 15 interposed therebetween is provided with a plurality of concentric ring grooves 66a into which the ring protrusions 64d of the rotating disk 64 are fitted with a gap. It has been. A cooling water passage 65c for passing the temperature adjusting cooling water through the kneading frame 65 and a cooling water passage 66c for passing the temperature adjusting cooling water through the kneading unit cover 66 are provided. Reference numerals 65b and 66b denote disk surfaces of the fixed disks 65d and 66d, respectively.

  Since the combination of the ring protrusions 64b and 64d of the rotating disk 64 and the ring grooves 65a and 66a of the fixed disks 65d and 66d doubles the kneading function part, the disk-type kneading unit 40 according to the fourth embodiment, 5 has the effect of the disk-type kneading unit 50 according to the fifth embodiment, and at the same time, the ability to split and shear the resin is doubled. In other words, a small disk-type kneading unit with a reduced diameter of the rotating disk 64 can have sufficient kneading ability.

  Furthermore, if notched grooves, such as the notched grooves 46c shown in FIG. 13, are provided on both side surfaces of the rotating disk 64 or on one of the ring protrusions, the resin has further superior split shear efficiency. It becomes a kneading unit. Such concentric circular grooves, protrusions, and cutout grooves are easy to process and inexpensive to manufacture.

It is side surface sectional drawing of the extruder which concerns on the 1st Embodiment of this invention. It is an expanded sectional view of the disk type kneading unit provided in the extruder of FIG. FIG. 2 is a perspective view showing the extrusion screw of FIG. 1 and a rotating disk attached to the tip thereof. It is a figure which shows the back surface of a rotating disk by the AA cross section of FIG. It is CC sectional drawing of FIG. It is a figure which shows the front of a fixed disk by the BB cross section of FIG. It is DD sectional drawing of FIG. It is a figure which shows the state which the spiral disk of a rotating disk and a fixed disk cross | intersect by the EE cross section of FIG. 2, or the HH cross section of FIG.

It is side surface sectional drawing of the disk type kneading | mixing unit which concerns on the 2nd Embodiment of this invention. It is side surface sectional drawing of the disc type kneading unit which concerns on the 3rd Embodiment of this invention. It is side surface sectional drawing of the disc type kneading unit which concerns on the 4th Embodiment of this invention. It is a figure which shows the back surface of a rotating disk by the JJ cross section of the disk type kneading | mixing unit of FIG. It is a figure which shows what provided the some groove | channel in the ring-shaped protrusion of the rotating disk of FIG. It is a perspective view which shows the rotating disk of FIG.

It is side surface sectional drawing of the disc type kneading unit which concerns on the 5th Embodiment of this invention. It is side surface sectional drawing of the disk type kneading | mixing unit which concerns on the 6th Embodiment of this invention. FIG. 6 is a side view showing a conventional kneading dull image. It is side surface sectional drawing which shows the conventional kneading | mixing unit. It is side surface sectional drawing which shows the conventional disc type kneading unit. FIG. 20 is a front view of the rotating disk of the disk-type kneading unit of FIG. 19 as viewed from the resin supply side. FIG. 20 is a front view of the rotating disk of the disk-type kneading unit of FIG. 19 as viewed from the resin take-out side. It is a side view which shows the plasticizing screw which has the conventional trumpet-shaped front-end | tip part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Extruder 2 Extrusion screw 3, 23 Extrusion cylinder 4, 24, 34, 44, 54, 64 Rotary disk 4a, 24a, 34a, 34c Radiation spiral groove 4b, 24b, 34b, 34d Spiral groove protrusion 5, 25, 35 45, 55, 65 Kneading frames 5a, 25a, 35a, 36a Radial spiral grooves 5b, 25b, 35b, 36b Spiral groove protrusions 5c, 25c, 35c, 45c, 55c, 65c, cooling water passages 5d, 25d, 35d, 36d, 45d, 55d, 65d, 66d Fixed disk
6 Screen 7 Breaker plate 10, 20, 30, 40, 41, 50, 60 Disc type kneading unit 36, 66 Kneading unit cover 36c, 66c Cooling water passages 44, 46, 54, 64 Rotating discs 44a, 46a, 54a, 64a , 64c Disk surface 44b, 46b, 54b, 64b, 64d Ring protrusion 46c Notch groove

Claims (16)

  A disk-type kneading unit, which is attached to the tip of an extruder that is kneaded and plasticized while heating a resin material and is fed to a molding means, and a rotating disk is integrally coupled to the extrusion screw, the screw fixed to the tip of the extrusion screw A plurality of radial spiral grooves having an equiangular pitch are provided on the front side surface of a rotating disk having a diameter larger than the aperture, and the radial spiral groove has a step angle on the rotating leading edge side when the disk rotates, A rotating disk having a radial spiral groove formed so as to have a taper toward the next step of the spiral, and the rotating disk fixed to the tip of the extrusion cylinder and facing the disk with a gap from the rotating disk A plurality of radiating spiral grooves having the same shape are provided, and the radiating spiral groove has a step edge at the leading edge facing the rotation of the rotating disk, and the opposite side is below the next step. Disk type kneading unit, characterized in that the radiation spiral groove such that the tapered toward is constituted by the kneading frame which forms the fixed disk provided.   2. The disk-type kneading unit according to claim 1, wherein the plurality of radiating spiral grooves of the rotating disk and the plurality of radiating spiral grooves of the fixed disk of the kneading frame are provided so as to intersect each other when viewed from the same direction. A disk-type kneading unit, wherein the resin sandwiched between the grooves of the rotating disk and the fixed disk portion is guided toward the outer periphery when the disk is pushed and rotated. 3. The disk-type kneading unit according to claim 1 or 2, wherein the cylindrical extension provided at the tip of the rotating disk (the downstream side of the resin flow) is cut symmetrically and obliquely on both sides of the half-partition line of the tip circle. A disk-type kneading unit characterized by having a shape.   A disk-type kneading unit, which is attached to the tip of an extruder that is kneaded and plasticized while heating a resin material and is fed to a molding means, and a rotating disk is integrally coupled to the extrusion screw, the screw fixed to the tip of the extrusion screw A plurality of radial spiral grooves with equiangular pitch are provided on the resin delivery side surface of the rotating disk having a diameter larger than the aperture, and the radial spiral groove has a step angle at the rotation leading edge side when the disk rotates, and the downstream side of the radial spiral groove rotates. Is a rotating disk having a radial spiral groove formed so as to taper down to the next step of the spiral, and the rotating disk is fixed to the tip of the extrusion cylinder, and the rotating disk is opposed to the rotating disk with a gap. A plurality of radiating spiral grooves having the same shape as the disk are provided, and the radiating spiral groove has a leading edge facing the rotation of the rotating disk as a corner of the step, and the opposite side is the next step. Disk type kneading unit, characterized in that the radiation spiral groove such that the tapered towards the bottom is composed of a kneading frame which forms the fixed desk provided.   5. The disk-type kneading unit according to claim 4, wherein the spiral groove edge of the rotating disk and the spiral groove edge of the fixed disk of the kneading frame are provided so as to intersect when viewed from the same direction, and are rotated by the resin extrusion action of the extrusion screw. A disk-type kneading unit, wherein the resin sandwiched between the grooves of the rotating disk and the fixed disk portion is arranged to be guided toward the centripetal direction when the disk rotates.   It is a disk-type kneading unit installed at the tip of an extruder that kneads and plasticizes the resin material while feeding it to the molding means, and is fixed to the tip of the extrusion screw, on both sides of the rotating disk having a diameter larger than the screw diameter, A plurality of radial spiral grooves having an equiangular pitch are provided, and the radial spiral groove has a step angle on the rotation leading edge side when the disk is rotated, and a taper is formed on the downstream side of the radial spiral groove toward a step below the next spiral step. A plurality of radiating spiral grooves similar to the radiating spiral grooves of the rotating disk are provided on the rotating disk having the radiating spiral grooves formed on the opposite sides of the rotating disk with a gap between them. The radial spiral groove is a fixed desk provided with a radial spiral groove that has a leading edge facing the rotation of the rotating disk as a corner of the step, and the opposite side is tapered toward the next step. Formed to have a disk-type kneading unit, characterized in that it is composed of a kneading frame fixedly attached to the extrusion cylinder tip. 7. A disk-type kneading unit according to claim 6, wherein a plurality of spiral groove edges of the rotating disk and a plurality of spiral groove edges of the fixed disk of the kneading frame are provided so as to intersect each other when viewed from the same direction. When the rotating disk is rotated by the extrusion action, the resin sandwiched between the rotating disk on the extrusion screw side and the groove on the fixed disk part is guided toward the outer periphery and is sandwiched between the groove on the sending side rotating disk and the fixed disk part. A disc-type kneading unit, wherein the resin is arranged so as to be guided toward the centripetal direction.   A disc-type kneading unit installed at the tip of an extruder that kneads and plasticizes the resin material while heating it and sends it to the molding means, which is fixed to the tip of the extrusion screw, and is on the front side of the rotating disc having a diameter larger than the screw diameter ( There is a gap between the rotating disk with concentric protrusions in which a plurality of concentric rectangular ring protrusions with different radii are formed on the disk surface on the extrusion screw side) and the rotating disk with concentric protrusions fixed at the tip of the extrusion cylinder. And a kneading frame having a fixed disk provided with a plurality of concentric ring grooves into which concentric ring protrusions on the disk surface of the rotating disk can be inserted with a gap therebetween. A disc-type kneading unit characterized by comprising:   9. The disc-type kneading unit according to claim 8, wherein the cylindrical extension provided at the tip of the rotating disc has a shape in which both sides of a half-partition line of the tip circle are cut symmetrically and obliquely. .   A disc-type kneading unit installed at the tip of an extruder that kneads and plasticizes the resin material while heating it and sends it to the molding means, on the delivery side of a rotating disc having a diameter larger than the screw diameter fixed at the tip of the extrusion screw Rotating disk with concentric protrusions in which a plurality of concentric rectangular ring protrusions having different radii are formed, and a disk surface fixed opposite to the rotating disk with concentric protrusions fixed on the tip of the extrusion cylinder. A kneading frame having a disk, the kneading frame having a plurality of concentric ring grooves into which concentric ring projections of the rotating disk can be fitted with a gap formed on a disk surface on a delivery side of the fixed disk. A disc-type kneading unit characterized by comprising: 11. A disk type kneading unit according to claim 8, wherein a plurality of concentric ring protrusions of the rotating disk are provided with a plurality of radial cutout grooves at an equiangular pitch. Kneading unit. A disc-type kneading unit installed at the tip of an extruder that kneads and plasticizes the resin material while heating it and sends it to the molding means, on both sides of a rotating disc having a diameter larger than the screw diameter fixed at the tip of the extrusion screw. A rotating disk with concentric protrusions in which a plurality of concentric rectangular ring protrusions having different radii are formed, and a fixed disk that is fixed at the tip of the extrusion cylinder and is opposed to each other with a gap on both sides of the rotating disk with concentric protrusions A kneading frame comprising a kneading frame provided with a plurality of concentric ring grooves into which concentric ring protrusions of the rotating disk are inserted with a gap between the fixed disks on both sides. Mold kneading unit.   The disk-type kneading unit according to claim 12, wherein a plurality of concentric ring protrusions are provided at equiangular pitches on both side surfaces of the rotating disk with concentric ring protrusions or on a plurality of concentric ring protrusions on one side surface. A disc-type kneading unit characterized by the above.   14. The disc type kneading unit according to claim 1, further comprising a gap adjusting means for a gap between the rotating disc and the fixed disc.   15. The disk-type kneading unit according to claim 1, further comprising a cooling water passage through which cooling water can be supplied to the kneading frame.   A molding machine comprising the disk-type kneading unit according to claim 1.

Images